CN102198990A - Method for treating waste water in production of diosgenine - Google Patents
Method for treating waste water in production of diosgenine Download PDFInfo
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- CN102198990A CN102198990A CN 201110057967 CN201110057967A CN102198990A CN 102198990 A CN102198990 A CN 102198990A CN 201110057967 CN201110057967 CN 201110057967 CN 201110057967 A CN201110057967 A CN 201110057967A CN 102198990 A CN102198990 A CN 102198990A
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Abstract
The invention discloses a method for treating waste water in production of diosgenine. The method is characterized in that: a sulfuric acid hydrolysate and a filter-cake washing liquid obtained in a saponin production process are mixed, and ammonia water is added to neutralize to obtain a mixture with a neutral acidity; the mixture is treated with standing, a liquid is collected, and a purified water standard is achieved through multiple-effect distillation; and a jatex raffinate obtained after distillation is treated with subsequent processing to form ammonium sulfate composite fertilizers or ethanol. The method has a simple technology, the quality of processed water is fine, the standard of water for productive use can be satisfied, cyclic utilization can be realized, residues and waste liquids obtained after multiple-effect distillation can be comprehensively utilized, and zero waste water discharge is realized. According to the method, water processing cost only accounts for 35% of the cost of lime neutralization, but the speed of water processing is improved by eight times, so a problem of waste water processing existing in the diosgenine industry is thoroughly solved.
Description
Technical field
The present invention relates to a kind of method of wastewater treatment, be specifically related to the method for wastewater treatment in a kind of diosgenin production.
Background technology
Hydrolysis program in the diosgenin production process is a necessary step during saponin produces, and the acid waste water amount that the hydrolysis program produces is very big, if do not handle, and can serious environment pollution.Previously, this wastewater treatment method is had anaerobic process, biochemical process and membrane separation process etc. and since these method complex process, operation control ratio difficulty, comprehensive cost is very high, and treatment effect is also not so good.For this reason, the applicant has proposed a patent application that application number is " 200910022096.0 " in 2009, method of wastewater treatment in a kind of diosgenin production is disclosed, this method adopts lime neutral means that waste water is handled, although treatment effect is fine, also exist deficiencies such as processing cost is higher, processing speed is slow, labour intensity is big; In addition, owing to the water after handling will use as recirculated water, and the calcium ion of bringing in water treatment procedure has become the impurity in the saponin product, and the saponin quality of extracting has just been produced adverse influence.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology, the novel method of wastewater treatment in a kind of diosgenin production is proposed, this method can not only make water technology quality simpler, that handle better, and the raffinate after the water treatment can be made full use of, make factory effluent really reach zero release.
The technical scheme that realizes above-mentioned purpose is: sulphuric acid hydrolysis liquid in the saponin producing process and filter cake washing liquid are merged, add ammoniacal liquor and neutralize, make its acidity reach neutral, leave standstill, solid substance is fully precipitated, collect clear liquid then and make it reach the water purification standard by multi-effect distilling; By subsequent disposal, make it become ammonium sulfate composite fertilizer or ethanol distillatory underflow raffinate.
The preferred version of above-mentioned technology is: the concentration that adds ammoniacal liquor is more than 12%.
The temperature controlling range of above-mentioned multi-effect distilling is at 55 ℃-145 ℃.
The subsequent disposal of above-mentioned underflow raffinate is: distillatory underflow raffinate through concentrated, crystallization, drying, is produced ammonium sulfate composite fertilizer; Or, produce ethanol with its dilution back adding saccharomycetes to make fermentation.
Can prove the technique effect of the inventive method below by detecting data:
(1) wastewater characteristics:
Table 1 acid waste water detects data
| pH | Colourity | COD/mg | Sugar degree (%) | Smell | Outward appearance |
| 0.6 | 7000 | 95000 | 6-7.5 | Tart flavour | Reddish-brown |
(2) contrast before and after the waste water neutralizing treatment:
Detect data before and after the table 2 waste water neutralizing treatment
| pH | Colourity | COD | Smell | Sugar degree (%) | Outward appearance | |
| Before the processing | 0.6 | 7000 | 95000 | Tart flavour | 6-7.5 | Reddish-brown |
| After the processing | 6～7 | 8500 | 65000 | Acescency | 6-7 | Dark red brown |
(3) contrast before and after the multi-effect distilling (temperature: 55 ℃-145 ℃):
Before and after handling, table 3 waste water multi-effect distilling detects data
| pH | Colourity | COD | Smell | Sugar degree (%) | Outward appearance | |
| Before the processing | 6～7 | 8500 | 65000 | Acescency | 6-7 | Dark red brown |
| After the processing | 6-7 | 0 | 750 | Tasteless | 0 | Water white transparency |
The inventive method technology is simpler, and the quality after the processing is better, satisfies the standard of water of productive use, can recycle; Residue waste liquid behind the multi-effect distilling can fully utilize, and turns waste into wealth, and has realized wastewater zero discharge, has reached the effect that cleans production.Use this method, cost of water treatment only is 35% of a lime neutralisation, and water treatment speed has but improved 8 times than lime neutralisation, has thoroughly solved a diosgenin industry wastewater treatment difficult problem, and large-scale saponin is produced can carry out smoothly.
Embodiment
The invention will be further described below in conjunction with embodiment.
Embodiment 1
Sulphuric acid hydrolysis liquid in the saponin producing process and the merging of washing filter cakes liquid are concentrated in the pond, adding concentration is the ammoniacal liquor more than 12%, stirring neutralization makes it reach neutral, leave standstill 30-60min, collect clear liquid then, distill with multiple-effect evaporator, temperature is controlled to be 55 ℃-145 ℃ in the still-process.The neutral colourless water that steams accounts for 70% of total amount, can be used as the cyclic production water.At last remaining underflow raffinate at the bottom of the tower is concentrated in together, carry out secondary concentration, cooling, centrifugation, get solid ammonium sulfate.
Embodiment 2
Get 300L concentration (solid content) and be underflow raffinate at the bottom of 30% the tower, add 30 ℃ warm water 300L, add the yeast that 2.5-3.5kg activates again, 28 ℃ of-35 ℃ of environment fermentations three days, distillation then, 7.5 degree-11 degree ethanol 200L-300L.
Embodiment 3
Get 300L concentration (solid content) and be underflow raffinate at the bottom of 30% the tower, add in the 1000L alcohol mellow solution of saccharification, stir, add the yeast that 4kg activates, 28 ℃ of-35 ℃ of environment fermentations three days, distillation then, the about 300L of ethanol that must about 32 degree.
Claims (4)
1. the method for wastewater treatment during a diosgenin is produced, it is characterized in that: sulphuric acid hydrolysis liquid in the saponin producing process and filter cake washing liquid are merged, add ammoniacal liquor and neutralize, make its acidity reach neutral, leave standstill, collect clear liquid then and make it reach the water purification standard by multi-effect distilling; By subsequent disposal, make it become ammonium sulfate composite fertilizer or ethanol distillatory underflow raffinate.
2. according to the described method of wastewater treatment of claim 1, it is characterized in that: the concentration of described adding ammoniacal liquor is more than 12%.
3. according to the described method of wastewater treatment of claim 1, it is characterized in that: the temperature controlling range of described multi-effect distilling is at 55 ℃-145 ℃.
4. according to the described method of wastewater treatment of claim 1, it is characterized in that: the subsequent disposal of described underflow raffinate be with distillatory underflow raffinate through concentrating, crystallization, drying, produce ammonium sulfate composite fertilizer; Or, produce ethanol with its dilution back adding saccharomycetes to make fermentation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110057967 CN102198990A (en) | 2011-03-04 | 2011-03-04 | Method for treating waste water in production of diosgenine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110057967 CN102198990A (en) | 2011-03-04 | 2011-03-04 | Method for treating waste water in production of diosgenine |
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| CN102198990A true CN102198990A (en) | 2011-09-28 |
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| CN 201110057967 Pending CN102198990A (en) | 2011-03-04 | 2011-03-04 | Method for treating waste water in production of diosgenine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109776139A (en) * | 2019-04-01 | 2019-05-21 | 陕西科技大学 | Using production Chinese yam saponin slubbing waste water preparation apple foliage fertilizer, and preparation method thereof and fertilizing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461742A (en) * | 2002-05-27 | 2003-12-17 | 马最瑶 | Process for treating waste water and dregs of yam saponin industry |
| CN1488581A (en) * | 2003-08-14 | 2004-04-14 | 华中师范大学 | Yellow giner saponin industrial sewage treating method and comprehensive utilization |
| CN1521133A (en) * | 2003-02-13 | 2004-08-18 | 宇 保 | Treatment method for waste water and waste residue in the production of diosgenin |
| CN101863578A (en) * | 2009-04-20 | 2010-10-20 | 城固县振华生物科技有限责任公司 | Waste water processing method in yam saponin production |
-
2011
- 2011-03-04 CN CN 201110057967 patent/CN102198990A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1461742A (en) * | 2002-05-27 | 2003-12-17 | 马最瑶 | Process for treating waste water and dregs of yam saponin industry |
| CN1521133A (en) * | 2003-02-13 | 2004-08-18 | 宇 保 | Treatment method for waste water and waste residue in the production of diosgenin |
| CN1488581A (en) * | 2003-08-14 | 2004-04-14 | 华中师范大学 | Yellow giner saponin industrial sewage treating method and comprehensive utilization |
| CN101863578A (en) * | 2009-04-20 | 2010-10-20 | 城固县振华生物科技有限责任公司 | Waste water processing method in yam saponin production |
Non-Patent Citations (1)
| Title |
|---|
| 《哈尔滨建筑大学学报》 19991231 陈志强等 低压蒸馏法处理高浓度中药废水的研究 1-4 第32卷, 第6期 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109776139A (en) * | 2019-04-01 | 2019-05-21 | 陕西科技大学 | Using production Chinese yam saponin slubbing waste water preparation apple foliage fertilizer, and preparation method thereof and fertilizing method |
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Application publication date: 20110928 |