32results about How to "Short flocculation time" patented technology

The invention discloses a magnetic flocculant with aluminum salt loaded with ferroferric oxide. The magnetic flocculant is prepared by loading ferroferric oxide nanoparticles on aluminum salt. The invention further discloses a preparation method of the magnetic flocculant. The preparation method comprises the following steps: S1, adding aluminum salt and water into a reactor, and stirring till the aluminum salt is dissolved and sufficiently mixed; S2, adding NaOH, performing high-temperature polymerization reaction, and transferring a reaction solution into an ultrasonic cleaning machine; S3, adding ferroferric oxide nanoparticles into hydrochloric acid for acidizing treatment, filtering, adding into the ultrasonic cleaning machine of the step S2, performing ultrasonic treatment, and performing standing to age, thereby obtaining the magnetic flocculant. The magnetic flocculant disclosed by the invention has the advantages of being small in addition amount, short in flocculation time, good in flocculation property, small in pH value and temperature influence and the like as compared with a conventional flocculant, not only is a relatively large specific surface area maintained, but also a relatively good adsorption property is achieved, and the magnetic flocculant can be effectively separated and recycled after being used.

The invention discloses a compound multiple-effect sewage treatment flocculant and a preparation method thereof. The compound multiple-effect sewage treatment flocculant comprises the following raw materials in parts by weight: 80-90 parts of lignin, 25-30 parts of normal hexane, 25-30 parts of cyclohexane, 50-70 parts of propionic aldehyde, 100-120 parts of absolute ethyl alcohol, 30-50 parts of acrylamide, 20-30 parts of triethylenetetramine, 30-32 parts of sodium formaldehyde bisulfite, 4-6 parts of glycerol monostearate, 400-420 parts of isopropanol, 8-12 parts of methacryloyloxyethyl trimethyl ammonium chloride, 8-12 parts of acrylamido propyl trimethyl ammonium chloride, 10-14 parts of polymeric aluminum ferric sulfate, 8-12 parts of polymeric phosphate ferric chloride, 2-6 parts of poly aluminum chloride, 18-22 parts of sodium polyacrylate, 1-3 parts of sodium bisulfite, 2-4 parts of sodium hypophosphite, 10-12 parts of active carbon, 10-12 parts of raw gypsum and 280-320 parts of water.

The present invention relates to a treatment method for alcohol-containing wastewater, in particular to a treatment method for alcohol-containing wastewater produced after deicing of an airport by a deicing fluid. Before a film is adopted to carry out separation treatment on the alcohol-containing wastewater, a flocculant is used to carry out flocculation and precipitation pretreatment on the alcohol-containing wastewater, wherein the flocculant is composed of an inorganic polymeric flocculant, an aqueous solution of which is acidic, and an organic polymeric flocculant, an aqueous solution of which is alkaline. According to the treatment method for the alcohol-containing wastewater, impurity contamination caused by pH value adjustment in an alcohol-containing wastewater flocculation treatment process is reduced; the flocculation effect is good; film separation equipment is maintained to operate stably at a high utilization rate, and the flocculant can be recycled.

The invention provides a composite flocculant for refinery wastewater treatment, and a refinery wastewater treatment method. The composite flocculant for refinery wastewater treatment is prepared fromthe following components in parts by weight: 8-15 parts of an aluminum salt, 6-10 parts of a zinc salt, 0.02-0.05 part of an organic flocculant, 3-4 parts of an organic complexing agent, 70-85 partsof water and an inorganic strong acid, wherein the concentration of the inorganic strong acid in the composite flocculant is 0.025-0.085 mol / 100 g. The composite flocculant for refinery wastewater treatment provided by the invention solves the problem of loose floc of a single organic flocculant, and has the advantages of high flocculation efficiency, large and compact floc, small addition amount,low cost and the like when being used for treating refinery wastewater.

The invention discloses a method for preparing sewage flocculation sedimentation agent, soil curing agent and foam concrete by using red mud, gangue and / or fly ash. Red mud, gangue and / or fly ash should be taken in parts by weight and mixed together firstly. Then the method comprises three technical steps of: (a) adding solid sodium silicate powder into a part of the mixed powder material to obtain the sewage flocculation sedimentation agent; (b) adding solid sodium silicate powder and calcium lignosulphonate powder into a part of the mixed powder material to obtain the soil curing agent; (c)adding regeneration machine-made sand and / or regeneration machine-made bone grain, water, additive and alkali resistant fiber to a part of the mixed powder material to obtain the foam concrete. By the method in the invention, the target of being harmless, material-saving, stable and recyclable in the whole environment friendly process is realized. At the same time, the ultimate goal of zero release, high utilization ratio, high additional value and industrial production is achieved, and an industry chain and an industry group are formed by using multi-disciplinary technology in various fieldsto recycle and utilize the waste for waste treatment.

The invention relates to an algae setting material, which comprises 5 to 70 percent of natural fiber material and 30 to 95 percent of natural high polymer material, wherein, the natural fiber material is selected from plant fiber and / or animal fiber, and the natural high polymer material is selected from crab derivatives and / or shrimp derivatives and plant viscous juice with a proportion no less than 5 percent. The algae setting material is the natural substance without any harm to human bodies, livestock, environment as well as aquatic animals and plants, and has coagulation, adsorption, tangling and enmeshing function for the algae. When the use amount of the algae material is 0.1 to 10mg / L, the removal efficiency of the algae is over 95 percent. The obtained algae setting body of the flocculation has strong holding power, good performance of floating and drainability, little algae mug and convenient post-process, so the invention is applicable to urgent treatment of burst red tide in ease water and water bloom in fresh water.

The invention belongs to the field of the microbial technology, relates to a method for preparing a biological flocculant by enterobacter gergoviae and enterobacter gergoviae use, and especially relates to enterobacter gergoviae and its use in preparation of the biological flocculant. The preparation method of the biological flocculant comprises the following steps of inoculating a sterile strain medium with enterobacter gergoviae, carrying out culture, collecting the culture solution, inoculating a fermentation medium with the culture solution, carrying out culture at a temperature of 30 DEG C for 18h, carrying out fermentation broth centrifugal separation, and removing a supernatant and precipitates to obtain the biological flocculant. The preparation method has simple processes and a low cost. The biological flocculant has the advantages of high activity, strong heat resistance, good pH tolerance and no secondary pollution, can improve sludge settlement in sewage treatment, and has a flocculation rate of 90% and a good application prospect.

The invention discloses a fiber radical sewage decoloration and purification material which is characterized by comprising a component (I) and a component (II). The component (II) occupies 5%-10% of the total mass. The component (1) is a product obtained by reaction of 36% formaldehyde solutions, dicyandiamide, ammonium chloride and property-modifying additives A, wherein the mass ratios of the 36% formaldehyde solutions, the dicyandiamide, the ammonium chloride and the property-modifying additives A are sequentially 1.0-1.3:0.50-0.65:0.60-0.70:0.06-0.09. The property-modifying additives A are a mixture obtained by mixing magnesium sulfate and magnesium chloride according to a proportion, wherein the mass ratio of the magnesium sulfate and the magnesium chloride is 2.0-3.5:8.0-6.5. The component (II) is a natural fiber (plant and / or animal) which is modified by cation modifiers. The fiber radical sewage decoloration and purification material integrates multiple functions such as decoloration, flocculation, entanglement and COD removing. The decoloration ratio of sewage can reach more than 93%, the COD value removing rate is higher than that of the prior art by more than 10%, reclaimed water reusing can be achieved, and sewage discharging is reduced.

The invention discloses a method for preparing stevia polyphenols by using a composite chitosan flocculation method, and belongs to the technical field of plant extraction. In the present invention, the water extract of stevia leaf is flocculated and removed with composite chitosan at room temperature, and the supernatant is adsorbed with a macroporous polar resin; the effluent is used to further extract steviol glycosides; the resin is eluted with alcohol aqueous solutions of different concentrations , after elution with low-concentration alcohol aqueous solution, the obtained analysis solution is combined with the effluent before analysis to obtain a combined solution, the total phenol content in the combined solution is less than 0.5% (on a dry basis), and the combined solution is retained for extracting steviol glycosides. The eluate after elution with high-concentration alcohol aqueous solution is dried to obtain stevia polyphenols mainly composed of isochlorogenic acid. The invention realizes the simultaneous production of stevia polyphenols with high isochlorogenic acid on the basis of the original steviol glycoside production process, realizes the comprehensive utilization of stevia, and improves the economic benefits of enterprises.

A ladder tower flocculation reaction device comprises a stand tower structure, a vertical partitioning plate and a lower end trumpet-shaped expanding opening. A stand tower comprises oval step plates and pulling ribs. The trumpet-shaped expanding opening is formed in the lower end of the tower. 2-5 circles of circular or oval step table plates are horizontally arranged at the lower end of the tower from top to bottom with the sizes gradually reduced. The pulling ribs are used for connecting the table plates. A plurality of supporting partitioning plates are arranged in the vertical direction perpendicular to the ladder table plates. A cross-shaped turbulent flow partitioning plate is horizontally arranged in the middle of the tower. The step plates and the pulling ribs shaped like a Chinese character 'mi' are connected in a welding or bolt mode, and the supporting partitioning plates and the step plates are connected in a welding or bolt mode. Ladder tower flocculation equipment has the advantages of being good in corrosion resistance, high in intensity, attractive in appearance, convenient to mount, good in flocculation effect, low in head loss, short in flocculation time and the like. The ladder tower flocculation reaction device can generate high-frequency-spectrum vortex, flocculation particle contacting and colliding frequency is improved, and effective collision rate of particles in water is improved.

The invention provides a method for preserving Isochrysis globosa, which belongs to the technical field of microalgae cultivation. The method comprises the following steps: 1) Cultivating Isochrysis globosa with an f / 2 medium containing a mixed antifreeze agent. Obtaining Isochrysis globosa culture medium in the logarithmic growth phase; 2) Adding ferric chloride to the Isochrysis globosa culture fluid described in step 1) for flocculation to obtain flocculated Isochrysis globosa cells; 3) The flocculated Isochrysis globosa cells are collected, freeze-dried, and sealed for storage; the mixed antifreeze agent in step 1) includes dimethyl sulfoxide and methanol. Using the method of the present invention to preserve Isochrysis globosa, after one year of storage at room temperature, the survival rate of the Isochrysis globosa cells can reach 92%, which is far greater than the cell survival rate of conventional preservation methods.

Belonging to the technical field of waste treatment, the invention in particular relates to a purification process for coal fired power plant desulphurization sewage. The method comprises the steps of: 1. adjusting the pH value to alkaline; 2. adding a chelating agent and fully stirring the materials till no generation of floc; 3. adding inorganic high molecular polymer magnetic powder, and fully stirring the materials; 4. adding an organic high molecular polymer, and fully stirring the materials; 5. conducting solid-liquid separation until all the flocs settle, and discharging the lower sediment; and 6. adjusting the pH value to neutral. The process provided by the invention adopts simple system and steps to completely and effectively remove the neutral salt, suspended solids, fluorides, sulfides, heavy metal ions and other harmful pollutants from the sewage, and has the characteristics of low cost and simple operation, etc.

A ladder tower flocculation reaction device comprises a stand tower structure, a vertical partitioning plate and a lower end trumpet-shaped expanding opening. A stand tower comprises oval step plates and pulling ribs. The trumpet-shaped expanding opening is formed in the lower end of the tower. 2-5 circles of circular or oval step table plates are horizontally arranged at the lower end of the tower from top to bottom with the sizes gradually reduced. The pulling ribs are used for connecting the table plates. A plurality of supporting partitioning plates are arranged in the vertical direction perpendicular to the ladder table plates. A cross-shaped turbulent flow partitioning plate is horizontally arranged in the middle of the tower. The step plates and the pulling ribs shaped like a Chinese character 'mi' are connected in a welding or bolt mode, and the supporting partitioning plates and the step plates are connected in a welding or bolt mode. Ladder tower flocculation equipment has the advantages of being good in corrosion resistance, high in intensity, attractive in appearance, convenient to mount, good in flocculation effect, low in head loss, short in flocculation time and the like. The ladder tower flocculation reaction device can generate high-frequency-spectrum vortex, flocculation particle contacting and colliding frequency is improved, and effective collision rate of particles in water is improved.

The present invention relates to a treatment method for alcohol-containing wastewater, in particular to a treatment method for alcohol-containing wastewater produced after deicing of an airport by a deicing fluid. Before a film is adopted to carry out separation treatment on the alcohol-containing wastewater, a flocculant is used to carry out flocculation and precipitation pretreatment on the alcohol-containing wastewater, wherein the flocculant is composed of an inorganic polymeric flocculant, an aqueous solution of which is acidic, and an organic polymeric flocculant, an aqueous solution of which is alkaline. According to the treatment method for the alcohol-containing wastewater, impurity contamination caused by pH value adjustment in an alcohol-containing wastewater flocculation treatment process is reduced; the flocculation effect is good; film separation equipment is maintained to operate stably at a high utilization rate, and the flocculant can be recycled.

The invention relates to a device and a method for integrally processing garbage percolate, wherein the device comprises a denitrification mechanism, a polymerizing reaction tank, a sloping plate / pipe sedimentation tank, a biochar filter bed, an SMBR reactor and a medicine dissolving and dispensing mechanism, wherein the medicine dissolving and dispensing mechanism comprises three parallel medicine dissolving tanks including an alkali liquor tank, a flocculation liquid medicine tank and a flocculation aid liquid medicine tank; the three medicine dissolving tanks are respectively communicated with an alkali liquor medicine adding hole on a liquid inlet pipe of a stripping tower and a flocculation medicine adding hole and a flocculation aid medicine adding hole of pipelines communicated with a denitrification settling water tank and the polymerizing reaction tank. The treatment method comprises ammonia nitrogen stripping, coagulating sedimentation, biochar filter bed treatment, SMBR reactor treatment, nanofiltration and / or reverse osmosis treatment. The device and the method consist of a high-efficiency ammonia nitrogen stripping tower, whirl grid coagulation, sloping plate (pipe) setting, the biochar filter bed and the SMBR reactor, integrates the advantages of a garbage percolate treatment process and solves the problem of difficult treatment and high expense of the garbage percolate. The high-efficiency ammonia nitrogen stripping tower has high utilization rate on gases, a new gas distribution structure improves the energy efficiency, and the invention has the advantages of reducing the occupied area and reducing the operation expense.