scholarly journals Bio-hydrogen production from thin stillage using conventional and acclimatized anaerobic digester sludge

2011 ◽  
Vol 36 (20) ◽  
pp. 12761-12769 ◽  
Author(s):  
Noha Nasr ◽  
Elsayed Elbeshbishy ◽  
Hisham Hafez ◽  
George Nakhla ◽  
M. Hesham El Naggar
Keyword(s):  
Hydrogen Production ◽  
Anaerobic Digester ◽  
Thin Stillage ◽  
Anaerobic Digester Sludge

Comparison of methane production by co-digesting fruit and vegetable waste with first stage and second stage anaerobic digester sludge from a two stage digester

2012 ◽  
Vol 65 (7) ◽  
pp. 1252-1257 ◽  
Author(s):  
Nathan D. Park ◽  
Ronald W. Thring ◽  
Steve S. Helle
Keyword(s):  
Methane Production ◽  
Anaerobic Digester ◽  
Batch Reactors ◽  
Vegetable Waste ◽  
Fruit And Vegetable ◽  
Methane Generation ◽  
Second Stage ◽  
Substrate Ratio ◽  
Sewer Sludge ◽  
Anaerobic Digester Sludge

Fruit and vegetable waste (FVW) was co-digested with first stage (FSS) and second stage anaerobic digester sludge (SSS) separately, over the course of 10 days, in batch reactors. Addition of FVW significantly increased the methane production in both sludges. After 10 days of digestion FSS + FVW produced 514 ± 57 L CH4 kg VS−1added compared with 392 ± 16 L CH4 for the SSS + FVW. The increased methane yield was most likely due to the higher inoculum substrate ratio of the FSS. The final VS and COD contents of the sewer sludge and FVW mixtures were not significantly different from the control values suggesting that all of the FVW added was degraded within 10 days. It is recommended that FVW be added to the first stage of the anaerobic digester in order to maximize methane generation.

Fermentative hydrogen production in a system using anaerobic digester sludge without heat treatment as a biomass source

2005 ◽  
Vol 52 (1-2) ◽  
pp. 139-144 ◽  
Author(s):  
I. Shizas ◽  
D.M. Bagley
Keyword(s):  
Heat Treatment ◽  
Anaerobic Fermentation ◽  
Low Ph ◽  
Anaerobic Digester ◽  
Operational Parameters ◽  
Fermentative Hydrogen Production ◽  
Heat Treated ◽  
Hydrogenotrophic Methanogens ◽  
Fermentative Hydrogen ◽  
Anaerobic Digester Sludge

Hydrogen produced from anaerobic fermentation of organic matter is a sustainable energy source. Anaerobic hydrogen-producing systems have been typically seeded with heat-treated inocula to eliminate hydrogen-consuming methanogens. This can be both energy- and economically-intensive. In this work, operational parameters were modified to determine if operating a reactor at low pH (5.5) and low SRT (10 hours) would result in a hydrogen-producing system free of methanogens using anaerobic digester sludge with no heat treatment as an inoculum. Initially, the reactor exhibited a hydrogen productivity of approximately 7.9% when fed glucose. After purging was begun with 10% CO2/90% N2, the hydrogen productivity increased to >20% for the first day. Hydrogenotrophic methanogens then established themselves in the reactor, reducing the hydrogen productivity in the second non-purged phase by 80%. The operational controls examined were not sufficient to eliminate hydrogen-consuming methanogens for longer than approximately one week, and thus further methods must be developed.

Effects of Anaerobic Digester Sludge Age on Odors from Dewatered Biosolids

2006 ◽  
Vol 2006 (12) ◽  
pp. 1119-1141 ◽  
Author(s):  
Nitin Verma ◽  
Chul Park ◽  
John T. Novak ◽  
Zeynep Erdal ◽  
Bob Forbes ◽  
...  
Keyword(s):  
Anaerobic Digester ◽  
Anaerobic Digester Sludge
Sign in / Sign up

Export Citation Format

Share Document