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Method for resourcezation treatment on urea wastewater

A technology of recycling waste water, applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve problems such as water body deterioration, polluted waters, aquatic animal death, etc., to improve soil conditions, increase soil Fertility, the effect of extending the shelf life

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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  • Method for resourcezation treatment on urea wastewater
  • Method for resourcezation treatment on urea wastewater

Examples

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Embodiment 1

[0028] A method for recycling urine waste water, comprising the following steps:

[0029] 1) Screening corn stalks as the preparation material of biochar;

[0030] 2) Processing the screened biomass material;

[0031] a) After cleaning the corn stalks with ultrapure water, place them in an oven to dry;

[0032] b) pulverize the dried biomass material with a pulverizer, and pass through a 20-mesh screen;

[0033] c) the crushed powder is packed into a 20mL crucible;

[0034] d) Place the crucible in the muffle furnace and set the relevant parameters;

[0035] Among them, the heating rate is 5°C / min, the firing temperature is 350°C, and the constant temperature time is 1 hour;

[0036] 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;

[0037] f) placing the cleaned biochar in an oven and drying at 50°C;

[0038] 3) adding biochar and calcium peroxide, wherein the concent...

Embodiment 2

[0040] A method for recycling urine waste water, comprising the following steps:

[0041] 1) Screening corn stalks as the preparation material of biochar;

[0042] 2) Processing the screened biomass material;

[0043] a) After cleaning the corn stalks with ultrapure water, place them in an oven to dry;

[0044] b) pulverize the dried biomass material with a pulverizer, and pass through a 20-mesh screen;

[0045] c) the crushed powder is packed into a 20mL crucible;

[0046] d) Place the crucible in the muffle furnace and set the relevant parameters;

[0047] Wherein, the heating rate is 10°C / min, the firing temperature is 500°C, and the constant temperature time is 2 hours;

[0048] 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;

[0049] f) placing the cleaned biochar in an oven and drying at 80°C;

[0050] 3) adding biochar and calcium peroxide, wherein the concentr...

Embodiment 3

[0052] A method for recycling urine waste water, comprising the following steps:

[0053] 1) Screening corn stalks as the preparation material of biochar;

[0054] 2) Processing the screened biomass material;

[0055] a) After cleaning the corn stalks with ultrapure water, place them in an oven to dry;

[0056] b) pulverize the dried biomass material with a pulverizer, and pass through a 20-mesh screen;

[0057] c) the crushed powder is packed into a 20mL crucible;

[0058] d) Place the crucible in the muffle furnace and set the relevant parameters;

[0059] Wherein, the heating rate is 10°C / min, the firing temperature is 700°C, and the constant temperature time is 2 hours;

[0060] 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;

[0061] f) placing the cleaned biochar in an oven and drying at 80°C;

[0062] 3) adding biochar and calcium peroxide, wherein the concentrat...

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Abstract

The invention relates to a method for resourcezation treatment on urea wastewater. The method comprises the following steps: selecting a charcoal preparation material, treating the preparation material, preparing charcoal, and combining the charcoal with calcium peroxide e. By adopting the method, resourcezation treatment on urea wastewater is implemented, on one hand, the charcoal self has a goodadsorption capability and is capable of effectively adsorbing pollutant substances in wastewater, such as sulfonamides, the pollutant substances can be removed by means of filtration and the like, and the treated urea wastewater can be used as a liquid fertilizer; on the other hand, due to addition of the calcium peroxide, a phosphorus resource in the urea wastewater can be effectively recycled,calcium ions can be reacted with phosphorus in the urea wastewater to generate calcium phosphate (Ca3(PO4)2), in addition, the charcoal is mostly prepared from waste biomass, and the preparation and utilization process self belongs to resource circulation and utilization, so that the technique has very good effects on both urea wastewater treatment and resource recycling and utilization.

Description

technical field [0001] The invention relates to phosphorus resources and pollutants in urine waste water, in particular to a method for resourceful disposal of urine waste water. 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 for phosphorus is expected to further increase, and the peak of global p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/58B01J20/20B01J20/30C01B25/32C05B7/00
CPCB01J20/20B01J20/3078B01J2220/4825B01J2220/4881C01B25/32C02F1/283C02F1/58C02F2101/105C05B7/00
Inventor 李志鹏孙佩哲张若纯
Owner TIANJIN UNIV
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