Sewage treatment method for simultaneously producing nitrogen and removing nitrogen by biological hydrogen production, coupling and denitrification

A sewage treatment method and biological hydrogen production technology, applied in the direction of biological water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve problems such as insufficient carbon source, reduce the operating cost of denitrification and denitrification process, etc. , to achieve the effect of reducing infrastructure costs, reducing consumption, and improving hydrogen production performance

Active Publication Date: 2018-12-25
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned prior art, the present invention provides a sewage treatment method that realizes simultaneous hydrogen production and denitrification by coupling denitrification with biological hydrogen production. This method can effectively solve the problem of insufficient carbon source in the denitrification process, and can simultaneously improve Improve the hydrogen production performance in the hydrogen production process, and reduce the alkalinity dosage in the dark fermentation biological hydrogen production process, which can greatly reduce the operating cost of the denitrification and denitrification process

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  • Sewage treatment method for simultaneously producing nitrogen and removing nitrogen by biological hydrogen production, coupling and denitrification
  • Sewage treatment method for simultaneously producing nitrogen and removing nitrogen by biological hydrogen production, coupling and denitrification
  • Sewage treatment method for simultaneously producing nitrogen and removing nitrogen by biological hydrogen production, coupling and denitrification

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Embodiment 1

[0044] A sewage treatment method for simultaneous hydrogen production and denitrification by coupling denitrification with biological hydrogen production, the specific steps are as follows:

[0045] (1) Sludge inoculation: Take the sludge from the secondary sedimentation tank of a municipal sewage treatment plant, use a sieve with a pore size of 0.5 mm to remove the larger impurities, then aerate for 40 hours, and then take 4 L of it to inoculate in In the biochemical reaction zone in the AICHP reactor, the MLSS of the AICHP reactor as a whole is 18.51g / L, and the MLVSS is 11.40g / L;

[0046] (2) Start-up of water intake: pump the organic sewage into the reactor with a peristaltic pump. The COD of the influent organic sewage is 8800mg / L, the pH of the influent is 7.8-8.0, and the NO 3 - -N concentration is 73.3mg / L, influent COD / NO 3 - -N value is 120; In addition, before organic sewage enters water, add trace element solution to organic sewage according to the ratio of V (o...

Embodiment 2

[0050] A sewage treatment method for simultaneous hydrogen production and denitrification by coupling denitrification with biological hydrogen production, the specific steps are as follows:

[0051] (1) Sludge inoculation: take river bottom sludge, use a screen with a pore size of 1mm to remove larger impurities, then aerate for 48 hours, and then take 4L of it and inoculate it in the biochemical reaction area of ​​the AICHP reactor In the interior, the MLSS of the AICHP reactor as a whole is 15.20g / L, and the MLVSS is 13.45g / L;

[0052] (2) Start-up of water intake: Use a peristaltic pump to pump the organic sewage into the reactor. The COD of the organic sewage is 4000mg / L, the pH of the influent is 7.8-8.0, and the NO of the influent is 3 - -N concentration is 50mg / L, influent COD / NO 3 - -N value is 80; In addition, before the organic sewage enters water, add the trace element solution to the organic sewage according to the ratio of V (organic sewage): V (trace element s...

Embodiment 3

[0055] A sewage treatment method for simultaneous hydrogen production and denitrification by coupling denitrification with biological hydrogen production, the specific steps are as follows:

[0056] (1) Sludge inoculation: Take the sludge from the secondary settling tank and the anaerobic hydrogen-producing sludge of a municipal sewage treatment plant, and use a sieve with a pore size of 0.5 mm to remove the larger impurities, and mix them at a ratio of 1:1 The mass ratio is uniformly mixed, and then aerated for 45 hours, and then 4L of it is inoculated in the AICHP reactor, so that the overall MLSS of the AICHP reactor is 20g / L, and the MLVSS is 12.45g / L;

[0057] (2) Start-up of water intake: pump the organic sewage into the reactor with a peristaltic pump. The COD of the influent organic sewage is 8800mg / L, the pH of the influent is 7.8-8.0, and the NO 3 - -N concentration is 44mg / L, influent COD / NO 3 - -N value is 200; In addition, before the organic sewage enters water...

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Abstract

The invention discloses a sewage treatment method for simultaneously producing nitrogen and removing nitrogen by biological hydrogen production, coupling and denitrification. The sewage treatment method for simultaneously producing nitrogen and removing nitrogen by biological hydrogen production, coupling and denitrification comprises the steps of sludge inoculation, reactor running and the like.In sludge inoculation, sludge which simultaneously comprises denitrification microorganisms and hydrogen production microorganisms in an anaerobic reactor, and thus, MLSS in the reactor is 15-20 g / L;according to running of the reactor, organic sewage is pumped into the anaerobic reactor, the running temperature of the reactor is controlled to be 25-37 DEG C, running pH of the reactor is controlled to be 4-10, oxidation reduction potential is controlled to be minus 200- minus 500 mV, and hydraulic retention time is controlled to be 4-12 h until sewage treatment is finished. In the method, theproblem that carbon sources are insufficient in a denitrification process is solved, the hydrogen production property in a hydrogen production process of dark fermenting organisms is improved, the dosage of throwing and adding of alkali in the hydrogen production process of the dark fermenting organisms is reduced, and the running cost in a process of nitrogen removal by denitrification can be reduced.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sewage treatment method in which biological hydrogen production coupled with denitrification realizes simultaneous hydrogen production and denitrification. Background technique [0002] Biological hydrogen production by dark fermentation of organic sewage is a process in which the metabolism of microorganisms in hydrogen-producing sludge is used to convert organic matter in sewage into hydrogen under dark and anaerobic conditions, thereby achieving dual effects of sewage purification and energy recovery. Compared with the traditional methanogenic fermentation process, the dark fermentation biohydrogen production process recovers gas as hydrogen, and the product of hydrogen combustion is water, which will not cause greenhouse effect or environmental pollution. The denitrification process usually involves heterotrophic denitrifying microorganisms converting n...

Claims

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Application Information

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IPC IPC(8): C02F9/14C12P3/00C02F101/30
CPCC02F3/28C02F3/2833C02F3/2846C02F3/34C02F9/00C02F2101/30C02F2209/02C02F2209/04C02F2209/06C02F2209/08C02F2209/10C02F2209/15C02F2209/44C12P3/00
Inventor 陈滢刘敏张松
Owner SICHUAN UNIV
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