摘要
采用室内装置研究了腐朽木的碳源释放规律,并考察其作为碳源和反应介质的水解-反硝化生物反应器对污水中硝酸盐氮的去除效果.结果表明,腐朽木可有效地释放碳源物质,接种腐殖质组腐朽木释放COD和挥发性脂肪酸(VFA)总量分别是灭菌组的2.3倍和5倍;室温25℃±1℃,进水NO3--N浓度为30mg/L,水力停留时间为12h时,水解-反硝化反应器可获得很好的反硝化效果,保持去除率80%以上稳定运行46d后,出水硝酸盐氮逐步升高,运行过程中未发现亚硝氮累积.
In this research,COD release of rotten wood was studied and rotten wood was investigated as the sole carbon source as well as biofilm carrier to remove nitrate from wastewater in up-flow laboratory reactor.The experimental results indicated that rotten wood could release carbon source continuously.COD released of rotten wood inoculated with humus was 2.3 times higher than that of sterilized rotten wood,and VFA was 5 times.The research of denitrification was carried out at 25℃ ± 1℃,30 mg /L of initial NO 3--N concentration and 12 h of hydraulic retention time.Nitrate removal efficiency was above 80%.A time-dependent decrease in nitrate removal efficiency was observed after 46 days of operation.The results showed that rotten wood could be used as an effective carbon source for denitrification.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2010年第6期1494-1498,共5页
Environmental Science
基金
北京市自然科学基金项目(8072011)
国家高技术研究发展计划(863)项目(2007AA06Z345)
关键词
反硝化
碳源
腐朽木
农业废弃物
生物膜载体
denitrification
carbon source
rotten wood
agricultural waste
biofilm carrier
