Microbiological assessment of wastewater of industrial enterprises in Kyiv and the Kyiv region

O. V. Surmasheva, Y. Zheludenko, O.V. Molchanets, Mykhailo Rosada, О.О. Polka, S.P. Zadkova
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Abstract

The aim: industrial wastewater microbiological monitoring and its effect on the drainage water condition. Purpose: microbiological monitoring of industrial wastewater and its impact on the state of surface waters. Materials and methods: wastewater quality evaluation was performed according to the parameters: the lactose-positive coliforms (LPC) count, the coli index, coliphages count and the pathogenic enterobacteria presence. Results: wastewater (WW) treated with full biological treatment and disinfection, UV radiation, chlorination and the cleansing structures use was studied. Industrial WW samples met the 1-2 quality class requirements. 7 food processing wastewater samples did not meet the discharge into an open water requirements in terms of LCP count, which was in the range from 2300 CFU/dm3 to 46000 CFU/dm3, it indicates water fecal pollution. At the same time, according to the coliphages count, these samples belonged to the 2nd quality class. Surface water samples comparative analysis before and after the industrial wastewater discharge shows that the investigated wastewater discharge did not lead to surface watercourse microbiological contamination. Conclusions: according to the 41 industrial wastewater reuse samples microbiological quality monitoring results for the period January 2021-June 2023, 34 WW samples were met the 1-2 quality class requirements, which indicates their satisfactory purification and the discharge possibility into an open water body. 7 samples did not meet the LCP number requirement, which indicates poor-quality purification and their fecal contamination. It was established that the surface watercourse before and after the reuse wastewater discharge, according to the LCP count, the coli index, coliphages count belong to the 1-2 quality class. The investigated industrial wastewater discharge did not exceed the allowance allocation and did not lead to surface waters microbiological contamination.
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基辅和基辅地区工业企业废水微生物评估
目的:工业废水微生物监测及其对排水状况的影响。目的:工业废水微生物监测及其对地表水状况的影响。材料和方法:根据乳糖阳性大肠菌群(LPC)计数、大肠杆菌指数、大肠杆菌计数和致病性肠杆菌存在情况等参数对废水水质进行评估。结果:研究了经完全生物处理和消毒、紫外线辐射、氯化和使用清洁结构处理的废水(WW)。工业废水样本符合 1-2 级质量要求。7 份食品加工废水样本的 LCP 计数不符合排入开放水域的要求,其范围在 2300 CFU/dm3 至 46000 CFU/dm3 之间,这表明水体受到了粪便污染。同时,根据大肠杆菌计数,这些水样属于二类水质。工业废水排放前后的地表水样本对比分析表明,所调查的废水排放并未导致地表水道微生物污染。结论:根据 2021 年 1 月至 2023 年 6 月期间 41 个工业废水回用样品微生物质量监测结果,34 个 WW 样品符合 1-2 质量等级要求,表明其净化效果令人满意,可以排放到开放水体中。7 个样本未达到 LCP 编号要求,表明净化质量差,存在粪便污染。根据 LCP 数、大肠杆菌指数、大肠杆菌数,可以确定回用废水排放前后的地表水道属于 1-2 级水质。所调查的工业废水排放未超过允许分配量,也未导致地表水微生物污染。
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