Table of Contents
ISRN Renewable Energy
Volume 2012, Article ID 904167, 6 pages
Research Article

Vehicular Quality Biomethane Production from Biogas by Using an Automated Water Scrubbing System

1Department of Farm Power & Machinery, College of Agricultural Engineering & Post Harvest Technology, Central Agricultural University, Ranipool, Gangtok, Sikkim 737 135, India
2Centre for Rural Development & Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India
3Department of Mechanical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110 016, India

Received 3 April 2012; Accepted 2 May 2012

Academic Editors: R. S. Adhikari and S. S. Kalligeros

Copyright © 2012 R. Chandra et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper presents the results of an automated water scrubbing system used for enrichment of methane content in the biogas, to produce vehicular grade biomethane fuel. Incorporation of automatic control systems for precisely regulating the water level and maintaining constant operating pressure in the packed bed absorption column of water scrubbing system resulted in steady-state operation of the scrubbing system and a consistent supply of methane-enriched biogas from the gas outlet. The improved automated water scrubbing system was found to enrich 97% methane at an operating column pressure of 1.0 MPa with 2.5 m3/h biogas in-flow rate and 2.0 m3/h water in-flow rate into the scrubbing column unit.