438results about How to "Improve sedimentation efficiency" patented technology

A method for the removal and sequestration of ammonia nitrogen from anaerobic fermentation effluent while producing a higher BTU biogas. The method includes the steps of removing the slurry from the digester, stripping the ammonia from the slurry or portion thereof with a high BTU biogas, blending the stripped ammonia with the digesters biogas to remove the carbon dioxide and precipitate ammonium bicarbonate/carbonate as a solid while producing a high Btu biogas, a portion of which is used to strip the ammonia and CO₂ from the slurry. The process removes ammonia nitrogen from the digester effluent while producing a high Btu biogas and a solid ammonium bicarbonate/carbonate product. Ammonia stripping is accomplished with a recycled stripping gas deficient in CO₂ and ammonia that is capable of removing the CO₂ and ammonia from solution by virtue of the lower partial pressures of CO₂ and ammonia in the stripping unit.

The invention discloses a small-sized rapid-precipitation environment-friendly sewage treatment device, which comprises a sedimentation tank, a driving motor and a filter tank; A brush plate; a drive shaft is provided under the filter plate, and spiral blades in opposite directions are provided on the left and right sides of the drive shaft. The present invention is equipped with reverse spiral blades and trapezoidal material guide plates to horizontally stir and mix the sewage and flocculants, so that the flocculants can be rapidly diffused and mixed, improving the efficiency of flocculation and sedimentation, and at the same time reducing the impact on the settled sludge. Stir to improve the efficiency of sedimentation; the present invention is provided with a reciprocating brush to avoid clogging of the filter holes and ensure normal filtering; the present invention is provided with a filter plate, a sandstone packing plate and an activated carbon packing plate that are easy to disassemble, and has better Excellent purification effect, easy to disassemble and clean.

The invention relates to a synthetic method and the application of a macromolecule chelating agent with polyvinyl alcohol as a fundamental chain. The hydroxyl is used in a polyvinyl alcohol structure unit to react with halogenating alkylene oxide under the acid condition to produce etherified polyvinyl alcohol, and then is reacted with organic amine under the alkaline condition, and then the amido polyvinyl alcohol ramification is obtained through the crosslinking and of chain increasing halogenating alkylene oxide or dihaloalkane or epoxy resin. The amido polyvinyl alcohol ramification has reaction with carbon bisulfide under the alkaline condition to produce a macromolecule chelating agent having good absorption property to heavy-metal ion. The polyvinyl alcohol which is macromolecule is used, and the polyvinyl alcohol has a plurality of hydroxyl as the fundamental chain in order to increase the product molecular weight and the effective group content, thereby improving the collecting efficiency and the precipitation effect to the heavy-metal ion. The macromolecule chelating agent of the invention deals with the heavy-metal ion in various waste liquor, thereby having high collecting efficiency, complete eliminating, bulky and compact garrulous body, rapid sinking, etc.

The invention discloses a heavy metal precipitator. It conquers the disadvantages of low utilization factor of raw material, and weak complexation ability, incompact wadding and slow speed to deposit existed in the heavy metal precipitator in existing.Especially for the stability complexation heavy metal ion wasting water, it can remove stability heavy metal ion. Moreover, it has decolor function and can be used in the process for heavy metal ion.

The invention provides a catalytic oxidation-compound flocculation integrated treatment process which aims to solve the problem that organic comprehensive waste water is difficult to treat because the organic comprehensive waste water contains organic substances difficult to biologically degrade. The treatment process integrates catalytic oxidation, Fenton oxidation, compound flocculation, high-efficiency precipitation and other technical advantages; a high-efficiency catalyst is used to improve the treatment efficiency or biodegradability; and a compound flocculant is used as the core to simplify the treatment process and ensure the stable treatment effect, thereby achieving the catalytic oxidation-compound flocculation integration. The invention has the characteristics of concise technical line, high treatment efficiency and simple operation process.

The invention discloses a method for treating reverse osmosis concentrate. The method comprises the step of sequentially carrying out crystallization and membrane distillation on the reverse osmosis concentrate. The method is carried out at a normal pressure and a low temperature, and has the characteristics of simplicity in operation and convenience in management. The concentration of scaling ions in the reverse osmosis concentrate is reduced through induced crystallization softening, the membrane distillation concentration process can be carried out under the condition of lower membrane pollution, high-quality industrial pure water is obtained when the reverse osmosis concentrate is greatly reduced, and can be recycled in industrial production, thus the problem of treating the reverse osmosis concentrate is successfully solved, and a wide application prospect is achieved.

The invention discloses a repair method of chromium-contaminated soil, which belongs to the technical field of environment engineering. The method comprises the following steps: reducing hexavalent chromium in the chromium-contaminated soil, removing trivalent chromium and performing sewage treatment. Ferrous sulfate is added into the chromium-contaminated soil, and the reaction environment is adjusted, so that the efficiency for reducing the hexavalent chromium in the chromium-contaminated soil into the trivalent chromium is improved, and conditions are provided for removing chromium; chromium in the soil is extracted by adopting disodium ethylenediamine tetraacetate, the removal rate of the chromium in the soil is increased by adopting microwave heating, and the reaction time is shortened; sodium sulphide is added into chromium sewage, and the reaction environment is adjusted, so that the settling efficiency of heavy metals in the sewage is improved; and additionally, the sewage is converted into disodium ethylenediamine tetraacetate solution, so that resource recovery and utilization are realized. According to the method, the hexavalent chromium is converted into the trivalent chromium to be treated, so that the environmental risk in the repair process is reduced; the chromium-contaminated soil is converted into chromium sewage for treatment, so that the treatment efficiency is improved, and the treatment effect is guaranteed; and the method has the characteristics of no secondary pollution, high efficiency, rapidity, high resource utilization rate and the like.

The invention discloses a wastewater sludge recovery treatment device. The device comprises a base and a sludge recovery bin, wherein the sludge recovery bin is fixed to the base through a supportingcolumn, a sewage inlet pipe is connected with one side wall of the sludge recovery bin, a first driving motor is fixed to the center part of the top of the sludge recovery bin through bolts, a stirring shaft is rotatably connected with the bottom of the first driving motor, a filtering cover is fixed to the interior of the sludge recovery bin, water outlet pipes are connected with the outer surface wall of the bottom of the sludge recovery bin, and a first sludge discharging pipe is connected with the center part of the bottom of the filtering cover. In the wastewater sludge recovery treatmentdevice, the sludge recovery bin, a dehydration box and a second sludge discharging pipe which is provided with electric heating pipes and used for drying are arranged, thus sludge in wastewater can be directly recovered, dehydrated and dried, the integration level is high, functions are complete, use is convenient, the sludge subjected to recovery treatment can be directly transferred, and duringtransferring, no sewage percolates, so that the environment is protected.

The invention provides a sewage filter, which synthesizes a shallow tank theory, a dynamic coagulation theory, an accelerated coagulation theory and an inclined plate technology, effectively solves the problem of easiness in blockage of the traditional inclined plate. The sewage filter is used for subdividing raw motion water through by using filter masks and a plurality of through hole structures; and the raw water forms stable eddies at rear edges of plate holes of filter mask bodies. Under the entrainment action of the eddies, non-fluidic substances in the raw water are collected at centers of the eddies and get in continuous contact and collision with one another in eddy cores to undergo a flocculation reaction, and slides down along the mask bodies under the gravity action to settle into a mud collecting hopper, so that the purposes of removing suspended substances in the raw water and cleaning a water body are achieved. The sewage filter can rotate around an axis of a rotating shaft; and a strongly turbulent shear flow is formed through left and right repeated quick rotation to scour an inclined plate at a high speed and to clean deposits and blockages very conveniently.

The invention discloses a river channel segmental desilting construction method, and belongs to the technical field of river channel regulation. According to the river channel segmental desilting construction method, a river channel is segmented, flexible dams are constructed respectively, silt deposition ditches are excavated in front of dam bodies, and silt at the bottom of the river channel is treated by using the water head difference generated after dam construction and water flow impact force generated after water gates are opened for drawing off water. The structural form of the self-floating type dam bodies is adopted in the river channel segmental desilting construction method, the flexible dams can descend automatically according to variations of the river water level, then segmental treatment is conducted, and therefore deposition conditions of the silt can be improved easily; the drainage gates are used in cooperation with the segmental silt deposition ditches, so that the silt deposition efficiency is improved while the water is drained; net-shaped cover plates are arranged above the silt deposition ditches to be used for shielding impurities and protecting personal security; inorganic composite agents are added for conducting innocent treatment on the silt, so that secondary pollution is prevented from being caused to the environment in the process of recycling the soil body; water drainage and solidification of the silt are accelerated, so that the treatment efficiency of the silt is improved.

The invention provides a coagulation sedimentation method for advanced treatment of printing and dyeing wastewater, which belongs to the field of organic wastewater advanced treatment. After the biochemical treatment, the printing and dyeing wastewater flows into a coagulation sedimentation tank where the wastewater is thoroughly mixed with the coagulant agent and the sludge in the mixing region and then the mixture undergoes the coagulation sedimentation in the coagulation region; the sludge is returned after the coagulation sedimentation and mixing; the wastewater, the coagulant agent and the returned sludge are subjected to the mixed treatment; and the effluent is collected and then discharged. The coagulation sedimentation method enhances the effect of coagulation sedimentation treatment, reduces the consumption of coagulant agent and increase the coagulation sedimentation efficiency. The water quality of the effluent is significantly better than that of the effluent from the coagulation sedimentation free of return tank, and the sedimentation efficiency is also improved. The biochemical tail water of the printing and dyeing wastewater after the coagulation sedimentation treatment has high water quality of the effluent, meets the national discharge standard of pollutants, and has high economic, social and environmental benefits.

The invention discloses intensive integrated water purification equipment. The equipment is separated into five sections according to difference of water purification units, and the five sections are connected through flanges; and the equipment is provided with a mud collecting area, a primary flocculation area, an inner-cylinder clustering flocculation area/and an outer-cylinder sludge concentration area, a sludge separation area, an inclined tube sedimentation area, a backwashing gas distribution area, a filtration area, and a clear water area from bottom to top. The equipment is provided with devices such as an agitator blade used for particles to form agglomerated floc, a rotary gas distribution plate used for gas-water backwashing of a filter material, small-space spiral sloping panels used for concentrating sludge and the like; and the whole equipment is simple in structure, water purification functional units are compactly connected, the flat plane utilization rate is high, and the equipment is convenient to operate, can maximize the water purification function, and has important practical significance for medium and small water supply systems.

The invention relates to an oil refining catalyst wastewater zero-discharging treatment method. The oil refining catalyst wastewater zero-discharging treatment method comprises the following steps that (1) oil refining catalyst wastewater is treated in a high-density sedimentation tank to obtain sedimentation wastewater; (2) the sedimentation wastewater is fed into a multi-media filter to obtain produced water of the multi-media filter; (3) the produced water of the multi-media filter is fed into an ultra-filtration system and is further treated to obtain ultra-filtration water; (4) the ultra-filtration water is regulated to be weak-acidic and then is fed into a sea water desalination type reverse-osmosis system, and reverse-osmosis concentrated water is obtained through treatment; (5) the reverse-osmosis concentrated water is fed into an efficient electrodialysis system for concentration or into a conventional reverse-osmosis system for reverse osmosis respectively according to the salt content of the reverse-osmosis concentrated water; (6) the electrodialytic concentrated water is fed into a mechanical vapor compression (MVR) evaporator for concentration, the concentrated liquid is fed into a waste heat multiple-effect evaporative crystallization system, further evaporative concentration and crystallization are conducted on the concentrated wastewater, centrifugal dewatering is conducted on the concentrated liquid to obtain solid salt for recycling, and the produced water is reused. The oil refining catalyst wastewater zero-discharging treatment method is obvious in treatment effect and low in operation cost.

The invention discloses a water coagulation treatment method. The method comprises that: a coagulating agent is adopted to carry out coagulation treatment on water; and in the process of water coagulation treatment, a catalyst and an oxidant are thrown into the water. Through the addition of the catalyst and the oxidant in the process of the water coagulation treatment, the catalyst forms a solid-liquid reaction interface in the water; and the oxidant undergoes rapid oxidation reaction on the interface and oxides organisms to destroy the protective function of the organisms on suspended particles. The adsorptive action of the catalyst can combine with colloid particles in the water to form a microfloc nucleus so as to increase the concentration of particles in the water and be favorable for the formation and growth of floc in the coagulation reaction.

The invention provides a method for separating enriched palladium from a waste Pd/Al2O3 catalyst chloride leaching solution. The method mainly comprises the steps of adjusting pH in advance, performing sulfide precipitation, and acidizing to remove impurities. A waste Pd/Al2O3 catalyst is chloridized and dissolved so as to obtain a leaching solution, firstly, a NaOH solution is added, so that Al<3+> in the leaching solution exists in forms of meta-aluminic acid radical ions, other alkali metal ions are precipitated in the form of hydroxide, then a Na2S solution is added, so that [PdCl4]<2> in the leaching solution is converted into PdS, and finally, hydrochloric acid is added, so that the hydroxide is dissolved, and palladium sulfide is effectively separated from alkali metal impurities. The palladium recovery rate reaches 100%, and the purity is more than 95%. The method has the advantages of good selectivity, simplicity in operation, high enrichment efficiency, economy and environmental friendliness, toxic gas H2S cannot be generated, additionally, aluminum and palladium can be recycled, and the method is suitable for mass production.

The invention relates to a sulfate reducing bacterium capable of achieving heavy metal settling and an application of the sulfate reducing bacterium. The sulfate reducing bacterium is separated from a paddy field. The sulfate reducing bacterium is collected in China Center for Type Culture Collection on April 19, 2015, with a collection number of CCTCC NO (China Center for Type Culture Collection number): M2015243 and a name of the sulfate reducing bacterium SRB-L (desulfovibrio sp. SRB-L). The bacterium has good heavy metal settleability and can be used for removing heavy metal ions from soil and waste water.

The invention relates to a method and a device for treating oil and gas field fracturing flow-back fluid by adopting ceramic membrane, and belongs to the technical field of water treatment. The method comprises the following steps: first, conducting gel breaking flocculation treatment on the gel-containing fracturing flow-back fluid; carrying out an ozonation process to reduce the viscosity of the fracturing flow-back fluid; carrying out fine filtration according to a ceramic membrane filter technology. The method has the advantages that not only can the flux of the ceramic membrane and the operational stability be improved, but also the treating time and the technological process are shortened, and the treating cost of the fracturing flow-back fluid is reduced.

The invention discloses an efficient sewage sedimentation tank, comprising a sedimentation tank body; pi-shaped fixed bases are fixed on the side wall of the sedimentation tank body in an inserting sleeving way; T-shaped guide rail grooves are respectively formed in the two side walls of each fixed base; a vertical T-shaped guide rail is inserted and connected in the each guide rail groove of thecorresponding fixed base; a connecting block is fixed between the two T-shaped guide rails on each fixed base; the connecting blocks are distributed at the upper sides of the fixed bases; support lugsare respectively molded at the bottom ends of the T-shaped guide rails arranged at the inner side of the sedimentation tank body; a horizontal porous plate is inserted and connected in the sedimentation tank body; a plurality of hinge joint seats are molded at one side of the porous plate; the hinge joint seats arranged on the porous plate are hinged with the support lugs of the T-shaped guide rails by means of hinge joint shafts; a plurality of support seats are fixed on the porous plate; a horizontal first transmission shaft is hinged on the connecting blocks of the T-shaped guide rails; coiling wheels are fixed on the first transmission shaft in an inserting sleeve way; one ends of rope belts are fixed on the support seats, and the other ends of the rope belts are fixed on the coilingwheels; the two ends of the first transmission shaft are respectively and fixedly connected with a rotating shaft of a coiling motor by means of a coupling. The efficient sewage sedimentation tank canaccelerate the sedimentation speed, so that the sedimentation efficiency of the sedimentation tank is increased.