前置A<sub>2</sub>NSBR工艺系统的启动特性研究

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Abstract

The start-up characteristics of the pre-A₂ NSBR (anaerobic/anoxic/aerobic nitrification) system were investigated to treat low C/N municipal wastewater (C/N=3.85). The start-up of the system could be quickly achieved by the strategy that the A₂ SBR and the N-SBR was first started separately then was operated jointly, the nitrification was well achieved in the N-SBR, and denitrifying phosphorus removal was realized in the A₂ SBR with the NO₃^-N as the electronic accepter. The effluent quality index of COD、NH₄⁺-N、TN、TP was 33.82mg/L、0.85mg/L、13.56mg/L、0.3mg/L, with corresponding removal efficiency was 84.31%、98.41%、76.81%、93.87%, respectively, which meet the first A discharge standard in china (GB 18918~2002) after continuous operation of 45days. FISH confirmed that PAOs was the dominant bacteria in the pre-A₂ NSBR system and accounted for 14.77% of the total bacteria.

Key words： pre-A₂ NSBR process denitrifying phosphorus removal quick start-up two-sludge system biofilm

Received: 18 January 2016

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