Device and method for in-situ online monitoring of biological pool performance of sewage treatment plant

Abstract

The invention discloses a device and a method for in-situ online monitoring of biological pool performance of a sewage treatment plant. The device comprises a water inlet system, a reaction system, atemperature detection and maintenance system, a data detection system, a logic control and data processing system and a feed liquid quantitative supplementing system, the performance of the activatedsludge is rapidly and directly measured, so that a sewage treatment operator can obtain the running state of the biological tank in a short time. The device is unattended, the device and the detectionsensor are clean through the logic controller, the reaction system and the actual temperature are kept the same, online and measurement and automatic judgment of various data are realized, performance early warning and process adjustment suggestions are provided for operators, and the device is safe and convenient to operate and relatively high in efficiency. Operation is easy and convenient, maintenance is easy, and daily leakage inspection and regular electrolyte replacement are not needed; the equipment is simple in structure, does not contain components such as an electrolytic cell, is small in size and saves space.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a device and method for in-situ on-line monitoring of the performance of a biological pool of a sewage treatment plant. Background technique [0002] In the prior art, when monitoring the performance of biological pools in sewage treatment plants, most of them do not consider the influence of temperature on the measurement results. In fact, when the sewage temperature rises by 1 °C, the metabolic activity of microorganisms will increase by about 12%. Therefore, considering the impact of temperature on sludge activity influence is necessary. In order to ensure the accuracy of the test results, heating and heat preservation equipment can be used to maintain the temperature of the reaction system consistent with the test environment, but the overall complexity of the equipment and the risk of performance stability are increased. [0003] In addition, in the prior art, the ...

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Problems solved by technology

[0002] In the prior art, when monitoring the performance of biological pools in sewage treatment plants, most of them do not consider the influence of temperature on the measurement results. In fact, when the sewage temperature rises by 1 °C, the metabolic activity of microorganisms will increase by about 12%. Therefore, considering the impact of temperature on sludge activity the influence is necessary

In order to ensure the accuracy of the test results, heating and heat preservation equipment can be used to maintain the temperature of the reaction system consistent with the test environment, but the overall complexity of the equipment and the risk of performance stability are increased

[0003] In addition, in the prior art, the method of directly aerating the gas distributor is often used to increase the dissolved oxygen in the reactor, but if the aperture of the gas distributor is too large, the efficiency of aeration and oxygen enhancement will be too low, and if the aperture of the gas distributor is too small, pollution will easily occur. blockage, affecting the measurement of subsequent reaction time

When using the frequency conversion parameters of the blower to evaluate the performance of activated sludge, if the aeration pipe is too long in the actual working condition, the frequency conversion value has no reference value, and the measurement area often has its particularity, and there is often a relationship with the aeration state. In this case, the frequency conversion curve of the fan cannot represent the active state of the sludge in the biological pool

[0004] In the existing detection methods, the terminal MLSS is not representative, and the MLSS of the aeration tank body has a gradient distribution. Only the water taken out cannot represent the overall value, and the measured value is not easy to achieve stability. The deviation from the actual value is large, even after reaching stability, the measurement accuracy is poor

[0005] Stirring in the existing reaction system usually uses mechanical stirring of the stirring shaft and non-contact electromagnetic stirring, but the mechanical stirring of the stirring shaft has high requirements on the sealing and anti-corrosion of the stirring shaft, and the stirring magnet of the electromagnetic stirring is poor in stability. It is easy to lose the stirring function under the impact of water flow

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