Method for processing starch wastewater as well as product and application thereof

A treatment method and technology for starch wastewater, applied in the field of environmental engineering, can solve the problems that starch manufacturers are difficult to bear, difficult to treat starch wastewater, and high process costs, and achieve the effect of resource treatment.

Inactive Publication Date: 2012-12-12
GUANGXI UNIV FOR NATITIES +1
View PDF5 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved in the present invention is exactly to aim at the high cost of the current starch wastewater treatment technology, which is difficult for starch manufacturers to bear. At the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1. Preparation of mold seed solution

[0037] (1) Strain resurrection and expanded cultivation: Take Aspergillus niger, Rhizopus taiwanensis and Aspergillus oryzae strains out of the refrigerator, and inoculate them into their respective sterilized resurrection solid medium by ultra-clean bench operation, and place them in the incubator Incubate at 28°C for 3 days to revive the bacteria. The revived strains were inoculated on respective revived plate medium for expansion culture, and cultured in an incubator at 28°C for 5 days, so that the growth potential of the bacteria was the most vigorous, and colonies were formed.

[0038] (2) Seed liquid preparation: Pick a small amount of Aspergillus niger, Aspergillus oryzae and Rhizopus formosanus from the plates after the expanded culture and inoculate them into 30mL modified starch Martin medium, culture in a shaker at 28°C and 150rpm for 24h Finally, the absorbance value at 560nm was detected by a UV-visible spectrophotome...

Embodiment 2

[0045] Get the prepared Aspergillus niger seed liquid of 5.2mL embodiment 1, inoculate in 130mL cassava starch wastewater, total CODcr12335.1mg / L in this wastewater, total BOD 5 6789.2mg / L, SS8.4g / L, pH4.0. The initial pH value of the wastewater was adjusted to 5.0, the stirring speed was 180 rpm, and the fermentation was carried out at 29.5° C. for 24 hours. Continue to inoculate 5.2 mL of the Geotrichum candidum seed liquid prepared in Example 1, the stirring speed is 180 rpm, the pH value of the solution is 5.5, and ferment at 29.5° C. for 2 days. The CODcr value of wastewater was reduced by 86.6% by measuring the chemical oxygen demand CODcr (national standard GB11914-89) of the water quality by the dichromate method. The treated wastewater was centrifuged at 8000 rpm for 30 minutes to collect the precipitated bacteria, and the dry weight of the bacteria was measured. After the bacteria were frozen and thawed three times, the cells of the bacteria were disrupted in an ul...

Embodiment 3

[0047] Get the prepared Aspergillus niger seed liquid of 6mL embodiment 1, inoculate in 130mL cassava starch waste water, total CODcr12430.1mg / L in this waste water, total BOD 5 7695.4mg / L, SS9.6g / L, pH3.9. The initial pH value of the wastewater was adjusted to 5.5, the stirring speed was 200 rpm, and fermentation was carried out at 29.5°C for 24 hours. Continue to inoculate 6 mL of Rhodotorula rubrum seed solution prepared in Example 1, stirring at 200 rpm, pH of the solution at 6.5, and ferment at 29.5° C. for 2 days. The CODcr value of wastewater was reduced by 76.9% by measuring the chemical oxygen demand CODcr (national standard GB11914-89) of the water quality by the dichromate method. The treated wastewater was centrifuged at 8000 rpm for 30 minutes to collect the precipitated bacteria, and the dry weight of the bacteria was measured. After the bacteria were frozen and thawed three times, the cells of the bacteria were disrupted in an ultrasonic pulverizer (power 380W...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for processing starch wastewater and the application thereof. The method comprises the following steps: (1) mould is inoculated in starch wastewater for fermentation; and (2) saccharomycete is inoculated in the product obtained by fermentation in step (1) and the fermentation is continued to obtain the product. The mould comprises one or several out of aspergillus niger, Taiwan rhizopus and aspergillus oryzae. The fermentation conditions are as follows: after mould is inoculated in starch wastewater, the fermentation is performed for 16 hours at the temperature of 29.5 DEG C; the fermentation is continued after saccharomycete is inoculated and pH of fermentation broth is 5.0. The method utilizes the mutualism effect among microorganism and adopts the mixed culture fermentation method to process starch wastewater. The method can not only remove the main pollutants in starch wastewater, but also acquire single cell protein with high feed value, thereby realizing recycling processing of starch wastewater.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to a starch wastewater treatment method and its product and application. Background technique [0002] The starch processing industry is an industry with high water consumption. According to the current technological level in my country, the water used to produce each ton of starch products is about 30-40M 3 , the waste water produced is 20~30M 3 , The biological oxygen demand (BOD) and chemical oxygen demand (COD) of wastewater are high. Starch production enterprises discharge a large amount of high-concentration organic wastewater every year, and the wastewater treatment compliance rate of these starch production enterprises is still very low, which seriously pollutes the environment and has also become a major factor restricting the development of starch production and processing industries. [0003] At present, the treatment methods of starch wastewater mai...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F3/34A61K36/06A61K36/064A23K1/16A23L1/305C12N1/16C12N1/14C12R1/685C12R1/845C12R1/69C12R1/74C12R1/645
Inventor 廖安平黄江冲蓝平李媚蓝丽红谢涛吴如春时敏
Owner GUANGXI UNIV FOR NATITIES
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap