Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Treatment and high-value application method of biodegradable sewage

A sewage treatment and high-value technology, which is applied in the fields of environmental protection and comprehensive utilization of resources, can solve the problems of small treatment scale, high requirements for control of feeding and operating conditions, and high cost, and achieves easy storage and transportation, good hydrophobicity, and high cost. Avoid the effect of the input of electrical energy

Active Publication Date: 2018-09-21
TONGJI UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electricity is an additional clean energy with high cost, and the method has a small processing scale and requires high control over feed materials and operating conditions.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment and high-value application method of biodegradable sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The treatment object is the papermaking wastewater produced by a paper mill, COD Cr About 25000~30000mg / L. The anaerobic granular sludge from the anaerobic sewage treatment of the plant was introduced into the anaerobic reactor of the fermentation unit and the carbon chain biological extension unit as the starting agent, and the inoculation amount was 10g VS / L. In the carbon chain extension reactor, 50mM 2-BES (sodium 2-bromoethanesulfonate) is added to inhibit the metabolic activity of methanogens, and domesticate the dominant bacteria group for carbon chain extension metabolism. The reaction temperature is 35±1°C. pH 7±0.2, hydraulic retention time equal to 6 days. The carbon chain extension unit passes into brewery wastewater (which contains 5-6% ethanol) to provide electron donor electrons. Separation of n-hexanoic acid by liquid-liquid osmotic extraction.

[0049] During 120 days of operation, the average yield of n-hexanoic acid is about 5.32g / L / d, the maximum ...

Embodiment 2

[0051] The treatment object is beer wastewater produced by a brewery, COD Cr About 20000~25000mg / L. The anaerobic sludge produced by domestic sewage treatment was introduced into the anaerobic reactor of the fermentation unit and the carbon chain biological extension unit as the starting agent, and the inoculation amount was 8g VS / L. In the carbon chain elongation reactor, the metabolic activity of methanogens is inhibited by controlling pH=5.5, and the dominant bacteria group for carbon chain elongation metabolism is domesticated. The reaction temperature is 30±1°C, pH 5.5, and the hydraulic retention time is equal to 5 days. The sewage itself contains 5% to 6% of ethanol, and there is no need to add alcohol-containing sewage. Extraction and separation of n-hexanoic acid by hollow fiber membrane.

[0052] During the 550-day running time, the average yield of n-hexanoic acid was 3.38±0.42g / L / d, and the COD removal rate was greater than 85%.

Embodiment 3

[0054] The object of treatment is anaerobic fermentation broth of syngas, COD Cr About 15000~20000mg / L, containing 11.4g / L ethanol and 2.3g / L acetic acid. The anaerobic sludge produced by domestic sewage treatment was introduced into the anaerobic reactor of the fermentation unit and the carbon chain biological extension unit as the starting agent, and the inoculation amount was 6g VS / L. In the carbon chain extension reactor, the metabolic activity of methanogenic bacteria is inhibited by controlling pH=5.5, and the dominant bacteria group for carbon chain extension metabolism is domesticated. The reaction temperature is 30±1°C, pH 5.5-6.5, and the hydraulic retention time is equal to 8 days. . The sewage itself contains ethanol, and there is no need to add alcohol-containing sewage. Extraction and separation of n-hexanoic acid by ion exchange membrane.

[0055] During 550 days of operation, the average yield of n-hexanoic acid is about 1.7g / L / d, and the average yield of n-...

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 relates to a treatment and high-value application method of biodegradable sewage. The treatment and high-value application method of the biodegradable sewage includes the following stepsthat anaerobic sludge is introduced into an anaerobic reactor of a fermentation unit and an anaerobic reactor of a carbon chain biological extension unit separately to serve as an initial bactericidefor hydrolytic acidification and carbon chain biological extension; in the anaerobic reactor of the carbon chain biological extension unit, the metabolic activity of methane producing bacteria is inhibited, and dominant bacterial communities for carrying out carbon chain extension metabolism are acclimatized; alcohol containing sewage is introduced into the carbon chain biological extension unit,a reduction environment is built of carbon chain extension bacterial communities, and electrons needed by carbon chain extension metabolism processes are provided; the biodegradable sewage passes through the fermentation unit, the carbon chain biological extension unit and a product isolation unit in sequence, finally, water and medium-chain organic acid are isolated from the product isolation unit, and waste sludge is obtained from the fermentation unit. Compared with the prior art, the treatment and high-value application method of the biodegradable sewage is simple; the biodegradable sewage is treated, and at the same time, high-value products are obtained; therefore, the treatment and high-value application method of the biodegradable sewage can be widely popularized and applied to treatment and recycling application of the biodegradable sewage.

Description

technical field [0001] The invention belongs to the fields of environmental protection and resource comprehensive utilization, and in particular relates to a method for easy biochemical sewage treatment and high-value utilization. Background technique [0002] A large amount of biochemical sewage is produced in my country every year, such as distiller's grain wastewater, kitchen waste extrusion wastewater, slaughter wastewater, livestock and poultry breeding wastewater, urban domestic sewage, and primary leachate of garbage. This type of sewage has a high concentration (COD Cr The concentration can reach more than 20000mg / L), the properties and sources are different, the components are complex, and the degree of pollution to the environmental water body is large, which increases the difficulty of sewage treatment, and it is difficult to ensure the stable operation of sewage treatment and discharge up to the standard. On the other hand, this type of sewage has good biodegrad...

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): C02F9/14C02F101/30C02F101/34C02F103/20C02F103/22C02F103/32C02F103/34
CPCC02F1/70C02F3/28C02F9/00C02F2101/30C02F2101/34C02F2103/20C02F2103/22C02F2103/325C02F2103/34
Inventor 何品晶韩文昊吕凡邵立明
Owner TONGJI UNIV
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com