摘要
以污泥发酵液为试验用水,比较化学沉淀法和电解法对氨氮和磷的去除效果。结果表明,化学沉淀法的反应速率很快,1 min内即可达到反应终点;当p H值为10、P/N值为1.13、Mg/P值为1.00时,COD保持率为78%,对氨氮的去除率超过80%,对磷的去除率在90%以上。电解法中,当电流为70 m A、反应时间为3 h时,COD保持率为66%,对氨氮的去除率为26%,对磷的去除率为73%。综合比较对氨氮和磷的去除率、COD保持率及经济成本发现,化学沉淀法具有明显优势。
Two methods, namely chemical precipitation and electrolysis, were used to remove am- monia and phosphorus from liquid of sludge alkaline fermentation system. The experimental result showed as follows： the chemical reaction completed quickly within I rain. The conservation efficiency of COD was 78% , the removal efficiency of ammonia and phosphorus was over 80% and 90% , respectively, as P/N - 1.13 ,Mg/P = 1.00, and pH = 10. In the electrolytic process, using electric current of 70 mA and reaction time of 3 h, the conservation efficiency of COD was about 66% , removal efficiency of ammonia and phosphorus was 26% and 73% , respectively. Considering the efficiency of nitrogen and phosphorus removal and the percentage of COD remaining, in addition to costs, the chemical precipitation outper- formed the electrolytic method.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第5期112-115,共4页
China Water & Wastewater
基金
中央高校基金资助基础研究项目(310829151074)
关键词
碱性发酵污泥
NH4+
磷
磷酸铵镁
电解法
化学沉淀法
alkaline sludge fermentation
NH4＋
phosphorus
magnesium ammonium phos-phate
electrolytic method
chemical precipitation
