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Construction wastewater purifying and reusing system of temporary concrete mixing station for highway construction

A waste water purification and concrete technology, applied in multi-stage water treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of lack of oil removal function, large floor space, high engineering cost, and increase hydraulic retention. time, improve the effect of sediment purification, good removal effect

Active Publication Date: 2019-07-16
CHINA ACAD OF TRANSPORTATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a construction waste water purification and reuse treatment system for road construction temporary concrete mixing plants, which can effectively overcome the low purification efficiency, large floor area, high engineering cost and maintenance problems in the prior art. The shortcomings and problems such as complicated management and lack of degreasing function are aimed at the large amount of wastewater generated in the temporary concrete mixing station of road construction, which mainly has pollutants such as stone, sand, cement, suspended particulate matter (SS), petroleum oil, etc. Stable and efficient removal effect, and at the same time, it can realize the segmented removal, classified collection and recycling of stone, sand, cement and water

Method used

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  • Construction wastewater purifying and reusing system of temporary concrete mixing station for highway construction
  • Construction wastewater purifying and reusing system of temporary concrete mixing station for highway construction
  • Construction wastewater purifying and reusing system of temporary concrete mixing station for highway construction

Examples

Experimental program
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Effect test

Embodiment 1

[0066] A construction wastewater purification and reuse treatment method for a temporary concrete mixing station for road construction, specifically comprising: collecting wastewater from the mixing station area and washing wastewater from concrete transport vehicles through a grid 3 to remove large-sized stones, and then concentrating them into The primary settling tank 4 enters the primary sedimentation grease trap (6) through the overflow hole (5), adds flocculant, and after sedimentation and oil separation purification, enters the secondary sedimentation filter tank 9 through the filter hole 8, and then enters the secondary sedimentation filter tank 9 through the filter hole 8. After sedimentation and filtration, enter the three-stage sedimentation filter tank 11 through the filter hole 10, and after further precipitation and filtration, enter the reuse water pool 13 through the filter hole 12, and carry out comprehensive utilization of the treated waste water by the reuse w...

experiment example 1

[0068] Experimental Example 1 For the specific road construction temporary concrete mixing station construction wastewater purification and reuse treatment method, see Example 1, wherein polyaluminum chloride (PAC) is added to the primary sedimentation grease trap as a flocculant.

experiment example 2

[0069] Experimental Example 2 For the specific road construction temporary concrete mixing station construction waste water purification and reuse treatment method, see Example 1, wherein polyferric sulfate (PFS) is added to the primary sedimentation grease trap as a flocculant.

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Abstract

The invention relates to a construction wastewater purifying and reusing system of a temporary concrete mixing station for highway construction, belongs to the field of environmental protection systems in highway engineering construction, and particularly provides a method and technology for conducting comprehensive purifying treatment and classified collection of grating screening, natural sedimentation, oil removal, filtering and the like on construction wastewater of the temporary concrete mixing station for highway construction. The mixing station wastewater subjected to purifying treatment can be subjected to overflow discharging or used in the mixing station for flushing sites, cleaning tankers, conducting greening and the like, and materials of stone, sand, cement and the like whichare subjected to classified and regional collection can be subjected to classified recycle, so that effects of discharging of the wastewater and waste residues on the ecological environment and the water environment are reduced.

Description

technical field [0001] The method and system proposed by the present invention can be used for comprehensive purification and reuse of construction waste water, flushing waste water and field rainwater of temporarily installed concrete mixing plants in road construction, water quality purification of construction waste water of stations near sensitive water bodies, and Construction waste water and other fields such as sewage purification treatment with similar water quality characteristics to concrete mixing station construction waste water. Background technique [0002] With the rapid development of the national economy, the construction of road transportation infrastructure has ushered in a new golden period and a period of major opportunities. At the same time as the development of expressways, the reconstruction of national and provincial trunk lines and the construction of rural roads have also ushered in a new development climax. These A large part of highway engineeri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F9/00C02F1/001C02F2001/007C02F1/40C02F1/5281C02F1/5236C02F2301/08
Inventor 陶双成姚嘉林李云鹏高硕晗熊新竹孔亚平王倜王新军刘学欣
Owner CHINA ACAD OF TRANSPORTATION SCI
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