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Method for treating or recycling waste water with high salt content and applications

A technology for wastewater treatment and high salt content, which is applied in biological water/sewage treatment, flotation water/sewage treatment, adsorbed water/sewage treatment, etc. and other problems, to achieve the effect of strong impact resistance, lower processing and operating costs, and less sludge production.

Inactive Publication Date: 2010-06-09
周兆宇
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional activated sludge method is used to treat high-salt wastewater, due to the high salt content in the wastewater, it is easy to cause sludge swelling in the activated sludge treatment system and high SS of the effluent, the treatment effect is poor, and the operation is very unstable.
Ordinary biofilm treatment process, such as biological filter, contact oxidation method, etc., although the shock load resistance capacity of the activated sludge process has been greatly improved, the effect is not ideal when dealing with high-salt wastewater
The wetland treatment technology developed in recent years has the characteristics of simple operation and low operating cost, but it occupies a large area, and when treating high-salt wastewater, it is easy to cause land salinization after long-term operation
Therefore, in the treatment of high-saline wastewater, there is currently no reliable treatment technology, and it is imperative to seek new biological treatment methods.

Method used

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  • Method for treating or recycling waste water with high salt content and applications
  • Method for treating or recycling waste water with high salt content and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A large metallurgical enterprise in the north discharges 500m of saline sewage per day 3 / h, the salty sewage is the pre-membrane concentrated water of the first-stage reverse osmosis membrane in a second-stage reverse osmosis membrane device in the enterprise. The wastewater before concentration is mainly the comprehensive wastewater after sedimentation and filtration in the factory area. -4 times. At present, the company intends to treat the concentrated solution to reduce the amount of COD discharged by the company, meet the national emission reduction index requirements for the company, and realize the recycling of wastewater. Using "HABF+O 3 / BAC+ultrafiltration+reverse osmosis” is the main process to conduct a small test experiment on site. The experimental water flow rate is 40L / h, the effective volume of the HABF reaction tank is 240L, and it is divided into 5 stages of series operation. The hydraulic retention time is 6h, and the carrier is filled. The amount i...

Embodiment 2

[0023] Using HABF as the main process, a small test experiment was carried out in an oil field in North China. The experimental water flow rate was 4L / h, the effective volume of the HABF reaction tank was 16L, the hydraulic retention time was 4h, and the carrier loading was 60% (high-efficiency carrier accumulation The volume is 9.6L), and the inoculated microorganism is engineering bacteria (BCP35M). The influent water of the experiment is the effluent water after oil separation and air flotation in the oil production plant, with a salt content of 5000-10000mg / L. 5 , TOC, petroleum, SS and sulfide average concentration are 124.1mg / L, 62.5mg / L, 37.7mg / L, 19.7mg / L, 130.0mg / L and 19.7mg / L, effluent COD, BOD 5 , TOC, petroleum, SS and hydrogen sulfide average concentrations are 17.9mg / L, 5.9mg / L, 9.7mg / L, 1.9mg / L, 10.9mg / L and 0.002mg / L respectively, COD, BOD 5 , TOC, petroleum, SS and hydrogen sulfide average removal rate reached 85.6%, 90.6%, 74.4%, 90.5%, 91.6% and 100%.

Embodiment 3

[0025] The sewage treatment plant of a petroleum refining and chemical enterprise in the north adopts the "old three" process of oil separation, flotation, and blast aeration, without water quality and quantity adjustment measures, and sulfur-containing sewage is stripped to purify water, alkali residue sewage, and oily sewage Combined treatment is adopted in the treatment site, so it is often impacted by the changes of excessive quality and excess sewage. At the same time, with the expansion of oil refining scale and the continuous improvement of production equipment reconstruction and expansion, the total amount of sewage discharge is increasing day by day, and with the continuous increase of crude oil processing volume and processing depth, the pollutant load in sewage discharged from equipment continues to increase, resulting in existing It is difficult for sewage treatment plants to meet the needs of production and the requirements of discharge standards. According to the...

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Abstract

The invention provides a method for treating or recycling waste water with a high salt content and applications. The method adopts combination processes of pretreatment, a high-efficiency aeration biological filter and depth treatment; and the detail process is shown in the description. The method of invention has the advantages of rapid degradation speed of the high-efficiency aeration biological filter to the pollutants in waste water, high treatment efficiency, good salt resistance, strong anti-impact capacity, stable operation and less sludge generation amount, and being beneficial for enrichment of halotolerant bacteria; the high-efficiency aeration biological filter is taken as a pretreatment process of the membrane treatment, which can effectively prevent membrane surface from scaling, prevent the membrane from being polluted and plugged by colloidal substances, suspended solid grains, organic matters and microorganisms, prolongs reverse purging period, increases the service life of the membrane, keeps stable water generation amount of a membrane system, thus lowering the operation cost. The invention is not only suitable for standard discharge or recycling of concentrated solution before the membrane separation in a membrane separation process, bus also suitable for treatment and recycling of waste water with a high salt content, such as oil extraction waste water and the like, and transformation and upgrading of the existing engineering.

Description

technical field [0001] The present invention relates to the field of waste water treatment and reuse, and more specifically, relates to a method and application of high-salt waste water treatment or reuse, including the preparation of the pre-membrane concentrate of the membrane separation process in domestic or municipal sewage and other water treatment projects. Standard discharge or reuse treatment, as well as wastewater treatment and reuse generated in petroleum, petrochemical, coal chemical and pharmaceutical industries, as well as existing engineering renovation and upgrading, are also applicable to the treatment and reuse of similar high-salt wastewater. Background technique [0002] With the wide application of membrane treatment technology in the water treatment industry, the treatment and disposal of the pre-membrane concentrated wastewater has become a new problem. Membrane separation is a physical treatment process. It only realizes the change of water quality th...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/40C02F1/24C02F3/12C02F1/78C02F1/28C02F1/44
CPCY02W10/10
Inventor 周兆宇曾华宗成坤
Owner 周兆宇
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