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An heterotrophic/autotrophic denitrification (HAD) approach for nitrate removal from drinking water

Paper ID Volume ID Publish Year Pages File Format Full-Text
36071 45120 2006 7 PDF Available
Title
An heterotrophic/autotrophic denitrification (HAD) approach for nitrate removal from drinking water
Abstract

An heterotrophic/autotrophic denitrification (HAD) approach supported by cotton and zero valent iron (ZVI) was proposed for nitrate removal from drinking water. Preliminary batch tests were performed to investigate the behaviour of ZVI and nitrate rich water system. Afterwards the HAD process was tested in continuous pilot-scale column reactors containing 380 g of cotton and 150–300 g of ZVI (R2–R4) and a blank reactor (R1) filled only with 380 g of cotton (cotton supported denitrification, CSD). The performance of the reactors was evaluated according to volumetric nitrate removal, stability with time and by-products formation.The HAD reactors, in particular, the HAD with 300 g of ZVI (R4), showed higher volumetric nitrate removal efficiencies (from 0.235 to 0.275 kg N m−3 day−1) than the CSD reactor (0.190 kg N m−3 day−1). Furthermore, released by-products such as soluble iron and ammonium were limited to very low levels (<0.095 and <1.25 mg l−1, respectively). The promising high performance obtained by the HAD shall be evaluated for in situ application as further study.

Keywords
Heterotrophic/autotrophic denitrification (HAD); Nitrate rich water; Solid supporting media; Cotton; Zero valent iron (ZVI); By-products
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An heterotrophic/autotrophic denitrification (HAD) approach for nitrate removal from drinking water
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 5, May 2006, Pages 1022–1028
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