NISCAIR Online Periodicals Repository

NISCAIR ONLINE PERIODICALS REPOSITORY (NOPR)  >
NISCAIR PUBLICATIONS >
Research Journals >
Indian Journal of Biotechnology (IJBT) >
IJBT Vol.09 [2010] >
IJBT Vol.09(3) [July 2010] >


Title: Studies on biphasic biomethanation of spoiled mango puree
Authors: Kirtane, R D
Suryawanshi, P C
Chaudhari, A B
Kothari, R M
Keywords: Acidification
biphasic methanogenesis
methane-rich biogas
spoiled mango puree
Issue Date: Jul-2010
Publisher: CSIR
Abstract: In a pilot-scale (175 L) study, spoiled mango puree (8.0-12.0% total solids) was subjected to biphasic biomethanation. For this purpose, an efficient phase separation between puree hydrolysis/acidification and its methanogenesis was achieved by using three acidogenic reactors (ARs) in series, operated aerobically at ambient temperature. The hydrolysate coming out of the AR series contained high percentage of volatile fatty acids (VFAs, 15,000-20,000 mg L-1), indicating efficient conversion of sugars. Subsequently, this hydrolysate was fed to two methanogenic reactors (MRs), operated anaerobically at 35±1.0°C. About 30% digestate from MRs was further recycled to ARs for enhancing the efficiency of hydrolytic activity. This arrangement permitted the maintenance of optimum pH in ARs at 4.5-5.5 range and an efficient anaerobic digestion in MRs as indicated by pH of the digestate in 7.2-7.8 range. The optimized conditions permitted, (i) an increase in feedstock initially from 2.0 to 10.0 L/d, (ii) methanogenic transformation of 15,000-20,000 mg L-1 VFAs, (iii) generation of 100±20 L d-1 biogas containing 65% methane initially and 550±25 L d-1 biogas with 78% methane upon stabilization over 180 d, (iv) digestate leaving MRs with 600-1200 mg L-1 VFAs, and (v) around 90% efficiency in terms of VFAs utilized.
Page(s): 308-312
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Source:IJBT Vol.09(3) [July 2010]

Files in This Item:

File Description SizeFormat
IJBT 9(3) 308-312.pdf184.43 kBAdobe PDFView/Open
 Current Page Visits: 931 
Recommend this item

 

National Knowledge Resources Consortium |  NISCAIR Website |  Contact us |  Feedback

Disclaimer: NISCAIR assumes no responsibility for the statements and opinions advanced by contributors. The editorial staff in its work of examining papers received for publication is helped, in an honorary capacity, by many distinguished engineers and scientists.

CC License Except where otherwise noted, the Articles on this site are licensed under Creative Commons License: CC Attribution-Noncommercial-No Derivative Works 2.5 India

Copyright © 2012 The Council of Scientific and Industrial Research, New Delhi. All rights reserved.

Powered by DSpace Copyright © 2002-2007 MIT and Hewlett-Packard | Compliant to OAI-PMH V 2.0

Home Page Total Visits: 586755 since 06-Feb-2009  Last updated on 18-Sep-2014Webmaster: nopr@niscair.res.in