JPS6279893A - Decoloring device for water by ozone - Google Patents

Abstract

PURPOSE:To make possible the chromaticity of treated water uniform and to economize electric power by subjecting the water to be treated to a decoloring treatment with an ozone-contg. gas, measuring the UV absorptivity of the treated water by a UV meter and regulating the voltage of an ozone generator by the value of the UV meter. CONSTITUTION:The water to be treated is subjected to the decoloring treatment with the ozone-contg. gas in a treating means 1. The UV absorptivity of the treated water treated by the means 1 is measured in the UV meter 3 and further the voltage is regulated by the value of the meter 3 in the ozone generator 4. More specifically, the UV meter is installed as a COD monitor to monitor the condition of the treatment by measuring the COD component in the treatment water in an ordinary waste water treatment facility and therefore, the UV meter can be made usable commonly for monitoring the decoloration. The need for the cost and space of installation is thus eliminated. Since the amt. of the ozone to be generated by the ozonizer is adjusted by converting the chromaticity of the treated water by the UV valve, the chromaticity of the treated water is made uniform and the electric power is effectively economized.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention is a water treatment facility in which colored wastewater (water to be treated) is oxidized using an ozone-containing gasket generated by an ozone generator, and then decolorized. This invention relates to a device for decolorizing water using ozone.

(Prior art) The pigments in the treated water discharged from wastewater treatment plants are high-molecular organic substances such as stercopyrine, which are cyclic compounds that are decomposed into low-molecular compounds by the oxidizing power of ozone and decolorized. .

Approximately 40% of the operating cost of a treatment plant that lacks an ozonizer and also decolorizes wastewater is electricity, with the ozonizer accounting for most of that electricity cost. Therefore, in order to reduce the electricity cost required for the ozonizer, waste ozone, which is the waste gas after aerating with wastewater and ozone-containing gas, is detected with a waste ozone detection device, and the ozonizer's ozone generation is automatically controlled depending on the value of waste ozone. Things are being done.

(Problem to be solved by the invention) However, the device must be equipped with a waste ozone detection device.
Requires cost, installation space, etc.

(First Means for Solving Problems) The present invention provides a treatment means for decolorizing water to be treated using an ozone-containing gas, a plan for measuring the ultraviolet absorbance of treated water treated by the treatment means, and a W meter. It is characterized by consisting of an ozone generator whose voltage is adjusted according to the value of .

(Function) Organic substances in water that color the water to be treated have different absorption spectra in the ultraviolet region; It's thick (appears T'L).

The present invention measures the amount of organic matter absorbed in the ultraviolet region, that is, the ultraviolet absorbance with a 9UV meter, and uses the UV value to estimate the extent of decolorization by converting the treated water into colored charcoal, and then amplifies the output of the charcoal to generate an ozonizer. The voltage is adjusted and the amount of ozone generated is automatically controlled.

(Example) In the illustrated example, / indicates a processing means having a decolorizing section J%', 3 indicates a total, and q indicates an ozonizer. The decolorizing section is located at the bottom of the diffuser tube 1' where an ozonizer q is generated and ozone-containing gas is spouted out, and the decolorizing section 11 decolorizes the water and discharges the constant treated water to the discharge bit 5. In this embodiment, the UVVB2 sensor 3' is thrown into the discharge pit s, the UV meter measures the ultraviolet absorbance of the treated water in the discharge pit, and the current (q - 20 mh) detected by the α meter 3 is The upper and lower limit setter B is entered, and the set value missing r'L or the relay is activated and the control device 7 is entered.

This control device 7 is activated by an external timer g, and a built-in timer raises and lowers the induced voltage regulator 9.
Feedback is fed back to the secondary voltage control device to adjust the lower limit voltage -f', and the step-up transformer IO adjusts the voltage of the ozonizer to control the amount of ozone generated. The contained gas is supplied to the diffuser pipe-'.

Incidentally, the sensor 3' is limited to being installed in the discharge pit s, and the treated water supply pipe from the decolorizing section to the discharge pit 5,
It may also be provided in the discharge pipe from the discharge pit.

(Effect of the invention) In ordinary wastewater treatment facilities, a double meter is installed as a COD monitor to measure the COD content in the treated water and monitor the treatment status. In that case, cost and installation space are not required.In addition, the chromaticity of the treated water is converted to UV value, and the ozone generation of the ozonizer is adjusted, making the chromaticity of the treated water uniform. In addition to being effective in saving electricity, it can also respond to changes in water quality because it is directly controlled by chromaticity.

[Brief explanation of drawings]

The drawing shows a 70-sheet of an embodiment of the present invention, in which / is a processing means, - is a decolorizing section thereof, 3 is a UV meter, and q is an ozonizer (not shown).

Claims (1)

[Claims] a treatment means for decolorizing the water to be treated with an ozone-containing gas;
An apparatus for decolorizing water using ozone, comprising a UV meter that measures the ultraviolet absorbance of treated water treated by the treatment means, and an ozone generator whose voltage is adjusted according to the value of the UV meter.