fulltext.study @t Gmail

Biogas desulphurization at technical scale by lithotrophic denitrification: Integration of sulphide and nitrogen removal

Paper ID Volume ID Publish Year Pages File Format Full-Text
34878 45056 2011 7 PDF Available
Title
Biogas desulphurization at technical scale by lithotrophic denitrification: Integration of sulphide and nitrogen removal
Abstract

Biogas desulphurization was carried out in a continuous bioscrubber with a volume of 5 m3 using aerobically treated wastewater containing activated sludge and mixture of nitrate (NO3−) and nitrite (NO2−) as electron acceptors in industrial relevant conditions. Both nitrate and nitrite were provided from full-scale activated sludge treatment plant operated and controlled using dissolved oxygen and redox sensors to make sure nitrification performed and biogas was provided from anaerobic digester. The biogas flowrate changed from 5 to 25 m3/h and wastewater flowrate from 2.5 to 15 m3/h. The volumetric sulphide loading rates ranged between 2 and 22 kg S2− m−3 d−1. The optimum wastewater/biogas ratio observed for maximum H2S removal rates was in the range of 2–3 m3/m3 and minimum empty bed residence time (EBRT) determined was around 10 min. Nitrogen removal in the form of nitrate and nitrite was found to be proportional to sulphide removal. The redox potential of the effluent was also monitored and related to the wastewater/biogas ratio. More than 95% of H2S has been removed from biogas in this study when the volumetric sulphide loading rates were between 2 and 4 kg S2− m−3 d−1. This work reveals that sulphide removal can successfully be integrated to biological nitrogen removal (BNR) in industrial wastewater treatment systems.

Keywords
Biogas desulphurization; H2S removal; Lithotrophic denitrification; Nitrate and nitrite; ORP; Redox potential
First Page Preview
Biogas desulphurization at technical scale by lithotrophic denitrification: Integration of sulphide and nitrogen removal
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 46, Issue 4, April 2011, Pages 916–922
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us