June 11.2025
Wastewater Treatment System
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| Project Background With continuously rising environmental standards, modern wastewater treatment plants require precise management of the entire process, including pre-treatment, biochemical reaction, sedimentation, and disinfection. In harsh operating environments characterized by high humidity and corrosive gases, the control system must coordinate diverse equipment (flow sensors, dissolved oxygen monitors, etc.) in real-time while resisting both chemical corrosion and electromagnetic interference. Traditional distributed I/O systems face severe reliability challenges. These plants must implement millisecond-precision management throughout the entire process; any parameter deviation in any stage may result in effluent non-compliance, facing substantial fines or even suspension risks. | |
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| Efficient and Reliable Professional Solution | |
| To meet the complex, harsh operating environment and high-precision control demands of wastewater treatment plants, the system utilizes the Siemens S7-1200 PLC as the core controller. This PLC features extremely fast instruction execution and a wide operating temperature range, ensuring stable performance in high-humidity, high-electromagnetic-interference settings. Its integrated communication interfaces enable high-speed data transmission, laying a solid foundation for precise process management. Simultaneously, the deployment of FATEK MC0EN remote I/O modules establishes a distributed acquisition network. Benefiting from excellent protective performance, these modules can be installed directly in high-risk areas like aeration tanks and sedimentation tanks, effectively overcoming the wiring difficulties and signal attenuation issues inherent in traditional centralized control. Within the multi-layer collaborative architecture, the MC0EN remote I/O modules serve as critical bridges. They efficiently integrate various monitoring devices such as flow meters, dissolved oxygen analyzers, and pH sensors, rapidly and accurately collecting key data during the treatment process; Concurrently, acting as vital hubs for control execution, they output control signals to equipment like mixer VFD panels, dosing pump sets, and sludge return valves. Control logic employs advanced algorithms for mixers, adjusting speed based on dissolved oxygen levels; dosing pump sets utilize closed-loop control with flow feedback for precise chemical dosing; Sludge return valves dynamically adjust the return ratio based on sludge concentration in the sedimentation tank, ensuring optimal Mixed Liquor Suspended Solids (MLSS) levels within the bioreactors for stable, efficient operation at every stage. | |
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| FATEK Makes You Stand Out ► Reliable Operation in Harsh Environments MC0EN remote IO features high protection level and anti-vibration design, significantly extending module lifespan under severe working conditions. Optimized design reduces the number of IO modules in electrical cabinets, effectively lowering overall system failure risk and significantly decreasing process interruption times caused by signal anomalies. ► Efficiency Breakthrough in Multi-Device Coordination Enables real-time interaction of dissolved oxygen and pH data. FHB millisecond-level transmission drives precise response of the dosing system, significantly enhancing control accuracy of dissolved oxygen concentration in aeration tanks. Siemens PLC, based on MC0EN, captures real-time flow trend changes in the pretreatment tank and automatically adjusts the operating frequency of lift pumps to achieve optimal energy efficiency configuration. ► Operation and Maintenance Monitoring MC0EN remote IO supports knob hardware IP setting and module status indicator. Faulty stations are located within seconds, leading to a quantum leap in maintenance response speed. | |
| ► Convenient Future Equipment Upgrades MC0EN remote IO dual Ethernet port daisy-chain topology eliminates the need for additional switches, causing a precipitous drop in wiring costs for 200-meter cross-tank area runs. 64-module expansion capability supports sludge dewatering line capacity increase. System upgrades require no control cabinet modifications. | |
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| FATEK Products Selected in the Solution |
