摘要
日益严格的印染废水排放标准对污水处理工艺提出更高要求,针对传统工艺的改进提升成为当前重要研究内容。以处理效果更佳的两级“Fe/C微电解联合Fenton氧化”-混凝沉淀作为改进的高级氧化工艺,在此基础上提出了改进的高级氧化-水解酸化-A/O组合工艺,研究了该组合工艺对南昌市某工业园印染废水处理厂的高COD(>9000 mg/L)、高氮(>700 mg/L)印染废水的处理效果。结果表明,改进的高级氧化工艺可有效去除废水中的难降解污染物,降低废水COD及TN,其中COD去除率由50.8%提高至72.5%;水解酸化阶段可对COD进行进一步去除,并使含氮有机物通过氨化作用转化为氨氮,提高废水可生化性;A/O处理工艺可有效去除大部分NH_(4)^(+)-N和TN,其中缺氧反应阶段采用强化脱氮措施可有效强化A/O阶段对TN的去除。该组合工艺对印染废水COD、NH_(4)^(+)-N、TN去除率分别为95.8%、33.8%、93.3%,出水COD、NH_(4)^(+)-N、TN分别为413.5、34.7、48.6 mg/L,满足当地工业园区污水处理厂纳管标准。
Increasingly stringent discharge requirements put forward for higher sewage treatment efficiency of printing and dyeing wastewater.The improvement and promotion of traditional process become an important research content.In this paper,two-stage“iron-carbon micro-electrolysis combined with Fenton oxidation”-coagulation sedimentation was proposed as improved advanced oxidation process.On this basis,the combined process of improved advanced oxidation-hydrolysis acidification-A/O was used for treatment of printing and dyeing wastewater(COD>9000 mg/L,TN>700 mg/L)in an industrial park in Nanchang.The results showed that advanced oxidation unit had significant effect on the removal of refractory organic pollutants,COD and TN,and the COD removal rate was increased from 50.8%to 72.5%.The hydrolysis acidification unit realized further removal of COD,and improved the biodegradability by promoting the conversion of nitrogen-containing organic matter to ammonia nitrogen through ammoniation.The A/O unit could easily remove most of NH_(4)^(+)-N and TN.In anoxic reaction stage,enhanced nitrogen removal measures could effectively increase the denitrification effect of A/O stage.The removal rates of COD,NH_(4)^(+)-N and TN of the combined process were 95.8%,33.8%and 93.3%respectively,and the effluent COD,NH_(4)^(+)-N and TN were 413.5,34.7,48.6 mg/L respectively,which met the discharge the specified standards for discharging in the pipe of local chemical industry park.
作者
梁培瑜
沈紫飞
吴永明
吴施婧
邓觅
朱林
邓利智
LIANG Peiyu;SHEN Zifei;WU Yongming;WU Shijing;DENG Mi;ZHU lin;DENG Lizhi(Institute of Microbiology,Jiangxi Academy of Sciences,Nanchang 330096,China;Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,School of Resources Environment&Chemical Engineering,Nanchang University,Nanchang 330031,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2022年第11期107-112,共6页
Industrial Water Treatment
基金
江西省科学院省级科技计划项目包干制试点示范项目(2021YSBG10003,2021YSBG22024)
江西省科学院省级财政科研项目经费包干制试点示范项目(2022YSBG22012)。
关键词
FE/C微电解
水解酸化
A/O工艺
印染废水
Fe/C micro-electrolysis
hydrolytic acidification
A/O process
printing and dyeing wastewater
