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Mixed nutritional denitrification method based on sulfur reduction and sulfur autotrophic denitrification

A technology of mixed nutrition and sulfur autotrophy, applied in chemical instruments and methods, water treatment of special compounds, water pollutants, etc., can solve the problems of ignoring the whole system and synergistic effect of a single one, so as to improve the denitrification effect and avoid new Effects of pollution and loss reduction

Active Publication Date: 2021-11-30
CHINA THREE GORGES CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] The technical problem to be solved by the present invention is to provide a mixed-trophic denitrification method based on sulfur reduction and sulfur autotrophic denitrification, fully utilizing the total dissolved sulfide (TDS) generated by sulfate in the raw wastewater under the action of SRB as denitrification Substrate, instead of the prior art using sulfur powder, sulfur, or the carrier; also solves its existing defects to solve the problem of a single synergistic effect in the existing research, ignoring the overall effect of the system, make full use of the raw wastewater Different carbon sources and traditional heterotrophic denitrification, orderly construct different functional units, forming a mixed-trophic denitrification with synergistic effects of autotrophic and heterotrophic denitrification

Method used

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  • Mixed nutritional denitrification method based on sulfur reduction and sulfur autotrophic denitrification
  • Mixed nutritional denitrification method based on sulfur reduction and sulfur autotrophic denitrification
  • Mixed nutritional denitrification method based on sulfur reduction and sulfur autotrophic denitrification

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Embodiment 1

[0053] Such as figure 1 As shown, a mixed-trophic denitrification method based on sulfur reduction and sulfur autotrophic denitrification, the method includes the following steps:

[0054] Step 1: dividing the raw wastewater containing sulfate into part A and part B, wherein part A accounts for 30-40% of the total raw wastewater quality;

[0055] Step 2: Input the raw wastewater of part A into the sulfate reduction reactor (SRB pool) 2, and the raw wastewater of part A undergoes sulfate reduction reaction under the action of SRB bacteria, and SO 4 2- is reduced to S 2 o 3 2- , S 2- and total soluble sulfides such as S, lesser part is reduced to H 2 S is removed;

[0056] To facilitate solving SO 4 2- Under the action of SRB, it is reduced to TDS to exert the greatest effect. The structural design of the SRB pool 2 sampling anaerobic reaction in this embodiment, the pool body is closed and air is relatively isolated, and the anaerobic sludge is cultivated in the pool....

Embodiment 2

[0071] Except that the technical scheme of "inputting part A of the raw wastewater into the sulfate reduction reactor (SRB pool) 2 through the anaerobic tank (ANA) 1" in step 2 is different from the first embodiment, other technical solutions are the same as the first embodiment.

Embodiment 3

[0072] Embodiment three (the present invention's method handles the comprehensive wastewater application embodiment of a park, based on embodiment two)

[0073] This implementation plan uses the raw water of a sewage treatment plant in an industrial park that is actually in operation as the test object, and constructs a set of 30 tons / day pilot plant for implementation.

[0074] Raw water quality: the average concentration of COD is 333mg / L, the average concentration of BOD is 116.5mg / L, the average B / C ratio is 0.35, the average concentration of total nitrogen is 46.3mg / L, the average BOD / TN of raw wastewater is 2.5, of which SO 4 2- The average concentration is 372.3mg / L, which belongs to typical low-carbon sulfur-containing wastewater, and BOD / TN cannot meet the requirements of heterotrophic denitrification.

[0075] The influent water of the pilot test device is taken from the grit chamber of a sewage treatment plant in an industrial park, and after removing large suspend...

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Abstract

The invention relates to a mixed nutritional denitrification method based on sulfur reduction and sulfur autotrophic denitrification. The method comprises the following steps of: 1, dividing raw wastewater containing sulfate into a part A and a part B; 2, inputting the part A of raw wastewater into a sulfate reduction reactor; 3, inputting the part B of raw wastewater and effluent supernatant of the sulfate reduction reactor into an anoxic tank, and communicating a water outlet of the anoxic tank with an aerobic tank through a sulfur autotrophic tank, so as to enable nitrification liquid to flow back to the anoxic tank from the tail of the aerobic tank; and 4, communicating a water outlet of the aerobic tank with a sedimentation tank, and carrying out mud-water separation on the wastewater treated by the aerobic tank through the sedimentation tank. According to the method provided by the invention, the total dissolved sulfide generated by sulfate in the raw wastewater under the action of SRB is fully utilized as a denitrification matrix; and the problem that the synergistic effect is singly exerted and the overall effect of the system is neglected in the existing research is solved.

Description

technical field [0001] The invention relates to the field of sewage and wastewater treatment, especially a mixed-trophic denitrification based on sulfur reduction and sulfur autotrophic denitrification, which is suitable for the denitrification treatment of sulfate-containing wastewater (such as industrial wastewater, industrial park wastewater, comprehensive wastewater, etc.). nitrogen method. Background technique [0002] The principle of traditional denitrification denitrification is that under anaerobic or anoxic conditions, nitrate is reduced to N as an electron acceptor under the action of heterotrophic denitrifying bacteria. 2 O or N 2 Nitrogen can be effectively removed from wastewater. Denitrifying bacteria mainly belong to facultative anaerobic bacteria, which obtain energy and metabolism through organic carbon as electron donor and nitrate as electron acceptor. In the process of denitrification, there needs to be enough organic carbon sources as electron accept...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F3/34C02F101/10
CPCC02F3/305C02F3/345C02F2101/101C02F2305/06Y02W10/10
Inventor 陈亚松王殿常李翀聂中林
Owner CHINA THREE GORGES CORPORATION
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