Improvement of multi-parameter-based feed-forward coagulant dosing control systems with feed-back functionalities

Coagulant dosing control in drinking and wastewater treatment plants (WWTPs) is often limited to flow proportional concepts. The advanced multi-parameter-based dosing control systems have significantly reduced coagulant consumption and improved outlet qualities. Due to the long retention time in sep...

Full description

Saved in:
Bibliographic Details
Published in:Water science and technology 2016-07, Vol.74 (2), p.491-499
Main Authors: Liu, W, Ratnaweera, H
Format: Article
Language:English
Subjects:
Case studies
Coagulants
Coagulants - analysis
Coagulants - chemistry
Coagulants - metabolism
Control
Control systems
Dosage
Drinking water
Feeds
Models, Theoretical
Retention time
Science
Sensors
Separation
Software
Waste Disposal, Fluid - instrumentation
Waste Disposal, Fluid - methods
Waste Water - analysis
Wastewater
Wastewater treatment
Wastewater treatment plants
Water Pollutants, Chemical - chemistry
Water Purification - instrumentation
Water Purification - methods
Water treatment
Water treatment plants
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Coagulant dosing control in drinking and wastewater treatment plants (WWTPs) is often limited to flow proportional concepts. The advanced multi-parameter-based dosing control systems have significantly reduced coagulant consumption and improved outlet qualities. Due to the long retention time in separation stages, these models are mostly based on feed-forward (FF) models. This paper demonstrates the improvement of such models with feed-back (FB) concepts with simplifications, making it possible to use even in systems with long separation stages. Full-scale case studies from a drinking water treatment plant and a WWTP are presented. The model qualities were improved by the dosage adjustment of the FB model, ranging from 66% to 197% of the FF model. Hence, the outlet qualities became more stable and coagulant consumption was further reduced in the range of 3.7%-15.5%.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2016.180