Water treatment method and device

Abstract

Provided is a water treatment method and a water treatment apparatus for elctrolyzing the water to be treated by detecting the quality and quantity of the water to be treated and adjusting the electrolytic density according to the state of the water to be treated. When sewage is treated by immersing electrodes 11A, 12A, 11B, 12B, 11C and 12C for electrolysis in an electrolytic cell 15 in a sewer pipeline 1 and producing hypo-halogenous acid, ozone or active oxygen in the sewage, the states of the sewage before and/or after the treatment are detected with a flow rate sensor 16 and a turbidity sensor 17, and the number of the electrodes to be energized (the area to be energized) and/or electric power to be supplied to each of the electrodes are controlled according to the detection result.

Description

technical field [0001] The present invention relates to a water treatment method for using treated water containing organic substances such as sewage and rainwater as reclaimed water, or for circulating and purifying treated water containing organic substances such as swimming pools and public baths and a water treatment device, particularly a water treatment device for treating water to be treated by electrochemical means by electrolysis using multipolar electrodes. Background technique [0002] The existing sewage treatment system is composed of the following parts: the sewage and rainwater discharged from various households, factories, etc. A confluence sewer composed of sewer pipes; a pumping station used to transport the sewer collected by the confluence sewer to the treatment plant as a transfer; a sewer treatment plant that purifies and discharges the transported sewer to rivers or seas and other discharge waters. [0003] Generally, sewage and rainwater from househo...

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Problems solved by technology

[0005] However, at this time, the electrolytic intensity of the electrochemical treatment, that is, the degree of electrolytic treatment cannot be changed according to the flow rate and water quality of the sewage. , there is a problem that the processing capacity is not enough when the sewage that is different from the normal water quality or flow rate or the sewage that is more polluted than the normal water quality flows into the sewer pipe

On the other hand, when water treatment is performed with excess electrolytic treatment capacity on the premise of treating a flow different from the usual water quality and flow rate or polluted sewage, there is a problem that the electrolytic treatment capacity is leftover, resulting in excess operating costs

[0013] However, in the existing multipolar water treatment device as described above, since the surface opposite to the electrode side existing between these power supply electrodes on the structure, that is, the outer surface is also used for water treatment, therefore, from the In some cases, the current leaking from the outside may flow directly to other power supply electrodes without passing through the electrodes between the power supply electrodes. This configuration cannot sufficiently suppress the leakage current.

Therefore, there is a problem that the reduction in current efficiency cannot be sufficiently avoided, and the improvement in processing efficiency corresponding to the energized current cannot be achieved.

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