SBR系统中同步硝化反硝化好氧颗粒污泥的培养

采用人工配制的模拟生活污水,研究序批式反应器(SBR)中好氧颗粒污泥的培养.实验结果表明:通过对进水碳源进行调控,反应器中形成了高活性具有同步硝化反硝化能力的好氧颗粒污泥,反应器中COD和NH₃-N的去除率分别为74.0%～92.8%和82.3%～98.5%.颗粒污泥的粒径一般为0.5～1.0mm,MLSS达到4.5g·L^-1以上,SVI值约为32.5,其有效生物量及脱氮性能远远高于一般的好氧活性污泥.

Cultivation of Aerobic Granular Sludge for Simultaneous Nitrification and Denitrification in SBR System

The cultivation of aerobic granular sludge used for nitrogen removal in Sequencing Batch Reactor (SBR) fed with a synthetic municipal wastewater was investigated. The results showed that the aerobic granular sludge with the high activity of simultaneous nitrification and denitrification, could form in the reactor by controlling the addition of carbon source, and the removal rates of COD and NH3-N reached 74.0%-92.8% and 82.3%-98.5%, respectively, in the reactor. The granular formed was averagely 0.5-1.0 mm in diameter, and the Mixed Liquid Suspended Solids (MLSS) and the Sludge Volumetric Index (SVI) in the reactor were above 4.5 g/L and above 32.5, respectively. Compared with the normal aerobic activated sludge process, the system with aerobic granular sludge had a higher concentration of effective biomass and a much stronger ability of nitrogen removal.