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Method for improving ammonium-nitrogen removal rate in discharged water by using zeolite aerated concrete to construct drainage pipe

A technology of aerated concrete and drainage pipes, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve problems such as high operating costs, low ammonia nitrogen rate, and large fluctuations, and achieve reduction COD load, high ammonia removal efficiency, low price effect

Active Publication Date: 2016-08-03
ANHUI MEIZIRAN ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aeration method requires large investment and operating costs, and the conversion rate of biological floating beds and floating islands to ammonia nitrogen is low
In addition, there is still a lack of effective measures for the treatment of ammonia nitrogen in rainwater and surface runoff. The reason is that the rainwater flow is large and fluctuates greatly. The government is financially unable to afford

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Select natural clinoptilolite ore, crush it through a 0.1mm sieve to obtain natural zeolite powder, use cement as binder, use aluminum powder, lime and surfactant as foaming agent, and the mass ratio of natural zeolite powder, cement, and foaming agent The mass ratio of aluminum powder, lime and surfactant constituting the blowing agent is 100:15:3, and the mass ratio is 1:80:5.

[0021] The above raw materials are batched, mixed, cast, foamed, and cured to form a drainage pipe made of zeolite aerated concrete with an inner diameter of 400mm and an outer diameter of 500mm.

[0022] Install the drainage pipe made of zeolite aerated concrete on the pipeline before the domestic sewage enters the structure. The length of the zeolite aerated concrete pipeline is 500m.

[0023] The test results show that the removal rate of ammonia nitrogen reaches more than 60% after the wastewater flows through the zeolite aerated concrete pipeline.

Embodiment 2

[0025] Select natural clinoptilolite ore, crush it through a 0.1mm sieve to obtain natural zeolite powder, use cement as binder, use aluminum powder, lime, and surfactant as foaming agent, and the mass ratio of natural zeolite powder, cement, and foaming agent The mass ratio of aluminum powder, lime and surfactant constituting the blowing agent is 100:15:3, and the mass ratio is 1:80:5.

[0026] The above raw materials are batched and mixed, and a layer of zeolite aerated concrete inner layer with a thickness of 50mm is cast inside the ordinary concrete drainage pipe;

[0027] Install the drainage pipe with 50mm zeolite aerated concrete inner layer on the rainwater pipeline, and the length of the drainage pipe with zeolite aerated concrete inner layer is 500m;

[0028] The test results show that the removal rate of ammonia nitrogen after the rainwater flows through the zeolite aerated concrete pipeline reaches more than 85%.

Embodiment 3

[0030] Select natural clinoptilolite ore, crush it through a 0.1mm sieve to obtain natural zeolite powder, use cement as binder, use aluminum powder, lime and surfactant as foaming agent, and the mass ratio of natural zeolite powder, cement, and foaming agent The mass ratio of aluminum powder, lime and surfactant constituting the blowing agent is 100:15:3, and the mass ratio is 1:80:5.

[0031] After the above materials are mixed, poured into shape, and initially set for 1 to 2 hours, they are cut into blocks (600mm in length, 300mm in width, and 180mm in thickness) with a wire cutter from three directions: length, width, and thickness, and then placed in autoclaved curing. The zeolite aerated concrete block was obtained by steam curing for 15 hours at a pressure of 12Mpa and a temperature of 180°C in the kettle;

[0032] Use zeolite aerated concrete blocks to construct drainage pipes and culverts. The cross-sectional area of ​​pipes and culverts is designed according to the d...

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Abstract

The invention discloses a method for improving the ammonium-nitrogen removal rate in discharged water by using zeolite aerated concrete to construct a drainage pipe .The method is characterized in that natural zeolite powder is used as a main raw material, a cement bonding agent and a foaming agent are added, the drainage pipe is prepared through burdening, mixing, foaming and maintenance, or a zeolite aerated concrete inner layer is formed inside an existing concrete drainage pipe, or zeolite aerated concrete building blocks and boards are formed and constructed into a drainage pipe culvert; the drainage pipe or the drainage pipe culvert is used for delivering domestic sewage and domestic sewage or rainwater subjected to secondary treatment, and ammonium and nitrogen in the water are eliminated under the preferential adsorption effect of zeolite and the aerobiotic amine oxidation effect of microorganisms .The method utilizes the water amount change of the drainage pipe to spontaneously alternate preferential ammonium-nitrogen adsorption of the zeolite and the aerobiotic amine oxidation and regeneration of supported microorganisms, consumes no power, does not need manual operation and maintenance and can play the effect of removing ammonium and nitrogen in the water once the drainage pipe is built and comes into service.

Description

1. Technical field [0001] The present invention relates to drainage engineering and pollution control. 2. Background technology [0002] With the development of urbanization and the aggravation of water pollution, eutrophication has generally occurred in surface water bodies in my country. Most of the urban rivers and landscape water bodies are in the fifth category, and the most common pollutant that exceeds the standard is ammonia nitrogen. This requires strengthening the treatment of ammonia and nitrogen removal in domestic sewage and ground rainwater. At present, the treatment of ammonia nitrogen removal from domestic sewage often increases the nitrification of ammonia nitrogen in water through intermittent activated sludge process, delayed aeration, biological aerated filter, etc. The treatment of ammonia nitrogen in river water mainly accelerates ammonia nitrification through river bed aeration, or through ecological restoration Ways, such as biological floating beds...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16
CPCC02F1/281C02F1/42C02F9/00C02F2101/16C02F2103/001C02F2303/16C02F2307/08
Inventor 周其胤陈天虎陈斌
Owner ANHUI MEIZIRAN ENVIRONMENTAL TECH
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