运行模式对AMBR处理高浓度污水的影响

Influence of Hydraulic Operation Modes on Removal Effect of High- concentration Sewage in AMBR

采用AMBR处理模拟高浓度污水(COD=3 000 mg/L),分别采用"8+4"、"7+5"、"9+3"3种进水模式,每种进水模式下均设置3种水力停留时间(24、16、12 h),考察不同运行模式对AMBR处理效果的影响。结果表明,当进水模式为"8+4"、水力停留时间为24 h时,AMBR对污水的处理效果最好,对COD的平均去除率为88%,出水SS平均为0.15 mg/L,出水pH值在7.0左右。在"9+3"进水模式下,反应器两端格室没有足够的缓冲时间来降解有机物;在"7+5"进水模式下,缓冲阶段大量有机质进入中间格室,导致后面格室的处理负荷增大。

Anaerobic migrating blanket reactor （AMBR） was used to treat synthetic high-concen- tration sewage （COD =3 000 mg/L）. Three kinds of influent modes （＂8 ＋4＂ ,＂7 ＋5＂ and ＂9 ＋3＂） were adopted, and each mode was accompanied by hydraulic retention times （HRT） of 24 h, 16 h and 12 h. The influence of different operation modes on treatment efficiency of AMBR was investigated. The results showed that under the ＂8 ＋ 4＂ mode and HRT of 24 h, the best treatment efficiency of AMBR was achieved with an average COD removal rate of 88%, an average effluent SS of 0.15 mg/L and an effluent pH of about 7.0. There was not enough buffer time for degrading organic matter in the compartments at both sides of the reactor under the ＂9 ＋ 3＂ mode. In buffer stage of the ＂7 ＋ 5＂ mode a lot of organic matter flowed into the middle compartments, which increased the treatment load in the following compartments.