应急药剂联合投加处理黑臭水体试验研究

Experimental study on treatment of black and odorous water with combined emergency agents

为了研究最佳应急药剂投加方案,以某黑臭河道水体为处理对象,选取ST修复剂、PAC、硅藻土3种应急药剂,考察其对黑臭水体的处理效果,采用烧杯试验和原位模拟试验进行研究。药剂单独投加时,ST修复剂、PAC、硅藻土的最佳投加量分别为200、150、600 mg/L;水质改善效果为ST修复剂>PAC>硅藻土;对TP去除率最高,COD次之,不能有效去除氨氮。药剂联合投加时,单独投加ST修复剂与硅藻土+ST修复剂联合投加的处理效果相近;硅藻土+PAC联合投加时,两者最佳投加量分别为300、50 mg/L(最佳投加比为6∶1),TP去除率为70%,相比单独投加150 mg/L的PAC时,效果仍有提高。2种投加方案在原位模拟试验中均有效降低黑臭水体浊度,提高水体透明度,TP去除率分别为99.8%、95.6%,COD去除率分别为29.5%、28.1%。

In order to find out an optimal emergency agents addition scheme,black and odorous water from a river was taken as the treatment object,the treatment effect by three kinds of emergency agents:ST repair agent,PAC and diatomite were investigated through beaker experiment and in situ simulation experiment.It could be seen that,when adding single agent,the optimal dosage of ST repair agent,PAC and diatomite were 200,150 and 600 mg/L respectively.The water quality improving efficiency of them was in an order of ST repair agent>PAC>diatomite,the removal rate of TP was the highest,followed by COD,however,ammonia nitrogen could not be removed effectively.When adding those agents together,the treatment effect of single ST repair agent was similar to that of diatomite-ST repair agent combined addition.When dosing diatomite and PAC together,the optimal dosage of them were 300 and 50 mg/L respectively(the optimal mass ratio was 6∶1),the removal rate of TP reached 70%,which showed a better effect compared to that treated by 150 mg/L PAC alone.The results of the in situ simulation test showed that,the above two adding schemes could effectively reduce the turbidity of black and odorous water,increase water transparency,the removal rates of TP were 99.8%,95.6%respectively,the removal rates of COD were 29.5%and 28.1%respectively.