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Nitrogen-removal bioreactor capable of simultaneous nitrification and denitrification for application to industrial wastewater treatment

Paper ID Volume ID Publish Year Pages File Format Full-Text
4417 225 2008 8 PDF Available
Title
Nitrogen-removal bioreactor capable of simultaneous nitrification and denitrification for application to industrial wastewater treatment
Abstract

A bioreactor system with 30 packed gel envelopes was installed in a thermal power plant for the removal of nitrogen from ammonia-containing desulfurization wastewater. Each envelope consisted of double-sided plate gels containing Nitrosomonas europaea and Paracoccus denitrificans cells with an internal space in between for injecting an electron donor. The envelope can remove ammonia from wastewater in a single step. When the wastewater was continuously treated with the bioreactor system, it removed 95.0% of the total nitrogen in the inlet, and the total nitrogen concentration in the outlet was below 9.0 mg L−1. The maximum nitrogen removal rate was 6.0 g day−1 per square meter of the gel area. The maximum utilization efficiency of the injected ethanol for denitrification was 98.4%, and the total organic carbon concentration in the outflow was maintained at a low level. Since the bioreactor system could use the electron donor effectively, it was not necessary to use an additional aerobic tank to remove the electron donor and a settling tank to segregate the surplus sludge containing bacteria from wastewater. Our concept of using packed gel envelopes would be highly effective for constructing a simple and efficient nitrogen removal system capable of simultaneous nitrification and denitrification.

Keywords
Nitrogen removal; Wastewater treatment; Bioreactor; Immobilized bacteria; Nitrification; Denitrification
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Nitrogen-removal bioreactor capable of simultaneous nitrification and denitrification for application to industrial wastewater treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 41, Issue 1, 1 August 2008, Pages 59–66
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