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首页> 外文期刊>Biotechnologie, Agronomie Societe et Environnement >Factors influencing microbiological and chemical composition of South-Belgian raw sludge
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Factors influencing microbiological and chemical composition of South-Belgian raw sludge

机译：影响比利时南部原污泥微生物学和化学组成的因素

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Wastewater treatment plants produce sludges which are likely to contain microbial pathogens, metallic trace elements and organic micropollutants. The aim of this study was to assess factors influencing the quality of raw sludge, i.e. freshly-producedand non-treated sludge. The survey of raw sludge quality was conducted each season over a year with controlled factors such as sludge type (primary or biological; rural or urban area origin) and seasonal evolution. Quality of raw sludge was characterizedby the determination of microbiological (Salmonella spp., Escherichia coli, enterococci, spores of Clostridium perfringens) and chemical parameters (metallic trace elements, organic index). The organic index is a new parameter based on a gas chromatography method and developed in this study in order to estimate global organic semi-volatile load in sludge. Results showed significant differences in raw sludge quality depending on controlled factors. Thus, E. coli, and enterococci concentrations were higher in primary and biological urban raw sludge compared to biological rural sludge. Concentrations of Hg and organic semi-volatile compounds, estimated by organic index, were higher in primary urban raw sludge than biological sludges of rural or urban origin. As, Ni and Co loads were higher in biological rural raw sludge compared to primary and biological urban sludge. Spores of C. perfringens concentration in raw sludge was lower in autumn. Organic index in raw sludge was lower in spring and in summer.In conclusion, results showed that sludge quality varies significantly, depending of sludge type and seasonal 'evolution.
机译：废水处理厂产生的污泥可能含有微生物病原体，金属微量元素和有机微量污染物。这项研究的目的是评估影响原始污泥（即新鲜生产和未经处理的污泥）质量的因素。一年中的每个季节都对原始污泥质量进行了调查，其中包括可控因素，例如污泥类型（主要或生物;农村或城市地区来源）和季节演变。通过测定微生物（沙门氏菌，大肠杆菌，肠球菌，产气荚膜梭菌的孢子）和化学参数（金属微量元素，有机指数）来表征原污泥的质量。有机指数是基于气相色谱法的新参数，是本研究中开发的，用于估算污泥中的整体有机半挥发性负荷。结果表明，取决于可控因素，原始污泥质量存在显着差异。因此，与农村的农村污泥相比，城市的初级和城市污泥中的大肠杆菌和肠球菌浓度更高。通过有机指数估算出的汞和有机半挥发性化合物的浓度在城市一级原始污泥中要高于农村或城市来源的生物污泥。由于农村原始生物污泥中的Ni和Co含量高于城市原始污泥和生物污泥中的Ni和Co含量。秋季，产污泥中产气荚膜梭菌的孢子浓度较低。春季和夏季，原始污泥的有机指数较低。总之，结果表明，污泥质量随污泥类型和季节变化而显着变化。

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