污水复合式厌氧水解酸化预处理试验研究

针对现有污水水解酸化预处理工艺运行效率低等问题,提出了一种复合式污水水解酸化处理工艺.自下至上依次经过悬浮污泥区、泥水分离区、生物膜强化出水区.通过处理配制啤酒废水试验表明,进水ρ(COD)在0.6~1.0 g/L时,ρ(COD)去除率大于50%,ρ(SS)去除率大于70%,ρ(BOD₅)/ρ(COD)升高0.25.试验还研究了悬浮污泥段污泥浓度、水力停留时间、进水有机物负荷对水解酸化效果的影响以及污泥减量化特性.该工艺耐有机负荷冲击能力强、对有机物去除率高、剩余污泥产量小、水解酸化效率高、占地面积小、便于一体化施工管理.

Hydrolysis and Acidification of Wastewater Pretreatment in a Novel Hybrid Anaerobic Bioreactor

A high efficient hydrolysis and acidification process for wastewater pretreatment was demonstrated in this study,through the analysis of the limitation of present hydrolysis and acidification processes used in many wastewater treatment plant.The novel process included suspending activated sludge phase,solid-liquid separation phase,biofilm phase,and the wastewater was treated by three phases in sequence.Through the treatment of the synthesis beery wastewater,when theρ(COD)of influent was 0.6～1.0 g/L,more than 50% ofρ(COD),70% ofρ(SS)removals were achieved under a HRT of 3.5 h,andρ(BOD_5)/ρ(COD)of effluent was increased by 25%.At the same time,the effect factors of MLSS in suspense phase,HRT and the organic load of influent for the nutrient removal and the sludge reduction in suspense phase were studied. In conclusion,the novel process has some merits:high endurance of the impact from the influent organic load- ing,excess sludge could be reduced effectively by the hydrolysis and acidification process,high efficiency of hydrolysis and acidification,occupancy land area is minor,and apt to unify construction and management.