Method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring

A biological treatment and waste water technology, applied in biological water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of high system energy consumption, high operating cost, and difficulty in meeting water quality discharge standards And other issues

Active Publication Date: 2010-05-19
GUANGDONG INST OF MICROORGANISM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned treatment methods either need to add a large amount of chemical agents during the treatment process, and the sludge output is large, or the energy consumption of the system is high, resulting in high operating costs, low removal rates of ammonia nitrogen and color, and accompanied by aeration to blow off hydrogen sulfide odor pollution
The primary inhibitory effect on the anaerobic digestion reaction due to competition between sulfate-reducing bacteria (SRB) and methanogens (MPB) for common substrates (acetic acid and hydrogen), an

Method used

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  • Method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring
  • Method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring

Examples

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Embodiment 1

[0022] according to figure 1 The process shown treats tannery wastewater. By inoculating Citrobacter sp SR3 of the genus Citrobacter in the sludge of an upflow anaerobic bioreactor (UASB), the sludge is routinely domesticated to form activated granular sludge, so that the upflow anaerobic organisms The reactor (UASB) is quickly started; the sludge of the first-stage anaerobic baffle reactor (ABR) is inoculated with Shewanella decolorationis, and the sludge is routinely domesticated to form activated granular sludge , so that the first-stage anaerobic baffle reactor (ABR) can be quickly started; the sludge of the second-stage anaerobic baffle reactor (ABR) was inoculated with Brocadia anammoxidans, and the sludge was Conventional domestication, the formation of activated granular sludge, the rapid start-up of the secondary anaerobic baffle reactor (ABR).

[0023] The concentration of sulfate in the tannery industrial waste water treated in this embodiment is 300 mg / L, the con...

Embodiment 2

[0028] according to figure 1The process shown treats tannery wastewater. By inoculating Desulfovibrio desulfuricans of the genus Desulfovibrio in the sludge of an upflow anaerobic bioreactor (UASB), the sludge is routinely acclimated to form activated granular sludge to make the upflow anaerobic biological reaction Rapid start-up of the reactor (UASB); inoculation of Aeromonas hydrophila (Aeromonas hydrophila) in the sludge of the primary anaerobic baffle reactor (ABR) for routine domestication of the sludge to form activated granular sludge , so that the first-stage anaerobic baffle reactor (ABR) can be quickly started; the sludge in the second-stage anaerobic baffle reactor (ABR) was inoculated with Kuenenia stuttgartiensis, and the sludge was routinely The domestication of activated granular sludge is formed, so that the secondary anaerobic baffle reactor (ABR) can be quickly started.

[0029] The sulfate concentration of the tannery industrial wastewater treated in this ...

Embodiment 3

[0034] according to figure 1 The process shown treats tannery wastewater. By inoculating the sludge of the upflow anaerobic bioreactor (UASB) with Citrobacter sp SR3 of the genus Citrobacter, the sludge is routinely acclimated to form activated granular sludge and make the upflow anaerobic biological reaction The rapid start-up of the UASB reactor; inoculation of Shewanella decolorationis in the sludge of the first-stage anaerobic baffle reactor (ABR) for routine domestication of the sludge to form activated granular sludge, so that The primary anaerobic baffled reactor (ABR) was quickly started; the sludge in the secondary anaerobic baffled reactor (ABR) was inoculated with Brachymonas denitrificans of the genus Brachymonas, and the sludge was routinely The domestication of activated granular sludge is formed, so that the secondary anaerobic baffle reactor (ABR) can be quickly started.

[0035] The tannery industrial wastewater treated in this embodiment has a sulfate conce...

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Abstract

The invention discloses a method for biologically treating wastewater by simultaneously desulfurizing, denitrifying and decoloring, and aims to provide the novel biological anaerobic method for biologically treating the wastewater by simultaneously desulfurizing, denitrifying and decoloring, which has the advantages of low energy consumption, high treatment efficiency, low operating cost, less residual sludge and no secondary pollution. The method comprises the following steps that: the wastewater firstly enters an up-flow anaerobic biological reactor (UASB) and is treated by the up-flow anaerobic biological reactor (UASB); sulfide in effluent is recovered; the effluent enters a primary anaerobic baffled reactor (ABR) and is treated; the effluent is subjected to microaeration to make a molar ratio of nitrate nitrogen to ammoniacal nitrogen in the effluent be (1-1.3):1; and the treated effluent enters a secondary anaerobic baffling plate reactor (ABR), is treated to reach the standard and then is discharged. The method can be used for industrially treating high-concentration sulfate, ammonia nitrogen, stubborn organic pollutants and industrial wastewater with high chromaticity.

Description

Technical field: [0001] The invention relates to a biological treatment method for wastewater, in particular to a biological treatment method for wastewater that simultaneously desulfurizes, denitrogenates and decolorizes. Background technique: [0002] In my country, various industrial wastewaters typically represented by tannery wastewater contain high concentrations of sulfate, ammonia nitrogen, and recalcitrant organic pollutants, with high chroma. At present, the methods used for tannery wastewater treatment mainly include: coagulation precipitation method, adsorption method, advanced oxidation technology, direct recycling method, air flotation method, acid absorption method, catalytic oxidation method, and biochemical method. The above treatment methods either need to add a large amount of chemicals in the treatment process, and the sludge output is large, or the system energy consumption is high, resulting in high operating costs, low removal rates of ammonia nitrogen...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/34
Inventor 孙国萍曾国驱许玫英邓代永罗慧东
Owner GUANGDONG INST OF MICROORGANISM
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