【摘要】 针对规模化猪场养殖废水常规厌氧-好氧组合处理工艺及SBR处理工艺脱氮效率低、运行费用高、养分流失大等技术难题,提出了养殖废水"UASB-SFSBR(分步进水序批式反应器)-MAP(磷酸铵镁结晶)"处理工艺,并开展了中试工程研究.结果表明,UASB-SFSBR-MAP处理工艺对COD、NH4+-N和TP的去除率分别达到95.1%、92.7%和88.8%,MAP氮磷回收率达23.9%和83.8%.工艺出水水质COD≤135 mg·L-1、TN<116 mg·L-1、NH4+-N<43 mg·L-1、TP≤7.3 mg·L-1、SS≤50mg·L-1,各项指标优于《畜禽养殖业污染物排放标准》(GB 18596-2001).该处理工艺稳定可靠,生物脱氮过程保持系统碳源碱度自平衡,实现碳氮磷高效处理和回收,处理费用与传统厌氧-好氧处理工艺相当.因此,UASB-SFSBR-MAP组合处理工艺具有较高的推广应用价值,适合我国规模化猪场养殖废水的达标处理.更多还原

【Abstract】 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,NH+4-N and TP reached 95.1%、 92.7% and 88.8%,the recovery rate of NH+4-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,NH+4-N,TP and SS were not higher than 135,116,43,7.3 and 50 mg·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 of the large scale swine wastewater in China.更多还原