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Treatment method of organic wastewater containing salts and phosphorus

A technology of organic wastewater and treatment methods, applied in the field of resources and environment, can solve the problems of high cost, solid hazardous waste, etc., and achieve the effect of low cost, significant economic and environmental benefits

Inactive Publication Date: 2019-11-05
TIANJIN UNIVERSITY OF TECHNOLOGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lime neutralization is also a common treatment method for organic wastewater containing salt and phosphorus, but this method will generate solid hazardous waste, and the generated wastewater needs to be further treated in a sewage treatment plant, which is costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Get 1000kg of salt-containing and phosphorus-containing organic waste water. After testing, the contents of each component are: 3wt.% of phosphate, 5wt.% of sodium chloride, 2wt.% of dimethylamine, 2wt.% of other organic matter, and the balance is water Add 60kg of calcium oxide to salt-containing phosphorus-containing organic wastewater, control the pH of the solution to be 11, and the temperature is 88°C to reclaim 15kg of dimethylamine; filter the remaining solid-liquid mixture to obtain 180kg of crude calcium phosphate (water quality), and the remaining salt-containing The mother liquor is sodium chloride and other organic components;

[0044](2) Evaporate and crystallize the salt-containing mother liquor through the MVR evaporator to obtain 80kg of sodium chloride solid containing organic matter (containing water and organic matter), wherein the evaporation crystallization temperature is 100°C, and the sodium chloride obtained by evaporation and crystallization ...

Embodiment 2

[0048] (1) Get 1000kg of salt-containing and phosphorus-containing organic waste water. After testing, the contents of each component are: phosphite 4wt.%, sodium chloride 7wt.%, triethylamine 2.5wt.%, other organic matter 3wt.%; add oxidation Calcium 90kg, the pH of the control solution is 11.3, the temperature is 102°C, and 20kg of triethylamine is reclaimed; the remaining solid-liquid mixture is filtered to obtain 250kg of calcium phosphate and calcium phosphite solids (water content), and the remaining saline mother liquor is sodium chloride and other organic Element;

[0049] (2) Evaporate and crystallize the salt-containing mother liquor through the MVR evaporator to obtain 140 kg of sodium chloride solid containing organic matter (containing water and organic matter), wherein the evaporation crystallization temperature is 90 ° C, and the sodium chloride obtained by evaporation and crystallization is sent to a high-temperature oxidation device , after 750°C and 50 minute...

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Abstract

The invention provides a treatment method of organic wastewater containing salts and phosphorus and belongs to the technical field of environmental resources. Organic amine gas, calcium salt solids and a salt-containing mother liquor are obtained through the reaction between calcium-containing alkaline substances and the organic wastewater containing salts and phosphorus; evaporation crystallization and high-temperature oxidation are carried out on the salt-containing mother liquor to obtain industrial sodium chloride; calcium phosphate is obtained through high-temperature oxidation of the calcium salt solids. The provided treatment method can carry out recycling treatment on all components in the wastewater, and obtained calcium phosphate can be sold as a fertilizer product. The providedtreatment method is low in cost, does not generate new hazardous wastes and has remarkable economic and environmental benefits.

Description

technical field [0001] The invention relates to a treatment method for organic wastewater containing salt and phosphorus, and belongs to the technical field of resources and environment. Background technique [0002] With the rapid development of industry, China is now the world's largest producer of paints, dyes, antibiotics and the second largest producer of pesticides. However, the production process of these industries often discharges a large amount of toxic or refractory substances. These substances have the characteristics of poor biodegradability, complex composition, high salt content, and serious harm to the natural environment and human health. problems in the field. [0003] Salt and phosphorus-containing organic wastewater is a particularly typical representative of this type of wastewater. Wastewater generally contains hydrochloric acid, sodium chloride, organic amines, phosphoric acid or phosphorous acid and other components. Conventional treatment methods f...

Claims

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Application Information

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IPC IPC(8): C02F9/10C01D3/06C01B25/32C02F101/10C02F101/12C02F101/20C02F101/38
CPCC01B25/325C01D3/06C02F1/00C02F1/001C02F1/02C02F1/04C02F1/72C02F9/00C02F2101/105C02F2101/12C02F2101/20C02F2101/38
Inventor 李梅彤袁文蛟张柯范文浩徐元
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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