基于藻菌共生体系的SBR处理模拟生活污水研究

在序批式活性污泥反应器(SBR)中接种入微藻培养形成藻菌共生体系,通过控制光照、曝气强度2个关键参数,对不同条件下藻菌共生SBR形成过程中的生物量变化、营养物质的去除效率、混合污泥性能及组分进行了研究。结果表明,在低光照强度(光量子通量密度92.27μmol/(m^2·s))和低曝气强度(0.2 L/min)下形成的藻菌共生体系的综合性能最好,达到稳定状态后反应器对COD、TP、NH_4^+-N、TN的去除率分别达到98.23%、98.00%、99.95%、94.47%。同时,藻菌共生反应器中的混合污泥具有良好的沉降性能,反应器污泥产率降低10.56%,剩余污泥含氮量提高,并伴随有微藻的产出,是一种新型的、具有营养物质回收能力的污水处理技术。

Study on Treatment of Simulated Domestic Sewage by SBR Based on Algae-Bacteria Symbiotic System

The chlorella was inoculated into the sequencing batch reactor(SBR)to form the algae-bacteria symbiotic system.By controlling the two key parameters of illumination and aeration intensity,the biomass change,the removal efficiency of nutrients,the performance and composition of mixed sludge during the formation of the algae-bacteria symbiotic SBR under different conditions were studied.The results showed that,it was determined that the algae-bacteria symbiotic system which formed under the low light intensity(photosynthetic photon flux density 92.27 μmol/(m^2·s))and the low aeration intensity of 0.2 L/min had the best comprehensive performance.After reaching a stable state,the removal rate of COD,TP,NH4^+-N and TN was 98.23%,98.00%,99.95% and 94.47%,respectively.Meanwhile,the mixed sludge in the reactor had the good sedimentation performance,the sludge yield of the reactor was reduced by 10.56%,the nitrogen content in excess sludge was increased with the production of microalgae,it is a new sewage treatment technology with nutrient recovery capability.