Flexible biogas production by pulse feeding maize silage or briquetted meadow grass into continuous stirred tank reactors. (October 2018)

• Record Type: Journal Article
• Authors: Feng, Lu; Ward, Alastair J.; Guixé, Pau Grima; Moset, Veronica; Møller, Henrik B.
• Is Part Of: Biosystems engineering. Volume 174(2018)
• Page Start: 239
• Page End: 248
• Publication Date: 2018-10
• Subjects: Flexibility -- Biogas -- Anaerobic digestion -- Maize silage -- Meadow grass; Bioengineering -- Periodicals; Agricultural engineering -- Periodicals; Biological systems -- Periodicals; Génie rural -- Périodiques; Systèmes biologiques -- Périodiques; 631
• DOI: 10.1016/j.biosystemseng.2018.07.013
• Languages: English
• ISSNs: 1537-5110

Abstract

Abstract : The flexible production of biogas by the pulse feeding of maize silage and briquetted meadow grass was investigated using laboratory and pilot scale continuous stirred tank reactors. Results show that pulse feeding can elevate biogas production in the short term, with the maize silage presenting greater flexibility compared to briquetted meadow grass at both laboratory and pilot scales. The cumulative biogas yield when feeding with maize silage significantly enhanced the yield by 130% within 24 h, with the yield gradually decreasing over 2 days but kept producing at least 20% more gas than the control during the following 4 days. By contrast, pulse feeding of briquetted meadow grass enhanced the biogas production by 30–32% at days 1 and 2 then decreased to a value similar to that measured before the pulse feeding. Graphical abstract: Image 1 Highlights: Flexible biogas production by pulse feeding was investigated at various scales. Maize silage and briquetted meadow grass were used for the pulse-feeding test. Maize silage shows higher flexibility than briquetted meadow grass.