College of Chemistry and Molecular Engineering/Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, PR China.
Environ Technol. 2013 Sep-Oct;34(17-20):2773-9. doi: 10.1080/09593330.2013.788074.
The objective of this study was to enhance removal of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) from domestic sewage in a sequencing batch reactor with added new materials. A modified anoxic/anaerobic/oxic (MAAO) process, integrating a micro-electrolysis (ME) bed in an anoxic tank, and complex biological media (CBM) in anoxic, anaerobic and oxic tanks to treat domestic sewage, and their performances were investigated. The MAAO system was operated at controlled hydraulic retention time (HRT) of 8 h and mixed liquor recirculation (MLR) at 75%. The results showed that the MAAO system could effectively remove COD, TN and TP with average rates of 93%, 80% and 94%, respectively, in March, and 94%, 76% and 91%, respectively, in August. In this system, TP was primarily removed from the anoxic tank regardless of the operational conditions; removal contribution ratios to TP of the anoxic tank reached 56% both in March and August, indicating that the ME bed can effectively enhance phosphorus removal. TN was primarily removed from the anoxic and anaerobic tanks; removal contribution ratios to TN of anoxic and anaerobic tanks reached 36-38% and 37-38%, respectively. The oxic tank had the highest share of COD removal (56% both in March and August) in the removal of phosphorus. The outflow concentrations of COD, TN and TP were 3-46, 7-14 and 0.3-0.5 mg/L, respectively, in March, and 26-49, 9-15 and 0.04-0.1 mg/L, respectively, in August. COD and TN removal performances indicated that the innovative materials of the ME bed and CBM can effectively enhance COD and TN removal.
本研究的目的是在序批式反应器中添加新材料来提高生活污水的化学需氧量（COD）、总氮（TN）和总磷（TP）的去除率。采用一种改良的缺氧/厌氧/好氧（MAAO）工艺，在缺氧池中集成微电解（ME）床，在缺氧、厌氧和好氧池中集成复合生物介质（CBM）来处理生活污水，并对其性能进行了研究。MAAO 系统的水力停留时间（HRT）控制在 8 h，混合液回流比（MLR）为 75%。结果表明，MAAO 系统在 3 月和 8 月分别以平均去除率 93%、80%和 94%有效地去除 COD、TN 和 TP；在该系统中，TP 主要在缺氧池中被去除，与操作条件无关；在 3 月和 8 月，缺氧池对 TP 的去除贡献比分别达到 56%，表明 ME 床可以有效地增强除磷效果。TN 主要在缺氧和厌氧池中被去除，缺氧池和厌氧池对 TN 的去除贡献比分别达到 36-38%和 37-38%。好氧池对磷的去除贡献比最高（3 月和 8 月均为 56%）。在 3 月和 8 月，出水 COD、TN 和 TP 的浓度分别为 3-46、7-14 和 0.3-0.5 mg/L，26-49、9-15 和 0.04-0.1 mg/L。COD 和 TN 的去除效果表明，ME 床和 CBM 的创新材料可有效增强 COD 和 TN 的去除。
