This study employed a novel and environment-friendly biopolymer/oxidant catalytic system, viz., poly(3-hydroxybutyrate)/peroxymonosulfate (PHB/PMS), for pretreating wastewater sludge for the first time. Under optimal conditions, i.e., 3.1 × 10 M of PMS and 3.3 g/L of PHB at pH = 6.0, the PAHs in the sludge matrix was decreased by 79 % in 12 h. Increase in salinity (75 % synthetic seawater) achieved 83 % of PAHs degradation. Functional groups (CO) of the biopolymer matrix were active centers for biopolymer-mediated electron transfer that produced reactive oxygen species (SO, HO, and O) for adsorption and catalytic oxidation of PAHs in the sludge. Functional metagenomic analysis revealed the main genus, Conexibacter (phylum, Actinobacteria) exhibited PAH-degrading function with high efficiency in the biodegradation of PAHs from sludge pretreated with PHB/PMS. Coupling chemical oxidation and biostimulation using bacterial polymer-based biomaterials is effective and beneficial for pretreating wastewater sludge toward circular bioeconomy.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.biortech.2022.127680 | DOI Listing |
Int J Mol Sci
December 2024
Department of Microbiology, Faculty of Pharmaceutical Sciences, Medical University of Silesia, Jagiellońska 4, 41-200 Sosnowiec, Poland.
The presented study investigated the possibility of using the MC5 strain, isolated from raw sewage by the enrichment culture method, in the bioremediation of soil contaminated with selected NSAIDs, i.e., ibuprofen (IBF), diclofenac (DCF), and naproxen (NPX), using the bioaugmentation technique.
View Article and Find Full Text PDFEnviron Pollut
January 2025
College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
Sludge landfilling is widely used in China, accounting for approximately 65% of total sludge disposal, due to its simplicity and cost-effectiveness. However, with increasing land scarcity and stricter environmental regulations, the Chinese government has emphasized reducing sludge landfilling. Despite these efforts, sludge historically disposed of in landfills continues to pose risks, including heavy metal leaching and contamination of groundwater and soil.
View Article and Find Full Text PDFHuan Jing Ke Xue
January 2025
School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou 310023, China.
Compared to the laboratory preparation of biochar, there is less research on the adsorption of antibiotics by industrial production of biochar in water. In this study, three types of industrial production biochar (peanut shell biochar, sludge biochar, and perishable waste biochar) were selected, and their adsorption performance for tetracycline in composite-polluted water was systematically studied. The results indicated that the Freundlich equation could well fit the adsorption isotherms of the three types of biochar for tetracycline.
View Article and Find Full Text PDFPeerJ
December 2024
Department of Chemistry, University of Trnava, Trnava, Slovakia.
Bioresour Technol
February 2025
Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Technology, Hainan University, 58 Renmin Avenue, Meilan District, Haikou 570228, China. Electronic address:
Anthraquinone-2,6-disulfonate (AQDS) and activated carbon (AC) were employed as exogenous electron shuttles (ESs) for enhancing the performance of an integrated simultaneous methanogenesis, Feammox, and denitrification (SMFD) system treating fish sludge. The addition of AQDS and AC led to an increased total nitrogen removal efficiency by 30.2 % and 66.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!