Increasing safety in a wastewater treatment plant
Automatic dosing of flocculants for Phosphate elimination
The implementation of an automatic dosing of the flocculants allows the customer to respect (24h a day, 365 days a year) the limit for phosphate in the outlet and save a lot of money: resulting in less chemicals and sludge production.
The results
Saving of 26.000 €/year of flocculants (PAC)
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2% reduction of sludge production
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Even with a big peak of phosphate in the inlet, the outlet was under the official limit each time
Customer challenge
The inlet of this wastewater treatment plant is variable due to industrial high load wastewater. The manual dosing of flocculants was not enough to maintain the concentration of phosphate in the outlet under the official limit of 1 mg/l P total. The customer challenge is to respect the official outlet limit of Phosphate and manage the chemicals’ costs efficiently.
Our solution
The best way to reach this goals was to implement an automation system for chemical dosing which is based on phosphate measurement - in the outlet and in the inlet. The automation system (Liquicontrol-P) of Endress+Hauser was the only system who was able to measure both points:
By using the inlet Phosphate concentration the algorithm define the “stoichiometric“ quantity of flocculants.
By using the outlet phosphate concentration a predictive regulator increase or decrease the previous quantity of flocculants in order to follow the set-point that the customer can freely define for the outlet (in our case 0,8mg/l).
Solution components:
Instruments: Phosphate analyzer with 2 channel version (CA71PH, CAT221 for outlet, CAT221 for inlet)
Hardware: PLC (Rockwell Automation Allen Bradly® CompactLogixTM)
Software: Liquicontrol-P
Dosing pumps
Cabinet for outdoor installation of analyzer, electric box and pumps
Benefits
Keeping the official outlet limit of Phosphate at all times
Optimizing the plant safety of your wastewater treatment plant
Managing the chemicals cost efficiently
Reducte the production of sludge
FLEX 선택 | 기술적 우수성 | 단순성 |
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Fundamental 선택 기본적인 측정 요구사항 충족 |
기술적 우수성
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단순성
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Lean 선택 핵심 프로세스를 손쉽게 처리 |
기술적 우수성
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단순성
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Extended 선택 혁신적인 기술로 프로세스 최적화 |
기술적 우수성
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단순성
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Xpert 선택 가장 까다로운 어플리케이션 요구사항 충족 |
기술적 우수성
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단순성
구성에 따라 다름 |