1012results about How to "Improve precipitation effect" patented technology

A method for producing nanoparticles is characterized in that two processing surfaces capable of approaching each other and separating from each other and rotating relative to each other are held with a small gap of 1 mm or less, that the space between the surfaces is used as a passage for a fluid under processing, and that a forced thin film of the fluid is formed and nanoparticles are precipitated in the forced thin film.

The invention discloses an external water interception and purification type urban river multi-element ecological embankment physical structural system. The urban river multi-element ecological embankment physical structural system comprises a first-class platform ecological embankment physical structural system, a second-class platform ecological embankment physical structural system and a slope ecological embankment physical structural system which are organically combined on a river bank slope, wherein the first-class platform ecological embankment physical structural system is provided with an urban surface source sewage runoff collecting groove, a groove type ecological concrete building block, a vertical first-class retaining wall and the like; the second-class platform ecological embankment physical structural system is provided with a sedimentation and purification tank, a current restriction baffle and the like; and the slope ecological embankment physical structural system is provided with a bedding, iconological concrete, a plant growth pad and the like. The urban river multi-element ecological embankment physical structural system effectively integrates water treatment functions such as rainfall surface source collection and purification, discharge port sewage interception and purification, physical absorption and filtration and plant absorption and purification on the premise that the stability and safety of bank slopes are maintained, ecological environments and landscapes of urban riparian zones are improved, and the self cleaning capacity of rivers is well played.

The invention discloses a method for processing the surface of an attachment-resisting plate. The method comprises the following steps: providing an attachment-resisting plate with a smooth surface; patterning the attachment-resisting surface of the attachment-resisting plate with a smooth surface to form an uneven attachment-resisting surface; blasting the attachment-resisting surface; and meltallizing the attachment-resisting surface after blasting. The smooth surface of the attachment-resisting plate is subject to the patterning, the blasting and the meltallizing so that the surface of theattachment-resisting plate has corrosion resistance, rust prevention, abrasion resistance, lubrication, roughness, adsorption, insulation, heat insulation and other properties; the attachment-resisting surface of the attachment-resisting plate achieves even roughness; and the attachment-resisting plate can easily absorb target atoms or large-sized particles so that the target atoms or large-sizedparticles do not fall on a substrate, thereby increasing the sediment capability of the attachment-resisting plate, improving the cleanness of the inner wall of a sputtering machine, improving the filming rate of sputtering and prolonging the service life of the attachment-resisting plate.

The invention discloses a peaty soft soil stratum subway station construction technology. A main structure of a constructed subway station comprises base plates, side walls, top plates and middle plates distributed between the top plates and the base plates. Underground consecutive walls are arranged on outer sides of the two side walls. The base plates, the side walls, the middle plates and the top plates are all of a rebar concrete structure formed by pouring waterproof concrete. The subway station construction technology comprises the following steps: (1) underground consecutive wall construction, (2) foundation reinforcement, namely, three-shaft stirring piles are used for reinforcing the foundation of excavated foundation pits, (3) vacuum water falling, namely conducting vacuum well point water falling construction on the foundation pits needing excavating, (4) foundation pit excavation, namely, an open excavation method is used for conducting earthwork excavation on the foundation pits needing excavating with a plurality of excavating layers from top to bottom, (5) subway station main structure construction. The method is simple, convenient to realize, quick in construction speed, capable of being ensured in construction quality easily, and good in construction effect, and enables the subway station construction process of peaty soft soil stratum to be completed simply, quickly and with high quality.

The invention relates to the technical field of sewage treatment and particularly relates to an A3 / O-MBBR (Moving Bed Biofilm Reactor) integrated sewage treatment device and an A3 / O-MBBR integrated sewage treatment method. According to the device provided by the invention, a sewage backflow mechanism, a nitrification liquor backflow mechanism and an anaerobic liquor backflow mechanism are arranged and suspended filler is filled in an aerobic tank, so that the integrated sewage treatment device has a good effect for treating nitrogen and phosphorus in sewage and is high in treatment efficiency, compact in structure and small in occupied area. In addition, by virtue of optimizing a settling pond structure in the integrated sewage treatment device, the settling effect of the settling pond is improved, and the sludge floatation phenomenon and the content of suspended solids in effluent can be remarkably reduced. After sewage is treated by the integrated sewage treatment device provided by the invention, the effluent can reach the level A of first class stand of pollution discharge standard for municipal sewage treatment plant (GB18918-2002).

The invention relates to a rapid start method for an integrated autotrophic denitrification system and belongs to the technical field of treatment of sewage with high ammonia nitrogen. An SBR (Sequencing Batch Reactor) is inoculated with short-cut nitrification sludge and anammox sludge according to the mass ratio of (1: 3) to (1: 1), and the concentration of mixed sludge is 3,000mg / L to 4,000mg / L. The dissolved oxygen is controlled to be 0.3mg / L to 0.5mg / L by adopting an intermittent aeration operating mode, and the accumulation amount of nitrite nitrogen at the end of aeration is 20mg / L to 30mg / L; in each cycle, three aeration and hypoxic stages are set at intervals; each cycle has six stages, i.e., water inlet, aeration / hypoxic reaction, stirred degassing, precipitating, water outlet and standing. In a starting process, the concentration of dissolved oxygen is controlled unchanged, the balance of supply and consumption of nitrite nitrogen is maintained through a method of stagewise prolonging aeration stage time and shortening hypoxic stage time, and the rapid increase of denitrification load is achieved. When the initial ammonia nitrogen concentration in the reactor reaches 300mg / L, the balance of supply and consumption of nitrite nitrogen is maintained by means of shortening the hypoxic stage time. According to the method, the starting speed is high, the total-nitrogen removal load is high, and the operation is stable.

The invention belongs to the technical field of sewage treating agents and particularly relates to a heavy metal sewage treating agent and a preparation method thereof. The heavy metal sewage treating agent is prepared from the following raw materials in parts by weight: 0.5-2 parts of amino trimethylene phosphonic acid, 1-5 parts of ethylene glycol tetraacetic acid, 10-20 parts of sodium polyacrylate, 5-15 parts of diethylene triaminepentaacetic acid pentasodium salt, 10-20 parts of polyaspartic acid, 20-30 parts of starch xanthate, 3-6 parts of graphene nanolayer / MnO2 compounds, 15-20 parts of crosslinked rectorite, 10-30 parts of polyaluminum chloride, 5-10 parts of chitosan-graphene composite and the balance of deionized water. The heavy metal sewage treating agent provided by the invention is high in purity, nontoxic, free of influence to operating staff and capable of ensuring no secondary pollution and other problems after water is treated.

The invention relates to the technical field of wastewater treatment, and particularly relates to a dyeing wastewater treatment agent and a preparation method thereof. The dyeing wastewater treatment agent comprises the following raw materials in parts by weight: 2-10 parts of ferrous sulfate, 20-30 parts of magnesium sulfate, 0.5-2 parts of polyacrylamide, 10-20 parts of iron nitrate, 1-5 parts of nickel nitrate, 40-60 parts of polyaluminum chloride, 10-20 parts of modified kieselguhr, 8-22 parts of meerschaum powder, 10-20 parts of crosslinked rectorite, 5-10 parts of chitosan-graphene composite material and 1-3 parts of graphene nano layer / MnO2 compound. The dyeing wastewater treatment agent provided by the invention has the advantages of convenient production method, low investment, quick effect taking and no secondary pollution.

The invention relates to a preparation method of large pore volume and large pore diameter silica. With industrial water glass as silica source, water soluble polymer and surfactant as hydrophobic agent and hole forming template, by controlling reaction conditions such as temperature, hydrophobic agent, final ph value, etc., the large pore volume silica products are produced; the pore diameter is narrowly distributed, the pore volume is between 2-2.5cm3 / g and the average pore diameter is between 18-35 nm. Especially, the more optimal three-step heating regulation is more beneficial to the stability of hole forming and hole structure and that the distribution of pore diameter reaches between 25-35nm is more proper to be used as flatting agent.

The invention belongs to the technical field of sewage treatment agents, and in particular relates to an oil-containing wastewater treatment agent and a preparation method thereof. The oil-containing wastewater treatment agent disclosed by the invention comprises the following raw materials in parts by weight: 35-45 parts of polyacrylamide, 15-25 parts of polymeric aluminium, 12-18 parts of expanded graphite, 15-20 parts of zeolite mineral, 20-30 parts of hydrolyzed tannin, 3-5 parts of organic acid, 5-10 parts of TiO2, and 3-5 parts of chitosan-graphene composite material. The oil-containing wastewater treatment agent disclosed by the invention has the advantages of being good in treatment effect, low in production cost, high in purity, free from toxicity, influence to operators and secondary pollution after treatment; the preparation method is simple and easy for popularization.

The invention provides a treatment method of heavy metal wastewater, and particularly relates to a method for treating heavy metal wastewater by virtue of a precipitation method. The method comprises the following steps: adding sodium sulfide in a heavy metal wastewater treatment process, reacting sulfur ions with heavy metal ions in the wastewater to generate particulate matters, further adding sulfide precipitates of heavy metal, stirring, standing, and accelerating the sedimentation of micro particulate matters and other substances by using generated particulate matter precipitates; further preferably adding quartz sand, and accelerating the rapid sedimentation of the particulate matters and other substances under the wrapping action of quartz sand; further performing subsequent process treatment including sand filtration and ion exchange on a supernatant liquor obtained after sedimentation to reach the emission standard; and periodically discharging and collecting part of the precipitates, and recycling heavy metals in the precipitates. Because the method provided by the invention is simple in working procedure, low in cost and high in efficiency, the method can be widely applied to the treatment of industrial wastewater particularly the heavy metal wastewater.

The invention discloses a dyeing wastewater treating agent and a manufacturing method thereof. The dyeing wastewater treating agent is prepared from the following raw materials in parts by mass: 70-100 parts of diatomite, 40-70 parts of attapulgite, 90-120 parts of modified starch, 15-40 parts of acrylamide, 2-10 parts of ferrous sulfate, 20-30 parts of magnesium sulfate, 10-25 parts of meerschaum powder, 10-20 parts of crosslinked rectorite, 0.5-2 parts of polyacrylamide, 20-30 parts of cationic monomer, 0.17-0.21 part of initiator and 0.09-0.1 part of crosslinking agent. The treating agent can perform the flocculating settling purification and disinfection functions on the dyeing wastewater, has the characteristics of wide raw material sources, lower cost and favorable treatment effect, and is convenient for popularization and application.

The invention discloses integrated water purifying and processing equipment. The equipment comprises an external barrel and an internal barrel, wherein a convex head is arranged at the top of the external barrel; a water outlet is formed in the center of the convex head; a conical bottom plate is arranged at the bottom of the external barrel; a mixer motor and a speed reducer are arranged in the center of the bottom of the conical bottom plate; the speed reducer is provided with a stirring shaft; the side wall of the conical bottom plate is provided with a dredge pipe; an escape pipe is arranged at the bottom of the conical bottom plate; the inner side of the external barrel is divided into a clean water zone, an inclined tube settling zone, a mud and water separating zone, a secondary cluster flocculation zone, a primary flocculation reaction zone and a mud collection zone in turn from top down; a sludge concentrating zone is arranged between the internal barrel and the external barrel; the equipment is provided with a coagulant quick coagulation device and a sludge hydraulic automatic backflow device to keep the concentration of the sludge in the reaction zone stable; the sludge concentrating zone is provided with a spiral bevel plate to efficiently concentrate the sludge; and the clean water zone is provided with a water collecting plate to realize pressure effluent. The equipment has a simple structure, compact layout and high space utilization rate, is convenient to operate, and is suitable for clarifying tap water in middle-sized and small cities and purifying industrial water by primarily removing turbidity.

The invention discloses a preparation method for pseudo-boehmite, which comprises the following steps: carbonizing sodium aluminate solution into grout heated up the grout to ageing temperature, aging, filtering, separating, washing and drying, wherein the method also comprises a step of: adding seed precipitation mother solution or seed precipitation cleansing solution into grout. The time for adding seed precipitation mother solution or seed precipitation cleansing solution is the time of heating the grout up to the ageing temperature or in the process of the grout aging. The preparation method for pseudo-boehmite can cause the water consumption of pseudo-boehmite to be reduced to 20 ton water per ton pseudo-boehmite, has very obvious water lowering effect; and indexes of pseudo-boehmitedoes not generate fundamental change.

The invention discloses a treatment process of lignite upgrading wastewater. The treatment process comprises the following steps: 1) adjusting the pH value of the wastewater to be treated to 3-11; 2) adding a flocculant to precipitate; 3) then adjusting the pH value to 4-8; 4) using the upgraded lignite as an adsorbent to adsorb; and 5) then using activated carbon as an adsorbent to adsorb. In the treatment process, the pH value is adjusted firstly and flocculation and precipitation are performed secondly to precipitate suspended pollutants, thus the precipitation effect can be increased; then the product of the lignite upgrading process, namely upgraded lignite is used as the adsorbent to adsorb, the porous structure of the upgraded lignite is used for replacing a lot of activated carbon to perform the adsorption of pollutants and adsorbing most of harmful substances; and finally a little activated carbon is used for performing final adsorption. Therefore, the dosage of the activated carbon can be greatly reduced, the cost can be reduced, the treatment process can realize low cost and high self-sustainability, and the real standard discharge of the lignite upgrading wastewater can be realized on the premise of successfully reducing the treatment cost of the lignite wastewater.

The invention relates to a self-circulated and ecological water saving type irrigating draining system and a draining method. The system is that an internal and external water control gate 2 is arranged between an outer river 1 and a water accumulating wetland area 3; a water pump station 4 is arranged in the water accumulating wetland area 3; a water draining wetland farm ditch 9 is communicated with the water accumulating wetland area 3; the water pump station 4 is connected with an underground water irrigating pipe 5, wherein the underground water irrigating pipe 5 is connected with a water distribution pond 6; the water distribution pond 6 is connected with a water inlet 8; a water distributing head 7 is arranged on the water inlet 8; the water accumulating wetland area 3 is connected with the water draining wetland farm ditch 9; the water draining wetland farm ditch 9 is connected with a draining rill 10; a ridge 11 is arranged between the water draining wetland farm ditch 9 and a farmland 12. The system has the advantages that the water environment for the crops growing is ensured, the utilization rate of water irrigated to the farmland can be increased, and thus the water resource can be effectively saved, and the crops output can be increased; water can be fully exchanged; the water environment mass of the river can be improved; the construction is simple; the popularization and application are convenient; a large amount of construction works can be saved; the system can be widely applied to the farmland.

The invention provides a vacuum lightweight well-point dewatering method, which comprises the following steps of: arranging at least one row of working face advanced vacuum dewatering pipes according to a certain annular interval within a certain angle range of working face vault; excavating an upper step, and arranging at least one row of first vacuum dewatering pipes at a certain distance under the arch foot of the upper step; and excavating an intermediate step, and arranging at least one row of first vacuum dewatering pipes at a certain distance under the arch foot of the intermediate step. The dewatering pipes are arranged according to an excavating working method adopted in tunneling, therefore the method disclosed by the invention has the advantages of simple process, convenience for construction and operation, low energy consumption, low construction cost and good dewatering effect; and the construction equipment is simple to assort, the arrangement of large-scale equipment when other dewatering methods are adopted is reduced, and the construction equipment has the advantages of simpleness in installation, strong operability and convenience for maintenance.

The present invention provides the biosynthesis of Schwertmannite as high efficiency adsorbent and its usage in adsorbing to eliminate Cr(VI) and As from waste water and underground water. Schwertmannite is prepared with ferrous sulfate as reactant, deionized water as reaction medium and Thiobacillus ferrooxidans LX5 as catalytic oxidant, and through stirring for 1-3 days, filtering to collect precipitate, washing with sulfuric acid acidified deionized water, washing with deionized water and stoving. Schwertmannite is added into water to be treated in the amount of 0.5 wt% or 0.02 wt%, dilute nitric acid is added into Cr(VI) containing system to regulate the pH value to 5.0-7.0 or sodium hydroxide is added into As containing system to regulate the pH value to 6.0-10.0, and the system is stirred for 3 hr and filtered to eliminate Cr(VI) and As. Schwertmannite has maximum adsorption amount on Cr(VI) and As of 55 mg / g and 65 mg / g separately.

The invention relates to the technical field of aquiculture water processing and discloses an aquiculture integrated water processing unit, which comprises a hopper-shaped pool body (10); a hole plate (22) is arranged at the upper part of the pool body (10); a filter material (20) for light weight foaming grains is arranged on the lower part of the hole plate (22); a communicating hole (41) and aback-flushing air chamber (40) are arranged at the lower part of the conical surface of the pool body (10); an intake pipe (42) and an exhaust pipe (43) are respectively arranged above the pool body;and a screen (21) is arranged at the lower part of the cylinder of the pool body (10). A flushing method for the aquiculture integrated water processing unit is as follows: a discharge pipe (15) is opened and then is closed; the intake pipe (42) is opened for charging air; the water in the back-flushing air chamber (40) is pressed into the pool body (10); when the back-flushing air chamber (40) is filled with air, the intake pipe (42) is closed and the exhaust pipe (43) is opened instantly; then the air is exhausted and the water in the pool body (10) quickly enters the back-flushing air chamber (40); then the filter material (20) downwards expands and looses; and the intercepted suspension solids and aged biomembrane fall into the water and the filter material (20) is flushed. The filtermaterial has high water processing efficiency, good back-flushing effect and low energy consumption.

The invention relates to the field of metal smelting and particularly relates to a method for efficiently recovering copper and rhenium from copper smelting waste acid. The method comprises the steps: filtering copper smelting waste acid serving as a raw material for the first time, heating the filtered copper smelting waste acid in a reaction tank, and detecting the initial oxidation reduction potential by using an oxidation reduction potentiometer; then, sequentially adding a flocculant and thiosulfate for reaction, and controlling the reaction time through discontinuously detecting the oxidation reduction potential in the reaction process; and finally, carrying out secondary filtration to obtain a filter residue, i.e., a copper and rhenium precipitate. By using the method, copper and rhenium in the waste acid can be thoroughly settled, the sedimentation effect is improved under the action of the flfocculant, and thus, the recovery rates of the copper and the rhenium are increased; the recovery rate of copper is higher than 95%, the recovery rate of rhenium is higher than 98%, the sedimentation rate of arsenium is relatively low and is only about 10%, and the obtained filter cake contains 2-4% of rhenium and 10-20% of copper; and meanwhile, silver and bismuth are also recovered, and the silver content is up to 2-5%, and the bismuth content is up to 6-10%.

The invention relates to a treatment system and an operation method of phosphorus-containing organic wastewater. A chemical phosphorus removal system is combined with an aerobic biochemical system, thus forming a system that removes phosphate and organic matters in the effluent of an aerobic removal system. The chemical phosphorus removal system consists of a chemicals feeding system, a mixed reaction pool, a sedimentation pool, a residual sludge refluxing system and a chemical sludge refluxing system. The aerobic biochemical system consists of an aerobic contact oxidation system and an aerobic activated sludge system. During the process of chemical phosphorus removal, sulfide and part of the organic matters can be removed simultaneously, thus causing the subsequent aerobic process to run stably and reducing running cost thereof. The residual sludge of the aerobic biochemical system is subjected to aeration and then refluxes to the chemical phosphorus removal system, and flocculation is absorbed and chemical sludge flocculating constituents are settled by utilizing residual activated sludge, thus improving chemical phosphorus removal efficiency. Part of the chemical phosphorus removal sludge refluxes after aeration, thus reducing the feeding amount of chemicals and reducing running cost. The treatment system and the operation method can cause organic wastewater with high phosphorus concentration to reach strict discharge standard after being treated.

The invention relates to the formulation and the preparation method of a lead-free composite glass adhesive solar battery positive silver paste. A lead-free glass adhesive is designed. The positive silver paste made of the lead-free glass adhesive is an environment-friendly material. A crystalline silicon solar battery made of the positive silver paste has the advantages of high conversion efficiency and strong electrode adhesion. According to the lead-free glass adhesive, a silicon (Si)-tellurium (Te)-germanium (Ge) composite glass material is used; Bi2O3, Al2O3, ZnO, a transition metal oxide, an rare earth metal oxide, an alkaline earth metal oxide and the like are added; the composite glass adhesive can quickly dissolve and precipitate silver grains in a battery sintering process; a good conductive path is formed between a silver thick film electrode and an emitting area n-Si; Ag-Si ohmic contact is formed; the series resistance of the battery is reduced; the conversion efficiency of the battery is improved; and through the composite glass adhesive, firm adhesion of a silver electrode and a silicon substrate is generated, and a positive silver electrode has strong adhesion.

The invention relates to an urban sewage treatment device and method for quick realization of partial nitrification based on free nitrous acid inhibition and belongs to the field of sewage treatment. The method comprises the steps that an FNA treatment unit is arranged in parallel in the sludge backflow process of a traditional A2 / O technology secondary sedimentation tank, the growth activity of nitrite oxidizing bacteria (NOB) is partially inhibited by using the selective bacterium inhibiting effect of FNA on ammonia oxidizing bacteria (AOB) and NOB under the anoxic condition, sludge then flows back to a main flow A2 / O reactor, NOB in active sludge are gradually elutriated under the effect of sludge age control, and thus partial nitrification of the urban sewage is quickly achieved in the main flow A2 / O reactor. The method is simple, heating or real-time control is not needed, and a good sedimentation effect is achieved; in addition, phosphate removal and nitrogen removal are carried out simultaneously, the phosphate removal effect is not affected by addition of the FNA treatment unit, the efficient and simultaneous phosphate removal and nitrogen removal effect of the low-carbon source urban sewage is achieved, and the urban sewage treatment device and method for quick realization of partial nitrification based on free nitrous acid inhibition are suitable for upgrading transformation of existing urban sewage plants.

The invention relates to the field of treatment to heavy metal pollution in water and soil, in particular to a preparation method of multi-site activated and modified reed-lutarioriparius biochar andapplication thereof to removal of heavy metals zinc and cadmium. The preparation method comprises the following steps: firstly washing, drying and crushing reed-lutarioriparius biomass, ultrasonicallystirring in an aqueous manganese ore powder solution thoroughly, then performing low-temperature hydrothermal carbonization to produce unactivated and unmodified biochar, then soaking the biochar ina calcium chloride-hydrogen peroxide mixed solution, activating a biochar-calcium chloride-hydrogen peroxide mixed solution by using microwave, and then modifying the dried biochar through ultravioletradiation to obtain activated and modified biochar, wherein the obtained biochar is applied to the removal of the heavy metals zinc and cadmium in the water and the soil. An application method comprises the following steps: adding the activated and modified biochar into heavy metal zinc and cadmium wastewater for an adsorption reaction; or directly adding into heavy metal zinc and cadmium contaminated soil, thoroughly mixing uniformly, and aging for a period of time to complete bioremediation of heavy metal zinc and cadmium pollution in the soil.

The invention discloses a deep strengthening method of dewatering reinforcement combined dynamic consolidation, which comprises the following steps: V1ing: a vertical drainage body is arranged in a strengthened foundation. V2ing, soft soil foundation is done with the dewatering reinforcement. V3ing, after a deep soil body below 8 meter of the ground surface of the strengthened foundation is acted by the dewatering reinforcement, the consolidation degree is above to 75 percent, and then the consolidation construction is done. The invention combines a dewatering reinforcement method and a dynamic consolidation method to be applied to strengthen the deep soil body of the soft soil foundation, particularly the permeability coefficient is not less than 10-6cm / s, and the water content of the soil body before the dynamic consolidation is not higher than a strengthened soft soil foundation which is 20 percent of the best water content. The foundation reinforcement effect is obvious, the construction period is capable of being reduced 1 / 3-2 / 3 as a whole, the construction cost is greatly reduced, the cost is saved (compared with a vacuum preloading method, the treatment cost in each square meter is reduced by 30-50 percent ), because the operating intensity is small, the demand for equipment is not high, and the deep strengthening method is suitable for popularization and application.

The invention discloses a total nitrogen treatment method suitable for high concentration and degradation-resistant organic wastewater. The method includes the pre-anaerobic tank treatment and two-stage A / O (anaerobic / oxic) treatment process, wastewater successively passes through a pre-anaerobic tank, a first settling tank, a first-level anaerobic tank (A1), a first-level oxic tank (O1), a second settling tank, a second -level anaerobic tank (A2), a second -level oxic tank (O2) and a third settling tank for processing; a denitrification microbial inoculums can be added into the first oxic tank and the second oxic tank for biological enhancement. The total nitrogen treatment method is simple in technological process, the pre-anaerobic tank is used in the front stage to reduce the effect of organic loading rate on a subsequent biochemical system, the biodegradability of the high concentration and degradation-resistant nitrogen-containing organic wastewater can be improved, at the same time, the organic state ammonia nitrogen is transformed into inorganic state nitrogen, and subsequent biological nitrification and denitrification can be facilitated. By use of the two-stage A / O (anaerobic / oxic) treatment process for processing the wastewater, the total nitrogen removal efficiency can be effectively improved. The method is suitable for processing degradation-resistant nitrogen-containing wastewater such as coking wastewater, pharmaceutical wastewater, monosodium glutamate wastewater, fermentation wastewater and the like, and also can be used for processing domestic sewage and municipal sewage.

The invention discloses a method for extracting glycotropic protein from seaweed. The method for extracting the glycotropic protein from the seaweed comprises the following steps: preparing raw materials, carrying out ultrasonic wave treatment, carrying out high pressure treatment and protein crude extraction, purifying protein, and drying, so that the glycotropic protein product is obtained. Compared with the prior art, the method for extracting the glycotropic protein from the seaweed has the advantages that product content is high and time is greatly shortened.

The invention belongs to the technical field of water treatment, and particularly relates to a steel pickling waste water resourcization and zero discharge process. The steel pickling waste water resourcization and zero discharge process comprises the following process steps of: (a) introducing steel pickling waste water; (b) carrying out Fenton reaction on the steel pickling waste water to reduce the COD (Chemical Oxygen Demand) of the steel pickling waste water to be less than or equal to 60 mg / L, convert Fe<2+> into Fe<3+> and reduce TDS (Total Dissolved Solids) to be less than or equal to 2000 mg / L; (c) carrying out FeC microelectrolysis reduction reaction on the steel pickling waste water; (d) carrying out neutralization flocculation; (e) desalting a membrane assembly to reduce the TDS of the steel pickling waste water to be less than or equal to 200 mg / L; (f) recycling effluent water. The steel pickling waste water resourcization and zero discharge process disclosed by the invention realizes the cleaning production, realizes the resourcization utilization of waste water, waste acid and iron mud, generates the benefit and realizes the zero discharge.

The invention discloses a method and system for handling fracture flowback liquid. The method comprises the steps 1) the fracture flowback liquid is collected into an adjusting pool for homogeneity and average handling; 2) output water in the step 1) is fully stirred and reacts with coagulant for 1-2 hours in a pre-handling pool and is deposited for 0.5-1 hour in a standing mode; 3) output water in the step 2) is stirred and reacts with oxidizing agents for 0.5-1 hour in a primary oxidation pool and is deposited for 0.5-1.5 hours in a standing mode; 4) output water in the step 3) is firstly handled for 0.5-1 hour through activated carbon adsorption in an advanced oxidation pool, and then is stirred and reacts with advanced oxidizing agents for 0.5-1 hour, and the output water meets standards to be discharged out or recycled. According to the handling method and system, the removal rate for suspended matter, COD and refractory pollutants in the fracture flowback liquid is high, the handling effect is good, handled waste water can be discharged by meeting the standards and can be recycled, sustainable utilization of resources is achieved, and water pollution is reduced.

The invention discloses a negative pressure air jet deep well dewatering device of a foundation pit. The negative pressure air jet deep well dewatering device comprises a negative pressure system, a positive pressure system and a deep well pipe assembly. The negative pressure system is composed of a vacuum pump, a drain pipe, a vacuum water main and a vacuum branch water pipe. The positive pressure system is composed of an air compressor, an air main, a branch air pipe, a switching valve and an air tap. The deep well pipe assembly is composed of a well pipe and a well cover. The vacuum branch water pipe of the negative pressure system extends into the well pipe through the well cover. The branch air pipe of the positive pressure system extends into the well pipe through the well cover, or penetrates into the vacuum branch water pipe from the outside of the well cover and extends into the well pipe together with the vacuum branch water pipe. The negative pressure air jet deep well dewatering device is additionally provided with the set of positive pressure system, improves the dewatering speed in the initial dewatering period, and has the advantages of high work efficiency, easiness in construction and good dewatering effect as the vacuum branch water pipe can reach downwards to the dewatering depth of the foundation pit in one time without adjustment.