Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 246, Issue -, Pages 355-361Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2019.06.011
Keywords
Nutrient; Nitrogen; Phosphorus; Biochar; Constructed wetland; Microbial community
Categories
Funding
- Program of Xinmiao Talents in Zhejiang Province [2017R411014]
- College Students' Science and Technology Innovation Project of Zhejiang Ocean University
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A novel composite biochar (NCB) was produced from the pyrolysis of co-fermentation products of sewage sludge, food wastes and rice straw, and exhibited higher nitrogen and phosphorus adsorption capacity due to the larger surface area (14.7 m(2) g(-1)) and higher Ca content (51753.7 mg kg(-1)) than single rice straw biochar. The addition of NCB was then investigated in a non-aerated vertical baffled flow constructed wetland (VBFCW) for contaminated water treatment. The VBFCW with NCB addition significantly improved CODMn, NH4+-N, TN and TP removal efficiencies of 83.3 +/- 5.3%, 95.9 +/- 3.4%, 28.0 +/- 4.0% and 59.5 +/- 11.8%, respectively, at a hydraulic retention time (HRT) of 3 d. In addition, the TN and TP removal rates at a decreased HRT of 2 d were much higher than those at an HRT of 3 d without NCB addition. The presence of NCB in the VBFCW system enhanced nutrient adsorption and improved the enrichment of bacteria for organic and nitrogen removal mainly including the genera Bacillns and Lactococcus.
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