UASB偶联SBR强化畜禽养殖废水去除氮磷及产气的研究

本文研究了一种外循环上流式厌氧污泥床(UASB)偶联SBR强化畜禽养殖废水脱氮除磷及产气的新工艺。结果表明:UASB偶联SBR出水COD,NH+4-N及TP含量分别为147.6,17.8和2.6 mg/L,出水满足《畜禽养殖业污染物排放标准》(GB 18596-2001),相应的去除效率分别为91.8%,91.1%和85.5%。此外探究了COD容积负荷和温度对UASB启动期的影响,结果表明,15.0 kg/(m^3·d)和35℃为UASB启动时期的最佳容积负荷和温度。UASB偶联SBR工艺中COD的去除主要在UASB阶段,并且约占71.5%,而NH+4-N和磷酸盐的去除主要集中于SBR工艺好氧段。

Enhancement of Nitrogen and Phosphorus and Biogas Production from Livestock and Poultry Breeding Wastewater by UASB Coupling SBR

This paper studied a new technology of outside circulation up-flow anaerobic sludge blanket (UASB) coupled with SBR to enhance nitrogen and phosphorus removal and gas production from livestock and poutry breeding wastewater. The results showed that the effluent COD, NH + 4-N and TP of UASB coupling SBR were 147.6, 17.8 and 2.6 mg/L respectively. The effluent met the discharge standard of pollutants for livestock and poultry breeding(GB 18596-2001), and the corresponding removal efficiency was 91.8%, 91.1% and 85.5% respectively. In addition, the effect of COD volume loading and temperature on the start-up period of UASB was explored. The results showed that the optimum volume loading and temperature were 15.0 kg/(m ^3·d) and 35 ℃ in UASB startup period. The removal of COD in UASB coupling SBR process was mainly in the UASB stage, and accounted for about 71.5%, while the removal of NH + 4-N and phosphate were mainly concentrated in SBR aerobic phase.