36results about How to "Increase the rate of acid production" patented technology

The invention belongs to the technical field of environmental protection and relates to a method for improving the methanogenesis of residual sludge by heat and alkali combined pretreatment. According to the method, after the residual sludge is thermally pretreated, the dissolving in water of organic matters such as protein and polysaccharide in the residual sludge can be improved significantly so that abundant water-soluble organic matrixes can be provided for the fermentation of the sludge and the generation of acids; and in addition, after the residual sludge is pretreated under the initial alkaline condition, the dissolving and the dehydrating of the sludge can be promoted further and short chain fatty acids can be produced continuously. Therefore, the residual sludge dehydrating efficiency and the acid generating efficiency can be improved greatly by the combination of thermal pretreatment and the initial alkaline condition so that the yield of methane can be increased to the maximum extent.

The invention discloses a short-chain volatile fatty acid and a preparation method thereof. The preparation method for the short-chain volatile fatty acid comprises the following steps of employing sludge as a fermentation substrate; adding sodium nitrite into the fermentation substrate, performing pretreatment in an acid environment, and performing anaerobic fermentation under an alkaline condition to obtain the short-chain volatile fatty acid. According to the short-chain volatile fatty acid and the preparation method thereof, the sludge of a sewage treatment plant is taken as a raw material, and is jointly treated by virtue of free nitrite pretreatment and alkaline anaerobic fermentation, and the concentration of free nitrite in the system, the pretreatment time, the fermentation pH value and the action of microorganisms in the sludge are controlled to maximally convert undissolved sludge organic matters in the sludge into the short-chain volatile fatty acid, so that the yield of the volatile fatty acid produced from the sludge is further increased on the basis of resourcefully utilizing the sludge and reducing environmental pollution caused by the sludge, and the reaction time is shortened; the short-chain volatile fatty acid and the preparation method thereof have the advantages of high product yield, simple preparation method, energy conservation, consumption reduction, low running cost and the like.

The invention discloses a Lactobacillus paracasei 761, application of the Lactobacillus paracasei 761, a silage additive and silage. The Lactobacillus paracasei 761 is deposited at China General Microbiological Culture Collection Center, and the deposit number is CGMCCNo.18234; the Lactobacillus paracasei 761 can improve the quality of the silage in high-temperature and high-humidity areas, and the silage treated by the Lactobacillus paracasei 761 has better aerobic stability, can reduce pH, aflatoxin B1 and dry matter loss and has good high-temperature resistance and acid resistance and goodadaptability to the environment, under culturing in high-temperature conditions, the growth and acid production of the Lactobacillus paracasei 761 has no significant lag phase, and can achieve rapid acid production to achieve the effect of lower pH .

The invention relates to a method for promoting residual sludge anaerobic fermentation to produce fatty acid through potassium peroxymonosulfate sulfate compound salt (PMS). The method specifically comprises the following steps: (1) treating residual active sludge generated by a secondary sedimentation tank of a municipal sewage treatment plant as a fermentation raw material, and naturally settling to remove liquid supernatant to concentrate and treat to obtain a sludge sample; (2) mixing and pre-treating the sludge sample with potassium peroxymonosulfate sulfate compound salt (PMS), and fermenting under an anaerobic environment to generate fatty acid. After residual sludge is subjected to PMS pretreatment, dissolving of organic substances in sludge is quickened, and activity of acid-consuming microorganisms such as methanogenic bacteria is further inhibited sufficiently, and therefore, the acid yield is greatly increased, and sludge anaerobic fermentation time is shortened; and moreover, the method provided by the invention is simple in operation, and has important environment-friendly ecological significance for reducing, recycling and stabilizing sludge.

The invention discloses a method for reducing biogenic amine through cyclic rice soaking by inoculating lactobacillus plantarum not generating the biogenic amine, and belongs to the technical field offood processing and manufacturing. The lactobacillus plantarum is inoculated in the rice soaking process of a grain product; the result shows that by inoculating the lactobacillus plantarum, the content of the biogenic amine in rice soaking water can be effectively reduced, so that the rice soaking water is clear; and conditions are created for the cyclic utilization of rice milk water.

The invention relates to a method for producing a short-chain fatty acid employing combined pretreatment of activated sludge. The method comprises the following steps: (1) carrying out gamma-ray irradiation on activated sludge, so as to prepare gamma-ray irradiated sludge; (2) carrying out ultrasonic treatment on the gamma-ray irradiated sludge, so as to prepare ultrasonic-treated sludge; and (3) adjusting the pH value of ultrasonic-treated sludge, carrying out anaerobic fermentation, so as to prepare the combined pretreated activated sludge. After the activated sludge is subjected to gamma-ray irradiation and ultrasonic treatment, organic matters such as protein and polysaccharide in the sludge dissolved into water can be significantly improved, so that an abundant organic matrix which can be dissolved into water is provided for fermentation and acidogenesis of sludge; the acid production rate of the sludge is improved; the anaerobic fermentation time of the sludge is shortened; and the method has important significance in improvement and optimization of an existing sludge treatment system, energy conservation and consumption reduction, and reduction of the operation cost.

The invention relates to a method for promoting degradation of pollutants in excess sludge and producing fatty acid. The method comprises the following specific steps: firstly, taking excess activatedsludge generated by a secondary sedimentation tank of an urban sewage treatment plant as a fermentation raw material, naturally settling to remove supernate and carrying out concentrated treatment toobtain a sludge sample; secondly, mixing the sludge sample with potassium persulfate, pretreating a mixture in a water bath with the temperature of 80 DEG C for one hour, and fermenting in an anaerobic envirnoment to produce the fatty acid. After the excess sludge is pretreated, dissolution of organic matters in the sludge is accelerated, and the activity of acid-consuming microbes of methanogenic bacteria and the like is sufficiently inhibited, so that acid yield is greatly improved, and the anaerobic fermentation time of the sludge is shortened; meanwhile, kinds and quantity of the pollutants in the sludge are reduced. The method provided by the invention is simple to operate and has important environment-friendly ecological significance for reduction, recycling and stabilization.

The invention provides a rice source ferment and a preparation method and application thereof. The preparation method mainly comprises the following steps that 1) bacillus subtilis, bacillus licheniformis, streptococcus thermophilus and lactobacillus acidophilus are mixed and inoculated into a seed medium to obtain a seed solution; 2) rice is smashed and then placed in a drying oven for hot baking; 3) the seed solution is inoculated into a fermentation medium and placed in a constant temperature incubator for culture to obtain a fermentation solution; 4) the smashed rice is added into the fermentation solution, protease is added, then culture continues to be carried out, fermented rice is obtained, and fermentation is stopped; 5) the fermented rice is taken out and cleaned with distilled water, xanthan gum or a sodium hyaluronate solution is added, stirring is carried out to form slurry, a grinder is used for grinding and smashing, then a drying machine is used for adjusting the watercontent, and rice source ferment powder is obtained. The prepared rice source ferment has the advantages of stable emulsifying performance, pleasant smell, excellent compatibility and the like.

The invention discloses nutritive salt and an application thereof to a method for producing long-chain binary acid through continuous fermentation. A solution containing nutritive salt comprises the following components of 0.0%-1.0% of glucose, 0.05-0.15% of corn steep liquor, 0.0%-0.3% of yeast cream, 0.005%-0.015% of potassium dihydrogen phosphate, 0.005%-0.015% of urea, 0.01%-0.15% of ammoniumsulphate and the balance water. The continuous fermentation method comprises the steps of performing fermentation for 100-150h, performing continuous flow feeding on substrates, and besides, performing continuous flow feeding on the solution containing nutritive salt. According to the nutritive salt solution disclosed by the invention, the acid production rate of long-chain binary acid can be increased by a fermentation method, and the acid yield can be substantially increased. According to the method disclosed by the invention, on the base that no equipment is additionally arranged, the long-term activity of thalli can be guaranteed, so that sustained production of the long-chain binary acid can be guaranteed, the yield of the long-chain binary acid can be substantially increased, and theyield is also increased.

The invention discloses lactobacillus sanfranciscensis Ls-1001 bread and a preparation method thereof. The bread is prepared from secondary fermentation dough and main dough by adopting a secondary fermentation method; the secondary fermentation dough comprises 110-130 grams of high protein flour, 0.3-0.4 gram of Angel high-activity dry yeast, 65-75 grams of water and 3-37 grams of lactobacillus sanfranciscensis Ls-1001 fermentation broth, wherein the number of bacterial colonies is 6.0*108-7.3*108 CFU/mL; the main dough comprises 70-90 grams of high protein flour, 0.7-1.6 grams of Angel high-activity dry yeast, 15-25 grams of water, 25-35 grams of white granulated sugar, 1.5-2.5 grams of salt, 18-25 grams of butter, 55-65 grams of egg and 8-15 grams of skim milk powder. The lactobacillussanfranciscensis Ls-1001 bread and the preparation method thereof have the advantage that the bread is delicate and soft in taste and moderate in sour and sweet by adding lactobacillus sanfranciscensis Ls-1001 with different bacterial counts.

The invention provides lactobacillus plantarum with fast acid production and high acid yield and an application of the lactobacillus plantarum. The lactobacillus plantarum is lactobacillus plantarum WG03, the preservation unit is China General Microbiological Culture Collection Center, the preservation number is CGMCC 20876, and the preservation date is October 12, 2020. The invention provides a microbial agent containing the lactobacillus plantarum. The lactobacillus plantarum or the microbial inoculum can be applied to silage fermentation. The lactobacillus plantarum with rapid acid production and high acid yield is obtained by combining a protoplast fusion technology with a traditional mutagenesis method, and the lactobacillus plantarum is used as a silage additive, so that the growth of spoilage bacteria can be well inhibited, the anaerobic fermentation process is quickly started, and the quality of silage is improved.

The invention relates to a biotin supplemented fermentation method for producing glutamic acid. The method comprises the following steps: treating biotin deficient strains as production strains, controlling the initial content of biotins in a fermentation culture medium, and supplementing penicillin and biotins in the fermentation process. The fermentation method which allows penicillin and biotins to be added in the middle and later fermentation process can overcome a biotin poorness problem in the later fermentation period of a suboptimal-dose technology, guarantees the sufficient biotins in the culture medium for the growth and the metabolism of thalli, and substantially improves the glutamic acid synthesis speed of the thalli; and compared with present glutamic acid suboptimal-dose technologies, the fermentation method provided by the invention allows the acid production rate of unit thalli to be improved by above 10%, the fermentation period to be substantially shortened and the production cost to be reduced.

The invention discloses a control method for microbial fermentation production of gluconate. A glucose acid high-producing strain is adopted as a starting strain, after seed culture, the strain is transferred into a fermentation tank to undergo fermentation production of gluconate. During fermentation, the fermentation tank air inflow rate and stirring speed can be adjusted automatically according to an on-line measured oxygen uptake rate (OUR). Thus, an enough dissolved oxygen concentration is guaranteed, the acid production rate is enhanced, and direct, real-time, and accurate control of a gluconate fermentation process can be realized.

The invention discloses activated calcium carbonate for increasing the acid production rate of fermentation organic acid and a preparation method of activated calcium carbonate. The preparation method of activated calcium carbonate comprises the following steps that in a fermentation liquor system, organic acid calcium salt reacts with matter containing carbonate and/or bicarbonate radicals, or reacts with matter capable of generating carbonate and/or bicarbonate radicals react, and activated calcium carbonate for increasing the acid production rate of the fermentation organic acid is generated. Particles of prepared activated calcium carbonate are spherical or fusiform, the particle size (D50) ranges from 1 micrometer to 20 micrometers, and the size of crystal nucleuses in the particles ranges from 10 nanometers to 200 nanometers; organonitrogen and polysaccharide matter are contained, activated calcium carbonate serves as an acidity and alkalinity modifier for fermenting organic acid, the acid production rate and the thallus concentration can be increased, and the preparation cost is low.

The invention provides a method for improving the acid production rate and conversion rate of butyric acid fermentation, and relates to the technical field of butyric acid fermentation. According to the method disclosed by the invention, a new ORP control standard is utilized; the ORP range standard of secondary seed culture is minus 400 to minus 200; and the ORP range standard of fermentation culture is minus 450 to minus 350. By utilization of the method disclosed by the invention, the period is shortened; the butyric acid content and conversion rate are improved; and compared with the priorart, the method improves the acid production rate by 9.9%.