180 results about "Microbial system" patented technology

Methods, enzymes, recombinant microorganism, and microbial systems are provided for converting polysaccharides, such as those derived from biomass, into suitable monosaccharides or oligosaccharides, as well as for converting suitable monosaccharides or oligosaccharides into commodity chemicals, such as biofuels. Commodity chemicals produced by the methods described herein are also provided. Commodity chemical enriched, refinery-produced petroleum products are also provided, as well as methods for producing the same.

The invention discloses a method for quickly starting a completely autotrophic nitrogen removal over nitrite process on sewage on the conditions of constant temperature and low ammonia nitrogen and belongs to the field of city sewage treatment and reutilization. The completely autotrophic nitrogen removal over nitrite (CANON) process is started in a biological filter tank reactor and comprises the following steps: firstly, nitrifying sludge by using an inoculating part, and performing aerobic nitrification start with sufficient oxygen supply to build a nitrosobacteria-dominated and nitrobacterium-dominated microorganism system; inhibiting the growth of nitrobacterium through intermittent aeration / anaerobism and enriching anaerobic ammonium oxidation bacteria; and finally, performing continuous aeration, controlling ammonia nitrogen to be oxidized to a stage of nitrous acid through restrictive oxygen supply, and optimizing microenvironment where nitrosobacteria and anaerobic ammonium oxidation bacteria coexist so as to successfully start the CANON process. By using the method, the problem that the growth enrichment of the anaerobic ammonium oxidation bacteria is slower for a long term can be solved; moreover, the starting way is simple and feasible, and the difficulty of the start of a single-stage autotrophic nitrogen removal system is reduced; and therefore, a method is provided to start the CANON process on stimulated waste water on the conditions of constant temperature and low ammonia nitrogen.

Dairy compositions are provided having a high pH, of about 4.8 to about 6.2, comprising desirable probiotic cultures as well as an anti-microbial system for inhibiting undesirable pathogenic and / or spoilage microbial growth without significantly reducing the beneficial effect of the probiotic cultures.

Methods for engineering transgenic organisms that synthesize polyhydroxyalkanoates (PHAs) containing 3-hydroxyhexanoate as comonomer have been developed. These processes are based on genetically engineered bacteria such as Escherichia coli or in plant crops as production systems which include PHA biosynthetic genes from PHA producers. In a preferred embodiment of the method, additional genes are introduced in wild type or transgenic polyhydroxybutyrate (PHB) producers, thereby creating new strains that synthesize 3HH monomers which are incorporated into PHAs. The 3HH monomer preferably is derived in microbial systems using butanol or butyrate as feedstocks, which are precursors of 3-hydroxyhexanoyl-CoA. Pathways for in vivo production of butyrol-CoA specifically encompassing butyryl-CoA dehydrogenase activity are provided.

The invention relates to a salt-tolerant COD removal denitrifying microbial agent. The microbial agent consists of at least one of paracoccus sp FSTB-2, microbacterium kitamiense FSTB-4 and pseudomonas stutzeri FSTB-5, and further consists of at least one of paracoccus denitrificans DN-3 and methylobacterium phyllosphaerae SDN-3, wherein the paracoccus sp FSTB-2, the microbacterium kitamiense FSTB-4 and the pseudomonas stutzeri FSTB-5 are preserved in China General Microbiological Culture Collection Center on June 1, 2015, with preservation numbers of CGMCC No.10938, CGMCC No.10939 and CGMCC No.10940; and the paracoccus denitrificans DN-3 and the methylobacterium phyllosphaerae SDN-3 are disclosed in CN102465104A and CN102465103, and the preservation numbers of the paracoccus denitrificans DN-3 and the methylobacterium phyllosphaerae SDN-3 are CGMCC No.3658 and CGMCC No.3660. The microbial agent can be used for directly processing total nitrogen and COD in high-salinity wastewater, and the microbial agent can be also added to various biochemical reaction constructions so as to improve microbiological composition, optimize the salt tolerance of a microbial system in wastewater treatment and improve total nitrogen and COD removal rate of the entire process.

The present invention relates to environment protecting technology, and is especially the starting method of biological denitrogenation reactor. The present invention provides one kind of fast and efficient method of starting anaerobic ammoxidation reactor and culturing microbe, i. e., aerobic starting. In the continuous culture mode, fixed bed biological membrane reactor as culture device, aerobic active sludge as bacteria seed, ammonia nitrogen waste water as culture liquid are adopted to culture biomembrane in aerobic condition. The culture process is controlled in the nitrifying stage, and after the nitrifying activity of the microbial system is strengthened gradually, nitrifying bacteria in the biomembrane are enriched and the nitrifying biomembrane is aerobically cultured, aeration is stopped before starting anaerobic ammoxidation.

The invention provides a method for culturing a Luzhou-flavor liquor culture solution with pit mud. The culture solution with pit mud, which is prepared by utilizing high-quality aged pit mud, an extract mixture, Daqu, yellow clay, a growth factor and liquor making by-products (distiller's grains, yellow water, and the like) is rich in beneficial liquor making microbes and nutrients, which are suitable for making liquor. The method has the beneficial effects that by adding the culture solution with pit mud during pit mud production, pit maintenance and pit rejuvenation, not only are seeds of the beneficial liquor making microbes added equivalently, so that the beneficial liquor making microbes grow and propagate rapidly in the pit mud and pits, thus increasing the contents and biological activities of the beneficial liquor making microbes in the pit mud and pits, but also the proportion and the growing environments of the nutrients, such as pH, can be regulated, the beneficial liquor making functional microbial systems in the pit mud and fermented grains can be enriched and coordinated, degradation of the pit mud can be delayed and the contents and proportion of flavor components in Luzhou-flavor liquor can be coordinated, thus finally achieving the aim of improving the quality of the liquor.

Methods, enzymes, recombinant microorganism, and microbial systems are provided for converting suitable monosaccharides or oligosaccharides, such as those derived from biomass, as well as various aldehydes and / or ketones, into commodity chemicals, such as biofuels. Commodity chemicals produced by the methods described herein are also provided. Commodity chemical enriched, refinery-produced petroleum products are also provided, as well as methods for producing the same.

Provided are improved recombinant microorganisms, and methods of use thereof, for metabolizing biomolecules and producing commodity chemicals such as ethanol therefrom, and genetic constructs to achieve that end.

The invention discloses a lake eutrophication remediation method, which comprises the following steps of: (1) sequentially arranging a microbial remediation water tank, an absorption water tank and a cooling water tank on lakeshore in a half-burying way; (2) performing microbial remediation; (3) performing absorption; (4) performing cooling; and (5) performing ecological remediation in water. In the microbial remediation stage of the method, microorganisms grow stably in a certain controllable environment so as to achieve high microorganism survival rate; the microorganisms form a biomembrane system in a filler to achieve strain diversity; the microorganism system rapidly reduces the chemical oxygen demand (COD), biochemical oxygen demand (BOD) and ammonia nitrogen of organic pollutants without producing organic sludge and causing secondary pollutions; the method ensures high water purification dephosphorization efficiency; and exception handling for realizing a temperature reduction function is performed in the high temperature environment of a water bloom peak period.