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Constantin Stan
Department of Energy Production and Use, Faculty of Power Engineering, University POLITEHNICA of Bucharest, Bucharest 060042, Romania

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Journal article
Published: 01 November 2018 in Journal of Clean Energy Technologies
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ACS Style

Constantin Stan. Energy Recovery from Industrial Feather Waste by Gasification. Journal of Clean Energy Technologies 2018, 401 -404.

AMA Style

Constantin Stan. Energy Recovery from Industrial Feather Waste by Gasification. Journal of Clean Energy Technologies. 2018; ():401-404.

Chicago/Turabian Style

Constantin Stan. 2018. "Energy Recovery from Industrial Feather Waste by Gasification." Journal of Clean Energy Technologies , no. : 401-404.

Journal article
Published: 10 June 2018 in Sustainability
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This paper presents experimental results regarding anaerobic co-digestion of the organic fraction of municipal solid waste and fruit and vegetable waste in order to establish the efficiency of a 2 m3 volume pilot plant in terms of biogas and methane yield and stability of the process. The research study presents the feasibility of developing anaerobic digestion as an effective method for municipal solid waste management. The experiments were conducted in mesophilic conditions (35 °C). Domestic waste water was used as inoculum. The results showed that the inoculum presence, temperature, and pH control, were essential in order to improve biogas production and its composition. Using liquid inoculum, the CH4 percentage in the biogas oscillated between 44% and 51%, and the biogas production from 0.504 and 0.6 m3/day. Compared to domestic waste water, animal manure increased the CH4 concentration in biogas (up to 63%), while the daily biogas production increased by 26% and varied from 0.693 to 0.786 m3. The cumulative biogas production at the end of the experiments were 11.7 m3 and 15.89 m3, respectively. Using inoculum and co-digestion, the plant startup time was significantly reduced, the total solids content decreased from 22.7% to 19.8%, while the volatile solids decreased from 37.6% to 31.2%.

ACS Style

Constantin Stan; Gerardo Collaguazo; Constantin Streche; Tiberiu Apostol; Diana Cocarta. Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup. Sustainability 2018, 10, 1939 .

AMA Style

Constantin Stan, Gerardo Collaguazo, Constantin Streche, Tiberiu Apostol, Diana Cocarta. Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup. Sustainability. 2018; 10 (6):1939.

Chicago/Turabian Style

Constantin Stan; Gerardo Collaguazo; Constantin Streche; Tiberiu Apostol; Diana Cocarta. 2018. "Pilot-Scale Anaerobic Co-Digestion of the OFMSW: Improving Biogas Production and Startup." Sustainability 10, no. 6: 1939.

Journal article
Published: 03 September 2013 in Fuel
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The paper presents the thermal–chemical treatment of residues from poultry slaughterhouses using the pyrolysis process for derived fuel production with high energy density properties, as alternative solution for waste to energy conversion. The residue consists of chicken feathers with traces of blood and offal, sampled directly from the industrial processing line. A specially designed tubular batch reactor was used for the externally heated atmospheric pressure pyrolysis. Experimental campaign reliability was ensured by using raw waste products and industrial operating parameters with temperatures in the range of 350–800 °C. The experiments were developed with respect to sample mass reduction rate, thermal degradation process kinetics, reaction products distribution, physical–chemical properties and specific energy content. The influence of process parameters on char, tar and gas formation was quantified along with the mechanisms involved. The experiments revealed that minimum treatment periods for complete volatile fraction release vary between 35 min and 3 min depending on process temperature. The char mass fraction represents 40% to 10% of the pyrolysis products. The minimum tar fraction is generated at 350 °C and increases continuously to the maximum reached at 600 °C. The pyrolysis gas yield is quasi-constant between 350 °C and 450 °C and decreases with temperature rising. The energy content of pyrolysis products was determined based on their low heating value and mass fractions. The study aimed at minimum energy consumption and quality derived fuels production using the pyrolysis process as pretreatment stage applied to a potential renewable fuel with high specific energy density (HHV-26 MJ/kg) but low combustible properties due to high water content (up to 70%).

ACS Style

Cosmin Mărculescu; Constantin Stan. Pyrolysis treatment of poultry processing industry waste for energy potential recovery as quality derived fuels. Fuel 2013, 116, 588 -594.

AMA Style

Cosmin Mărculescu, Constantin Stan. Pyrolysis treatment of poultry processing industry waste for energy potential recovery as quality derived fuels. Fuel. 2013; 116 ():588-594.

Chicago/Turabian Style

Cosmin Mărculescu; Constantin Stan. 2013. "Pyrolysis treatment of poultry processing industry waste for energy potential recovery as quality derived fuels." Fuel 116, no. : 588-594.