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Grey water producing device and method

A technology for manufacturing devices and control devices, which can be applied in the fields of oxidized water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., and can solve the problems of carcinogenicity, few practical examples, and no reported cases where disinfection by-products are problems. , to reduce costs

Inactive Publication Date: 2008-10-01
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a problem that sometimes carcinogenic disinfection by-products such as chloroform are produced
However, there are few practical examples, and there are no reported cases where disinfection by-products become a problem

Method used

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  • Grey water producing device and method
  • Grey water producing device and method
  • Grey water producing device and method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0033] figure 1 It is a reclaimed water production device according to the first embodiment of the present invention, and more specifically, it is a structural diagram of an operation mode of a sewage treatment process having a reclaimed water production function. The influent sewage 1 is treated by solid-liquid separation and organic matter / nutrient salt removal facilities 2 to form the influent water 3 of the reaction part of the disinfection active ingredient A.

[0034] In the solid-liquid separation and organic matter / nutrient removal facility 2, the solid-liquid separation takes a general sewage treatment plant as an example, and sets the initial sedimentation tank and the final sedimentation tank. For example, using a filter membrane instead of the final sedimentation tank, as long as it can separate the solid components and liquid components. Taking the general sewage treatment plant for removing organic matter / nutrient salt as an example, the activated sludge treatme...

no. 2 Embodiment approach

[0069] Figure 4 It is a structural diagram of the operation mode of the sewage treatment process according to the second embodiment of the present invention. In this example, the measurement of the water quality item a is not directly carried out, but is carried out by an indirect substitute measurement method. That is, the water quality item a treated water quality substitute index measuring device 30 is installed in the treated water 8 as a substitute measurement of the water quality item a. In addition, the water quality of the inflow water 3 flowing into the disinfection active ingredient A reaction part 5 is measured by the inflow water quality measuring device 4b only for the water quality item b. Moreover, the water quality of the water quality item b of the water quality item b of the inflow water 6 of the disinfection active ingredient B reaction part 7 is measured with the processing water quality measuring device 9c.

[0070] For example, ozone as the effective d...

no. 3 Embodiment approach

[0079] Image 6 It is a structural diagram of the operation mode of the reclaimed water production process using the third embodiment of the present invention. In this embodiment, ozone is shown as the active ingredient for disinfection A, water containing fine air bubbles is shown as the active ingredient for disinfection B, the number of living coliform bacteria as the water quality item a, and when the water quality item b is chromaticity example.

[0080] In the second embodiment, the concentration of residual chlorine is used as an evaluation index of the number of living coliform bacteria in the water quality item a. In this embodiment, the water quality item a is also evaluated using the chromaticity of the water quality item b. There are treated water quality measuring devices 9b and 9c, any of which can be used as a colorimeter in this embodiment.

[0081] As the treated water quality target value 12a, a target value of the residual rate of coliform bacteria can be...

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PUM

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Abstract

The invention provided an apparatus and a method for producing reusable water, in each of which reusable water of the water quality satisfying targeted values is produced and the sum total of operating costs required in the whole process is minimized. Inflow sewage 1 is treated by a solid separating and organic matter / nutritious salt removing unit 2 to obtain inflow water 3 to be made to flow in a disinfection-effective component A reaction part 5. The inflow water 3 is treated with a disinfection-effective component A18 in the reaction part 5 to obtain inflow water 6 to be made to enter a disinfection-effective component B reaction part 7. The inflow water 6 is treated with a disinfection-effective component B19 in the reaction part 7 to obtain reusable water as treated water 8. The targeted values 12a, 12b of the quality of treated water are given beforehand to a proper manipulated variable calculating means 13. An inflow water quality measuring instrument 4a or 4b takes in inflow water quality information 10a or 10b corresponding to the targeted value a or b and a treated water quality measuring instrument 9a or 9b takes in treated water quality information 11a or 11b corresponding to the targeted value 12a or 12b. The proper manipulated variable calculating means 13 calculates the optimum values of manipulated variables of the reaction parts 5, 7 and controls the reaction parts so that the targeted values of the quality of treated water are satisfied and the sum total of operating costs is minimized.

Description

technical field [0001] The invention relates to the sewage treatment process for purifying the inflowing sewage, in particular to the operation mode of the reclaimed water production process with the reusable reclaimed water production function. Background technique [0002] Reclaimed water is also called miscellaneous water because it can supply recycled water and rainwater from sewerage and industrial drainage as low-quality water for various purposes. Especially in water-scarce areas, the effective use of water is particularly important. There are many practical examples of reclaimed water being used as water for washing toilets, but it can also be used as water for sprinkling, cooling, and scenery. In addition, in principle, reclaimed water can be used as agricultural water and industrial water, and can also be used as part of raw water for Sheung Shui. [0003] In the reclaimed water production process in which the following water is used as raw water, the treatment m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/78C02F1/50
Inventor 阴山晃治渡边昭二圆佛伊智朗原直树
Owner HITACHI LTD