摘要
以某电路板生产企业硝化系统崩溃后的物化出水为研究对象,采用气相色谱-质谱(GC-MS)对物化出水成分进行了分析,解析了硝化系统崩溃的原因,同时采用活性炭吸附、Fenton强化和活性污泥回流3种预处理方法结合生物增效剂重建硝化系统。结果表明:物化出水中含有的硫脲和其他苯酚类硝化抑制物是导致硝化系统崩溃的主要原因;投加生物增效剂并结合剩余污泥回流点切换的方式,可快速地重新建立硝化系统,使氨氮含量降低至0.41 mg·L-1,去除率达到98.9%。工程实践结果表明,将此方法应用于电路板生产企业硝化系统,在15 d内将A/O生化系统的氨氮的去除率从-20%~20%提升至90%~95%。以上结果为电路板生产废水生产企业污水处理系统硝化系统重建提供一种经济、可行的方法。
Physicochemical effluent from the breakdown of nitrification system in an electroplating enterprise in Jiangsu province was taken as an object,its composition was analyzed by GC-MS to analyze the cause of the breakdown of nitrification system.At the same tim e,the nitrification system was rebuilt by the combination of three pretreatm ent methods including activated carbon adsorption,Fenton enhancem ent and activated sludge reflux,and biological synergist.The results showed that the nitrification inhibitors of thiourea and other phenol compounds were identified,which the main reason for the breakdown of nitrification system.By adding biological synergist and changing the sludge reflux mode of biochemical system,the nitrification system could be quickly rebuilt,which resulted in the decrease of ammonia nitrogen content to 0.41 m g*L-1 and its corresponding removal rate of 98.9%.The engineering practice shows that the rem oval rate of ammonia nitrogen in the A/O biochemical system increased from-20%〜20%to 90%〜95%within 15 days when this method was applied in the nitrification system of the electroplating enterprise.It provides a more effective and economical way for the nitrification system reconstruction in the wastewater treatment system of electroplating wastewater production enterprises.
作者
邓敬轩
黄振兴
单晓红
阮文权
DENG Jingxuan;HUANG Zhenxing;SHAN Xiaohong;RUAN Wenquan(School of Environment and Civil Engineering,Jiangnan University,Wuxi 214122,China;Wuxi Masun Environmental Energy Technology Co.Ltd.,Wuxi 214122,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2020年第6期1488-1494,共7页
Chinese Journal of Environmental Engineering
基金
国家水体污染控制与治理科技重大专项(2017ZX07204002)。
关键词
电子电路板生产废水
硝化系统
生物增效菌剂
氨氮去除
electroplating wastew ater
nitrification system
biological synergistic agent
ammonia nitrogen removal
