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Municipal solid waste and sewage sludge are produced in large quantities that are often managed through industrial composting treatment. Because of their origin, composition, and complexity, ensuring adequate stabilization of the organic matter, and sanitation of fecal contaminants during composting is of the utmost significance, and difficult to achieve on an industrial scale. In this study, the operations of six industrial composting facilities that process municipal solid waste and sewage sludge were evaluated from the point of view of the sanitation achieved and the quality of the compost produced. In addition, the results were compared using the model of industrial compost from green waste. Differences between the plants were ascribable to operations other than composting systems. High phytotoxicity and fecal contamination above legislation thresholds were found in compost produced from municipal solid waste. In contrast, compost from sewage sludge were more stable and mature than those produced from green waste, and also had an adequate level of sanitation. The raw material and operational factors are of great relevance to obtain a stable, mature, and pathogen-free compost.
Ana B. Siles-Castellano; Juan A. López-González; Macarena M. Jurado; María J. Estrella-González; Francisca Suárez-Estrella; María J. López. Compost Quality and Sanitation on Industrial Scale Composting of Municipal Solid Waste and Sewage Sludge. Applied Sciences 2021, 11, 7525 .
AMA StyleAna B. Siles-Castellano, Juan A. López-González, Macarena M. Jurado, María J. Estrella-González, Francisca Suárez-Estrella, María J. López. Compost Quality and Sanitation on Industrial Scale Composting of Municipal Solid Waste and Sewage Sludge. Applied Sciences. 2021; 11 (16):7525.
Chicago/Turabian StyleAna B. Siles-Castellano; Juan A. López-González; Macarena M. Jurado; María J. Estrella-González; Francisca Suárez-Estrella; María J. López. 2021. "Compost Quality and Sanitation on Industrial Scale Composting of Municipal Solid Waste and Sewage Sludge." Applied Sciences 11, no. 16: 7525.
This work highlights the ability of various cyanobacterial extracts from Anabaena spp., Tolypothrix spp., Nostoc or Trichormus, among others genera, to control the incidence of damping-off caused by Pythium ultimum in cucumber seedlings. Protocols applied aimed at the preliminary characterization of the cyanobacterial collection were very useful for predicting their phytotoxic, phytostimulating and biopesticidal capacity. First, the phytostimulatory or phytotoxic potential of a collection of 31 sonicated cyanobacterial extracts was analyzed by calculating the germination index in watercress seeds and the increase or loss of seedling weight. Likewise, the collection was characterized according to its ability to inhibit the growth of P. ultimum by dual culture bioassays and detached-leaf test. Finally, after selecting the most effective extracts, a preventive damping-off bioassay was performed based on cucumber seed biopriming. The strain SAB-M465 showed to be the most efficient strain against the in vitro growth of P. ultimum, while SAB-B912 was more discreet in this regard, but proved to be the most effective as a germination stimulator. Seed biopriming strategy with sonicated extracts of cyanobacteria revealed a remarkable promoter effect in the early stages of plant development, although only SAB-M465 was positioned as an effective control agent against damping-off caused by P. ultimum in cucumber seedbeds.
A.J. Toribio; M.M. Jurado; F. Suárez-Estrella; M.J. López; J.A. López-González; J. Moreno. Seed biopriming with cyanobacterial extracts as an eco-friendly strategy to control damping off caused by Pythium ultimum in seedbeds. Microbiological Research 2021, 248, 126766 .
AMA StyleA.J. Toribio, M.M. Jurado, F. Suárez-Estrella, M.J. López, J.A. López-González, J. Moreno. Seed biopriming with cyanobacterial extracts as an eco-friendly strategy to control damping off caused by Pythium ultimum in seedbeds. Microbiological Research. 2021; 248 ():126766.
Chicago/Turabian StyleA.J. Toribio; M.M. Jurado; F. Suárez-Estrella; M.J. López; J.A. López-González; J. Moreno. 2021. "Seed biopriming with cyanobacterial extracts as an eco-friendly strategy to control damping off caused by Pythium ultimum in seedbeds." Microbiological Research 248, no. : 126766.
Currently, the metagenomic study of the composting process has gained great importance since it has allowed the identification of the existence of microorganisms that, until now, had not been isolated during the process by traditional techniques. However, it is still complex to determine which bioindicators could reveal the degree of maturity and stability of a particular compost. Thereby, the main objective of this work was to demonstrate the possible correlation between traditional parameters of maturity and stability of compost, with other indicators of biodiversity in products highly heterogeneous from composting processes on an industrial scale. The results demonstrated the enormous influence of the raw materials in characterizing the products obtained. Even so, important relationships were established between the Chao1 and Shannon indexes, and certain parameters related to the maturity, stability and toxicity of the samples, such as nitrification index, humification rate, phenolic content, germination index or oxygen consumption.
M.J. Estrella-González; F. Suárez-Estrella; M.M. Jurado; Maria J. Lopez; Juan Antonio López-González; A.B. Siles-Castellano; Antonio Muñoz Merida; J. Moreno. Uncovering new indicators to predict stability, maturity and biodiversity of compost on an industrial scale. Bioresource Technology 2020, 313, 123557 .
AMA StyleM.J. Estrella-González, F. Suárez-Estrella, M.M. Jurado, Maria J. Lopez, Juan Antonio López-González, A.B. Siles-Castellano, Antonio Muñoz Merida, J. Moreno. Uncovering new indicators to predict stability, maturity and biodiversity of compost on an industrial scale. Bioresource Technology. 2020; 313 ():123557.
Chicago/Turabian StyleM.J. Estrella-González; F. Suárez-Estrella; M.M. Jurado; Maria J. Lopez; Juan Antonio López-González; A.B. Siles-Castellano; Antonio Muñoz Merida; J. Moreno. 2020. "Uncovering new indicators to predict stability, maturity and biodiversity of compost on an industrial scale." Bioresource Technology 313, no. : 123557.
This work clarifies some of the substances involved with the biostimulant effect shown by 28 cyanobacteria isolated from different aquatic environments. The production of salicylic acid, cytokinins, siderophores and phosphate solubilization were analyzed in vitro, as well as the phytostimulant/phytotoxic effect on watercress seeds at two different extract concentrations (0.5 and 0.2 mg mL−1). The most prominent plant growth promoting cyanobacteria were verified in vivo at two different doses (0.5 and 0.1 mg mL−1). 21.4 % and 7.1 % of the tested strains produced siderophores or phosphate solubilization, respectively. The production of salicylic acid was stood out for the strains Calothrix SAB-B797, Nostoc SAB-B1300 and Nostoc SAB-M612, while Nostoc SAB-M251 and Trichormus SAB-M304 were noticeable regard to cytokinin production. The highest values of germination occurred when the extracts were applied in low dose (0.5 mg mL−1). Nostoc SAB-M612 provoked the stimulation of aerial and radicular growth in cucumber seedlings.
A.J. Toribio; F. Suárez-Estrella; M.M. Jurado; Maria J. Lopez; Juan Antonio López-González; J. Moreno. Prospection of cyanobacteria producing bioactive substances and their application as potential phytostimulating agents. Biotechnology Reports 2020, 26, e00449 .
AMA StyleA.J. Toribio, F. Suárez-Estrella, M.M. Jurado, Maria J. Lopez, Juan Antonio López-González, J. Moreno. Prospection of cyanobacteria producing bioactive substances and their application as potential phytostimulating agents. Biotechnology Reports. 2020; 26 ():e00449.
Chicago/Turabian StyleA.J. Toribio; F. Suárez-Estrella; M.M. Jurado; Maria J. Lopez; Juan Antonio López-González; J. Moreno. 2020. "Prospection of cyanobacteria producing bioactive substances and their application as potential phytostimulating agents." Biotechnology Reports 26, no. : e00449.
Success of composting as an ecological technology for organic waste management has allowed its implementation in the current circular economy models. However, composting on an industrial scale often shows drawbacks and peculiarities. In this work, a comparative analysis of 15 industrial composting facilities was carried out in which different anthropogenic organic waste were processed. Results showed that composting process on an industrial scale did not always evolve in a standard way. Monitoring parameters as well as enzymatic activity depended largely on the raw materials and were strongly linked to the transformation of nitrogen fractions. Despite the heterogeneity of the processes and raw materials, microbial activity managed to the optimal biotransformation, obtaining products that comply with the agronomic quality standards. This work represents a breakthrough in composting and provides new knowledge for better management of this process on an industrial scale.
M.J. Estrella-González; Juan Antonio López-González; F. Suárez-Estrella; Maria J. Lopez; M.M. Jurado; A.B. Siles-Castellano; J. Moreno. Evaluating the influence of raw materials on the behavior of nitrogen fractions in composting processes on an industrial scale. Bioresource Technology 2020, 303, 122945 .
AMA StyleM.J. Estrella-González, Juan Antonio López-González, F. Suárez-Estrella, Maria J. Lopez, M.M. Jurado, A.B. Siles-Castellano, J. Moreno. Evaluating the influence of raw materials on the behavior of nitrogen fractions in composting processes on an industrial scale. Bioresource Technology. 2020; 303 ():122945.
Chicago/Turabian StyleM.J. Estrella-González; Juan Antonio López-González; F. Suárez-Estrella; Maria J. Lopez; M.M. Jurado; A.B. Siles-Castellano; J. Moreno. 2020. "Evaluating the influence of raw materials on the behavior of nitrogen fractions in composting processes on an industrial scale." Bioresource Technology 303, no. : 122945.
In the new European Waste Law, composting is proposed as one of the best options to properly manage organic waste of anthropogenic origin. Currently, the massive generation of this type of waste, as well as its heterogeneity, makes difficult in many cases control this process of degradation on an industrial scale. In this work, 15 facilities were selected based on 5 types of organic waste: Urban Solid Waste, Vegetable Waste, Sewage Sludges, Agrifood Waste and "Alpeorujo". The samples were collected in different thermal phases. The results revealed very different physicochemical and enzymatic profiles, as well as different degrees of humification depending on the process and the raw materials. However, parameters such as β-glucosidase, amylase, lignin/holocellulose ratio and humification rate showed similar trends in all cases. All of them could act as important indicators to evaluate the quality of a composting process, despite the heterogeneity of the starting materials.
M.J. Estrella-González; M.M. Jurado; F. Suárez-Estrella; Maria J. Lopez; Juan Antonio López-González; A. Siles-Castellano; J. Moreno. Enzymatic profiles associated with the evolution of the lignocellulosic fraction during industrial-scale composting of anthropogenic waste: Comparative analysis. Journal of Environmental Management 2019, 248, 109312 .
AMA StyleM.J. Estrella-González, M.M. Jurado, F. Suárez-Estrella, Maria J. Lopez, Juan Antonio López-González, A. Siles-Castellano, J. Moreno. Enzymatic profiles associated with the evolution of the lignocellulosic fraction during industrial-scale composting of anthropogenic waste: Comparative analysis. Journal of Environmental Management. 2019; 248 ():109312.
Chicago/Turabian StyleM.J. Estrella-González; M.M. Jurado; F. Suárez-Estrella; Maria J. Lopez; Juan Antonio López-González; A. Siles-Castellano; J. Moreno. 2019. "Enzymatic profiles associated with the evolution of the lignocellulosic fraction during industrial-scale composting of anthropogenic waste: Comparative analysis." Journal of Environmental Management 248, no. : 109312.
The vast and ever-growing amount of agricultural and food wastes has become a major concern throughout the whole world. Therefore, strategies for their processing and value-added reuse are needed to enable a sustainable utilization of feedstocks and reduce the environmental burden. By-products of potato, tomato, cereals and olive arise in significant amounts in European countries and are consequently of high relevance. Due to their composition with various beneficial ingredients, the waste products can be valorized by different techniques leading to economic and environmental advantages. This paper focuses on the waste generation during industrial processing of potato, tomato, cereals and olives within the European Union and reviews state-of-the-art technologies for their valorization. Furthermore, current applications, future perspectives and challenges are discussed.
Caroline Fritsch; Andreas Staebler; Anton Happel; Miguel Angel Cubero Márquez; Ingrid Aguiló-Aguayo; Maribel Abadias; Miriam Gallur; Ilaria Maria Cigognini; Angela Montanari; Maria Jose López; Francisca Suárez-Estrella; Nigel Brunton; Elisa Luengo; Laura Sisti; Maura Ferri; Gianluca Belotti. Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review. Sustainability 2017, 9, 1492 .
AMA StyleCaroline Fritsch, Andreas Staebler, Anton Happel, Miguel Angel Cubero Márquez, Ingrid Aguiló-Aguayo, Maribel Abadias, Miriam Gallur, Ilaria Maria Cigognini, Angela Montanari, Maria Jose López, Francisca Suárez-Estrella, Nigel Brunton, Elisa Luengo, Laura Sisti, Maura Ferri, Gianluca Belotti. Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review. Sustainability. 2017; 9 (8):1492.
Chicago/Turabian StyleCaroline Fritsch; Andreas Staebler; Anton Happel; Miguel Angel Cubero Márquez; Ingrid Aguiló-Aguayo; Maribel Abadias; Miriam Gallur; Ilaria Maria Cigognini; Angela Montanari; Maria Jose López; Francisca Suárez-Estrella; Nigel Brunton; Elisa Luengo; Laura Sisti; Maura Ferri; Gianluca Belotti. 2017. "Processing, Valorization and Application of Bio-Waste Derived Compounds from Potato, Tomato, Olive and Cereals: A Review." Sustainability 9, no. 8: 1492.
A comprehensive characterization of the culturable mycobiota associated to all stages of lignocellulose-based composting was achieved. A total of 77 different isolates were detected, 69 of which were identified on the basis of the 5.8-ITS region sequencing. All the isolates were assigned to the phyla Ascomycota and Basidiomycota, with prevalence of the Sordariomycetes (19) and Eurotiomycetes (17) classes. Penicillium was the most represented genus (11 species), while the species Gibellulopsis nigrescens and Microascus brevicaulis were detected at all the composting stages and showed the highest relative abundances. Fungal diversity decreased as the process proceed, while similarity between fungal communities associated to different samples were maximal for those phases closely connected chronologically and showing similar biological activity degree. Thus, the structure of the lignocellulose-based composting mycobiota can be divided into two major stages corresponding to bio-oxidative phase and maturation phase together with the final product, with a transitional cooling stage joining both of them.
Juan Antonio López-González; María Del Carmen Vargas-García; Maria J. Lopez; Francisca Suárez Estrella; Macarena Del Mar Jurado; Joaquín Moreno. Biodiversity and succession of mycobiota associated to agricultural lignocellulosic waste-based composting. Bioresource Technology 2015, 187, 305 -313.
AMA StyleJuan Antonio López-González, María Del Carmen Vargas-García, Maria J. Lopez, Francisca Suárez Estrella, Macarena Del Mar Jurado, Joaquín Moreno. Biodiversity and succession of mycobiota associated to agricultural lignocellulosic waste-based composting. Bioresource Technology. 2015; 187 ():305-313.
Chicago/Turabian StyleJuan Antonio López-González; María Del Carmen Vargas-García; Maria J. Lopez; Francisca Suárez Estrella; Macarena Del Mar Jurado; Joaquín Moreno. 2015. "Biodiversity and succession of mycobiota associated to agricultural lignocellulosic waste-based composting." Bioresource Technology 187, no. : 305-313.
Enhanced organic matter turnover was detected in lignocellulosic composting piles inoculated with microorganisms specifically capable of decomposing polymeric compounds. In comparison to uninoculated piles, the following results were obtained in the inoculated piles: degradation of hemicellulose, cellulose and lignin were 28%, 21% and 25% respectively higher. Total organic matter, total sugars and phenolic compounds also decreased more intensely. Greater amounts of soluble organic carbon, reducing sugars and soluble proteins were available to the composting microbiota. Recycling of organic to inorganic nitrogen was improved and humification was more intense and earlier attained. Microbial community structure was also affected by inoculation. It was initially thought that these effects were due to enzymatic capabilities of inoculants, however, microbial counts, especially those corresponding to functional groups, revealed that inoculation induced a true stimulation of microbial growth and activity in the entire composting microbiota which was actually responsible for all the beneficial effects reported here.
M.M. Jurado; Francisca Suárez Estrella; Maria J. Lopez; Mª Del Carmen Vargas García; Juan Antonio López-González; J. Moreno. Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting. Bioresource Technology 2015, 186, 15 -24.
AMA StyleM.M. Jurado, Francisca Suárez Estrella, Maria J. Lopez, Mª Del Carmen Vargas García, Juan Antonio López-González, J. Moreno. Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting. Bioresource Technology. 2015; 186 ():15-24.
Chicago/Turabian StyleM.M. Jurado; Francisca Suárez Estrella; Maria J. Lopez; Mª Del Carmen Vargas García; Juan Antonio López-González; J. Moreno. 2015. "Enhanced turnover of organic matter fractions by microbial stimulation during lignocellulosic waste composting." Bioresource Technology 186, no. : 15-24.
An intensive isolation program carried out in three replicated composting piles allowed the identification of the resident and transient components of the composting microbiome. More than 4000 bacterial strains were isolated, enzymatically characterized and identified by partial sequencing of their 16S rRNA gene. While microorganisms isolated under mesophilic conditions were prominent throughout the process, thermophilic stages gathered the highest total counts and spore-forming bacteria prevailed at the bio-oxidative phase of composting. Enzymatic capabilities related to the degradation of polymeric materials were exhibited by most of the isolates and as a result of these activities, more soluble compounds could be made available to the entire composting microbiota. A high proportion of isolates showed to be thermotolerant as they were detected at mesophilic and thermophilic phases. Isolated strains belonged to 187 bacterial species. Biodiversity was greater at the central stages of composting and mesophilic, thermophilic and cooling phases shared 50% of species.
Juan Antonio López-González; Francisca Suárez Estrella; Mª Del Carmen Vargas García; Maria J. Lopez; M.M. Jurado; J. Moreno. Dynamics of bacterial microbiota during lignocellulosic waste composting: Studies upon its structure, functionality and biodiversity. Bioresource Technology 2015, 175, 406 -416.
AMA StyleJuan Antonio López-González, Francisca Suárez Estrella, Mª Del Carmen Vargas García, Maria J. Lopez, M.M. Jurado, J. Moreno. Dynamics of bacterial microbiota during lignocellulosic waste composting: Studies upon its structure, functionality and biodiversity. Bioresource Technology. 2015; 175 ():406-416.
Chicago/Turabian StyleJuan Antonio López-González; Francisca Suárez Estrella; Mª Del Carmen Vargas García; Maria J. Lopez; M.M. Jurado; J. Moreno. 2015. "Dynamics of bacterial microbiota during lignocellulosic waste composting: Studies upon its structure, functionality and biodiversity." Bioresource Technology 175, no. : 406-416.
Successful composting is dependent upon microbial performance. An interdependent relationship is established between environmental and nutritional properties that rule the process and characteristics of the dominant microbial communities. To reach a better understanding of this relationship, the dynamics of major metabolic activities associated with cultivable isolates according to composting phases were evaluated. Ammonification (72.04%), amylolysis (35.65%), hemicellulolyis (30.75%), and proteolysis (33.61%) were the more frequent activities among isolates, with mesophilic bacteria and fungi as the prevalent microbial communities. Bacteria were mainly responsible for starch hydrolysis, while a higher percentage of hemicellulolytic and proteolytic isolates were ascribable to fungi. Composting seems to exert a functional selective effect on microbial communities by promoting the presence of specific metabolically dominant groups at each stage of the process. Moreover, the application of conglomerate analysis led to the statement of a clear correlation between the chronology of the process and characteristics of the associated microbiota. According to metabolic capabilities of the isolates and their density, three clear clusters were obtained corresponding to the start of the process, including the first thermophilic peak, the rest of the bio-oxidative stage, and the maturation phase.
Juan Antonio López-González; María Del Carmen Vargas-García; Maria J. Lopez; Francisca Suárez Estrella; Macarena Jurado; Joaquín Moreno. Enzymatic characterization of microbial isolates from lignocellulose waste composting: Chronological evolution. Journal of Environmental Management 2014, 145, 137 -146.
AMA StyleJuan Antonio López-González, María Del Carmen Vargas-García, Maria J. Lopez, Francisca Suárez Estrella, Macarena Jurado, Joaquín Moreno. Enzymatic characterization of microbial isolates from lignocellulose waste composting: Chronological evolution. Journal of Environmental Management. 2014; 145 ():137-146.
Chicago/Turabian StyleJuan Antonio López-González; María Del Carmen Vargas-García; Maria J. Lopez; Francisca Suárez Estrella; Macarena Jurado; Joaquín Moreno. 2014. "Enzymatic characterization of microbial isolates from lignocellulose waste composting: Chronological evolution." Journal of Environmental Management 145, no. : 137-146.
M.M. Jurado; Francisca Suárez Estrella; Mª Del Carmen Vargas García; Maria J. Lopez; Juan Antonio López-González; J. Moreno. Increasing native microbiota in lignocellulosic waste composting: Effects on process efficiency and final product maturity. Process Biochemistry 2014, 49, 1958 -1969.
AMA StyleM.M. Jurado, Francisca Suárez Estrella, Mª Del Carmen Vargas García, Maria J. Lopez, Juan Antonio López-González, J. Moreno. Increasing native microbiota in lignocellulosic waste composting: Effects on process efficiency and final product maturity. Process Biochemistry. 2014; 49 (11):1958-1969.
Chicago/Turabian StyleM.M. Jurado; Francisca Suárez Estrella; Mª Del Carmen Vargas García; Maria J. Lopez; Juan Antonio López-González; J. Moreno. 2014. "Increasing native microbiota in lignocellulosic waste composting: Effects on process efficiency and final product maturity." Process Biochemistry 49, no. 11: 1958-1969.
The composting ecosystem is a suitable source for the discovery of novel microorganisms and secondary metabolites. This work analyzes the identity of microbial community that persists throughout lignocellulose-based composting, evaluates their metabolic activities and studies the capability of selected isolates for composting bioaugmentation. Bacterial species of the phyla Firmicutes, Actinobacteria and Proteobacteria and fungi of the phylum Ascomycota were ubiquitous throughout the composting. The species Arthrobacter russicus, Microbacterium gubbeenense, Ochrocladosporium frigidarii and Cladosporium lignicola are detected for the first time in this ecosystem. In addition, several bacterial and fungal isolates exhibited a wide range of metabolic capabilities such as polymers (lignocellulose, protein, lipids, pectin and starch) breakdown and phosphate-solubilization that may find many biotechnological applications. In particular, Streptomyces albus BM292, Gibellulopsis nigrescens FM1397 and FM1411, Bacillus licheniformis BT575, Bacillus smithii AT907 and Alternaria tenuissima FM1385 exhibited a great potential as inoculants for composting bioaugmentation.
Macarena Jurado; Maria J. Lopez; Francisca Suárez Estrella; Mª Del Carmen Vargas García; Juan Antonio López-González; Joaquín Moreno. Exploiting composting biodiversity: Study of the persistent and biotechnologically relevant microorganisms from lignocellulose-based composting. Bioresource Technology 2014, 162, 283 -293.
AMA StyleMacarena Jurado, Maria J. Lopez, Francisca Suárez Estrella, Mª Del Carmen Vargas García, Juan Antonio López-González, Joaquín Moreno. Exploiting composting biodiversity: Study of the persistent and biotechnologically relevant microorganisms from lignocellulose-based composting. Bioresource Technology. 2014; 162 ():283-293.
Chicago/Turabian StyleMacarena Jurado; Maria J. Lopez; Francisca Suárez Estrella; Mª Del Carmen Vargas García; Juan Antonio López-González; Joaquín Moreno. 2014. "Exploiting composting biodiversity: Study of the persistent and biotechnologically relevant microorganisms from lignocellulose-based composting." Bioresource Technology 162, no. : 283-293.
Many alternatives for the proper disposal of horticultural plant wastes have been studied, and composting is one of the most attractive due to its insignificant environmental impact and low cost. The quality of compost for agronomical use is related to the degree of organic matter maturation and stabilization. Traditional parameters as well as temperature, ratio C/N, cationic exchange capacity, extractable carbon, or evolution of humificated substances have been successfully used to assess compost maturity and stability. However, microorganisms frequently isolated during composting release a wide range of hydrolytic enzymes, whose activity could apparently give interesting information on the rate of decomposition of organic matter and, therefore, on the product stability. The aim of this work was to study the evolution of some important enzymatic activities during composting of agricultural wastes and their comparison with other chemical parameters commonly employed as quality and maturity indexes, to establish a relationship between the degradation intensity of specific organic carbon fractions throughout the process. In this work, the chemical and biochemical parameters of plant wastes were studied along a composting process of 189 days to evaluate their importance as tools for compost characterization. Results showed an intense enzymatic activity during the first 2-3 weeks of composting (bio-oxidative phase), because of the availability of easily decomposable organic compounds. From a biological point of view, a less intense phase was observed between second and third month of composting (mesophilic or cooling phase). Finally, chemical humification parameters were more closely associated with the period between 119 and 189 days (maturation phase). Significant correlations between the enzymatic activities as well as between enzyme activities and other more traditional parameters were also highlighted, indicating that both kind of indexes can be a reliable tool to determine the degree of stability and maturation of horticultural plant wastes based-compost.
M.M. Jurado; F. Suárez-Estrella; M.C. Vargas-García; M.J. López; J.A. López-González; J. Moreno. Evolution of enzymatic activities and carbon fractions throughout composting of plant waste. Journal of Environmental Management 2014, 133, 355 -364.
AMA StyleM.M. Jurado, F. Suárez-Estrella, M.C. Vargas-García, M.J. López, J.A. López-González, J. Moreno. Evolution of enzymatic activities and carbon fractions throughout composting of plant waste. Journal of Environmental Management. 2014; 133 ():355-364.
Chicago/Turabian StyleM.M. Jurado; F. Suárez-Estrella; M.C. Vargas-García; M.J. López; J.A. López-González; J. Moreno. 2014. "Evolution of enzymatic activities and carbon fractions throughout composting of plant waste." Journal of Environmental Management 133, no. : 355-364.
Francisca Suárez Estrella; M.A. Arcos-Nievas; Maria J. Lopez; Mª Del Carmen Vargas García; J. Moreno. Biological control of plant pathogens by microorganisms isolated from agro-industrial composts. Biological Control 2013, 67, 509 -515.
AMA StyleFrancisca Suárez Estrella, M.A. Arcos-Nievas, Maria J. Lopez, Mª Del Carmen Vargas García, J. Moreno. Biological control of plant pathogens by microorganisms isolated from agro-industrial composts. Biological Control. 2013; 67 (3):509-515.
Chicago/Turabian StyleFrancisca Suárez Estrella; M.A. Arcos-Nievas; Maria J. Lopez; Mª Del Carmen Vargas García; J. Moreno. 2013. "Biological control of plant pathogens by microorganisms isolated from agro-industrial composts." Biological Control 67, no. 3: 509-515.
J. Moreno; M.J. López; Mª Del Carmen Vargas García; F. Suárez‐Estrella. RECENT ADVANCES IN MICROBIAL ASPECTS OF COMPOST PRODUCTION AND USE. Acta Horticulturae 2013, 443 -457.
AMA StyleJ. Moreno, M.J. López, Mª Del Carmen Vargas García, F. Suárez‐Estrella. RECENT ADVANCES IN MICROBIAL ASPECTS OF COMPOST PRODUCTION AND USE. Acta Horticulturae. 2013; (1013):443-457.
Chicago/Turabian StyleJ. Moreno; M.J. López; Mª Del Carmen Vargas García; F. Suárez‐Estrella. 2013. "RECENT ADVANCES IN MICROBIAL ASPECTS OF COMPOST PRODUCTION AND USE." Acta Horticulturae , no. 1013: 443-457.
Maria J. López; Francisca Suárez-Estrella; Maria C. Vargas-García; Juan A. López-González; Steven Verstichel; Lies Debeer; Isabella Wierinck; Joaquin Moreno. Biodelignification of agricultural and forest wastes: Effect on anaerobic digestion. Biomass and Bioenergy 2013, 58, 343 -349.
AMA StyleMaria J. López, Francisca Suárez-Estrella, Maria C. Vargas-García, Juan A. López-González, Steven Verstichel, Lies Debeer, Isabella Wierinck, Joaquin Moreno. Biodelignification of agricultural and forest wastes: Effect on anaerobic digestion. Biomass and Bioenergy. 2013; 58 ():343-349.
Chicago/Turabian StyleMaria J. López; Francisca Suárez-Estrella; Maria C. Vargas-García; Juan A. López-González; Steven Verstichel; Lies Debeer; Isabella Wierinck; Joaquin Moreno. 2013. "Biodelignification of agricultural and forest wastes: Effect on anaerobic digestion." Biomass and Bioenergy 58, no. : 343-349.
Although increasing soil fertility is the main use of compost, the presence of bio-protective microorganisms against plant pathogens confers it an added value. Here we review a microbial collection from plant waste based composting piles, and we tested the selected microbiota towards phytopathogenic bacteria and fungi. The raw material used for composting mixtures was vegetable waste from organic agriculture. Compost samples were collected at different stages of the composting process and one hundred and twenty-six microbial strains were selected. Phytopahtogenic strains were supplied by the Spanish Type Culture Collection: Fusarium oxysporum f.sp. melonis CECT 20474, Rhizoctonia solani CECT 2824, Pythium ultimum CECT 2365, Pectobacterium carotovorum subsp. carotovorum CECT 225, Pseudomonas syringae subsp. syringae CECT 127 and Xanthomonas campestris CECT 95. Forty out of all tested isolates showed in vitro antagonistic activity against at least three out of the six phytopathogenic agents investigated. Six strains were then selected and in vivo tested to induce systemic resistance in melon plants towards the fungus Fom. In the presence on antagonistic strains, plants exhibited an enhanced defensive capacity against the pathogenic fungus as compared with non-inoculated control plants. Two strains identified as Bacillus subtilis and Penicillium chrysogenum showed a higher antagonistic capacity against Fom. These biocontrol agents showed a disease reduction range near to 50% and weakly affected plant health in the absence of phytopathogen. On the basis of the results here shown, this study was successful in selecting some biocontrol agents which showed to be effective against important and devastating phytopathogen microorganisms. According to this research work, these microorganisms could potentially be formulated and used as biopesticide products, avoiding the adverse environmental effects of chemical hazardous pesticides.
Francisca Suárez Estrella; M.M. Jurado; Mª Del Carmen Vargas García; Maria J. Lopez; J. Moreno. Isolation of bio-protective microbial agents from eco-composts. Biological Control 2013, 67, 66 -74.
AMA StyleFrancisca Suárez Estrella, M.M. Jurado, Mª Del Carmen Vargas García, Maria J. Lopez, J. Moreno. Isolation of bio-protective microbial agents from eco-composts. Biological Control. 2013; 67 (1):66-74.
Chicago/Turabian StyleFrancisca Suárez Estrella; M.M. Jurado; Mª Del Carmen Vargas García; Maria J. Lopez; J. Moreno. 2013. "Isolation of bio-protective microbial agents from eco-composts." Biological Control 67, no. 1: 66-74.
The dynamics of biologically meaningful soluble and polymeric carbon fractions and the combined relationships between physical, chemical and biological parameters during composting of lignocellulosic waste were evaluated. The first thermophilic stage is crucial in determining the further evolution of soluble and polymeric carbon fractions but the dynamics of carbon is still important at the maturation stage. Multivariate data analysis showed that not only are all parameters interrelated but also influence one another's variability. To discern completion of bio-oxidative stage other parameters in addition to temperature should be measured. Evaluation of soluble organic carbon, microbial biomass carbon, pH and inorganic nitrogen can be of great use in detecting the composting stage. This study offers new insights into the mechanisms involved in the biodegradation of organic matter and help to prioritize the parameters that contribute at critical stages of the process.
Juan Antonio López-González; Maria J. Lopez; Mª Del Carmen Vargas García; Francisca Suárez Estrella; Macarena Jurado; Joaquín Moreno. Tracking organic matter and microbiota dynamics during the stages of lignocellulosic waste composting. Bioresource Technology 2013, 146, 574 -584.
AMA StyleJuan Antonio López-González, Maria J. Lopez, Mª Del Carmen Vargas García, Francisca Suárez Estrella, Macarena Jurado, Joaquín Moreno. Tracking organic matter and microbiota dynamics during the stages of lignocellulosic waste composting. Bioresource Technology. 2013; 146 ():574-584.
Chicago/Turabian StyleJuan Antonio López-González; Maria J. Lopez; Mª Del Carmen Vargas García; Francisca Suárez Estrella; Macarena Jurado; Joaquín Moreno. 2013. "Tracking organic matter and microbiota dynamics during the stages of lignocellulosic waste composting." Bioresource Technology 146, no. : 574-584.
Polypropylene (PP)/wood composites were produced by homogenization in a twin-screw extruder and injection molding of tensile bars. Their mechanical properties were determined before and after exposure to biological treatment, and the effect of the treatment was assessed by various ways including visual inspection and the measurement of weight loss. The ecotoxicity of the materials was also evaluated by using the bioluminescent bacteria Vibrio fischeri. The results proved that wood facilitates biodeterioration (colonization) under the conditions used. The coupling agents do not have inhibitory effect, but seems to stimulate fungal growth (biodeterioration) at large loads of wood flour. PP/wood composites can be considered quite durable, but the influence of wood content on environmental resistance must be taken into account for materials intended for applications requiring long-term outdoor exposure as the time of exposure to microbial colonization increases. Direct ecotoxic effect on aquatic ecosystems cannot be expected from PP/wood composites
András Sudár; Maria J. Lopez; Gergely Keledi; Mª Del Carmen Vargas García; Francisca Suárez Estrella; Joaquín Moreno; Christoph Burgstaller; Béla Pukánszky. Ecotoxicity and fungal deterioration of recycled polypropylene/wood composites: Effect of wood content and coupling. Chemosphere 2013, 93, 408 -414.
AMA StyleAndrás Sudár, Maria J. Lopez, Gergely Keledi, Mª Del Carmen Vargas García, Francisca Suárez Estrella, Joaquín Moreno, Christoph Burgstaller, Béla Pukánszky. Ecotoxicity and fungal deterioration of recycled polypropylene/wood composites: Effect of wood content and coupling. Chemosphere. 2013; 93 (2):408-414.
Chicago/Turabian StyleAndrás Sudár; Maria J. Lopez; Gergely Keledi; Mª Del Carmen Vargas García; Francisca Suárez Estrella; Joaquín Moreno; Christoph Burgstaller; Béla Pukánszky. 2013. "Ecotoxicity and fungal deterioration of recycled polypropylene/wood composites: Effect of wood content and coupling." Chemosphere 93, no. 2: 408-414.