Microbial indicators in municipal solid waste compost and their fate after land application of compost

IF 3 4区环境科学与生态学 Q3 ENGINEERING, ENVIRONMENTAL

Journal of Environmental Health Science and Engineering Pub Date : 2022-11-12 DOI:10.1007/s40201-022-00841-y

Sepideh Sadeghi, Amir Hossein Nafez, Mahnaz Nikaeen, Farzaneh Mohammadi, Davood Jafary Tady, Maryam Hatamzadeh

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Abstract

Despite the extensive agricultural use of municipal solid waste (MSW) compost, there is little information about microbial characteristics of the MSW compost and fate of microorganisms following land application. This study was designed to determine the microbial quality and germination index (GI) of the MSW compost as well as fate of indicator microorganisms after application of MSW compost. The results showed a high fraction of samples are immature (GI < 80). In 27% and 16% of samples fecal coliforms and Salmonella were detected in a range exceeding the recommended value for unrestricted application of compost, respectively. HAdV was also detected in 62% of samples. Fecal enterococci were detected with relatively high concentrations in all samples and showed higher survival rate than other indicators in land-applied MSW compost. The results showed that climate condition significantly contributed to the decline of indicator bacteria in land-applied compost. The results highlight the need for further quality monitoring of compost to ensure that its application does not lead to environmental or human health problems. Furthermore, because of the high concentrations and high survival rate of enterococci in compost samples, they can be specifically proposed as an indicator microorganism for MSW compost quality monitoring.

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城市生活垃圾堆肥中的微生物指标及其在堆肥土地施用后的去向

摘要尽管城市生活垃圾(MSW)堆肥在农业上得到了广泛的应用，但关于城市生活垃圾堆肥的微生物特性和微生物在土地利用后的命运的信息却很少。本试验旨在测定城市生活垃圾堆肥的微生物品质和萌发指数(GI)，以及施用城市生活垃圾堆肥后指示微生物的命运。结果显示，大部分样品未成熟(GI < 80)。在27%和16%的样品中，粪便大肠菌群和沙门氏菌的检测值分别超过了无限制施用堆肥的推荐值。在62%的样本中也检测到hav。粪便肠球菌在所有样品中均检测到较高的浓度，其存活率高于其他指标。结果表明，气候条件对土壤堆肥中指示菌数量的下降有显著影响。研究结果强调需要进一步监测堆肥的质量，以确保其应用不会导致环境或人类健康问题。此外，由于肠道球菌在堆肥样品中的高浓度和高存活率，可以专门提出将其作为城市生活垃圾堆肥质量监测的指示微生物。

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来源期刊

Journal of Environmental Health Science and Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES

CiteScore

7.50

自引率

2.90%

发文量

期刊介绍： Journal of Environmental Health Science & Engineering is a peer-reviewed journal presenting timely research on all aspects of environmental health science, engineering and management. A broad outline of the journal''s scope includes: -Water pollution and treatment -Wastewater treatment and reuse -Air control -Soil remediation -Noise and radiation control -Environmental biotechnology and nanotechnology -Food safety and hygiene