Journal article
Facilitated methanogenesis involved in anaerobic digestion of dairy manure by soil
Journal of cleaner production, Vol.236, p.117640
11/01/2019
Handle:
https://hdl.handle.net/2376/116916
Abstract
Shaping the microbial community involved in anaerobic digestion (AD) systems to achieve highly efficient methane production is a major challenge. In order to improve the methane recovery from dairy manure, soil, which has the potential of enhancing methane production from biomass, was used in an AD system as an additive. The results showed that the AD process performance and methane production efficiency were significantly improved by soil; an improvement in daily methane production, reduced time to steady state, enhancement of the methane content, and reduction in carbon dioxide content were obtained. The maximum methane production was obtained at a feedstock: soil ratio of 2.5:1 with yellow soil addition, which was 147.7 L/kg volatile solids (VS) and 25.4% higher than that of the control. High-throughput sequencing of the 16S ribosomal RNA gene and synthetic solution with cations equivalent to those of yellow and black soil revealed that soil addition mainly stimulated the growth of bacterial genera Ochrobactrum and Clostridium and archaeal genera Methanosaeta and Methanosarcina. The method of ion extraction was used to extract ions from the soil, and the ions were verified to be a main contributor to methane production improvement. By mimicking the cation components of soil, a synthetic solution was prepared and used in the AD system. The results showed that the cations contained in the ion liquid played a key role in improving methane production. The contribution of VS in the soil to the AD system was studied and found to have no significant effect on the improvement in methane production. It was found that the cations in soil played a key role in enhancing AD efficiency. Therefore, the simplified, low cost, and efficient approach used in this study had good practicability and could be used for treating other various biowastes with high energy recovery, which has the potential of promoting the development of AD technology.
•Efficient methane recovery from dairy manure enabled by soil is firstly reported.•The highest methane production (147.7 L/kg VS) was obtained from yellow soiled tests .•Soil stimulated the growth of syntrophic microbial communities.•Soil cations was verified to be crucial for the improved AD efficiency.•Total ammonium nitrogen content was reduced by chemical precipitation.
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Details
- Title
- Facilitated methanogenesis involved in anaerobic digestion of dairy manure by soil
- Creators
- Yiqing Yao - College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, ChinaHaiyun Li - MOE Key Laboratory of Environment and Genes Related to Diseases, School of Basic Medical Sciences, Xi'an Jiaotong University, Xi'an 710061, ChinaLing Qiu - College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, ChinaJingming Shi - School of Basic Medical Sciences, Xizang Minzu University, Xian’ Yang, Shaanxi, 712082, PR ChinaShulin Chen - Department of Biological Systems Engineering, Washington State University, Pullman, WA, 99164, USAYaojing Qiu - Department of Biological Systems Engineering, Washington State University, Pullman, WA, 99164, USAXiunan Yu - College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling, 712100, ChinaHong Qiang - College of Resources and Environment, Northwest A&F University, Yangling, 712100, ChinaYinan Yang - College of Resources and Environment, Northwest A&F University, Yangling, 712100, China
- Publication Details
- Journal of cleaner production, Vol.236, p.117640
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900582334501842
- Language
- English
- Resource Type
- Journal article