Combined treatment method for recovery of nitrogen and phosphorus elements in urine wastewater based on biological carbon

A treatment method, biochar technology, applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as water body deterioration, aquatic animal death, polluted waters, etc., to improve soil pH, prolonging the effective use period, and realizing the effect of nitrogen and phosphorus resource recovery

Inactive Publication Date: 2019-01-08
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the total volume of urine only accounts for about 4% of the total amount of urban sewage, it provides nearly 80% of the nitrogen and more than 50% of the phosphorus in urban sewage. Since urban sewage will be discharged into natural water bodies after treatment, Even some sewage and wastewater will be discharged directly without treatment, so the high concentration of nitrogen and phosphorus in sewage and wastewater will have a great impact on the water body. The most direct impact is the eutrophication of the water body, leading to the deterioration of the water body and the death of aquatic animals. polluted waters

Method used

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  • Combined treatment method for recovery of nitrogen and phosphorus elements in urine wastewater based on biological carbon
  • Combined treatment method for recovery of nitrogen and phosphorus elements in urine wastewater based on biological carbon

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Effect test

Embodiment 1

[0030] The joint treatment method of nitrogen and phosphorus element recovery in the urine waste water based on biochar comprises the following steps:

[0031] 1) Screening corn stalks as the preparation material of biochar;

[0032] 2) Processing the screened biomass material;

[0033] a) After cleaning the corn stalks with ultrapure water, place them in an oven to dry;

[0034] b) pulverize the dried biomass material with a pulverizer, and pass through a 20-mesh screen;

[0035] c) the crushed powder is packed into a 20mL crucible;

[0036] d) Place the crucible in the muffle furnace and set the relevant parameters;

[0037] Among them, the heating rate is 5°C / min, the firing temperature is 350°C, and the constant temperature time is 1 hour;

[0038] e) Clean the fired biochar with ultrapure water until the absorbance of the cleaning solution is less than 0.005 when measured at a wavelength of 254nm;

[0039] f) placing the cleaned biochar in an oven and drying at 50°C;...

Embodiment 2

[0042] The joint treatment method of nitrogen and phosphorus element recovery in the urine waste water based on biochar comprises the following steps:

[0043] 1) Screening corn stalks as the preparation material of biochar;

[0044] 2) Processing the screened biomass material;

[0045] a) After cleaning the corn stalks with ultrapure water, place them in an oven to dry;

[0046] b) pulverize the dried biomass material with a pulverizer, and pass through a 20-mesh screen;

[0047] c) the crushed powder is packed into a 20mL crucible;

[0048] d) Place the crucible in the muffle furnace and set the relevant parameters;

[0049]Wherein, the heating rate is 10°C / min, the firing temperature is 500°C, and the constant temperature time is 2 hours;

[0050] e) Clean the fired biochar with ultrapure water until the absorbance of the cleaning solution is less than 0.005 when measured at a wavelength of 254nm;

[0051] f) placing the cleaned biochar in an oven and drying at 80°C; ...

Embodiment 3

[0054] The joint treatment method of nitrogen and phosphorus element recovery in the urine waste water based on biochar comprises the following steps:

[0055] 1) Screening corn stalks as the preparation material of biochar;

[0056] 2) Processing the screened biomass material;

[0057] a) After cleaning the corn stalks with ultrapure water, place them in an oven to dry;

[0058] b) pulverize the dried biomass material with a pulverizer, and pass through a 20-mesh screen;

[0059] c) the crushed powder is packed into a 20mL crucible;

[0060] d) Place the crucible in the muffle furnace and set the relevant parameters;

[0061] Wherein, the heating rate is 10°C / min, the firing temperature is 700°C, and the constant temperature time is 2 hours;

[0062] e) Clean the fired biochar with ultrapure water until the absorbance of the cleaning solution is less than 0.005 when measured at a wavelength of 254nm;

[0063] f) placing the cleaned biochar in an oven and drying at 80°C; ...

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Abstract

The invention relates to a combined treatment method for recovery of nitrogen and phosphorus elements in urine wastewater based on biological carbon. The method mainly comprises the steps of selectionof biological carbon preparation materials, treatment of the preparation materials, preparation of the biological carbon and combined use of the biological carbon and magnesium peroxide. When the method is used for treating the urine wastewater, on the one hand, the biological carbon has relatively good absorbability, and can effectively absorb pollutants contained in the wastewater, such as sulfonamides and the like after the biological carbon is added into the urine wastewater; on the other hand, the addition of magnesium peroxide provides a feasible approach for the recovery of nitrogen and phosphorus resources in the urine wastewater; magnesium ions can react with ammonia nitrogen and phosphorus in the urine wastewater to generate magnesium phosphate (Mg3(PO4)2) and struvite (MgNH4PO4.6H2O); in addition, the biological carbon is a material prepared from waste biomass, which belongs to the scope of resource recycling; and therefore, the method exerts an excellent effect in the urine wastewater treatment and resource recycling.

Description

technical field [0001] The invention relates to nitrogen and phosphorus resources and pollutants in urine wastewater, in particular to a combined treatment method for recovering nitrogen and phosphorus elements in urine wastewater based on biochar. Background technique [0002] In contemporary society, with the continuous progress of the economy, the continuous progress of industrial and agricultural production, various environmental problems arise spontaneously, especially with the continuous growth of the population, the demand for food is increasing, and the greater demand for food Promote the gradual increase in the use of chemical fertilizers in agricultural production. Phosphorus fertilizers mainly come from the mining and smelting of phosphorus minerals. Most of the used phosphorus resources will go through the element cycle and finally be stored in the seabed in the form of sediments. Phosphorus resources become a non-renewable resource. At this stage, the demand fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58B01J20/20B01J20/30C01B25/34C01B25/45C05B9/00C05B7/00C02F101/16
CPCB01J20/20B01J20/3078B01J2220/4825B01J2220/4881C01B25/34C01B25/451C02F1/283C02F1/58C02F1/586C02F2101/105C02F2101/16C05B7/00C05B9/00
Inventor 李志鹏孙佩哲张若纯
Owner TIANJIN UNIV
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