ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785


Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 2
Written by Mirela-Elena DUȘA, Nicoleta VRÎNCEANU, Petre NEGRU, Eusebiu SAFTA, Vasilica STAN

Treatment and disposal of sludge produced during the waste water treatment is one of the most critical environmental issues of today. Therefore, different techniques are used for its disposal and recycling. Vermicomposting is one of the most ecologically and economically sound technologies for handling sewage sludge in order to convert it into a useful recyclable product. The aim of this study was to assess the effectiveness of vermicomposting process applied on three types of dehydrated sewage sludge coming from two different wastewater treatment plants using two earthworm species (Eisenia fetida and Eisenia andrei), as well as the compost quality. Biotic and abiotic parameters were used to assess the vermicomposting process and the quality of the obtained compost. The effect of heavy metal on earthworms was monitored durring the first stages of vermicomposting and at the end of the process. The compost quality was evaluated from an agronomic and ecological point of view through a germination seed test with cress seeds (Lepidium sativum).

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