Water pollution organism early warning system and method based on principle of microbial fuel cells

An early warning system and fuel cell technology, applied in the direction of testing water, alarms, material inspection products, etc., can solve the problems of heavy maintenance workload, increased operating costs, limited use, etc., and achieve the effect of low maintenance cost and sensitive monitoring

Inactive Publication Date: 2012-05-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the existing biological early warning technologies mostly use luminescent bacteria, fish, etc. as the sensitive units of water quality sensors, but these technologies must keep the tested organisms in an active and sensitive life stage (such as the stable period), so due to the limitation of the growth cycle, it must be frequently Permanently replace the test organisms, not only the maintenance workload is large but also the operating cost is increased, which limits its use as an online continuous detection technology to a certain extent

Method used

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  • Water pollution organism early warning system and method based on principle of microbial fuel cells
  • Water pollution organism early warning system and method based on principle of microbial fuel cells
  • Water pollution organism early warning system and method based on principle of microbial fuel cells

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Experimental program
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Effect test

Embodiment 1

[0024] The anode chamber is inoculated with the mixture of sediment and water of the reservoir to be monitored. After about 3 days, the system starts up and uses self-dispensing water to simulate water inflow. The specific components are: CH 3 COONa 65.6mg / L, NH 4 Cl 60mg / L, KH 2 PO 4 176mg / L, K 2 HPO 4 136mg / L, KCl 4mg / L, CaCl 2 4mg / L, MgCl 2 4mg / L, 0.4mL trace metal elements, COD is about 50mg / L, adjust the external resistance so that the voltage is about 200mV, and the voltage signal is stable under normal water inlet conditions. At this time, the COD concentration of the influent water is suddenly switched to 100mg / L, and the voltage increases rapidly, such as image 3 As shown, the voltage increases by about 90% within 10 minutes, and the rate and range of change exceed the set threshold, and the system sends out an alarm. This shows that when non-acute toxic organic pollution occurs, the system can provide early warning to remind the water plant to take emergen...

Embodiment 2

[0026] The anode chamber is inoculated with the mixture of sediment and water in the reservoir to be monitored, and the system starts up about 3 days later, using self-dispensing water to simulate water inflow, the specific composition is: CH 3 COONa 65.6mg / L, NH 4 Cl 60mg / L, KH 2 PO 4 176mg / L, K 2 HPO 4 136mg / L, KCl 4mg / L, CaCl 2 4mg / L, MgCl 2 4mg / L, 0.4mL trace metal elements, COD is about 50mg / L, adjust the external resistance so that the voltage is about 200mV, the voltage signal is stable under normal water inlet conditions, and add 20mg / L copper ions, which is the concentration specified in the drinking water standard After 20 times of , the output voltage drops immediately, and the voltage drops below 50% of the initial voltage after 20 minutes, such as Figure 4 As shown, it shows that the concentration of copper ions has a significant effect on the metabolism of electrogenic bacteria. When such toxic heavy metal pollution occurs, the early warning system ca...

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Abstract

The invention provides a water pollution organism early warning system based on the principle of microbial fuel cells (MFC), characterized by comprising an MFC sensitive unit, a signal acquisition and processing unit and a remote warning unit, wherein the MFC sensitive unit adopts a three-in-one structure and a continuous flow between the anode and the cathode and contains no noble metal catalysts. The early warning system is installed in a water body to be monitored during online monitoring, raw water enters into the MFC sensitive unit, and the magnitude of external resistance is regulated so as to obtain maximum system sensitivity. The output voltage / current of the MFC sensitive unit is acquired by the signal acquisition and processing unit and is uploaded, stored and displayed on a display in real time after calculation processing. Once the signal changes and exceeds a threshold value, the signal acquisition and processing unit sends a warning cue signal to related monitoring stations and water plants through the remote warning unit. The early warning system and method has high sensitivity and low maintenance cost, and is an efficient unexpected water pollution organism early warning technology.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and in particular relates to a water quality online biological early warning system and method. Background technique [0002] The frequent occurrence of major water pollution emergencies has become one of the most serious environmental problems in China in recent years. The establishment of a complete monitoring system and emergency plan has become the consensus of governments at all levels and water companies in my country. In the monitoring system, it is generally divided into three levels: rapid early warning, deterministic detection and accurate authoritative detection. Among them, the rapid early warning link is the basis of the latter two levels of detection, which is crucial for striving for the best processing time and reducing major environmental and economic losses. important role. [0003] Biological monitoring, especially online biological monitoring technology, uses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08B21/12G08B25/10G01N33/18
CPCY02A20/20
Inventor 黄霞曹效鑫梁鹏夏雪陈熹魏锦程
Owner TSINGHUA UNIV
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