Patents
Literature
Patsnap Copilot is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Patsnap Copilot

667 results about "Short-chain fatty acid" patented technology

Short-chain fatty acids (SCFAs) are fatty acids with less than six carbon atoms. Derived from intestinal microbial fermentation of indigestible foods, SCFAs are the main energy source of colonocytes, making them crucial to gastrointestinal health.

Method for improving acid production quality and acetic acid proportion in anaerobic fermentation of residue active sludge

The invention relates to a method for improving acid production quality and acetic acid proportion in anaerobic fermentation of residue active sludge. The method comprises the following steps of firstly, adding calcium peroxide into concentrated residual sludge in a wastewater treatment plant, wherein adding amount of the calcium peroxide is 5%-20% of the weight of the volatile suspended solid in the residual active sludge; then, sealing at 30-40 DEG C, carrying out anaerobic digestion in an anaerobic digestion tank with stirring speed of 100-200rpm, wherein the anaerobic digestion time is 5-10 days. The result indicates that calcium peroxide can promote dissolution of particulate organic substances, can improve acidification degree of deliquescent organic substances and can inhibit a methane production process, so that accumulation of volatile short-chain fatty acid is facilitated and transformation of other acids to acetic acid is promoted; meanwhile, a plurality of harmful organic substances in the sludge are effectively removed, so that the acid production quality in anaerobic fermentation of the residue active sludge is improved. The method disclosed by the invention is simple to operate and gentle in reaction condition, is used for recycling and carrying out harmless disposal on the concentrated residual sludge of the sewage treatment plant, and has very good economic and social benefits.
Owner:TONGJI UNIV

Method for utilizing nano ferroferric oxide for improving activity of anaerobic digestion methanogens and methanogenesis efficiency

InactiveCN104529116AMeet needsBreaking through thermodynamic barriersWater treatment compoundsWaste based fuelPhosphateElectron donor
The invention relates to a method for utilizing nano ferroferric oxide for improving the activity of anaerobic digestion methanogens and methanogenesis efficiency. The method aims at solving the problems that in the prior art, the addition concentration of Fe2+/Fe3+ is hard to control, negative ion inhibition is caused, bioavailability is low, the chemical property is unstable, and cost is high. The method comprises the steps that short chain fatty acid salt is adopted as an electron donor, amine salt is adopted as a nitrogen source, phosphate is adopted as a phosphorus source, system basicity is maintained, and under the culture condition of continuous flow anaerobic fermentation, anaerobic mixed granule sludge is separated, and mixed seed sludge is obtained; the short chain fatty acid salt is adopted as the electron donor, the amine salt is adopted as the nitrogen source, the phosphate is adopted as the phosphorus source, the system basicity is maintained, the nano ferroferric oxide is adopted as an iron ion donor, the mixed seed sludge is adopted as inoculation sludge, and culturing is carried out under the static anaerobic fermentation condition. The method is used for improving the activity of the anaerobic digestion methanogens and the methanogenesis efficiency.
Owner:HARBIN INST OF TECH

Method for treating high-content ammonia and nitrogen for shortcut nitrification to discharge effluent by coupling simultaneous denitrification of sludge fermentation with autotrophic nitrogen removal

The invention discloses a method for treating high-content ammonia and nitrogen for shortcut nitrification to discharge effluent by coupling simultaneous denitrification of sludge fermentation with autotrophic nitrogen removal, belonging to the technical field of biochemical process sewage treatment. The high-efficiency removal of total nitrogen in wastewater and the reduction of sludge are realized in the same space by combined action of hydrolysis acidifying bacteria, denitrifying bacteria and anaerobic ammonium oxidation bacteria. The method is characterized in that part of NO2--N in effluent is reduced by short-chain fatty acid generated by hydrolytic acidification of residual sludge under the action of the denitrifying bacteria; and the other part of NO2--N and ammonia nitrogen released in the hydrolytic acidification process are removed by an anaerobic ammonia oxidation reaction, thereby greatly reducing the concentration of total nitrogen in the effluent and finishing the reduction of the residual sludge simultaneously. The technology is suitable for advanced treatment of high-content ammonia and nitrogen for shortcut nitrification to discharge the effluent.
Owner:TIANJIN HUANCHUANG TECH DEV CO LTD

GC-MS (gas chromatography-mass spectrometer)-based method for quantifying eleven types of short-chain fatty acids in intestinal contents and fecal samples

The invention belongs to the technical field of endogenous substance detection and discloses a GC-MS (gas chromatography-mass spectrometer)-based method for quantifying eleven types of short-chain fatty acids in intestinal contents and fecal samples. By adoption of a hydrochloric acid solution prepared from saturated salt water for acidification, high-stability ethyl acetate for extraction and N-tert-butyldimethylsilyl-N-methyl trifluoroacetamide MTBSTFA for derivatization, the eleven short-chain fatty acids in mouse intestinal contents and fecal samples are quantified by a gas chromatography-mass spectrometer. The method is high in accuracy and precision and low in detection limit, can be used for quantitative detection of eleven types of short-chain fatty acids and can meet detection requirements on determination of major short-chain fatty acids in the mouse intestinal contents and the fecal samples. Moreover, the method is conducive to analysis and comparison of metabolic disposition laws of the short-chain fatty acids under normal and enteritis conditions and observation whether changes of the short-chain fatty acids can represent dynamic conditions of enteritis or not, thereby providing significant bases for potential biomarkers under the enteritis condition.
Owner:CHINA PHARM UNIV

Rosa roxburghii polysaccharide, as well as preparation method and application thereof

The invention discloses a rosa roxburghii polysaccharide, as well as a preparation method and application thereof. The preparation method mainly comprises raw material pretreatment, extraction, deproteinization, de-coloration, alcohol precipitation, as well as separation and purification, wherein the extraction is to mix pretreated rosa roxburghii dry powder and water in a mass volume ratio of (1to 15) to (1 to 35), and perform extraction at a temperature of 55 to 95 DEG C; perform centrifugal separation to obtain a rosa roxburghii polysaccharide extracting solution, and concentrate the rosaroxburghii polysaccharide extracting solution under reduced pressure to 1 / 3 to 1 / 6 of the original volume to obtain a concentrated solution of the rosa roxburghii polysaccharide. The rosa roxburghii polysaccharide prepared by the invention has the advantages of high purity and uniform molecular weight. Compared with the existing rosa roxburghii polysaccharide, as proved by in-vitro fermentation experiments, the rosa roxburghii polysaccharide disclosed by the invention can promote the generation of short-chain fatty acids such as acetic acid, propionic acid and butyric acid, promote the growthof beneficial bacteria such as lactic acid bacteria and bifidobacterium, and can be taken as prebiotics. Meanwhile, the rosa roxburghii polysaccharide can inhibit the activity of alpha-glucosidase, and can be applied to healthy foods or medicines having auxiliary therapy effects on intestinal diseases and diabetes mellitus.
Owner:SOUTH CHINA UNIV OF TECH

Pharmaceutical composition for the management of tumors

The present invention relates to the effect of naturally occurring compounds on tumor development. As an example of proof, we used low; non-toxic doses of three compound e.g. Calcium D-glucarate, a naturally occurring Ca++ salt of D-glucaric acid; Nicotinamide (NA), a naturally occurring vitamin and butyric acid (BA), a naturally occurring saturated short chain fatty acid. 7,12 dimethylbenzanthracene (DMBA), which is a very potent skin carcinogen and is an environmental pollutant, was used for skin tumor development. Experiment was performed upto 30 weeks. All the above-mentioned compounds were used either alone or concomitantly any two or all the three. In the positive control group 100% tumorigenesis was attained in 28 weeks, use of single compound led to the inhibition of DMBA induced tumorigenesis between 33 to 47%, use of two compounds resulted in the 73 to 80% reduction in tumorigenesis but the concomitant use of three compounds resulted into 100% inhibition of tumor development at the end of 30 weeks. This led us to conclude that the concomitant use of Cag, NA and BA in combination of two is useful for preventing skin tumor develoment for a sort or long period of time. But the concomitant use of all the three compounds, as described, exhibited the perfect synergistic effect in preventing the tumor development completely. This strategy should be equally effective in the management of benign and possibly malignant tumor in any organ caused by any mean.
Owner:COUNCIL OF SCI & IND RES

Method for acquiring denitrified carbon source by fermenting surplus sludge

The invention relates to a method for acquiring a denitrified carbon source, particularly a method for acquiring a denitrified carbon source by fermenting surplus sludge. The method comprises the following steps: 1. carrying out ultrasonic pretreatment on surplus sludge, and fermenting; and 2. aerating the supernatant generated after fermentation, and treating the supernatant by a guano process, wherein effluent water of a reaction tank is the denitrified carbon source acquired by fermenting surplus sludge. The raw material adopted by the method is waste in municipal sewage plants, and therefore, the invention achieves the purpose of changing waste into resources; sludge generated in the sewage plants is treated on the spot to produce a carbon source, thereby saving the transportation expenses; surplus sludge after fermentation is converted into harmless substances, the amount of the sludge is reduced, and the surplus sludge can be further composted or fermented to produce methane or can be landfilled, thereby facilitating the subsequent treatment and lowering the cost; when being used as a carbon source, the generated sludge supernatant has the advantages of high content of short chain fatty acids and high C/N ratio; and the effluent water of the reaction tank can be directly transmitted into a denitrification reaction tank and used as a carbon source.
Owner:HARBIN INST OF TECH
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