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Autotrophic nitrogen removal from sludge digester liquids in upflow sludge bed reactor with external aeration

Paper ID Volume ID Publish Year Pages File Format Full-Text
36043 45119 2006 6 PDF Available
Title
Autotrophic nitrogen removal from sludge digester liquids in upflow sludge bed reactor with external aeration
Abstract

The novel microbial process such as anaerobic ammonium oxidation (Anammox) and completely autotrophic nitrogen removal over nitrite (Canon) processes is promising biotechnology to remove nitrogen from ammonium-rich wastewater like anaerobic sludge liquid. In this research, a new Canon-type nitrogen removal process adopting upflow granular sludge bed configuration was investigated on its feasibility and process performance, using synthetic wastewater and sludge digester liquids. Air as an oxygen source was provided in an external aeration chamber with flow recirculation. In the first experiment using the synthetic wastewater (up to 110 mg NH4–N L−1), the ammonium removal was about 95% (92% for T–N) at HRT for 5 days. In the second experiment using the sludge digester liquids (438 ± 26 mg NH4–N L−1), the total nitrogen removal was 94 ± 1.7% at HRT for 7 days and 76 ± 1.5% at HRT for 5 days, respectively. Little nitrite and nitrate were observed in the effluent of both experiments. The process revealed quite lower oxygen (0.29–0.59 g O2 g−1 N) and less alkalinity (3.1–3.4 g CaCO3 g−1 N) consumption as compared to other new technology in microbial nitrogen removal. The process also offers the economical compact reactor configuration with excellent biomass retention, resulting in lower cost for investment and maintenance.

Keywords
Anammox; Canon; Hydroxylamine; Hydrazine; Granule; Nitrogen removal; Sludge digester liquids
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Autotrophic nitrogen removal from sludge digester liquids in upflow sludge bed reactor with external aeration
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 9, September 2006, Pages 1945–1950
Authors
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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