单质硫颗粒尺寸及反应器类型对硫自养反硝化反应器启动的影响

Effect of Element Sulfur Particle Size and Type of the Reactor on Start-up of Sulfur-based Autotrophic Denitrification Reactor

室温下(19~24℃),采用硫自养反硝化生物膜反应器和厌氧污泥反应器,接种厌氧活性污泥,研究了反应器类型和单质硫尺寸对硫自养反硝化反应器启动的影响.结果表明,生物膜反应器经过65 d运行后获得稳定的脱氮效能,在进水NO^-_3-N浓度为150 mg·L^(-1),HRT为3.3 h,NO^-_3-N去除率为91%,TN去除率为77%,TN去除速率为0.67~0.83 kg·(m3·d)^(-1).对于厌氧污泥反应器,随着进水NO^-_3-N负荷的提高,污泥产气量的增加导致了污泥上浮.在进水NO^-_3-N浓度为185 mg·L^(-1),HRT为3.3 h的条件下,获得最大去除速率1.1 kg·(m3·d)^(-1),但是出水NO^-_3-N浓度的增加导致出水水质恶化,且污泥上浮严重影响了反应器的稳定运行.分别采用0.8 mm、3.0 mm的单质硫颗粒作为反应器启动的电子供体,于批试反应器中进行试验.试验结果表明,采用0.8 mm的单质硫颗粒能够获得较高的NO^-_3-N、TN去除率,出水NO^-_2-N浓度也明显低于采用3.0 mm的单质硫颗粒作为电子供体的反应器.

The effect of element sulfur particle size and type of the reactor on sulfur autotrophic denitrification reactor start-up was researched at room temperature（19-24℃） by using sulfur autotrophic denitrification bio-membrane reactor and anaerobic sludge bed biofilm reactor and inoculating anaerobic sludge. The research indicated that after 65 d operation, the bio-membrane reactor gained steady denitrification efficiency. With an influent NO -3 -N of 150 mg-L - 1 , and an HRT of 3. 3 h, the removal efficiencies of NO -3 -N and TN were 91% and 77% , and the removal rate of TN was 0. 67-0. 83 kg·（m3·d） - 1 . The increase of volumetric loading rate of NO -3 -N and production of nitrogen gas led to the floating of sludge in the anaerobic sludge bed biofilm reactor. With an influent NO -3 -N of 185 mg-L - 1 and an HRT of 3. 3 h, the maximum removal rate of NO -3 -N of 1. 1 kg·（m3·d） - 1 was attained in anaerobic sludge bed biofilm reactor. But the increase of effluent NO -3 -N and NO -2 -N lowered the quality of effluent water seriously, and the floating of sludge affected the steady operation of the anaerobic sludge bed biofilm reactor. Sulfur particles with particle size of 0. 8 mm and 3. 0 mm were used as electron donors for start-up of two batch reactors. The experiment results indicated that the reactor which used sulfur particle size of 0. 8 mm attained higher removal efficiency of NO -3 -N and TN, and its effluent accumulated less NO -2 -N compared with the reactor which used particle size of 3. 0 mm.