Pretreatment process for drinking water and treatment equipment thereof

A technology for pretreatment and drinking water, which can be used in return water treatment, non-polluted water treatment, water/sewage multi-stage treatment, etc., and can solve problems such as poor removal of organic matter.

Pending Publication Date: 2021-04-23
山东华城工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the drinking water pretreatment technology in the prior art is not effective in removing organic matter, the present invention provides a drinking water pretreatment process and its treatment equipment to solve the above technical problems

Method used

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  • Pretreatment process for drinking water and treatment equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A pre-ozone-biological fluidized bed feedwater pretreatment equipment includes an ozone contact tank 4 and a biological fluidized bed 7. Described ozone contact tank 4 top is provided with ozone contact tank water inlet 3 and reflux water inlet 11, and the bottom is provided with ozone contact tank water outlet 5 and ozone air inlet 15; Described ozone contact tank water inlet 3 and raw water inlet 1 is connected by a metering pump 2; the ozone inlet 15 is connected with the ozone generator 13 through a gas flow rotameter 14, and the ozone generator 13 is provided with an oxygen inlet 12; the lower part of the ozone contact pool 4 is located at The ozone air inlet 15 is provided with an air distribution device 17; the ozone air inlet 15 is located at the top of the ozone contact pool water outlet 5; the ozone contact pool water outlet 5 is connected to the biological fluidized bed water inlet 6; the biological The fluidized bed inlet 6 is located at the bottom of the bi...

Embodiment 2

[0024] The raw water is treated by using the water supply pretreatment equipment in Example 1. Raw water pH before treatment = 7.5, COD: 10mg / L, turbidity: 4.09NTU, ammonia nitrogen: 0.26mg / L, UV 254 : 0.0635cm -1 . Adopt the ozone-activated carbon biological fluidized bed pretreatment process of the present invention, wherein the ozone dosage is 2mg / L, the residence time of the water in the ozone contact tank is 30min, and the residence time of the water in the activated carbon biological fluidized bed is 20min, The expansion rate of the filler is 20%, and the effluent of the activated carbon biological fluidized bed is refluxed to the water inlet of the ozone contact tank according to the reflux ratio of 200%. The pretreated water was sampled and tested at the outlet of the biological fluidized bed, and the results were as follows: COD: 2.8mg / L; ammonia nitrogen: 0.13mg / L; turbidity: 3.79NTU; UV 254 : 0.0275cm -1 .

Embodiment 3

[0026] The raw water is treated by using the water supply pretreatment equipment in Example 1. Raw water pH before treatment = 7.5, COD: 12mg / L, turbidity: 4.53NTU, ammonia nitrogen: 0.30mg / L, UV 254 : 0.0618cm -1 . Adopt the ozone-activated carbon biological fluidized bed pretreatment process of the present invention, wherein the ozone dosage is 2mg / L, the residence time of the water in the ozone contact tank is 30min, and the residence time of the water in the activated carbon biological fluidized bed is 20min, The expansion rate of the filler is 20%, and the effluent of the activated carbon biological fluidized bed is refluxed to the water inlet of the ozone contact tank according to the reflux ratio of 200%. The pretreated water was sampled and tested at the outlet of the biological fluidized bed, and the results were as follows: COD: 3.5mg / L; ammonia nitrogen: 0.12mg / L; turbidity: 4.25NTU; UV 254 : 0.0269cm -1 .

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Abstract

The invention relates to a pretreatment process for drinking water and treatment equipment thereof, and belongs to the technical field of drinking water pretreatment. The pretreatment process comprises two process units, namely an ozone contact tank and a biological fluidized bed. The ozone contact tank adopts a gas-water convection mode, raw water enters the ozone contact tank from the upper end of the ozone contact tank through a metering pump, and ozone generated by an ozone generator is introduced into the ozone contact tank from the bottom of the reactor through a conveying pipe and a gas flowmeter. The lower part of the ozone contact tank is connected with the biological fluidized bed through the conveying pipe. The biological fluidized bed adopts an upward flow water inlet mode, effluent of the ozone contact tank automatically flows into the biological fluidized bed through a bottom water inlet by virtue of the conveying pipe, and effluent of the biological fluidized bed is discharged from an upper end water outlet. According to the invention, chemical oxidation and biological oxidation are integrated, an adsorption effect is also achieved, ozone and raw water are subjected to simple ozone contact oxidation in the ozone contact tank so that organic matters in the water are oxidized and degraded, and the biodegradability of the raw water is improved.

Description

technical field [0001] The invention relates to the technical field of drinking water pretreatment, in particular to a pretreatment process for drinking water and treatment equipment thereof. Background technique [0002] At present, the treatment process adopted by the vast majority of water plants in my country is still the traditional water purification process, that is, mixing-flocculation-sedimentation-filtration-disinfection. The conventional water treatment process has played a huge role in protecting the safety of human drinking water and promoting social and economic progress and development. However, with the development of social industrialization, the physical and chemical properties of water source water have undergone significant changes, and conventional water supply treatment processes can no longer meet the changes in water source water pollution. Relevant studies at home and abroad have shown that conventional processes are inefficient in removing dissolve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/02C02F101/30
CPCC02F1/78C02F3/34C02F2103/02C02F2301/04C02F2101/30
Inventor 张玉生姚俊孟繁芹江玉强谢海涛
Owner 山东华城工程技术有限公司
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