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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  • 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

Method used

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  • Method for wastewater comprehensive utilization of saponin production

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Example Embodiment

[0028] Example 1

[0029] The hydrolysate of yellow ginger 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 filtering, the combined eluate is low-concentration wastewater with a concentration of COD=5000mg / L. The wastewater is neutralized with alkali to PH6-8, supplemented with N and P nutrients. Anaerobic reactor (anaerobic filter), wastewater COD removal rate reaches 70%. The effluent COD concentration is 1500mg / L, and then treated by aerobic aeration tank, the effluent reaches COD=100mg / L for discharge.

[0030] Take 50 kg of the above-mentioned high-concentration wastewater, add 260 g of auxiliary (tall oil pine resin), combine 10 kg of low-concentration wastewater, and 10 kg of fluorosilicic acid produced in the production process of superphosphate to obtain m...

Example Embodiment

[0031] Example 2

[0032] The hydrolysate of Chuandilong hydrolyzed by sulfuric acid is filtered or centrifuged 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 with alkali to PH=7, supplemented with N and P nutrients. The flow-plate anaerobic reactor has a 78% removal rate of COD in wastewater. The effluent COD concentration reaches 1760mg / L, and then is treated by oxidation ditch, the effluent reaches COD 90mg / L discharge.

[0033] Take 10 kg of the above-mentioned high-concentration wastewater, add 1 g of auxiliary (tall oil fatty acid), combine 20 kg of low-concentration wastewater, and 20 kg of fluorosilicic acid produced in the superphosphate production process, and drive them into the slurry tank a...

Example Embodiment

[0034] Example 3

[0035] The hydrolysate of yellow ginger hydrolyzed by sulfuric acid is filtered or centrifuged to obtain high-concentration wastewater and filter cake. The filter cake has a moisture content of 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 with alkali to PH=7, supplemented with N and P nutrients. Oxygen digestion tank, wastewater COD removal rate reaches 78%. The COD concentration of effluent reaches 1760mg / L, and after SBR treatment, the effluent reaches COD of 90mg / L.

[0036]Take 70 kg of the above-mentioned high-concentration wastewater, add 60 g of auxiliary oleic acid, and drive it into a slurry tank to react with the slurry returned from the high-level slurry tank. Control the water content of the slurry tank mixed solution to 65%, the reaction temperature is controlled ...

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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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