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Method for treating spent caustic wastewater by utilizing halophilic microorganism

A technology for halophilic microorganisms and alkali slag wastewater, which is applied in biological water/sewage treatment, sedimentation treatment, water/sewage treatment, etc., can solve the problems of high investment cost, low treatment efficiency, complex operation process, etc., and achieve energy saving, Reduce costs, achieve economic and environmental benefits

Inactive Publication Date: 2018-02-27
浙江海牛环境科技股份有限公司
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Problems solved by technology

[0005] The above-mentioned alkali slag wastewater treatment has problems such as high investment cost, low treatment efficiency, and complicated operation process.

Method used

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  • Method for treating spent caustic wastewater by utilizing halophilic microorganism

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Embodiment Construction

[0019] The following is a detailed description of the embodiments of the present invention. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following cases .

[0020] Case 1

[0021] A refining and chemical company produces 600 cubic meters of alkali slag wastewater every year in the process of sweetening liquefied gas. This type of alkali slag contains sulfides, volatile phenols and other substances, which are highly toxic, high-concentrated, and difficult to degrade. General biochemical Law is basically impossible to deal with. Currently using CO 2 After neutralization, it is sent to the sewage treatment plant for treatment. Since the sulfide and volatile phenol in the alkali slag are highly irritating, this process has a great impact on the surrounding environment. The ...

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Abstract

The invention provides a method for treating spent caustic wastewater by utilizing halophilic microorganism. The method comprises the steps that the spent caustic wastewater is adsorbed by polyurethane sponge adsorption particles, then subjected to treatment through a halophilic microorganism reactor, and spent caustic wastewater treatment can be achieved after the spent caustic wastewater is treated through a hydrolysis acidification pool, a contact oxidation tank, a primary settling pond, an ozonator, a biological aerated filter, a second settling pond, an ultrafiltration membrane and a reverse osmosis membrane, meanwhile, recycling of oil is achieved, the energy is saved, the cost is lowered, and the purposes of economic benefits and environmental benefits are achieved at the same time.

Description

technical field [0001] The present invention relates to the field of waste water treatment, in particular to a method of using halophilic microorganisms to treat alkali-containing waste liquids such as sodium hydroxide, sulfide, mercaptan, phenol, oil, etc. produced by alkali washing and refining gasoline, diesel oil, and liquefied gas. processing. Background technique [0002] Petroleum refining process with petroleum as the main raw material is converted into gasoline, diesel, kerosene, lubricating oil, asphalt and other products through atmospheric and vacuum distillation, catalytic cracking, hydrocracking, delayed coking and other production methods, usually with 1%~ 10% sodium hydroxide solution is used to wash the oil to remove impurities, such as gasoline alkali washing, diesel alkali washing and liquid hydrocarbon refining. These waste lye is a highly corrosive solution, which is dark brown and has a foul smell. It is one of the main pollutants in my country's oil r...

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
CPCC02F1/285C02F1/441C02F1/444C02F1/78C02F3/30C02F3/34C02F9/00C02F2001/007C02F2103/365
Inventor 李超谢伟淼陆侨治
Owner 浙江海牛环境科技股份有限公司
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