摘要
采用逐步提高进水中实际废水比例的驯化方法,研究SBR中好氧颗粒污泥(AGS)对化工废水的处理效果及稳定性维持。首先以模拟污水为进水,逐步增加进水中实际废水的比例(以COD贡献值计),35 d时实际废水的比例达到100%,44 d时驯化出高适应性的AGS。虽然驯化过程中AGS的稳定性受到一定冲击,导致MLSS、EPS、粒径分布等出现波动,但好氧颗粒化与解体的动态平衡并未被打破,AGS始终维持着颗粒状结构。44 d时AGS的SVI及SV_(30)/SV_5分别为34.71 m L/g及0.95,MLSS及MLVSS/MLSS分别为7 234 mg/L及0.47,平均粒径及颗粒化率分别为2.81 mm及96.5%,EPS及PN/PS分别为30.66 mg/g MLVSS及1.82,含水率为96%。驯化过程中反应器对污染物的去除率波动较大,特别是进水水质改变时出水浓度会突然升高。但随着AGS逐渐适应实际废水水质,反应器对COD、TIN及TP的去除率最终均升至90%以上。可见,AGS的独特结构能够较好地实现对该化工废水的无害化处理。
The domestication method of gradually increasing the proportion of real wastewater in the influent was used to investigate the degradation of chemical wastewater by aerobic granular sludge （AGS） in SBR and the stability maintenance. Simulated wastewater was firstly filled into the reactor, and then, the proportion （calculated by COD contribution value） of real wastewater was gradually in- creased. The proportion of real wastewater reached 100% on the 35th day, and the adaptable AGS was domesticated on the 44th day. Although the stability of the AGS was struck during the domestication peri- od, which led to fluctuation of MLSS, EPS, particle size distribution and so on, but the dynamic equilib- rium between aerobic granulation and disintegration was not disturbed, and the granular structure was al- ways maintained. SVI and SV30/SV5 of AGS on the 44th day were 34.71 mL/g and 0.95, MLSS and MLVSS/MLSS were 7 234 mg/L and 0.47, average particle size and granulation rate were 2.81 mm and 96.5%, EPS and PN/PS were 30.66 mg/gMLVSS and 1.82, and water content was 96%, respectively. Performance of the reactor in the removal of the pollutants also fluctuated during the domestication period, and pollutants in the effluent would increase suddenly especially when the composition of the influent changed. However, the removal rates of COD, TIN, and TP finally reached more than 90% as the AGS gradually adapted to the real wastewater. The results indicated that the unique structure of AGS was capa- ble for the treatment of chemical wastewater.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第5期26-32,共7页
China Water & Wastewater
基金
江西省教育厅科技项目(GJJ150627)
国家自然科学基金资助项目(21467009)
关键词
好氧颗粒污泥
化工废水
驯化
稳定性
aerobic granular sludge
chemical wastewater
domestication
stability
