期刊
PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING
卷 63, 期 1, 页码 65-72出版社
BUDAPEST UNIV TECHNOLOGY ECONOMICS
DOI: 10.3311/PPch.12334
关键词
anaerobic digestion; biofuel; biomass; microwave (MW) pretreatment; response surface methodology
资金
- National Key RD Plan of China [2017YFC1404605]
- Natural Science Foundation of China [51579049, 51509044]
- Fundamental Research Funds for the Central Universities [HEUCFG201820]
- High Tech Ship Program
In this study, optimization of microwave (MW) pretreatment conditions for anaerobic digestion of green microalgae (Enteromorpha) is carried out by using response surface methodology (RSM). MW power, pretreatment time and liquid-solid ratio were selected as independent variables for optimization. The optimum conditions were achieved at MW power, pretreatment time and liquid-solid ratio of 656.92 W, 5.10 min and 33.63:1, respectively. From these optimum conditions, it was found that MW pretreatment power of about 600 W had better effect. An anaerobic digestion was carried out batch-wise with working volume, operating temperature and mixing rate as 250 ml, 37 degrees C and 150 rpm, respectively. Optimum conditions provide highest amount of COD and reducing sugar increase of 10,420 mg/L and 0.77-0.79 g/L respectively. The increase in COD and reducing sugar showed that the pretreatment has improved anaerobic digestion of microalgae. The peak biogas production amount of MW pretreated 20:1, 6 min group reached 244 mL whereas the control group only reached 188 mL in total.
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