| A/O与SBR工艺处理猪场废水厌氧消化液对比研究 |
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| 引用本文： | 蔡英英,韩志刚,邓良伟,王文国.A/O与SBR工艺处理猪场废水厌氧消化液对比研究[J].农业环境科学学报,2022,41(3):648-657. |
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| 作者姓名： | 蔡英英 韩志刚 邓良伟 王文国 |
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| 作者单位： | 农业农村部沼气科学研究所, 农业农村部可再生能源开发利用重点实验室, 成都 610041;福州共创环保技术有限公司, 福州 350000 |
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| 基金项目： | 国家现代农业产业技术体系(CARS-35) |
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| 摘 要： | 缺氧/好氧工艺（A/O）与序批式活性污泥法（SBR）是应用最为广泛的猪场废水厌氧消化液好氧处理工艺，但两者的处理性能孰优孰劣，目前尚无定论。基于此，本研究对比了实验室规模的A/O与SBR工艺处理猪场废水厌氧消化液的性能。结果表明：两种工艺直接处理猪场废水厌氧消化液，出水pH值下降至6以下，平均NH4+-N去除率均低于50%，但SBR的NH4+-N去除率略高于A/O。补充碱度后，4个氮负荷（0.02，0.04，0.06，0.08 kg·kg-1·d-1）下，两种工艺的NH4+-N去除率提高到99%以上，但对COD、TN和TP去除的改善不明显，并且A/O与SBR对COD、NH4+-N、TN、TP去除效果无显著差异。活性试验表明，SBR的氨氧化活性和厌氧氨氧化活性高于A/O，但是反硝化活性要显著低于A/O。Stover–Kincannon模型与试验数据拟合良好（R2>0.9），A/O和SBR对COD、TN、NH4+-N的最大去除负荷（Umax）分别为7.62、0.28、48.8 g·L-1·d-1和7.18、0.13、65.4 g·L-1·d-1，说明SBR有利于NH4+-N转化，而A/O有利于COD与TN去除。
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| 关 键 词： | 猪场废水 厌氧消化液 A/O SBR Stover-Kincannon模型 |
| 收稿时间： | 2021/8/9 0:00:00 |
Comparative study on A/O and SBR processes for the treatment of digested effluent of swine wastewater |
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| CAI Yingying,HAN Zhigang,DENG Liangwei,WANG Wenguo.Comparative study on A/O and SBR processes for the treatment of digested effluent of swine wastewater[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2022,41(3):648-657. |
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| Authors: | CAI Yingying HAN Zhigang DENG Liangwei WANG Wenguo |
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| Institution: | Key Laboratory of Development and Application of Rural Renewable Energy, Ministry of Agriculture and Rural Affairs, Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China;Fuzhou Gongchuang Environmental Technology Co., Ltd., Fuzhou 350000, China |
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| Abstract: | The anoxic/oxic(A/O) process and sequencing batch reactor(SBR) process are popular aerobic biological processes for the treatment of digested effluent of swine wastewater. However,it is unclear which process has better performance. Therefore,laboratory-scale A/O and SBR processes were applied to compare their performance for the treatment of digested effluent of swine wastewater. The results showed that when the A/O and SBR processes were used to treat the digested effluent directly,the pH decreased to less than 6,thereby resulting in an average NH4+-N removal efficiency of less than 50%. However,the NH4+-N removal efficiency in the SBR process was slightly higher than that in the A/O process. After the digested effluent was supplemented with alkalinity,the NH4+-N removal efficiency in the two processes was improved to more than 99%. However,the improvement of the removal efficiencies of chemical oxygen demand (COD),total nitrogen(TN),and total phosphorus(TP) was not clear. There was no significant difference between the A/O and SBR processes in removing COD,NH4+-N,TN,and TP. Higher NH4+ oxidation and anammox activities were observed in the SBR process than in the A/O process,whereas the denitrification activity in the SBR process was much lower than that in the A/O process. The modified Stover- Kincannon model best fit the experimental data(R2>0.9). The maximum COD,TN,and NH4+-N utilization rates were 7.62,0.28,and 48.80 g·L-1·d-1 in the A/O process, and 7.18,0.13,and 65.4 g·L-1·d-1 in the SBR process,respectively. The results suggest that the SBR process is more favorable for NH + 4-N conversion,whereas the A/O process is more favorable for COD and TN removal. |
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| Keywords: | swine wastewater digested effluent anoxic/oxic process sequencing batch reactor Stover-Kincannon model |
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