Abstract
This study investigated the effects of temperature and volatile solids (VS) ratio of feedstock to inoculum (F/I ratio) on methane (CH4) production and the solubility of nitrogen (N), phosphorus (P), cooper (Cu), and Zinc (Zn) after anaerobic digestion (AD) of swine manure. The highest cumulative CH4 yield of 470 L/kgVSfeed was obtained with F/I ratios of 2.0 and 3.0 with mesophilic (37 °C) temperature, and methane production rate decreased with the increase of F/I ratio. As F/I ratio increased from 0.5 to 4.0, the lag phase for methane production increased from 1.02 days to 13.52 days, indicating an initial inhibition at high F/I ratios. AD increased the concentrations of ammonia, Cu and Zn in the AD effluent supernatant, while decreased total and water extractive P concentrations. The changes of ammonia, Cu, Zn, and P concentrations were more significant with the increase of F/I ratio.
Original language | English (US) |
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Article number | 122552 |
Journal | Bioresource Technology |
Volume | 299 |
DOIs | |
State | Published - Mar 2020 |
Externally published | Yes |
Bibliographical note
Funding Information:The project is supported by Ohio Department of Higher Education Harmful Algal Bloom Research Initiative; the National Natural Science Foundation of China (21466022, 21878139); the Young Talent Supporting Program Starting Fund of Xi'an Jiaotong University; and the National Study Abroad Fund in China.
Funding Information:
The project is supported by Ohio Department of Higher Education Harmful Algal Bloom Research Initiative; the National Natural Science Foundation of China ( 21466022 , 21878139 ); the Young Talent Supporting Program Starting Fund of Xi'an Jiaotong University; and the National Study Abroad Fund in China.
Publisher Copyright:
© 2019 Elsevier Ltd
Keywords
- Ammonia
- Anaerobic digestion
- Heavy metals
- Nutrient solubility
- Phosphorus
- Swine manure
PubMed: MeSH publication types
- Journal Article