摘要
通过分别提高精对苯二甲酸(PTA)生产废水中不同组分的含量,考察了高温-中温两级厌氧系统对4种PTA废水水质的适应情况。研究结果表明,当苯甲酸、乙酸以及对苯二甲酸含量增加时,废水经过温度两级厌氧系统处理,有机物依然能得到高效稳定的去除,且处理后的出水COD含量低于100 mg·L^(-1),COD去除率则稳定在95%以上。而对甲基苯甲酸含量的提升则对系统的运行效果影响显著,经过两级厌氧处理,依然有约25%的对甲基苯甲酸未被降解。说明在PTA废水的厌氧处理中,对甲基苯甲酸的降解是提升系统总有机物去除效率的关键,也是我们今后研究工作的重点。
In this study,we investigated the operation effects of thermophilic-mesophilic staged anaerobic system in treating four different purified terephthalic acid wastewater by changing the organic composition content.The results revealed that all the organics could still be high-efficiently removed when the concentration of benzoate,acetate and terephthalic acid increased.The COD in effluent was as low as 100 mg·L^-1,while the COD removal efficiency was stabled at over 95%.However,the increase of p-toluic acid concentration made an obvious influence on the overall operation,there was still 25% p-toluic acid left in the effluent after system treatment.Therefore,the degradation of p-toluic acid was believed one of the most critical factor for the promotion of overall organics removal efficiency,which will also be our emphasis to solve in the following research.
出处
《环境工程学报》
CAS
CSCD
北大核心
2018年第2期482-487,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51478138)
国家高技术研究发展计划(863)项目(2012AA063503)
