新型高效反应器组合系统处理奶牛养殖场废水试验研究

选择一种新型高效反应器系统对奶牛养殖场废水进行处理试验研究,这种反应器系统主要包括两级组合生物巢厌氧反应器和砂式沼液处理池。试验结果表明,该系统处理奶牛养殖废水速度快,两级组合生物巢厌氧反应器水力停留时间（HRT）仅为15h,处理效率高,砂式沼液处理池结构简单,对生物巢厌氧反应器出水处理效果好。该新型高效反应器组合系统对化学需氧量（COD）、生化需氧量（BOD）、氨氮（NH3-N）和总固体悬浮物（TSS）的平均去除率分别为97.6%、98.2%、81.3%和98.1%,出水体积质量平均值分别为89.0、27.1、15.7mg·L^-1和64.9mg·L^-1,满足国家二级排放标准。

The Dairy Farm Wastewater Treatment with New Efficient Reactor System

With the rapid development of current dairy cow cultivation,a large number of manure were produced, which had caused environmental pollution. A new efficient reactor system had been used for treating dairy farm wastewater. The system was mainly formed of two anaerobic bio-nest reactors. One was bio-nest reactor; the other was sand-type reactor. Anaerobic bio-nest reactor was a kind of new efficient anaerobic reactor by biological nest material as a carrier. The biological nest material is a number of long spiral band structure cut by the black PVC pipe, width of 1.5 cm, thickness of 0.15~0.21 mm, surface area of 2 800~3 000 m2·m-3, conducive to the adsorption and growth of bacteria. At the same time, due to the little difference of the proportion of the material with water, the material would automatically float with the water in the anaerobic reactor, which increased the contact with the wastewater and elevate efficiency. Sand-type was a kind of new slurry handling equipment by substrate and microbial synergy through physical, chemical and biological role, with different particle size yellow sand as a substrate handling slurry, hydraulic loading 0.04 m2·m-2·d-1. Test results indicated that：The HRT of the system was 15 h; the removal rates of COD, BOD, NH3-N and TSS were 97.6%, 98.2%, 81.3% and 98.1% respectively. The final discharge concentrations were 89.0, 27.1, 15.7 and 6.49 mg·L^-1 respectively, which satisfy the second level of National Discharge Standard. The system was suitable for promotion and use in the dairy farms.