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Leachate treatment control system design and implementation

Author: ShiDongXiao
Tutor: ZhangWei；LiYueZhong
School: University of Electronic Science and Technology
Course: Software Engineering
Keywords: Landfill leachate Membrane bioreactor PID control
CLC: X703
Type: Master's thesis
Year: 2010
Downloads: 91
Quote: 2
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Abstract


As China's urbanization process is accelerating, rapid increase in the number of cities and population , the amount of garbage generated more than 10% annual rate of increase, the growing problem of waste disposal . At present , the domestic garbage treatment mainly sanitary landfill , incineration and composting , such as several treatments , regardless of the kind of treatment will produce a certain amount of landfill leachate . With the state's new \At present, the domestic demand for landfill leachate treatment process is the more successful treatment membrane bioreactor technology, is one of leachate treatment mainstream technology . Membrane bioreactor system is mainly biological treatment and membrane separation technology combination. The main principle of the system is the use of microorganisms to eliminate sewage biochemical part in a variety of organic pollutants, such as nitrogen , phosphorus compounds , etc. , advanced treatment mainly uses nanofiltration process , the system can efficiently separate recalcitrant organics in wastewater and some salts , whose main principle is applied under high pressure nanofiltration membrane separation technology for wastewater treatment . The key topics of membrane bioreactor technology for the treatment of landfill leachate basic research system process control system design and implementation , first introduced the topic background , as well as research content and meaning ; brief introduction to automatic control of field bus technology , PLC and configuration software for a simple introduction ; using Profibus and ModbuS fieldbus protocol , and combined membrane process characteristics and biochemical reactions to the actual situation of the control system design of communication networks , and real-time monitoring and recording leachate treatment process operating conditions, and site appears to respond to emergencies in a timely manner while the use of PC monitoring system designed to achieve the control network communications , field data logging and monitoring , and has a records check and alarm functions. The issue in the original leachate treatment automatic control system based on PID control technology to optimize program design to further adjust the blower opening between the frequency and the dissolved oxygen , acid pump and the relationship between the PH value , effectively reducing the processing system energy consumption .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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