聚丙烯酸酯浆料废水处理中试研究

Pilot study on treatment of polyacrylate sizing wastewater

针对聚丙烯酸酯浆料废水高浓度难降解以及成分单一等特点,采用基于共代谢的厌氧-好氧专利反应器组合工艺的生物处理方法对其进行中试试验,重点考察反应器的启动运行特征以及反应器的性能。试验结果表明:基于提高聚酯废水占比的启动方式,该系统启动周期约为30 d;在进水化学需氧量(COD)质量浓度为1 600 mg/L时,厌氧段水力停留时间为41. 7 h,中温为(35±3)℃;在好氧段溶解氧质量浓度为3. 5 mg/L的工况下,该系统对COD平均去除率为95. 2%,最终出水各项主要指标均达到纺织染整工业水污染物排放标准,且该系统具有较强的耐负荷冲击能力。

In view of the characteristics of polyacrylate wastewater,such as high concentration,hard degradation and single component,a biological treatment method adopting an anaerobic-aerobic reactor based on co-metabolism was studied,focusing on the startup operating of and the performance of the reactor.The results show that the system operating cycle is about 30d on the basis of increasing the ratio of polyester wastewater.Besides,under the conditions of concentration of chemical oxygen demand(COD)1600 mg/L,hydraulic residence time(HRT)of 41.7h,temperature of(35±3)℃and concentration of dissolved orygen(DO)3.5mg/L,the average removal rate of COD is 95.2%.The main indexes of the final effluent reaches the water pollutant emission standard of textile dyeing and finishing industry.It is also proved that the system has strong load impact resistance.