间歇曝气序批式反应器与传统序批式反应器处理猪场沼液性能的比较研究

[A Comparative Study on Performance of an Intermittent Aeration SBR and a Traditional SBR for Treatment of Digested Piggery Wastewater].

作者信息

Dong Bao-Gang, Song Xiao-Yan, Liu Rui, Kawagishi Tomoki, Zhang Yong-Ming, Chen Lü-Jun

机构信息

College of Life and Environmental Sciences, Shanghai Normal University, Shanghai 200234, China.

Department of Environment in Yangtze Delta Region Institute of Tsinghua University, Zhejiang Provincial Key Laboratory of Water Science and Technology, Jiaxing 314006, China.

出版信息

Huan Jing Ke Xue. 2016 Nov 8;37(11):4309-4316. doi: 10.13227/j.hjkx.201603028.

DOI:10.13227/j.hjkx.201603028

PMID:29964686

Abstract

An intermittently aerated sequencing batch reactor (IASBR) and a traditional sequencing batch reactor (SBR) were respectively used for treating digested piggery wastewater, and the pollutant removal performance was studied at different ratios of chemical oxygen demand (COD) to total nitrogen (TN) in the influent and different loading rates. The results showed that the pollutant removal rates in the IASBR were much higher than those in the SBR. Under influent COD/TN of about 2.2 and NH-N loading of (0.12±0.04) kg·(m·d), the removal rates of NH-N, TN and TOC in the IASBR were 97.2%±4.4%, 81.5%±7.5% and 88.5%±2.4%, respectively, higher than the corresponding rates of 78.3%±19.6%, 79.8%±4.9% and 86.6%±3.2% in the SBR. As the NH-N loading was increased to (0.18±0.02) kg·(m·d), the removal rates of NH-N, TN and TOC in the IASBR were slightly decreased to 92.4%±7.3%, 77.5%±5.3% and 86.4%±2.2%, but still higher than the corresponding values of 78.1%±15.4%, 61.8%±11.2% and 81.8%±5.6% in the SBR. As the NH-N loading was remained at (0.20±0.01) kg·(m·d), but the influent COD/TN ratio was increased to about 3.0, the pollutant removal rates in both IASBR and SBR were increased, compared to those at influent COD/TN ratio of 2.2.The removal rates of NH-N, TN and TOC in the IASBR were 99.6%±0.2%, 91.5%±2.9% and 92.0%±0.9%, respectively, higher than the corresponding rates of 90.2%±1.4%, 83.0%±1.9% and 90.2%±0.5% in the SBR. Based on the above, the IASBR was more efficient in TN and ammonium removal and more shocking load resistant, and therefore was more feasible than SBR for treating low COD/TN ratio wastewaters such as the digested piggery wastewater.

摘要

分别采用间歇曝气序批式反应器（IASBR）和传统序批式反应器（SBR）处理猪场沼液，研究了进水化学需氧量（COD）与总氮（TN）不同比例及不同负荷率下的污染物去除性能。结果表明，IASBR的污染物去除率远高于SBR。在进水COD/TN约为2.2、氨氮负荷为（0.12±0.04）kg·（m·d）时，IASBR中氨氮、TN和总有机碳（TOC）的去除率分别为97.2%±4.4%、81.5%±7.5%和88.5%±2.4%，高于SBR中相应的78.3%±19.6%、79.8%±4.9%和86.6%±3.2%。当氨氮负荷增加到（0.18±0.02）kg·（m·d）时，IASBR中氨氮、TN和TOC的去除率略有下降，分别为92.4%±7.3%、77.5%±5.3%和86.4%±2.2%，但仍高于SBR中相应的78.1%±15.4%、61.8%±11.2%和81.8%±5.6%。当氨氮负荷保持在（0.20±0.01）kg·（m·d），但进水COD/TN比增加到约3.0时，与进水COD/TN比为2.2时相比，IASBR和SBR的污染物去除率均有所提高。IASBR中氨氮、TN和TOC的去除率分别为99.6%±0.2%、91.5%±2.9%和92.0%±0.9%，高于SBR中相应的90.2%±1.4%、83.0%±1.9%和90.2%±0.5%。基于以上结果，IASBR在TN和铵去除方面效率更高，抗冲击负荷能力更强，因此对于处理猪场沼液等低COD/TN比废水比SBR更具可行性。