Dual-frequency ultrasound combined with alkali pretreatment of corn stalk for enhanced biogas production

被引：47
作者：
Dong, Cuiying [1 ,2 ]
Chen, Juan [1 ]
Guan, Ruolin [3 ]
Li, Xiujin [3 ]
Xin, Yuefeng [1 ]
机构：
[1] Beijing Univ Chem Technol, Coll Informat Sci & Technol, Beijing 100029, Peoples R China
[2] Tangshan Univ, Intelligence & Informat Engn Coll, Lubei Dist 063000, Tangshan, Peoples R China
[3] Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
来源：
RENEWABLE ENERGY | 2018年 / 127卷
基金：
中国国家自然科学基金;
关键词：
Corn stalk; Dual-frequency ultrasound pretreatment; Combined pretreatment; WHEAT-STRAW; ANAEROBIC-DIGESTION; LIGNOCELLULOSIC BIOMASS; METHANE PRODUCTION; RICE STRAW; STOVER; OPTIMIZATION; HYDROLYSIS; INCREASE;
D O I：
10.1016/j.renene.2018.03.088
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
To solve the problem of standing wave produced by single-frequency ultrasonic pretreatment, the dual-frequency ultrasound was applied to pretreat the corn stalk. In this paper, the mechanism of dual-frequency ultrasound was studied, and digital simulation results showed that the cavitation of dual-frequency ultrasound was more violent than that of single-frequency ultrasound, and its energy was more efficient. The anaerobic fermentation of corn stalk that was pretreated by dual-frequency ultrasound combined with alkali (Group 1) lasted for 53 days. The results showed that the cumulative biogas yield of Group 1 was 11.1%, 28.2% and 56.6% respectively higher than that of single-frequency ultrasound combined with alkali pretreatment (Group 2), alkali pretreatment (Group 3) and without pretreatment (Group 4). The TS removal rate of Group-1 was 9.9%, 25.0% and 71.4% respectively higher than that of other pretreatment samples, and the VS removal rate was 7.4%, 28.9% and 77.1% respectively higher than that of other group samples. The net energy of Group 1 was 32.2%, 114.9% and 19.7% higher than that of Group 2, Group 3 and Group 4. (C) 2018 Elsevier Ltd. All rights reserved.
引用
收藏
页码：444 / 451
页数：8
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