Method for synchronously removing carbon, nitrogen and sulfur in wastewater

A technology for carbon nitrogen and waste water, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of complex process, inability to be widely used, huge engineering investment, etc., and achieve simple process , reduced operating costs, and high processing efficiency

Inactive Publication Date: 2014-04-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for synchronous removal of carbon, nitrogen and sulfur in wastewater to solve the problems of complex processes, huge engineering investment and inability to be widely used in the field of organic wastewater containing sulfur and nitrogen.

Method used

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  • Method for synchronously removing carbon, nitrogen and sulfur in wastewater
  • Method for synchronously removing carbon, nitrogen and sulfur in wastewater
  • Method for synchronously removing carbon, nitrogen and sulfur in wastewater

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specific Embodiment approach 1

[0018] Specific embodiment one: the method for synchronous removal of carbon, nitrogen and sulfur in the waste water of this embodiment is carried out according to the following steps:

[0019] 1. Acclimatization of microbial sludge rich in concurrent denitrification and desulfurization: in an anaerobic reactor, activated sludge is used as inoculation sludge, and a mixture of sulfide and nitrate and a mixture of organic matter and nitrate are used as substrates respectively. Alternately domesticate the sludge under autotrophic and heterotrophic conditions. When the removal rate of sulfide and nitrate is ≥85% under autotrophic condition, and the removal rate of organic matter and nitrate is ≥85% under heterotrophic condition, domestication is completed;

[0020] 2. In the anaerobic reactor that is rich in concurrent denitrification and desulfurization microbial sludge domesticated in step one, feed the waste liquid to be treated, and adjust and control the mol ratio of nitrogen ...

specific Embodiment approach 2

[0027] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the activated sludge in step 1 comes from the secondary settling tank of the municipal sewage plant. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the removal rate of sulfide and nitrate under the autotrophic condition described in step one is 95%, and the removal rate of organic matter and nitric acid is 95% under the heterotrophic condition When the removal rate of salt is 95%, acclimatization is completed. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a method for synchronously removing carbon, nitrogen and sulfur in wastewater, and aims at solving the problems that the prior art is complicated in process, requires tremendous project investment and can not be widely used in the field of sulfur-containing and nitrogen-containing organic wastewater treatment. The method comprises the following steps: (I) acclimating the sludge rich in facultative denitrification desulfurization microorganisms; (II) introducing the waste liquid to be treated and finishing synchronous removal of carbon, nitrogen and sulfur. The method provided by the invention is widely applicable and simple in process, avoids secondary pollution, saves the floor area and requires low operation cost, and is used for synchronously removing carbon, nitrogen and sulfur in wastewater.

Description

technical field [0001] The invention relates to a method for synchronously removing carbon, nitrogen and sulfur in waste water, belonging to the field of waste water treatment. Background technique [0002] The development of petroleum, chemical, pharmaceutical and other industries produces a large amount of organic wastewater containing sulfur and nitrogen. This type of wastewater not only contains a large amount of organic matter, but also contains high concentrations of sulfur and nitrogen pollutants. After being discharged into the water body, it not only produces H 2 S or S 2- , Consume a large amount of dissolved oxygen, cause black odor, and also cause abnormal proliferation of algae and other organisms, release toxic and harmful substances, which are extremely harmful to the environment. Seeking the economical and effective treatment technology of this kind of wastewater has always been a hot spot in the field of environmental engineering in recent years. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C02F3/28
Inventor 刘春爽国亚东赵东风赵朝成
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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