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首页> 外文会议>Signal Processing amp; Its Applications, 2009. CSPA 2009 >A low cost automatic control system for conductivity of small scale wastewater treatment
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A low cost automatic control system for conductivity of small scale wastewater treatment

机译：用于小规模废水处理的电导率的低成本自动控制系统

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This paper presents a design for a low cost 2-electrodes conductivity control system for small scale wastewater treatment system, such as that from etching process of printed circuit board. It involves the design of a conductivity sensing probe, its associated control circuitry and an actuation mechanism. The conductivity sensor applies a direct current to two electrodes and measures the potential voltage. The control circuitry computes the switching action of the actuation mechanism which acts in response to a specific level of conductivity. This control system determines whether the wastewater from the wastewater treatment system is clean enough to be discharged based on the water conductivity. Experimental result covered by this low cost conductivity control system ranges from 0.08 muS to 0.632 S and shows a switching voltage of 2.23 volts which corresponds to 20 muS, a requirement for treated water from small scale wastewater treatment system for etching process of printed circuit board. The wastewater is recycled when the water conductivity reaches above 20 muS while the wastewater is discharged otherwise.
机译：本文提出了一种用于小型废水处理系统的低成本两电极电导率控制系统的设计，例如印刷电路板的蚀刻工艺。它涉及电导率传感探头，其相关控制电路和致动机构的设计。电导率传感器向两个电极施加直流电并测量电势电压。控制电路计算致动机构的开关动作，该开关动作响应于特定的电导率水平而起作用。该控制系统基于水的电导率确定来自废水处理系统的废水是否足够清洁以至于可以排放。该低成本电导率控制系统涵盖的实验结果范围为0.08μS至0.632 S，显示的开关电压为2.23伏，相当于20μS，这是小型废水处理系统对印制电路板进行蚀刻处理所需的处理水。当水的电导率达到20μS以上时，将废水回收，否则将废水排放。

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