Effect of asparagine, corncob biochar and Fe(II) on anaerobic biological treatment under low temperature: Enhanced performance and microbial community dynamic
Journal of Environmental Management, ISSN: 0301-4797, Vol: 317, Page: 115348
2022
- 17Citations
- 12Captures
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Article Description
To ensure the efficiency of anaerobic biological treatment technology at lower temperature will expand the application of anaerobic reactor in practical industrial wastewater treatment. Through a batch experiment, asparagine, corncob biochar and Fe 2+ were selected as strengthening measures to analyze the effects on the anaerobic sludge characteristics, microbial community and functional genes in the low temperature (15 °C). Results showed that after 21 days, asparagine began to promote chemical oxygen demand (COD) removal by the anaerobic treatment, with highest COD removal rate (81.65%) observed when the asparagine concentration was 1 mmol/L. When adding 3 g biochar, 25 mg/L Fe 2+, and the combination of biochar and Fe 2+, the COD removal rates reached to 82%, 92% and 97%, respectively. In the presence of asparagine, both biochar and Fe 2+ alone or in combination increased the activity of protease (16.35%–120.71%) and coenzyme F 420 (5.63%–130.2%). The relative abundance of Proteobacteria and Methanobacterium increased in the presence of biochar and Fe 2+. In addition, the KEGG results showed that the combined addition of biochar and Fe 2+ enhanced bacterial replication and repair and promoted amino acid metabolism of archaea.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0301479722009215; http://dx.doi.org/10.1016/j.jenvman.2022.115348; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85131412978&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/35660832; https://linkinghub.elsevier.com/retrieve/pii/S0301479722009215; https://dx.doi.org/10.1016/j.jenvman.2022.115348
Elsevier BV
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