文章摘要
罗昕怡,叶延超,石玉翠,游少鸿.外加电压对人工湿地处理生活污水效果的影响[J].农业环境科学学报,2021,40(6):1297-1304.
外加电压对人工湿地处理生活污水效果的影响
Effects of voltage on the efficacy of domestic sewage treatment by constructed wetlands
投稿时间:2020-10-27  
DOI:10.11654/jaes.2020-1236
中文关键词: 人工湿地  植物生理特性  微生物活性  电压  生活污水
英文关键词: constructed wetland  physiologic characteristics of plants  microbial activity  voltage  domestic sewage
基金项目:国家自然科学基金项目(51868010);桂林市科学研究与技术开发计划课题(20190219-3)
作者单位E-mail
罗昕怡 桂林理工大学广西环境污染控制理论与技术重点实验室, 广西 桂林 541004  
叶延超 桂林理工大学广西环境污染控制理论与技术重点实验室, 广西 桂林 541004  
石玉翠 桂林理工大学广西环境污染控制理论与技术重点实验室, 广西 桂林 541004  
游少鸿 桂林理工大学广西环境污染控制理论与技术重点实验室, 广西 桂林 541004 youshaohong@glut.edu.cn 
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中文摘要:
      为强化人工湿地去除污染物的性能,将外加电压与人工湿地结合,以探究湿地系统的最佳电压和运行条件。结果表明:种植植物且施加0.5 V和1 V电压(CW-0.5和CW-1)处理对植物生理特征变化无显著影响,且生长趋势优于对照组(种植植物施加0 V电压),而在种植植物施加2 V电压(CW-2)处理下,植物叶片中叶绿素含量降低,可溶性蛋白浓度、丙二醛(MDA)含量及SOD、POD和CAT活力增加;外加电压下人工湿地系统的最佳运行条件在水力停留时间为2 d、施加电压为1 V时,COD、NH4+-N、TN和TP的去除率分别为95.2%、92.5%、85.9%和98.2%,相较于对照组分别提高了9.3%、6.9%、10.3%和5.3%;在CW-2处理下,微生物乳酸脱氢酶(LDH)活力和蛋白质浓度相较于对照组分别提高10%和21%,三磷酸腺苷(ATP)浓度比对照组降低了14%,微生物多样性和丰富度下降,微生物活性受到抑制。研究表明,适宜电压能够促进植物生长发育,提高微生物活性和多样性,强化人工湿地系统去除污染物的性能。
英文摘要:
      To enhance the performance of constructed wetlands for the removal of pollutants, combined applied voltage with constructed wetlands, and explored the optimal voltage and operating conditions of wetlands systems. Our results showed a positive effect following CW-0.5 and CW-1 treatments on plant physiological characteristics and a better growth trend was observed than that of the control group. Following the CW-2 treatment, the contents of chlorophyll in plant leaves decreased, soluble protein, superoxide dismutase(SOD), peroxidase(POD), malondialdehyde(MDA), and CAT increased in plant leaves. Optimal operating conditions of constructed wetlands system under applied voltage were 2 days with hydraulic retention time at 1 V and the removal efficiency of chemical oxygen demand (COD), ammonia(NH4+-N), total nitrogen(TN)and total phosphorus(TP) were 95.2%,92.4%,85.9%, and 98.2%, respectively. Compared with the control group, these efficiencies increased by 9.3%, 6.9%, 10.3%, and 5.3%, respectively. At CW-2 disposal, microbial lactate dehydrogenase(LDH)and protein levels increased by 10% and 21%, respectively, while adenosine triphosphate(ATP)concentration decreased by 14% compared with the control group; moreover, microbial diversity and abundance reduced and microbial activity was inhibited. Thus, this study showed that suitable voltage can promote plant growth and development, improve microbial activity and diversity, and strengthen the performance of constructed wetlands systems to remove pollutants.
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