农业环境科学学报2024，Vol.43Issue(4)：906-915,10.DOI:10.11654/jaes.2023-0959
秸秆-钢渣混合填料对低C/N比污水脱氮研究
Nitrogen removal of wastewater with low C/N ratio by straw and steel slag mixed fillers
摘要
Abstract
To investigate the impact of crop straw and steel slag on nitrogen removal from low carbon-to-nitrogen ratio(C/N)sewage,this study employed wheat straw(W group),rice straw(R group),wheat straw + steel slag(WF group),and rice straw + steel slag(RF group)as packing materials in an anaerobic circulation system for treating sewage.The effectiveness of these six different packing systems in removing nitrate nitrogen(NO3--N)was evaluated.The results demonstrated that the NO3--N removal rates for the W,R,WF,and RF groups were 94.99%,86.70%,98.75%,and 94.70%respectively.Compared with the WF and RF groups which utilized mixed packings of straw and steel slag,the pure straw packing systems(W and R groups)exhibited higher rates of NO3--N removal but resulted in elevated concentrations of dissolved organic carbon(DOC)during the treatment process.The presence of iron-containing compounds released from the steel slag in both WF and RF groups facilitated organic matter consumption,thereby maintaining a lower DOC concentration level throughout the treatment process to prevent potential secondary pollution caused by high DOC concentration.After comprehensive consideration,the utilization of a wheat straw + steel slag mixed filler could effectively prevent secondary pollution in the process of nitrogen removal while maintaining efficient nitrogen removal,making it more suitable for practical applications in low C/N ratio sewage treatment.关键词
秸秆/钢渣/脱氮/反硝化过程Key words
straw/steel slag/nitrogen removal/denitrification process分类
环境科学引用本文复制引用
葛冠华,潘达鑫,郑勇,熊兴军,林杉,王砚,胡荣桂..秸秆-钢渣混合填料对低C/N比污水脱氮研究[J].农业环境科学学报,2024,43(4):906-915,10.基金项目
云南省科技人才与平台计划项目(202205AF150004) （202205AF150004）
中国电建集团昆明勘测设计研究院有限公司重点研发项目(KD-KJRW2023-011) （KD-KJRW2023-011）
武汉市科技计划项目(2020020601012284)Science and Technology Talents and Platform Project of Yunnan Province,China(202205AF150004) （2020020601012284）
Key Research Project of Kunming Engineering Corporation Limited of Power China(KD-KJRW2023-011) （KD-KJRW2023-011）
Science and Technology Project of Wuhan,China(2020020601012284) （2020020601012284）
