水解与颗粒污泥膨胀床串联工艺处理城市污水

Hydrolysis Upflow Sludge Bed (HUSB)-Expanded Granular Sludge Blanket(EGSB) process for Municipal wastewater treatment

提出了常温下水解（ＨＵＳＢ）和颗粒污泥（ＥＧＳＢ）反应器串联处理城市生活污水的新工艺以提高悬浮性和溶解性ＣＯＤ的去除率。在Ｔ＞１５℃和Ｔ＝１２℃条件下，工艺可分别达到７０％总ＣＯＤ、８５％ＳＳ的去除率和６０％总ＣＯＤ、７７％ＳＳ的去除率。ＨＵＳＢ反应器的水力停留时间是３ｈ，用于预处理去除ＳＳ和提高出水ＣＯＤ的溶解性和可生化性，其ＳＳ、悬浮性ＣＯＤ的去除率分别为８６％和６６％，并超过５０％的污泥水解率。在Ｔ＝８～１２℃时，ＥＧＳＢ反应器的水力停留时间是２ｈ，可获得６０％总ＣＯＤ去除率和２３～７０Ｌ／ｍ３污水的沼气产量。

A new anaerobic treatment process which aims at reducing the effuent suspended solids (SS) and soluble organic matter is presented. Consisting of HUSB and EGSB reactors in series,the process can remove 70% of COD and 85% of SS at temperature higher than 15℃;and 60% of COD,77% of SS at temperature of 12℃.HUSB reactor is used for pretreatment-removing SS,raising the offluent dissolved COD and biodegradability. The removal officiency of SS is 86% and that of suspended GOD is 66% at hydraulic retention time of 3.0h,and more than 50% of sludge hydrolysis is obtained. At ambient temperature (8～12℃), EGSB reactor can remove 60% of COD and produce the biogas amounting to 23～70L/m 3 wastewater at hydraulic retention time of 2.0h.