污泥回流比对双污泥BCR反硝化除磷效果的影响

发布时间：2018-08-09 17:58

【摘要】：以模拟华南地区的城镇污水为研究对象,开展了污泥回流比对连续流双污泥生物澄清反应器(BCR)反硝化除磷的影响研究.结果表明:超越污泥和回流污泥的回流比分别控制为0.6、0.4和0.2时,BCR工艺对COD_(Cr)去除率的均值分别为89.98%、89.48%和82.38%,出水COD_(Cr)质量浓度平均为20.94、21.67、37.66 mg/L;而总氮的去除率均值则分别为79.94%、80.58%和65.47%,出水总氮质量浓度平均为5.72、5.75、10.85 mg/L;总磷去除率的均值分别为88.81%、91.64%和77.06%,出水总磷质量浓度均值为0.76、0.59、1.62 mg/L,新工艺改善了传统双污泥连续流工艺出水NH_4~+-N质量浓度偏高的缺陷.工艺在超越污泥回流比和回流污泥回流比均是0.4时处理效果最佳.由于好氧硝化池与中沉池合建,好氧硝化池中的NO_3~--N与中沉池中的DPB接触,发生反硝化吸磷的反应,使部分总磷在好氧硝化池中被去除.
[Abstract]:The effect of sludge reflux ratio on denitrifying phosphorus removal by (BCR) bioreactor was studied. The results showed that the average removal rate of COD _ (Cr) was 89.98% and 82.38%, respectively. The average mass concentration of COD _ (Cr) in effluent was 20.9421.67 ~ 37.66 mg / L, and the average removal rate of total nitrogen was 79.94 ~ 80.58%, respectively, when the reflux ratio of excess sludge and reflux sludge was controlled as 0.6% and 0.2%, respectively, and the mean value of COD _ (Cr) removal efficiency was 89.98% and 82.38%, respectively. The average mass concentration of COD _ (Cr) in effluent was 20.944 卤21.67 mg / L and the average removal rate of total nitrogen was 79.940.58%, respectively. And 65.47, the average total nitrogen concentration of effluent was 5.72 ~ 5.75 ~ 10.85 mg / L, the average removal rate of total phosphorus was 88.81% 91.64% and 77.06%, respectively, and the mean value of effluent total phosphorus concentration was 0.760.59 mg / L, 1.62 mg / L respectively. The new process improved the defect of high NH _ 4-N mass concentration in the effluent of traditional two-sludge continuous flow process. The best treatment effect is when the ratio of sludge reflux and reflux sludge is 0.4. Because of the joint construction of aerobic nitrification tank and intermediate settling tank, the NO_3~--N in aerobic nitrification tank was in contact with DPB in the settling tank, and denitrifying phosphorus absorption reaction took place, which resulted in the removal of some total phosphorus in aerobic nitrification tank.
【作者单位】：广州大学土木工程学院;
【基金】：国家自然科学基金项目(51278133,21477027) 广东省科技计划项目(2014a020216049) 广州市教育系统创新团队项目(13C01)
【分类号】：X703.1

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