| 规模化猪场养殖废水UASB-SFSBR-MAP处理工艺中试研究 |
| 摘要点击 3730 全文点击 2419 投稿时间：2012-05-09 修订日期：2012-08-16 |
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| 中文关键词 猪场养殖废水 脱氮 除磷 SFSBR MAP 结晶 回收 |
| 英文关键词 swine wastewater nitrogen removal phosphorous removal SFSBR MAP crystallization recovery |
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| 中文摘要 |
| 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≤50 mg·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. |
| 英文摘要 |
| 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·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. |
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