不同碳源对餐厨废水短程硝化反硝化处理效果的影响研究  

EFFECT OF DIFFERENT CARBON SOURCES ON SHORT-CUT NITRIFICATION AND DENITRIFICATION TREATMENT EFFICIENCY FOR FOOD WASTEWATER

作　　者：张周[1,2] 赵明星 阮文权[1,2] ZHANG Zhou;ZHAO Ming-xing;RUAN Wen-quart(School of Environmental and Civil Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Anaerobic Biotechnology,Wuxi 214122,China)

机构地区：[1]江南大学环境与土木工程学院,江苏无锡214122 [2]江苏省厌氧生物技术重点实验室,江苏无锡214122

出　　处：《环境工程》2018年第7期46-50,共5页Environmental Engineering

基　　金：国家科技支撑计划(2012BAC18B01-2);江苏省科技支撑计划(BK20130126)

摘　　要：针对餐厨废水短程硝化反硝化深度脱氮处理工艺存在的碳源不足,TN去除率较低等问题,通过比较甲醇、生物柴油车间生产废水和餐厨废水原液3种不同外加碳源对系统处理效果的影响,探索低C/N餐厨废水的高效脱氮模式。对比实验结果发现:添加3种外加碳源对系统出水COD、NH_4^+-N浓度影响不大,平均去除率分别为93.2%和98.2%。其中,缩短餐厨原水水解酸化时间,系统出水COD浓度上升,去除率下降。除甲醇外,投加另外2种碳源都会导致出水TN浓度上升,对系统造成一定影响。投加不同碳源对系统其他各单元运行效果基本相同,废水经过缺氧区后COD、TN和NH_4^+-N浓度有明显下降,出水满足纳管标准。3种外加碳源对工艺脱氮效果提高的影响排列顺序为甲醇>生物柴油生产废水>餐厨废水原液。The short-cut nitrification and denitrification treatment process for food wastewater had problems including insufficient carbon source and low TN removal rate. The enhancing effect of three kinds of carbon sources including methanol and biodiesel workshop production wastewater and food wastewater on the treatment efficiency of food wastewater were evaluated namely,to explore the efficient denitrification mode for low C/N food wastewater. Comparative experimental results showed that,the addition of three kinds of carbon sources had little effect on the effluent COD and NH4＋-N concentration,and their average removal rates were 93. 2% and 98. 2%. By reducing the hydrolysis time of the food wastewater,the system effluent COD increased,and its removal rate decreased. In addition to methanol,the addition of two other carbon sources would lead to increase of effluent TN concentration,which had certain effect on the system. Different carbon sources had the same effect on the other units of the system. The concentrations of COD,TN and NH4＋-N all decreased significantly after the wastewater passed the anoxic zone,and the effluent met the dischange standard. Methanol was proved to have the best nitrogen removal effect among the three carbon sources,followed by biodiesel production wastewater,and food wastewater.

关 键 词：碳源 餐厨废水 低C/N 短程硝化 

分 类 号：X799.3[环境科学与工程—环境工程]