Esterilizador ultravioleta em estação de tratamento de esgoto visando reúso agrícola

L. Voltolini, Diego Fernando Atoche Garay, Claudinei Fonseca Souza
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Abstract

The normal release of sanitary sewage, in addition to allowing the transmission of diseases, generates water courses compromising its multiple uses as a source of supply, irrigation, reuse and recreation. The treatment of domestic sewage becomes an alternative of water and nutrients in agricultural cultivation, and must meet the criteria defined by legislation. Thus, this work aimed to evaluate the pathogenic load of the treated effluent, coming from a TEE, before and after the application of ultraviolet disinfection, demanding agricultural reuse. Weekly samplings were performed before and after ultraviolet disinfection (A / UV and D / UV) to characterize pH, turbidity, electrical conductivity (CE), dissolved oxygen (OD), total organic carbon (COT), total coliforms (CT) and thermotolerant (CThermo), as well as total nitrogen (NT). Between the raw effluent and the other sampled points A/UV and D/UV, important differences: pH, CE, OD, turbidity and NT. For COT there was no difference between the A/UV and D/UV points. CT and CThermo differed among all sampled points. It is concluded that the ultraviolet sterilizer presents efficiency in the elimination of bacteria despite the fact that the final microbiological load does not fit the current legislation, which makes the agricultural reuse of the treated effluent impossible.
污水处理厂用于农业回用的紫外线杀菌器
生活污水的正常排放除了使疾病得以传播外,还会产生河道,损害其作为供应、灌溉、再利用和娱乐来源的多种用途。生活污水的处理成为农业耕作用水和营养物的替代品,必须符合立法规定的标准。因此,本工作旨在评估TEE处理后的废水在应用紫外线消毒前后的致病负荷,要求农业回用。每周在紫外线消毒(A / UV和D / UV)前后取样,测定pH、浊度、电导率(CE)、溶解氧(OD)、总有机碳(COT)、总大肠菌群(CT)和耐热性(CThermo)以及总氮(NT)。在原液和其他采样点A/UV和D/UV之间,有重要的差异:pH、CE、OD、浊度和NT。对于COT, A/UV和D/UV点之间没有差异。CT和CThermo在所有采样点之间存在差异。结论是,尽管最终的微生物负荷不符合现行立法,但紫外线消毒器在消除细菌方面表现出效率,这使得处理后的废水无法进行农业再利用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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