Journal
BIORESOURCE TECHNOLOGY
Volume 340, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2021.125619
Keywords
Microbial electrolysis cell; Anaerobic digestion; Swine manure; Kinetic models; Back-propagation artificial neural network
Funding
- Industrial Technology Leading Talents Project of Ten Thousand Plan of Yunnan Province [20191096]
- Science and Technology Development Project of Jilin Province [20200402099NC, 20200403010SF]
- Model Worker Innovation Studio of Biogas Engineering and Resource Utilization, Special Project of International Science and Technology Cooperation of Yunnan Province [202003AF140001]
- Kunming International Science and Technology Cooperation Base and Yunnan Provincial Key Laboratory of Rural En-ergy Engineering
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Microbial electrolysis cell coupled anaerobic digestion (MEC-AD) is an effective technology for recycling swine manure, with the optimal voltage of 0.9 V resulting in maximum biogas and methane yields. The use of BP-ANN model proved superior in studying cumulative yields and establishing a model for enhanced gas production and accelerated substrate degradation.
Microbial electrolysis cell coupled anaerobic digestion (MEC-AD) is a new technology in energy recovery and waste treatment, which could be used to recycle swine manure. Here, different applied voltage effects were studied using MEC-AD with swine manure as a substrate. The maximum cumulative biogas and methane yields, both occurring with 0.9 V, were 547.3 mL/g total solid (TS) and 347.7 mL/g TS, respectively. The increased energy can counterbalance the electrical input. First order, logistic, gompertz, and back-propagation artificial neural network (BP-ANN) models were used to study cumulative biogas and methane yields. The BP-ANN model was superior to the other three models. The maximum degradation rate of hemicellulose, cellulose, and lignin was 60.97%, 48.59%, and 31.59% at 0.9 V, respectively. The BP-ANN model establishes a model for cumulative biogas and methane yields using MEC-AD. Thus, MEC-AD enhanced biogas and methane production and accelerated substrate degradation at a suitable voltage.
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