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Denitrification pretreatment system and method for high-nitrate industrial wastewater and application thereof

A technology for industrial waste water and nitrate, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, filtration treatment, etc., and can solve problems such as low efficiency and increased treatment costs

Active Publication Date: 2020-04-07
ANHUI UNIVERSITY OF ARCHITECTURE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-nitrate industrial wastewater denitrification pretreatment system, method and application thereof in order to solve the above problems, and to solve the problem of increased treatment cost and low efficiency when traditionally adding organic carbon sources for pretreatment technical issues

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  • Denitrification pretreatment system and method for high-nitrate industrial wastewater and application thereof
  • Denitrification pretreatment system and method for high-nitrate industrial wastewater and application thereof
  • Denitrification pretreatment system and method for high-nitrate industrial wastewater and application thereof

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Embodiment 1

[0050] A high nitrate industrial wastewater denitrification pretreatment system, such as Figure 1-2 As shown, it includes a bracket 1 and several cylinders 2 arranged on the bracket 1 , and the cylinders 2 are vertically connected to the bracket 1 through clamps 3 . It should be pointed out that the number of cylinders 2 in the pretreatment system of the present invention is one or more, all of which should be included in the protection scope of the present invention.

[0051] The cylinder body 2 is provided with a filter plate 4 with an average pore size of 10 mm. The function of the filter plate 4 is to evenly distribute water and then be treated by the biological filter material described below.

[0052] The bottom end of the cylinder body 2 is provided with a sewage water inlet 21, and the upper end of the cylinder body 2 is provided with a sewage water outlet 22, and the sewage water inlet 21 is connected with the sewage to be treated through a sewage water inlet pipe, a...

Embodiment 2

[0065] This embodiment provides a method for pretreating high nitrate industrial wastewater by using the pretreatment system of the above embodiment 1, including:

[0066] Step 1: Membrane hanging and start-up of biofilter:

[0067] Take nitrate-containing wastewater as influent water, take sewage plant return sludge as inoculation sludge, mix nitrate-containing wastewater and inoculation sludge, input through the sewage water inlet 21 of the pretreatment system, carry out film formation, and run continuously until A layer of light brown biofilm is formed on the surface of the biological filter material, indicating that the film is successfully attached;

[0068] Step 2: Pretreatment of high nitrate industrial wastewater

[0069] High nitrate industrial wastewater to be treated passes through the biofilter, in this embodiment, the volume is 1m 3 , the height of the filter material is 1m, the ascending flow rate is 15m / h, the biological filter material is in a slightly expand...

Embodiment 3

[0073] This embodiment provides another method for pretreating high-nitrate industrial wastewater by using the pretreatment system of the above-mentioned embodiment 1, including:

[0074] Step 1: Membrane hanging and start-up of biofilter:

[0075] Take nitrate-containing wastewater as influent water, take sewage plant return sludge as inoculation sludge, mix nitrate-containing wastewater and inoculation sludge, input through the sewage water inlet 21 of the pretreatment system, carry out film formation, and run continuously until A layer of light brown biofilm is formed on the surface of the biological filter material, indicating that the film is successfully attached;

[0076] Step 2: Pretreatment of high nitrate industrial wastewater

[0077] The high nitrate industrial wastewater to be treated passes through the biological filter, the height of the filter material is 35cm, the ascending flow rate is 15m / h, the biological filter material is in a slightly expanded state, an...

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Abstract

The invention relates to a denitrification pretreatment system and method for high-nitrate industrial wastewater and an application thereof, and belongs to the technical field of sewage treatment. Anautotrophic denitrification filter tank is used as a pretreatment system of the wastewater. A high-activity biological filter material prepared from sulfur-containing tailings is utilized, an organiccarbon source is not required to be added, sulfide is used as an electron donor, and thiobacillus denitrificans is used for autotrophic denitrification. A biological filter is selected as a pretreatment system in sewage pretreatment, which is not reported at present. The concentration of nitrate nitrogen in the high-nitrate industrial wastewater can be greatly reduced through autotrophic denitrification of thiobacillus denitrificans in the biological filter, the concentration of total nitrogen (TN) is reduced to below 45mg / L to meet the water quality standard requirement of sewage discharged into urban sewers, and the treated wastewater is treated by a subsequent sewage treatment plant to realize up-to-standard discharge of effluent total nitrogen.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a high-nitrate industrial wastewater denitrification pretreatment system, method and application thereof. Background technique [0002] With the rapid development of urban construction and industry, the amount of sewage is increasing day by day. At present, my country's urban sewage is generally imported into municipal or industrial park drainage facilities. Due to the complex composition of industrial wastewater and large fluctuations in water quality and quantity, high-load influent has a greater impact on the biochemical system of sewage treatment plants, which can lead to microbial inactivation, short-term paralysis of process operation, and directly affect sewage treatment efficiency. [0003] The process of sewage treatment plant supporting municipal or industrial park drainage system is mainly aimed at pollutants such as COD and BOD 5 , total nitroge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/001C02F3/28C02F2101/163
Inventor 黄显怀刘俊向凤伍昌年凌琪陶森森陈嘉雄丁伟
Owner ANHUI UNIVERSITY OF ARCHITECTURE
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