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Method for producing general superphosphate from waste water of yellow ginger processing by dry method

A technology for superphosphate, processing wastewater, applied in chemical instruments and methods, peroxides/peroxyhydrates/peroxyacids/superoxides/ozone oxides, phosphorus compounds, etc. Unacceptable, large amount of wastewater treatment and other problems, to achieve the effect of low operating cost, reduced salt content, and reduced treatment difficulty

Inactive Publication Date: 2006-08-09
倪文斌
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The hydrolyzate of turmeric hydrolyzed by hydrochloric acid is filtered or centrifuged to obtain high-concentration waste water and filter cake, and 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 pH 6-8, supplemented with N and P nutrients, and passed through an anaerobic reactor (anaerobic contact digester), and the COD removal rate of the wastewater reaches 70%. The effluent COD concentration is 1500mg / L, and then the aerobic reactor (SBR) effluent reaches COD=100mg / L for discharge.

[0027] Get 1 kg of high-concentration waste water and combine 0 kg of low-concentration waste water, add 0 kg of defoamer oleic acid, and 0 kg of fluosilicic acid in the superphosphate production process to form a mixed acid solution, w...

Embodiment 2

[0029] The hydrolyzate of turmeric hydrolyzed by sulfuric acid is filtered or centrifuged to obtain high-concentration wastewater and filter cake, so that the water content of the filter cake reaches 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 waste water is neutralized by alkali to PH=7, supplemented with N and P nutrients, and passed through an anaerobic reactor (upflow anaerobic sludge bed) to make the waste water treatment rate reach 78%. The effluent COD concentration reaches 1760mg / L, and then the effluent COD reaches 90mg / L to be discharged through the aerobic reactor (oxidation ditch).

[0030] 100 kg of high-concentration waste water is combined with 200 kg of low-concentration waste water, 200 kg of fluosilicic acid in the superphosphate production process is mixed into a mixed acid solution, 0.25 kg of de...

Embodiment 3

[0032] The hydrolyzate of turmeric hydrolyzed by sulfuric acid is filtered or centrifuged to obtain high-concentration wastewater and filter cake, so that the water content of the filter cake reaches 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, supplemented with N and P nutrients, and the wastewater treatment rate reaches 78% through an anaerobic reactor (anaerobic filter). The effluent COD concentration reaches 1760mg / L, and then the aerobic reactor (aerobic aeration tank) effluent COD reaches 90mg / L for discharge

[0033] 100kg of high-concentration waste water and 150kg of 98% concentrated sulfuric acid are prepared into a 60% sulfuric acid solution, which is directly reacted with 300kg of measured ore powder in the chemical formation chamber. Its reaction time, temper...

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Abstract

The invention relates to a method to process waste water to produce ordinary calcium superphosphate in dry method by ginger. The method includes following steps: adopting hydrochloric acid or sulfuric acid hydrolyzed material to take filtering or centrifugal separation to gain eluate low concentrated waste water and fluosilicic acid mixture acid solution; adding antifoaming agent into mixture acid solution and mixing phosphate rock powder to form mixture; adding concentrated oil of vitriol and mixture acid solution in the formation room to gain vitriol acid solution to make ordinary calcium superphosphate. The invention decreases the process difficult and lowers cost. For the place that both has ordinary superphosphate producing company and saponin producing company, the invention also could solve saponin waste water pollution problem, and the cost is only 1 / 5-1 / 10 of the existing method.

Description

Technical field [0001] The invention relates to a method for treating acid-containing organic wastewater in turmeric processing, especially high-concentration acid-containing organic wastewater. 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 turmeric production wastewater include: 1) high chemical oxygen demand (COD), which makes it difficult to reduce to standard discharge; 2) high concentration of CI-, which affects biochemical treatment; High operating costs. The treatment of saponin wastewater has become a technical problem in the current turmeric processing. At present, the comprehensive utilization of wastewater combined with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B15/16C01B25/32
Inventor 倪文斌
Owner 倪文斌
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