Effects of Alkali Pre-treatment, Total Solid Content, Substrate to Inoculum Ratio, and pH on Biogas Production from Anaerobic Digestion of Mango Leaves
文献类型： 外文期刊
作者： Abudi, Zaidun Naji 1 ; Hu, Zhiquan 1 ; Abood, Alkhafaji R. 3 ; Liu, Dongqi 1 ; Gao, Aiping 4 ;
作者机构： 1.Huazhong Univ Sci & Technol, Sch Environm Sci & Engn, Wuhan 430074, Peoples R China
2.Mustansiryiah Univ, Coll Engn, Baghdad, Iraq
3.ThiQar Univ, Coll Engn, Nasiriyah, Iraq
4.Chinese Acad Trop Agr Sci, Trop Crops Genet Resources Inst, Danzhou 571737, Hainan, Peoples R China
关键词： Mango leaves; NaOH pretreatment; Total solid content; Substrate to inoculum ratio; Kinetic models
期刊名称：WASTE AND BIOMASS VALORIZATION （ 影响因子：3.703； 五年影响因子：3.624 ）
ISSN： 1877-2641
年卷期： 2020 年 11 卷 3 期
页码：
收录情况： SCI
摘要： The present study investigated the effects of five parameters [alkali (NaOH) pretreatment (doses and durations), total solid (TS) content, substrate to inoculum ratio (S/I), and pH] on biogas production from anaerobic digestion of mango leaves. To evaluate these parameters effects 26 batch experiments were conducted. Which included: NaOH pretreatment (doses: 0, 0.1, 0.2, 0.3, and 0.4 mol/L and durations: 4, 6, 8, 10, and 12 h), TS content (4, 6, 8, 10%), S/I (15, 20, 25, and 30%), and pH (6.5, 7.0, 7.5, and 8.0). Also, the kinetics of biogas production was studied by using three models: first order kinetic, Cone, and modified Gompertz models. It was found that the optimum conditions were: NaOH dose with 0.2 mol/L, NaOH duration for 10 h, TS content with 8%, S/I ratio with 20%, and pH of 7.5. These optimum situations gave the highest production with 616.2, 644.0, 1968.4, 1467.2, and 1488.6 mL/gVS, respectively. Cone model showed the best fit followed by modified Gompertz model and finally first order kinetic model. These results proved the applicability of mango leaves as a good source for renewable methane-rich energy, and the impact of NaOH pretreatment, TS, S/I, and pH on the biogas/methane yield.
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