Wang Liang, Chen Chong-Jun, Chen Ying-Xu, Wu Wei-Xiang
College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
Huan Jing Ke Xue. 2013 Mar;34(3):979-85.
In this paper, a treatment process consisted of UASB, step-fed sequencing batch reactor (SFSBR) and magnesium ammonium phosphate precipitation reactor (MAP) was built to treat the large scale swine wastewater, which aimed at overcoming drawbacks of conventional anaerobic-aerobic treatment process and SBR treatment process, such as the low denitrification efficiency, high operating costs and high nutrient losses and so on. Based on the treatment process, a pilot engineering was constructed. It was concluded from the experiment results that the removal efficiency of COD, NH4(+) -N and TP reached 95.1%, 92.7% and 88.8%, the recovery rate of NH4(+) -N and TP by MAP process reached 23.9% and 83.8%, the effluent quality was superior to the discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001), mass concentration of COD, TN, NH4(+) -N, TP and SS were not higher than 135, 116, 43, 7.3 and 50 mg x L(-1) respectively. The process developed was reliable, kept self-balance of carbon source and alkalinity, reached high nutrient recovery efficiency. And the operating cost was equal to that of the traditional anaerobic-aerobic treatment process. So the treatment process could provide a high value of application and dissemination and be fit for the treatment pf the large scale swine wastewater in China.
本文构建了一种由上流式厌氧污泥床（UASB）、分步进水序批式反应器（SFSBR）和磷酸铵镁沉淀反应器（MAP）组成的处理工艺，用于处理大规模猪场废水，旨在克服传统厌氧 - 好氧处理工艺和SBR处理工艺的缺点，如反硝化效率低、运行成本高和营养物质损失大等。基于该处理工艺，构建了中试工程。实验结果表明，COD、NH4(+) -N和TP的去除率分别达到95.1%、92.7%和88.8%，MAP工艺对NH4(+) -N和TP的回收率分别达到23.9%和83.8%，出水水质优于畜禽养殖业污染物排放标准（GB 18596 - 2001），COD、TN、NH4(+) -N、TP和SS的质量浓度分别不高于135、116、43、7.3和50 mg·L(-1)。所开发的工艺可靠，能保持碳源和碱度的自平衡，营养物质回收效率高。且运行成本与传统厌氧 - 好氧处理工艺相当。因此，该处理工艺具有较高的应用和推广价值，适合我国大规模猪场废水的处理。
