摘要
印染废水与碱减量废水因污染物组成差异显著,混合处理易引发水质波动与生物抑制。针对此问题,提出分质预处理与生化深度处理耦合工艺:采用“混凝-芬顿氧化”去除染料及助剂处理印染废水,碱减量废水通过“酸析-微电解”回收对苯二甲酸(TA);预处理后,废水经厌氧水解酸化-好氧工艺深度处理。结果表明,分质预处理阶段,印染废水COD与色度去除率分别达78.5%、96.2%,碱减量废水TA回收率为91.3%;生化阶段,系统总COD去除率提升至94.8%,污泥产率降低42%。技术经济分析显示,水处理成本为3.2元/t,TA回收收益可抵消30%运行费用。该工艺为纺织园区废水分类治理与资源化提供了创新解决方案。
Due to the significant differences in pollutant composition,the mixed treatment of printing and dyeing wastewater and alkali reduction wastewater is prone to cause fluctuations in water quality and biological inhibition.To address this issue,a coupled process of differentiated pretreatment and biochemical advanced treatment is proposed:“coagulation-Fenton oxidation”is adopted to remove dyes and auxiliaries for the treatment of printing and dyeing wastewater,and the alkali reduction wastewater is treated through“acid precipitation-micro-electrolysis”to recover terephthalic acid(TA).After pretreatment,the wastewater undergoes advanced treatment through an anaerobic hydrolysis acidification-aerobic process.The results showed that in the qualitative pretreatment stage,the removal rates of COD and color in the printing and dyeing wastewater reached 78.5%and 96.2%respectively,and the TA recovery rate of the alkali reduction wastewater was 91.3%.In the biochemical stage,the total COD removal rate of the system increased to 94.8%,and the sludge production rate decreased by 42%.Technical and economic analysis shows that the cost of treating one ton of water is 3.2 yuan per ton,and the TA recovery revenue can offset 30%of the operating costs.This process provides an innovative solution for the classification treatment and resource utilization of wastewater in textile industrial parks.
作者
林宝春
陈学勤
钟永芬
LIN Baochun;CHEN Xueqin;ZHONG Yongfen(Hangzhou Yishui Environmental Engineering Co.Ltd.,Hangzhou 311200,China)
出处
《印染助剂》
2025年第12期29-34,共6页
Textile Auxiliaries
关键词
印染废水
碱减量废水
分质预处理
对苯二甲酸(TA)
生化深度处理
printing and dyeing wastewater
alkali reduction wastewater
quality pretreatment
terephthalic acid(TA)
biochemical advanced treatment
