摘要
研究了低溶解氧(DO)下,在SBR和CSTR反应器内实现短程硝化的条件及其污泥性状的变化。试验结果表明,当SBR进水氨氮浓度为260mg/L时,氨氧化期间反应器内DO接近零,出水中亚硝酸盐氮占到亚硝酸盐氮和硝酸盐氮总和的80%以上,污泥沉降性能良好(SVI<100mL/g);当CSTR的DO为0.2～0.3mg/L、SRT≤30d时实现了亚硝酸的积累,但运行50d后发生了污泥膨胀,导致污泥流失,硝化效率下降。
Study was made on the conditions in which short-cut nitrification was achieved and on the variation of sludge characteristics at low DO in SBR and CSTR.It was showed that in SBR,when influent ammonia nitrogen is 260 mg/L and DO approaches to zero during ammonia oxidation,nitrite nitrogen in effluent amounts to over 80% of the sum of nitrate nitrogen and nitrite nitrogen,with good sludge settleability (SVI<100 mL/g).In CSTR,when DO is 0.2～0.3 mg/L and SRT≤30 d,nitrite accumulation occurs.However,after operation of 50 d,sludge bulking takes place,which leads to loss of sludge and reduction of nitrification efficiency.
出处
《中国给水排水》
CAS
CSCD
北大核心
2003年第7期1-4,共4页
China Water & Wastewater
基金
国家自然科学基金重点资助项目(50138020)
