Journal
BIORESOURCE TECHNOLOGY
Volume 301, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.122753
Keywords
Anaerobic co-digestion; Vermiculite accelerant; Biogas production; Phosphorus content; Total nutrient content
Funding
- NSFC [51672208]
- National Key R&D Program of China [2018YFB1502902]
- Key Program for International S&T Cooperation Projects of Shaanxi Province [2019KWZ-03]
- Sci-Tech R&D Program of Shaanxi Province [2010K01-120, 2011JM6010, 2015JM5183]
- SRF for ROCS, SEM [(2012)904]
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Phosphorus content of the digestate is crucial for evaluating its fertilizer utilization in anaerobic digestion system. The vermiculite containing rich-phosphorus is firstly used as an accelerant in anaerobic batch co-digestion system of aloe peel waste and dairy manure. After introducing vermiculite, the cumulative biogas production (295.14-353.96 mL/g VS), chemical oxygen demand removal rate (45.53%-71.03%), and volatile solid removal rate (50.70%-52.76%) are remarkably higher than those of reference reactor (234.08 mL/g VS, 39.38%, 45.10%). The thermal and fertility analyses manifest the digestates with vermiculite possess superior stability, admirable fertilizer values (5.97%-6.81%), and excellent total phosphorus content (11.44-13.29 g/kg). The improved co-digestion performance can be attributed to the addition of vermiculite. This work introduces a novel approach for improving the performance of anaerobic co-digestion and the fertilizer utilization of digestate in the co-digestion systems.
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