Highlights ► The degradation of straw was significantly enhanced by earthworms. ► The production cycle was shortened. ► Little NH3 and CH4 production but no accumulation during the process. ► Soil-like substrates was feasible for plant growth.

    Abstract The soil-like substrate (SLS) technique is key for improving the closure of bioregenerative life support system (BLSS) by recycling the inedible biomass of higher plants. In this study, a novel SLS technique (NSLST) was proposed: aerobic fermentations at 35°C for 1day, then 60°C for 6days, finally 30°C for 3days, followed by earthworm treatment for 70days. Comparing with the original SLS technique (OSLST), its process cycle was 13days shorter, and the dry weight loss rate (81.1%) was improved by 24.77%. The cellulose and lignin degradation rates were 96.6% and 94.6%. The concentrations of available N, P and K in mature SLS were respectively 776.1mg/L, 348.0mg/L and 7943.0mg/L. Low CH4 and NH3 production was observed, but no accumulation. According to the seed germination test, the SLSs were feasible for plant growth. This investigation will provide a preliminary foundation for BLSS design.


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    Title :

    Characteristics of the soil-like substrates produced with a novel technique combining aerobic fermentation and earthworm treatment


    Contributors:
    Kang, Wenli (author) / He, Wenting (author) / Li, Leyuan (author) / Liu, Hong (author)

    Published in:

    Advances in Space Research ; 50 , 11 ; 1495-1500


    Publication date :

    2012-06-24


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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