两段式旋转生物接触器处理城市污水中的有机物和氮去除

Organic and nitrogen removal in a two-stage rotating biological contactor treating municipal wastewater.

作者信息

Hiras Demetrios N, Manariotis Ioannis D, Grigoropoulos Sotirios G

机构信息

Environmental Engineering Laboratory, Department of Civil Engineering, University of Patras, Patras GR-265 00, Greece.

出版信息

Bioresour Technol. 2004 May;93(1):91-8. doi: 10.1016/j.biortech.2003.06.005.

DOI:10.1016/j.biortech.2003.06.005

PMID:14987726

Abstract

A laboratory scale rotating biological contactor (RBC) predenitrification system incorporating anoxic and aerobic units was evaluated for the treatment of settled high-strength municipal wastewater. The system was operated under four recycle ratios (1, 2, 3 and 4) and loading rates of 38-182 gCOD/m(2)d and 0.22-14 gOxid-N/m(2)d on the anoxic unit and 3.4-18 gCOD/m(2)d and 0.24-1.8 gNH(4)-N/m(2)d on the aerobic. The average removal efficiency in terms of chemical oxygen demand (COD), biochemical oxygen demand (BOD(5)), total suspended solids (TSS) and total nitrogen (Total-N) was 82%, 86%, 63% and 54%; settling of the RBC effluent increased COD and TSS removal to 94% and 97%. An increase in hydraulic loading resulting from higher recirculation, had limited negative effect on organic removal but improved nitrogen removal, and in terms of Total-N removal efficiency increased up to a ratio of 3 and then decreased.

摘要

对一个包含缺氧和好氧单元的实验室规模的旋转生物接触器（RBC）前置反硝化系统进行了评估，以处理沉淀后的高强度城市废水。该系统在四个循环比（1、2、3和4）下运行，缺氧单元的负荷率为38 - 182 gCOD/m²d和0.22 - 14 g氧化态氮/m²d，好氧单元的负荷率为3.4 - 18 gCOD/m²d和0.24 - 1.8 gNH₄-N/m²d。化学需氧量（COD）、生化需氧量（BOD₅）、总悬浮固体（TSS）和总氮（Total-N）的平均去除效率分别为82%、86%、63%和54%；RBC流出物的沉淀使COD和TSS去除率提高到94%和97%。较高的再循环导致水力负荷增加，对有机物去除的负面影响有限，但改善了氮去除，就总氮去除效率而言，在循环比为3时达到最高，然后下降。