College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China.
ZhiHe Environmental Science and Technology Co., Ltd., Zhengzhou 450001, China.
Bioresour Technol. 2019 Oct;289:121714. doi: 10.1016/j.biortech.2019.121714. Epub 2019 Jun 27.
In this study, multistage contact oxidation reactor (MCOR) with a novel carrier was used for treatment of high-strength sodium saccharin wastewater (SSW) under stepwise increasing salinities from 1.0% to 8.0%. The results revealed that MCOR could effectively remove the organic pollutants from SSW when influent salinity was no more than 4.5%; the chemical oxygen demand (COD) and NH-N removal efficiency under the optimal operating parameters ranged up to 91.5% and 92.7%, respectively. Microbial diversity analysis illustrated that the dominant microbes in SSW treatment system were substantially distinct at different salinities. Pseudomonas was predominant at salinity of 3.5%, while Marinobacterium (a species involved in COD removal) was enriched to a greater degree at salinity of 7.0%. CCA suggested that salinity was the main factor for dynamic evolutions of microbial community structures. This work demonstrated that MCOR is an appropriate method for the treatment of high-strength, high-salinity SSW.
在这项研究中，采用多阶段接触氧化反应器（MCOR）和新型载体，在逐步增加盐度从 1.0%到 8.0%的情况下，处理高强度糖精钠废水（SSW）。结果表明，当进水盐度不超过 4.5%时，MCOR 可以有效地去除 SSW 中的有机污染物；在最佳运行参数下，COD 和 NH3-N 的去除效率分别高达 91.5%和 92.7%。微生物多样性分析表明，在不同盐度下，SSW 处理系统中的优势微生物有很大的不同。假单胞菌在盐度为 3.5%时占优势，而 Marinobacterium（一种参与 COD 去除的物种）在盐度为 7.0%时更丰富。CCA 表明盐度是微生物群落结构动态演变的主要因素。这项工作表明，MCOR 是处理高强度、高盐度 SSW 的一种合适方法。
