摘要
以实现石化废水深度处理为目的,考察采用序批式活性污泥工艺(sequencing batch reactor,SBR)生物共代谢深度处理石化废水效果的营养及工艺运行条件。结果表明:最佳共代谢基质为淀粉,当其投加量为30mg/L、摇床转速为120 r/min、温度为25℃、MLSS为2320 mg/L时,经12 h处理后的二级出水COD下降了79.58%,臭、氨氮、BOD5等指标也有所改善。SBR的最佳工艺条件为运行周期6 h、曝气强度30 L/h、淀粉投加量30 mg/L、缺氧/好氧运行时间比例1/2。此外,生活污水可替代淀粉作为共代谢基质,剩余污泥的持续添加不会影响污染物的降解效果。因此,SBR生物共代谢工艺可实现石化废水的深度处理、生活污水的同步处理及剩余污泥的减量。
The nutritional and operational conditions of a SBR co-metabolism process were investigated in order to realize the advanced treatment of the secondary effluent of a petrochemical wastewater treatment plant. The results showed that the best co-metabolism substrate was starch. After co-metabolic degradation of 12 h,COD concentration of the secondary effluent was reduced by 79.58% and odor,ammonia nitrogen,BOD5 and other water quality indicators were also improved under the following conditions：dosage,30 mg/L;shaking speed,120 r/min;temperature,25 ℃;MLSS,2320 mg/L. The optimum operating conditions for the SBR co-metabolic process were determined to be operation period of 6 h,aeration intensity of 30 L/h,starch dosage of 30 mg/L,anoxic/aerobic time ratio of 1/2. Domestic sewage could replace starch as co-metabolism substrate. The constant addition of excess sludge didn’t affect the degradation of the pollutants and the excess sludge amount was reduced. Therefore,SBR co-metabolism process could be feasible for the advanced treatment of petrochemical wastewater,domestic wastewater treatment and excess sludge reduction.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2013年第11期2768-2772,2777,共6页
Chemical Industry and Engineering Progress
基金
吉林省科技发展计划(201101108
20130206006SF)
东北电力大学博士科研启动基金(BSJXM-201014)
国家自然科学基金(11201057)项目
关键词
石化废水
深度处理
共代谢
序批式活性污泥工艺
petrochemical wastewater
advanced treatment
co-metabolism
sequencing batch reactor（SBR）
