State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
Mar Pollut Bull. 2020 Nov;160:111671. doi: 10.1016/j.marpolbul.2020.111671. Epub 2020 Sep 18.
This study investigated the co-effect of microplastic polyvinylchloride and antibiotics tetracycline to partial nitrification process in treating high ammonia wastewater. The average ammonia oxidation rate of all reactors was 53.58, 56.17 and 42.08 mg·N/L·h in round 1, round 7 and round 13, respectively. The ammonia oxidation rate was reduced to 89.40%, 79.08%, 80.60%, 73.37%, 69.50%, 75.72%, 98.93% and 66.04% from 1st round of test to 13th round of test at reactor R1 to R8. The average nitrosation rate was always over 80% in all conditions tested. Tetracycline removal rate was attributed to sludge adsorption in all reactors and was increased continuously with the increment of tetracycline concentration. The nitrous oxide emission was keep decreasing from round 1 to round 13 in all reactors tested. The microbial community results revealed that with the existence of tetracycline and microplastics, the relative abundance of Bacteroidetes were reduced and Proteobacteria were increased.
本研究考察了微塑料聚氯乙烯和抗生素四环素对处理高氨废水的部分硝化过程的协同作用。在第 1 轮、第 7 轮和第 13 轮中，所有反应器的平均氨氧化速率分别为 53.58、56.17 和 42.08 mg·N/L·h。从第 1 轮测试到第 13 轮测试，在反应器 R1 到 R8 中，氨氧化速率分别降低到 89.40%、79.08%、80.60%、73.37%、69.50%、75.72%、98.93%和 66.04%。在所有测试条件下，亚硝化速率始终保持在 80%以上。在所有反应器中，四环素的去除率归因于污泥吸附，并且随着四环素浓度的增加而不断增加。在所有测试的反应器中，从第 1 轮到第 13 轮，一氧化二氮的排放量不断减少。微生物群落的结果表明，随着四环素和微塑料的存在，拟杆菌门的相对丰度减少，变形菌门的相对丰度增加。
