High-efficiency bioremediation technology for heavy oil pollution has been a popular research topic in recent years. Laccase is very promising for the remediation of heavy oil pollution because it can not only convert bio-refractory hydrocarbons into less toxic or completely harmless compounds, but also accelerate the biodegradation efficiency of heavy oil. However, there are few reports on the use of laccase to enhance the biodegradation of heavy oil. In this study, we investigated the effect of laccase on the bacterial consortia degradation of heavy oil. The degradation efficiencies of bacterial consortia and the laccase-bacterial consortia were 60.6 ± 0.1% and 68.2 ± 0.6%, respectively, and the corresponding heavy oil degradation rate constants were 0.112 day⁻¹ and 0.198 day⁻¹, respectively. The addition of laccase increased the heavy oil biodegradation efficiency (p < 0.05) and biodegradation rate of the bacterial consortia. Moreover, gas chromatography–mass spectrometry analysis showed that the biodegradation efficiencies of the laccase-bacterial consortia for saturated hydrocarbons and aromatic hydrocarbons were 82.5 ± 0.7% and 76.2 ± 0.9%, respectively, which were 16.0 ± 0.3% and 13.0 ± 1.8% higher than those of the bacterial consortia, respectively. In addition, the degradation rate constants of the laccase-bacterial consortia for saturated hydrocarbons and aromatic hydrocarbons were 0.267 day⁻¹ and 0.226 day⁻¹, respectively, which were 1.07 and 1.15 times higher than those of the bacterial consortia, respectively. The degradation of C15 to C35 n-alkanes and 2 to 5-ring polycyclic aromatic hydrocarbons by laccase-bacterial consortia was higher than individual bacterial consortia. It is further seen that the addition of laccase significantly improved the biodegradation of long-chain n-alkanes of C22–C35 (p < 0.05). Overall, this study shows that the combination of laccase and bacterial consortia is an effective remediation technology for heavy oil pollution. Adding laccase can significantly improve the heavy oil biodegradation efficiency and biodegradation rate of the bacterial consortia.

Anaerobic digestion (AD) effluent, or biogas slurry, contains high concentrations of nitrogen and phosphorus that require further treatment prior to discharge. Simultaneously, sustainable aviation fuel (SAF) production is limited by the availability of suitable lipid feedstocks. In this study, an integrated strategy combining biogas slurry remediation with microalgae-derived biofuel production was developed. Microalgal strains were screened from wastewater-associated environments based on their tolerance and nutrient removal performance in real biogas slurry. Among the isolates, Chlorella vulgaris exhibited superior adaptability and efficient removal of total nitrogen (TN), total phosphorus (TP), and chemical oxygen demand (COD). The harvested biomass was subsequently subjected to lipid extraction and catalytic hydrogenation to produce biodiesel and bio-aviation fuel. GC-MS analysis revealed that hydrotreated microalgae oil predominantly consisted of C16-C18 hydrocarbons, consistent with the compositional requirements of aviation fuels. Physicochemical characterization demonstrated that key fuel properties satisfy relevant ASTM specifications. The results confirm the feasibility of coupling wastewater treatment with high-value fuel production, enabling simultaneous pollutant removal, nutrient recovery, and biomass valorization. This work provides a sustainable waste-to-resource pathway, highlighting the potential of microalgae-based biorefineries for integrated environmental remediation and SAF feedstock generation.

Petroleum-based plastics are non-renewable and degrade poorly, persisting in the environment and causing serious ecological pollution, so urgent development of alternatives is needed. In this study, all-bamboo fiber thermosetting plastics (BTPs) were successfully prepared through selective sodium periodate oxidation of bamboo fibers followed by hot-pressing. The results demonstrate that the oxidation treatment effectively enhanced fiber reactivity and facilitated the formation of dense composite materials during hot-pressing. Compared with petroleum-based plastics (e.g., PVC), BTPs exhibit outstanding mechanical properties: flexural strength reaches 100.73 MPa, tensile strength reaches 83.31 MPa, while the 72 h water absorption and thickness swelling rates are as low as 5.36% and 4.59%, respectively. This study also reveals the mechanism by which residual lignin affects material microstructure formation through competitive oxidation reactions. Although it imparts initial hydrophobicity, it hinders complete fiber activation, leading to the formation of micro-defects. Furthermore, BTPs can completely degrade in 1% NaOH solution within 24 h, demonstrating excellent degradability. This research provides a new strategy for developing high-performance, degradable all-bamboo-based materials and promotes the value-added utilization of bamboo resources.