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Method for wastewater comprehensive utilization of saponin production

A technology for producing wastewater and saponin, applied in chemical instruments and methods, phosphorus compounds, non-metallic elements, etc., can solve the problems of high concentration, unacceptable for enterprises, large wastewater treatment capacity, etc., and achieves low operating cost, wastewater containing The effect of reducing salt content and reducing the difficulty of treatment

Inactive Publication Date: 2008-03-05
倪文斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its disadvantage is that the wastewater treatment volume is large and the concentration is high, and it is difficult to meet the discharge standards. The investment in the entire process equipment is nearly 4 million yuan, which is difficult for enterprises to accept.

Method used

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  • Method for wastewater comprehensive utilization of saponin production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The hydrolyzate of turmeric hydrolyzed by hydrochloric acid is filtered or centrifuged to obtain high-concentration wastewater and filter cake. The water content of the filter cake is 80%. The filter cake is carried out in the same way as the traditional process. After three times of rinsing and filtration, the eluate is combined into low-concentration wastewater with a concentration of COD=5000mg / L. The wastewater is neutralized by alkali to pH6~8, and N and P nutrients are supplemented. Anaerobic reactor (anaerobic filter), the COD removal rate of wastewater reaches 70%. The COD concentration of the effluent is 1500mg / L, and then treated in the aerobic aeration tank, the effluent reaches COD=100mg / L and is discharged.

[0030] Get 50 kilograms of above-mentioned high-concentration waste water, add auxiliary agent (tall oil pine resin) 260g, combine 10 kilograms of low-concentration waste water, and 10 kilograms of fluosilicic acid produced in superphosphate productio...

Embodiment 2

[0032] Filter or centrifuge the hydrolyzate of fendilong hydrolyzed by sulfuric acid to obtain high-concentration wastewater and filter cake. The filter cake has a water content of 72%. The filter cake is carried out in the same way as the traditional process. After rinsing and filtering, the eluate is combined into low-concentration wastewater with a concentration of COD=8000mg / L. The wastewater is neutralized by alkali to PH=7, and N and P nutrients are supplemented. Flow plate anaerobic reactor, the COD removal rate of wastewater reaches 78%. The COD concentration of the effluent reaches 1760mg / L, and after oxidation ditch treatment, the effluent COD reaches 90mg / L and is discharged.

[0033] Take 10 kg of the above-mentioned high-concentration waste water, add 1 g of auxiliary agent (tall oil fatty acid), combine 20 kg of low-concentration waste water, and 20 kg of fluosilicic acid produced in the superphosphate production process, and pour it into the pulping tank and fr...

Embodiment 3

[0035] The hydrolyzate of turmeric hydrolyzed by sulfuric acid is filtered or centrifuged to obtain high-concentration wastewater and filter cake. The water content of the filter cake is 68%. The filter cake is carried out in the same way as the traditional process. After rinsing and filtering, the eluate is combined into low-concentration wastewater with a concentration of COD=8000mg / L. The wastewater is neutralized by alkali to PH=7, and N and P nutrients are supplemented. Oxygen digester, the COD removal rate of wastewater reaches 78%. The effluent COD concentration reaches 1760mg / L, and after SBR treatment, the effluent COD reaches 90mg / L and is discharged.

[0036]Take 70 kg of the above-mentioned high-concentration wastewater, add 60 g of oleic acid as an auxiliary agent, and put it into the slurry mixing tank to carry out preliminary reaction with the pulp returned from the pulp high level tank. Control the water content of the mixed liquid in the slurry tank to 65%, ...

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Abstract

The process of utilizing saponin producing effluent includes the following steps: adding assistant to high concentration effluent and merging partial eluate to obtain mixed acid solution, and grinding together with phosphate ore in a ball mill to obtain slurry; flowing the slurry through one storing tank and one high level tank to one reducing chamber and reacting with concentrated sulfuric acid solution to prepare calcium superphosphate. The process of eliminating pollution of saponin producing effluent has low cost.

Description

Technical field [0001] The invention relates to a method for treating acid-containing organic waste water in saponin production, especially high-concentration acid-containing organic waste water, in particular to a method for producing superphosphate by using waste water generated in saponin production. Background technique [0002] At present, the production of saponin mostly adopts fermentation→acidolysis→extraction process, and a large amount of acid-containing organic wastewater is produced in the production process. For a saponin factory with 50 tons / year, the wastewater discharge is 60M 3 / d, chemical oxygen demand COD=30000mg / L~60000mg / L, PH=1~2. Difficulties in the treatment of saponin production wastewater include: 1) high chemical oxygen demand (COD), which makes it difficult to reduce to standard discharge; 2) GI - High concentration will affect biochemical treatment; 3) High acidity and large amount of neutralization drug will make the operation cost high. The ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01B25/32
Inventor 倪文斌
Owner 倪文斌
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