Effect of Activated Cow Dung as Inoculum on Methane Production of Steam-Exploded Rice Husks

Purpose To investigate methane production from a single substrate with steam explosion pretreatment and activated cow dung as natural resources for cellulolytic microflora to enhance biogas production from agricultural biomass waste. Methods The recalcitrant of the lignin-carbohydrate complex (LCC)...

Full description

Saved in:
Bibliographic Details
Published in:Waste and biomass valorization 2021-09, Vol.12 (9), p.5019-5028
Main Authors: Sholahuddin, Nakamura, Yoshitoshi, Asada, Chikako
Format: Article
Language:English
Subjects:
Activated sludge
Agricultural wastes
Anaerobic conditions
Anaerobic digestion
Anaerobic processes
Biogas
Carbohydrates
Cattle manure
Cellulose
Dung
Engineering
Environment
Environmental Engineering/Biotechnology
Explosions
Industrial Pollution Prevention
Inoculum
Methane
Microflora
Natural resources
Pretreatment
Raw materials
Renewable and Green Energy
Rice
Short Communication
Sludge
Steam explosions
Steaming
Substrates
Waste Management/Waste Technology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Purpose To investigate methane production from a single substrate with steam explosion pretreatment and activated cow dung as natural resources for cellulolytic microflora to enhance biogas production from agricultural biomass waste. Methods The recalcitrant of the lignin-carbohydrate complex (LCC) of rice husk was dismounted using a steam explosion pretreatment at 2.53 MPa (224 °C) for 5 and 7 min of steaming time, followed with and without water extraction. All the residue from the extraction process, either solid or liquid, was used for the biogas feedstock. Anaerobic digestion (AD) was conducted under mesophilic condition at 37 °C with two different inoculums: sludge and a mixed inoculum containing sludge and activated cow dung. The predicted methane production was calculated using the stoichiometric formula. Results The steam explosion pretreatment and mixed inoculum significantly enhanced the cumulative methane production. The 7-min steaming time led to the breaking up of 41% cellulose, and 199 ml/g of methane was produced from the total cumulative methane yield of the solid and liquid feedstock, with a 96.1% yield of the predicted methane amount. Conclusions The enhancement of methane production was achieved using a combination of steam explosion pretreatment and mixed inoculum between sludge and activated cow dung. Graphic abstract
ISSN:1877-2641
1877-265X
DOI:10.1007/s12649-021-01365-6