间歇式进水 3-氯苯胺冲击负荷对序批式反应器性能、微生物群落和酶活性的影响。
Effects of transient 3-chloroaniline shock loading on the performance, microbial community and enzymatic activity of sequencing batch reactor.
机构信息
Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao, 266100, China.
Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, China.
出版信息
J Environ Manage. 2020 Mar 15;258:110017. doi: 10.1016/j.jenvman.2019.110017. Epub 2020 Jan 7.
Chloroanilines from industrial wastewater can produce adverse effects on biological wastewater treatment systems due to their potential biotoxicity. The performance, nitrogen removal rate, microbial community and enzymatic activity of a sequencing batch reactor (SBR) were evaluated under transient 3-chloroaniline shock loading. After 40 mg/L 3-chloroaniline shock loading of 24 h on day 9, the chemical oxygen demand (COD) removal efficiency decreased from 90.71% on day 8 to 80.57% on day 11, and the NH-N removal efficiency reduced from 98.96% on day 8 to 35.51% on day 12. Subsequently, the COD and NH-N removal efficiencies gradually recovered to normal value. Compared with the absence of 3-chloroaniline shock loading, the ammonia-oxidizing rate (SAOR), nitrite-oxidizing rate (SNOR), nitrite-reducing rate (SNIRR) and nitrate-reducing rate (SNRR) decreased by 66.19%, 14.49%, 16.20% and 49.38% on day 11, respectively, and then they gradually recovered to normal value. The SAOR, SNOR, SNIRR and SNRR displayed the similar varying trends to the activities of ammonia monooxygenase, nitrite oxidoreductase, nitrite reductase and nitrate reductase, respectively. The appearance of 3-chloroaniline promoted the microbial reactive oxygen species production and lactate dehydrogenase release. The transient 3-chloroaniline shock loading distinctly impacted the microbial richness and diversity. The present research results can provide theoretical basis and technical support for evaluating the effects of transient 3-chloroaniline shock on biological wastewater treatment systems, which is beneficial to take reasonable preventable measures to decrease the adverse effects on the bioreactor performance.
工业废水中的氯苯胺由于其潜在的生物毒性，会对生物废水处理系统产生不良影响。本研究采用序批式反应器（SBR），评估了在 3-氯苯胺冲击负荷下系统的性能、脱氮率、微生物群落和酶活性。在第 9 天进行了 24 h、浓度为 40 mg/L 的 3-氯苯胺冲击负荷实验后，COD 去除效率从第 8 天的 90.71%下降到第 11 天的 80.57%，NH4+-N 去除效率从第 8 天的 98.96%下降到第 12 天的 35.51%。随后，COD 和 NH4+-N 的去除效率逐渐恢复到正常水平。与没有 3-氯苯胺冲击负荷相比，第 11 天氨氧化速率（SAOR）、亚硝酸盐氧化速率（SNOR）、亚硝酸盐还原速率（SNIRR）和硝酸盐还原速率（SNRR）分别下降了 66.19%、14.49%、16.20%和 49.38%，随后逐渐恢复到正常水平。SAOR、SNOR、SNIRR 和 SNRR 的变化趋势与氨单加氧酶、亚硝酸盐氧化还原酶、亚硝酸盐还原酶和硝酸盐还原酶的活性相似。3-氯苯胺的出现促进了微生物活性氧的产生和乳酸脱氢酶的释放。3-氯苯胺的冲击负荷明显影响了微生物的丰富度和多样性。本研究结果可为评价 3-氯苯胺对生物废水处理系统的影响提供理论依据和技术支持，有利于采取合理的预防措施，降低对生物反应器性能的不利影响。
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