Introduction
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| Zoom: Batch Sewage Treatment System |
In a batch tank, analyzers such as dissolved oxygen (DO) analyzers, oxidation-reduction potential (ORP) meters, and mixed liquor suspended solid (MLSS) analyzers are used. To reduce the maintenance frequency, measures must be taken to prevent dirt accumulation on the sensor. As the liquid level in a tank can vary greatly, great care should be taken when selecting the sensor installation position in a tank.
Expected Benefits
- Ensures stable, continuous measurement in heavily contaminated liquid
- Reduces operating costs
- Eliminates the need for manual cleaning
Process Overview
The batch treatment method is an intermittent sewage treatment method where a sequential process of sewage intake, aeration, settling, and drainage is performed repeatedly in a single reaction tank (batch tank). Characteristics of this method include:
- Stable treatment even if the sewage volume changes
- Compact facilities: requiring no settling tanks
- Removal of not only organic matter but also nitrogen and phosphorus
Field Data
Cleaning effectiveness testing of DO analyzer Output signal comparison between no cleaning and water jet cleaning
While an analyzer required maintenance approximately every two weeks when no cleaning was performed, a two-month maintenance interval was sufficient when water jet cleaning was performed.
Industries
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Wastewater Treatment
Wastewater treatment plants involve many pieces of equipment such as motors, pumps and blowers, which makes it important to reduce their electricity consumption and save running costs. Yokogawa provides optimum control solutions with digital technologies to improve energy efficiency.
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Water & Wastewater
Water resources are finite, and therefore contributing to a sustainable water cycle is one of the Sustainable Development Goals (SDGs). Yokogawa has been providing advanced digital control solutions for the stable supply of clean and safe water, wastewater treatment for protecting the water environment, water loss management and optimization of plant operation for reducing CO2 emissions and running costs. With our leading-edge technologies, dependable products and extensive expertise and experience of diverse water projects around the world, we work with you to provide sustainable water solutions that boost your business and add value throughout the plant lifecycle.
Yokogawa supports a wide range of water control applications in both the municipal and industrial water markets.
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Water Treatment
Yokogawa provides optimum solutions to improve the reliable operation of water treatment plants. These solutions include sophisticated technologies, unsurpassed product quality, and extensive application know-how throughout the lifecycle.
Related Products & Solutions
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MLSS Analyzers SS400G, SS300G
The SS400G, SS300G MLSS analyzers continuously and consistently measure the concentration of mixed liquor suspended solids (MLSS) in an activated-sludge treatment process found in sewage or industrial wastewater treatment facilities.
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Dissolved Oxygen Sensors
Dissolved Oxygen (DO) electrodes and sensors are the sensing portions of a DO measurement. There are three common technologies for dissolved oxygen measurements: polographic, galvanic and optical. Various installation options including floating ball, retractable, flow thru, immersion, and direct insertion.