fulltext.study @t Gmail

Improving nitrogen removal using on-line sensors in the A/O process

Paper ID Volume ID Publish Year Pages File Format Full-Text
5023 271 2006 8 PDF Available
Title
Improving nitrogen removal using on-line sensors in the A/O process
Abstract

A bench-scale anoxic–oxic (A/O) system was used to treat a synthetic starch wastewater for 1 year. The objectives were to improve nitrogen removal and reduce operating costs by using on-line sensors DO, pH and ORP. It is found that the DO in the first aerobic zone could be used to estimate influent ammonia load under constant aeration. The pH profiles and DO profiles along the length of aerobic zones give good indication of the nitrification, and the pH profiles in the aerobic zones and anoxic zones could be classified into two types: descending and rising type. Further, ORP value at the end of aerobic zone showed a good correlation with the effluent ammonia and nitrate nitrogen concentration, good effluent quality corresponded with the range of 40–60 mV of ORP in this study. ORP was also correlated well with nitrate concentration at the end of anoxic zone, and the maximum denitrification capacity could be achieved when ORP was maintained at about −90 mV. A fuzzy inference system for on-line aeration, nitrate recirculation flow and external carbon dosage control is developed on the basis of these observations and is implemented on the bench-scale system. Promising control performance is achieved.

Keywords
DO; pH; ORP; A/O process; Nitrogen removal
First Page Preview
Improving nitrogen removal using on-line sensors in the A/O process
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: Biochemical Engineering Journal - Volume 31, Issue 1, 1 August 2006, Pages 48–55
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