CN1521133A

CN1521133A - Treatment method for waste water and waste residue in the production of diosgenin

Info

Publication number: CN1521133A
Application number: CNA031144276A
Authority: CN
Inventors: 宇保; 保宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-02-13
Filing date: 2003-02-13
Publication date: 2004-08-18

Abstract

The present invention is the effluent and slag treating process for dioscin production. The effluent treating scheme includes neutralization with alkali matter, fermentation via adding alcohol yeast and distillation of the fermented liquid to recover alcohol. The slag treating scheme includes mixing concentrated distillation residue and dioscin producing solid slag, and adding N, P and K containing matter to produce composite organic fertilizer. The said treating process can produce alcohol and composite organic fertilizer and eliminate the environmental pollution caused by the effluent and slag from dioscin production.

Description

The treatment process of waste water and dregs during diosgenin is produced

Affiliated technical field:

The present invention relates to the treatment process of waste water and dregs in a kind of diosgenin production, be mainly used in waste water, waste residue that produces in the thorough solution saponin producing process and the pollution problem that brings to environment.By this treating method, can from waste water, obtain ethanol, from waste residue, obtain compoiste fertilizer.

Background technology:

Diosgenin is a kind of important medical material, still, because its a large amount of waste water, waste residue of occurring in producing do not obtain the good treatment method all the time, so limited the development of diosgenin product.At present, the commercial run of producing saponin from tuberses such as yellow ginger and Dioscorea nipponica Mak. Ningpo Yam Rhizomes is: use the acid hydrolysis raw material, extract saponin with the exsiccant hydrolyzate again.Though use this method to produce the saponin technology maturation, produced the waste water of a large amount of high COD in the acid hydrolysis process.Simultaneously, behind the extraction saponin, also produce a large amount of solid slags, accounted for about 20% of raw material total amount.The Litter of the discharging of the waste water of high COD content and a large amount of solid slags naturally can serious environment pollution.For this waste water that contains COD, relevant paper proposes a kind of technology of handling with the biological method theoretically, but this complex process, industrial performance difficulty.Also have to introduce in the paper and from waste water, extract glucose, but this method has just reduced the COD content in the waste water, only is to reduce the degree of polluting, so do not reach the purpose that waste water is thoroughly administered.And for waste residue, common treatment process is: waste residue is participated in burn in the coal, for 25% waste residue, utilization ratio is too low economically for it.Simultaneously, be very easy to block flue, cause a lot of unnecessary troubles with coal while incendiary waste residue.

Summary of the invention:

For avoiding the defective of prior art, the present invention proposes the treatment process of waste water and dregs in a kind of diosgenin production, carbohydrate contained in the waste water is converted into ethanol, waste residue is processed as compoiste fertilizer, thoroughly solve the waste water and the waste residue that produce in the saponin production, the comprehensive utilization that the three wastes are handled in producing with the realization saponin.

Technological thought of the present invention is: the Normal juice hydrolyzed solution behind the production saponin, suitably allocate neutralization through alkaline matter, and add the ethanol yeast and ferment, the fermented liquid that fermentation is finished carries out the ethanol distillation operation to reclaim ethanol.

Distillation residue are condensed into solid and produce the remaining solid slag of saponin extracting and mix, add N, P, K material, make it become compoiste fertilizer.

The treatment process of waste water and dregs compared with prior art, can thoroughly solve waste water, waste residue that produces in the saponin producing process and the pollution problem that brings to environment during the diosgenin that the present invention proposes was produced.And technology implementation is strong, is convenient to promote.The overall technical architecture investment is low, the economic benefit height, and pollution treatment is thorough, has good social benefit and economic benefit.

Description of drawings:

Fig. 1: embodiment synoptic diagram

Embodiment:

Now in conjunction with the accompanying drawings the present invention is further described:

With waste water, waste residue behind the processing yellow ginger production saponin is example: yellow-ginger hydrolysate is pushed with extrusion machine, make to obtain hydrolyzed solution.The hydrolyzed solution that obtains with alkaline matter allotment neutralization, is made its PH=5.5～7.5 then, remove to add again behind the impurity and account for total amount 6%～14% ethanol yeast.Select the sweet potato dry yeast for use, under 25 ℃～35 ℃ temperature, carried out ethanol fermentation 2～5 days.The fermented liquid that fermentation is finished obtains ethanol through after filtering with conventional ethanol distillation column distillation recovery.

To the raffinate of retaining in the ethanol tower, can under 200 ℃～300 ℃ temperature, concentrate with efficient thickener.Waste residue after it is concentrated the solid obtain and produce saponin mixes, and adds an amount of carbon ammonium, urea element, phosphate fertilizer, potash fertilizer, obtains the mixture pulverizing after will mixing, and promptly obtains the powdery compoiste fertilizer.If through the shaper moulding, can obtain the particulate state compoiste fertilizer.

Claims

1, wastewater treatment method during a kind of diosgenin is produced, it is characterized in that: will produce the Normal juice hydrolyzed solution behind the saponin, suitably allocate neutralization through alkaline matter, add the ethanol yeast and ferment, the fermented liquid that fermentation is finished carries out ethanol distillation operation recovery ethanol.

2, wastewater treatment method during diosgenin according to claim 1 is produced is characterized in that: with alkaline matter allotment neutralization, make its PH=5.5～7.5

3, wastewater treatment method during diosgenin according to claim 1 is produced is characterized in that: add the ethanol yeast that accounts for total amount 6%～14%.

4, wastewater treatment method during diosgenin according to claim 1 is produced, it is characterized in that: ethanol fermentation is to carry out 2～5 days under 25 ℃～35 ℃ temperature.

5, the treatment process of waste residue during a kind of diosgenin is produced is characterized in that: the waste residue after will producing the solid slag behind the saponin and reclaiming ethanol, add N, P, K material, and pulverize to mix and makes it become compoiste fertilizer.

6, the treatment process of waste residue is characterized in that: to the raffinate of retaining in the ethanol tower, can be condensed into solid slag under 200 ℃～300 ℃ temperature with efficient thickener during diosgenin according to claim 5 was produced.

7, the treatment process of waste residue during diosgenin according to claim 5 is produced is characterized in that: adding N, P, K material can be: carbon ammonium, urea element, phosphate fertilizer, potash fertilizer.