Impact of co-pretreatment of calcium hydroxide and steam explosion on anaerobic digestion efficiency with corn stover. Issue 12 (18th June 2017)

• Record Type: Journal Article
• Authors: Ji, Jinli; Zhang, Jiyu; Yang, Liutianyi; He, Yanfeng; Zhang, Ruihong; Liu, Guangqing; Chen, Chang
• Is Part Of: Environmental technology. Volume 38:Issue 12(2017)
• Page Start: 1465
• Page End: 1473
• Publication Date: 2017-06-18
• Subjects: Corn stover -- steam explosion -- calcium hydroxide -- co-pretreatment -- anaerobic digestion; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/09593330.2016.1234001
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: Anaerobic digestion (AD) is an effective way to utilize the abundant resource of corn stover (CS). In this light, Ca(OH)2 pretreatment alone, steam explosion (SE) pretreatment alone, and co-pretreatment of Ca(OH)2 and SE were applied to improve the digestion efficiency of CS. Results showed that AD of co-pretreated CS with 1.0% Ca(OH)2 and SE at 1.5 MPa achieved the highest cumulative methane yield of, which was 61.54% significantly higher ( p < .01) than untreated CS. The biodegradability value of CS after co-pretreatment enhanced from 43.03% to 69.52%. Methane yield could be well fitted by the first-order model and the modified Gompertz model. In addition, composition and structural changes of CS after pretreatment were analyzed by a fiber analyzer, scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction. The validated results indicated that co-pretreatment of Ca(OH)2 and SE was efficient to improve the digestion performance of CS and might be a suitable method for agricultural waste pretreatment in the future AD industry.