水解酸化预处理光学工业生产废水的效果研究

以水解酸化为预处理手段,利用自主设计的水解酸化柱为处理设备,处理光学工业生产废水。通过分析光学工业生产废水的水质了解到：该废水BOD5/CODCr〉0.3,可以采用生物的方法处理废水,但是考虑到BOD5/CODCr值较低,而该废水中又含有大量的高分子有机物,直接利用好氧生物降解的方法效果不明显,为提高其生物降解性能,使用水解酸化为前处理手段。通过近一个月的启动试验,水解酸化反应器出水稳定,CODCr去除率达到45%左右。以废水中CODCr去除率和酸化率为分析指标,确定水解酸化反应体系的最佳适用条件,试验结果表明：pH值为6.5～7.5,水力停留时间为8～10h时,废水CODCr去除率和酸化率较高。设定pH值为7、水力停留时间为8h的试验条件,比较进、出水BOD5/CODCr的试验结果变化可知：经水解酸化预处理后,该废水的可生化性提高了近一倍左右,水解酸化预处理效果明显,该预处理方法改善了光学工业生产废水的可生化降解性能。

Research on the pretreatment of optics wastewater by hydrolysis acidification process

Optics wastewater was pretreated by hydrolysis acidification in self-design reactor.By analyzing its water quality,the value of BOD5/CODCr was higher than 0.3,so that it could be treated by biometric methods.However,because of low value of BOD5/CODcr,the treating effect of this wastewater was not obvious.To improve treating effect,the method of hydrolysis acidification as pretreatment was used.CODcr removal efficiency and acidification were analyzed.Experiment results show that CODcr removal efficiency and acidification reached highest when pH is 6.5～7.5 and hydraulic retention time was 8～10 h.The change of BOD5/CODcr between influent and effluent indicate that the effect of hydrolysis acidification as pretreatment was obvious efficient and improved wastewater biodegradability.