37results about How to "High flocculation rate" patented technology

The invention discloses a method for producing a microbial flocculant by utilizing culture waste water and residual activated sludge. The method comprises the steps of: first implanting bacterial strains into a seed culture medium to culture a seed liquid; second, adding cane sugar (as a supplemented carbon source) and phosphate (for adjusting pH) in the culture wastewater to prepare a culture wastewater fermentation medium, and mixing the culture wastewater with pretreated residual activated sludge in a volume ratio of 1:5-1:8 to prepare a culture wastewater-residual activated sludge fermentation medium; and at last, inoculating a 1-2% seed liquid to the fermentation medium, and using a two-step fermentation technology for fermentation production of flocculant, thereby producing the microbial flocculant. The method of the invention utilizes culture wastewater rich in N, P and K and residual activated sludge rich in organic matters to produce microbial flocculant, so as to greatly reduce the production cost and realize comprehensive utilization of waste. The production method is simple and easy, and the produced microbial flocculant has high flocculation performance.

The invention provides a pond culture seawater micro-plastic purification method, and belongs to the technical field of environmental pollution research. The method comprises the following steps: rapidly stirring a culture water body for 5-6 minutes at a speed of 200-300r/min; adding an aluminum salt coagulant and 4-hydroxy-3-methoxybenzyl alcohol into water, slowly stirring at 100-120r/min for 3-5min, adding a microbial flocculant into the water, continuously and slowly stirring for 6-8min, standing for 20-30min, and carrying out solid-liquid separation to obtain the aluminum salt coagulant,namely PAC. According to the pond culture seawater micro-plastic purification method provided by the invention, the collision probability of PAC and colloidal particles can be increased; the electricneutralization effect is improved, the stretching of a molecular chain of the microbial flocculant can be promoted, the floc growth is accelerated, and the floc particle size is increased, so that thefloc structure is more compact, the floc strength is enhanced, and the purification effect of the micro-plastic is improved.

The invention provides a method for preparing high-purity electronic grade strontium carbonate. The method comprises the following steps: dissolving strontium chloride into deionized water; adding mixture of strontium hydroxide accounting for 3 to 5 percent of the strontium chloride by weight and microbial flocculating agent MBFA9 into the deionized water; filtering the solution and removing impurities of the solution to be prepared into a strontium chloride with water for standby; slowly flowing a sodium hydroxide solution into the strontium chloride solution to react; pumping obtained strontium hydroxide solution into a carbonization reactor, and introducing pure carbon dioxide into the reactor to be carbonized to obtain strontium carbonate pulp; and drying and crushing the strontium carbonate pulp to obtain strontium carbonate powder. Compared with the prior process for producing the strontium carbonate, the method not only saves investment of high-temperature calcination equipment in production, but also greatly reduces energy consumption and pollution to environment, simplifies and optimizes production process, shortens reaction time, and ensures that the prepared strontium carbonate powder has the advantages of good dispersivity, high purity and the like.

The invention discloses a compound oil paint flocculating agent where bacterial cellulose shell-core structures are added. The following steps including the first step of strain separation and purification, the second step of strain screening, the third step of strain fermentation and cultivation and the fourth step of compound magnetic microsphere preparation are included. The preparation process is simple, the compound oil paint flocculating agent can be suitable for industrialized large-scale production, can be repeatedly used and can reduce cost, the problems that the flocculating efficiency is poor and sediment sinks in circulating water are effectively solved, and the long-term effective safe operation of the circulating water is ensured.

The invention relates to an application of citrobacter rodentium for circularly preparing biological flocculants by using waste algae, and belongs to a method for treating algal blooms. The application of the citrobacter rodentium for circularly preparing the biological flocculants by using the waste algae comprises the following steps of performing fermental cultivation on the citrobacter rodentium to obtain fermentation liquor under the condition that the inoculation amount accounts for 0.5-2% of the total weight of a fermentation medium; centrifugally removing mycelium to obtain liquid supernatant; adding ethyl alcohol of which the volume of the ethyl alcohol is twice greater than that of the liquid supernatant and standing for 12 hours at the temperature of 4 DEG C; centrifuging mixed liquid and dissolving obtained 3-5g of sediments in 100ml of deionized water; adding 2% of cetyl pyridinium chloride with the volume of 50ml in the deionized water and vibrating for 3-4 hours; collecting sediments and dissolving the sediments in 0.5M of NaCl liquor with the volume of 100ml; adding ethyl alcohol of which the volume is twice greater than the NaCl liquor; centrifuging and collecting sediments; eluting the collected sediments by using the ethyl alcohol and dissolving the sediments in 5ml of deionized water; and performing vacuum drying to obtain a product. The application of the citrobacter rodentium for circularly preparing the biological flocculants by using the waste algae has the advantages that the production cost of the biological flocculants is greatly reduced, and secondary pollution cannot be caused; and the citrobacter rodentium is easily degraded by microorganisms, is non-poisonous and harmful, is high in safety, and is beneficial to application and popularization of the biological flocculants.

The invention belongs to the technical field of sewage treatment, and particularly relates to a microbial flocculant as well as a preparation method and application thereof in sewage treatment. The microbial flocculant comprises a Raoultella XN-1 microbial strain, and the strain can be used as a microbial flocculant to remove heavy metals in wastewater, especially heavy metals Cr <6+>; the strain can also be directly used for culturing bacterial liquid to be used as a microbial flocculant, is easy to culture, is high in yield and has a wide application range.

The invention discloses a fermentation method for increasing the yield of polysaccharide as an active ingredient of biological flocclants, which relates to a fermentation method for increasing the active ingredient of the biological flocclants. The method comprises the following steps of firstly, inoculating flocculant-producing microorganisms into a flocculant fermentation fluid medium for fermentation to prepare seed solution; then inoculating the seed solution into the flocculant fermentation fluid medium which is added with exogenous AHLs for secondary fermentation to prepare the biological flocclants, so that the fermentation for increasing the yield of the polysaccharide as the active ingredient of the biological flocclants is finished; wherein the exogenous AHLs is one of N-3-oxygen-decoyl homoserine lactone and N- caproyl homoserine lactone or is a mixture of the same at any ratio. By adopting the method disclosed by the invention, the addition of the exogenous AHLs can improve the concentration and flocculation activity of the polysaccharide as the active ingredient of the biological flocclants, the flocculation effect of the biological flocculants is improved, and a basis is laid for large-scale industrial fermentation of the biological flocculants.

The invention discloses an efficient compound water purifying agent and a preparation method thereof. The preparation method comprises the following steps: raw material pretreatment, seed powder degreasing, the crude extraction of flocculating active substances, the purification of the flocculating active substances, microbial flocculant preparation and compound water purifying agent preparation. The preparation method realizes the beneficial effects that raw materials are natural, a preparation process is simple and easy in implementation, added functional polypeptides can be used for enhancing the activity of moringa oleifera seed flocculating protein, the flocculation capability of the flocculating protein is enhanced, the flocculation rate of microbial flocculation and moringa oleifera seed flocculation active substance compound water purification is extremely high, the flocculation rate can be 95-98% when the use amount of the compound water purifying agent is 0.05-0.06g/L, and a finished product is safe and harmless compound water purifying agent product. In addition, the efficient compound water purifying agent is suitable for universal water bodies and has high economic value and environment protection value.

The invention relates to a circulating slurry-water separation system for seabed ore collection. At least one vertical shaft is arranged below a hollow cavity, the rear side of the vertical shaft is provided with a vertical shaft outlet for ore to flow out, and the lower surface of the vertical shaft outlet is inclined downwards; a porous baffle inclining downwards is arranged in the vertical shaft and connected with the lower surface of the vertical shaft outlet, and the inclination trend is the same as that of the lower surface of the vertical shaft outlet; a vertical shaft inlet is formed in the bottom of the vertical shaft, is a low-speed water flow inlet and is connected with an outlet of a slurry-water separator through a flow-adjustable valve; and an outlet of a slurry separator isconnected with an inlet of the slurry-water separator through a submersible pump, and an outlet of the slurry-water separator is also connected with an inlet of an ore collecting head. According to the system, minerals, sea mud and water can be thoroughly separated, rapid sedimentation of the sea mud can also be achieved, the influence on the seabed environment is effectively reduced, meanwhile, the residual energy of water flow is utilized, and the separation rate of a slurry-water mixture is further increased.

The invention relates to the technical field of sewage treatment, in particular to a high-efficiency flocculating bacterium and application thereof in sewage treatment, and the flocculating bacterium is pseudomonas guguanensis, is named as Peseomonas guguanensis 2021XNI14, and is preserved in the China Center for Type Culture Collection (CCTCC). The flocculating bacterium can be used for preparing a microbial flocculant, is used for treating aquaculture sewage, village sewage, domestic sewage and industrial sewage, and has the advantages of high efficiency, high nitrogen removal rate and high flocculation rate. The flocculating bacterium is easy to screen, high in culture yield and easy to be used for preparing a microbial flocculant, and has a wide application prospect in the sewage treatment industry.