63results about How to "Little impact on water quality" patented technology

The invention relates to an environment-friendly holothurian compound feed which is holothurian basal feed comprising algae powder, fish meal, bean pulp, sea mud, corn flour, shell powder, multi-vitamin and mineral substance, and is characterized in that the holothurian basal feed is added with 0.1% of phytase and cellulose as enzymic preparations; the holothurian basal feed is added with 0.1% of photosynthetic bacteria, ammonifying bacteria, nitrifying bacteria, denitrifying bacteria and nitrite bacteria as microbial preparations; and the holothurian basal feed is added with 2% of sodium alginate and 3% of cassava alpha- starch as auxiliary agents. Compared with the existing commodity holothurian feed, the stability of the environment-friendly holothurian compound feed in water is remarkably improved, the loss rate of nutrient components is remarkably reduced, influence for the water quality of the aquaculture is low, and the turbidity, the ammonia nitrogen content and the chemical oxygen demand (COD) value of the water are obviously reduced after baiting. Meanwhile, the preparation method and technique of the feed are simple, the cost is lower, large-scale production is easily carried out, and the environment-friendly holothurian compound feed has good popularization and application prospects in the holothurian production.

The invention relates to a deep water sampling system. The system comprises a generator, a sampling container, a sampling container fixing base, a water inlet, a water outlet, a vent valve, a vacuum negative pressure gauge, a water sample intake, a water pump and a sampling water tube, wherein the generator provides power support for the system; the water inlet, the water outlet, the vent valve, the vacuum negative pressure gauge and the water sample intake are arranged on the sampling container; the water pump is connected with the sampling container; a bottom valve and a heavy object are connected to the sampling water tube; the sampling water tube is provided with a water depth detector; the generator is connected with the water pump; the water pump is connected with the water outlet on the sampling container; and the sampling water tube is connected with the water inlet on the sampling container. The whole system adopts the water pump to pump water and the front end of the water pump is connected with the sampling container for sampling a water sample, so that the may influence of water flow passing through the pump on sampling of the water quality is avoided. The system has simple structure, is convenient to operate and use and is economic and practical. Water at different depths of deep water areas such as rivers, lakes and the like and narrow water areas such as a mountain channel deep reservoir and the like without large-size ships can be accurately sampled.

The present invention relates to a zero emission district sewage resource treatment apparatus, wherein quality of water treated by the apparatus can meet reuse requirements. The apparatus comprises a biochemistry treatment system, a physical chemistry treatment system, a disinfection system and a biological deodorization system. The biochemistry treatment system comprises grille, a regulation tank, a lifting pump and an aeration biological filtration tank, wherein the grille, the regulation tank, the lifting pump and the aeration biological filtration tank are sequentially connected through pipelines, a filler is arranged inside the aeration biological filtration tank, and a filler filling height is 1-2 m. The physical chemistry treatment system comprises a middle water tank, a quartz sand filter and an active carbon filter. The disinfection system comprises a disinfection tank and a chlorine dioxide generator, wherein a contact time in the disinfection tank is 2 min. Odor generated by sewage inside the regulation tank is collected, and then is subjected to absorption degradation by the biological deodorization system. According to the apparatus, advantages of the biological treatment process are completely provided, physical chemistry treatment cost is minimized, equipment is simple, operation cost is low, and the apparatus is a practical and feasible technology for district sewage treatment and reuse.

The invention discloses a purification method for oilfield reinjection water. According to the method, at least one level of membrane filtration treatment is carried out on oilfield produced water through a cellular carrier type inorganic carbon membrane component so as to prepare the reinjection water suitable for low permeability and extra-low permeability oil reservoirs, wherein the filter precision of the membrane component for membrane filtration treatment is 0.001-100mu m. The purification method has high filtration accuracy, the membrane flux of the compound carbon membrane carrier is large, the capacity of the membrane in resisting oil contamination is strong, the integration level of the structure of the membrane core is high, the quality of the prepared reinjection water is stable, and fine filtrated oilfield reinjection water meets the requirement of the reinjection water for the oil reservoirs in low permeability and extra-low permeability block, and meets the A-grade standard of 'recommended index and analysis method for quality of oil reservoir injection water of clastic rock' (SY/T 5329-94).

The invention discloses a polyurethane grouting material and a preparation method thereof. The polyurethane grouting material comprises polyhydric alcohols, polyisocyanates, an organic amine catalyst, an organic tin catalyst, a chain extender and a foam stabilizer. The content of the components is as follows: 1 part of polyhydric alcohols and 1 part of polyisocyanates are contained; the content of the organic amine catalyst is 0.3% of the mass of the polyhydric alcohols; the content of the organic tin catalyst is 1.6% of the mass of the polyhydric alcohols; the content of the chain extender is 0.6% of the mass of the polyhydric alcohols; the content of the foam stabilizer is 1.0% of the mass of the polyhydric alcohols. The preparation method comprises the following steps: dividing the raw materials into two components, wherein the component A includes polyisocyanates and the component B includes the polyhydric alcohols and the additives; adding a defined amount of water into the component B; mixing the components A and B and quickly and fully stirring. The polyurethane grouting material prepared according to the preparation method has the advantages of low toxicity, low pollution, excellent grouting performance, low cost, convenience in construction, and the like, and meets national relevant standard and requirement for water plugging construction in China.

The invention relates to the technical field of water environment and ecology restoration, in particular to immobilized preparation and application of algicidal bacterium microspheres. Bacterial cells in cultured algicidal bacterium liquid are separated and suspended in a beef extract peptone liquid culture medium 20-80% of original sample volume, polyvinyl alcohol and sodium alginate are selected as embedding bodies, a saturated boric acid solution of calcium chloride serves as a cross-linking agent, and immobilized cross-linking is performed at the temperature of 4 DEG C for 16-32 hours to prepare the algicidal bacterium microspheres. In addition, the invention discloses application of the algicidal bacterium microspheres in inhibiting of alga overgrowth, repeated adding of algicidal bacteria is avoided, and disposable addition of the algicidal bacteria is achieved. A nutrient substance adding mode is improved, the algicidal bacterium inhibiting effect of the algicidal bacteria is not affected, and water quality influence is also not brought. The preparation process is simple, the cost is low, large-scale popularization is easy, secondary pollution is not produced, and the algicidal bacterium microspheres provide an effective way for water bloom treatment.

The invention discloses a dynamic preparation method and an application in enhanced oxidation filtration, and relates to a preparation method and enhanced oxidation filtration application of a catalyst. The invention aims to solve the problems that the existing manganese removal technology is difficult to meet the requirement of removing various heavy metal pollution, and is long in curing period, large in chlorine feeding amount, low in catalytic activity and poor in heavy metal removal effect. The method comprises: 1, performing adsorption; 2, preparing manganese-loaded zeolite particles; 3, constructing a manganese-loaded zeolite filter column, a manganese-loaded zeolite filter tank or a manganese-loaded zeolite filter tank; 4, dynamically constructing a zeolite filter column, a zeolite filter tank or a zeolite filter tank containing the nascent nano layered manganese catalyst. The nano layered manganese catalyst is used to remove heavy metals from heavy metal-containing water. The removal rate of the prepared nascent-state nanometer layered manganese catalyst on iron, arsenic, thallium, molybdenum and lead reaches 95% or above, and it can be guaranteed that effluent stably reaches the standard for a long time. The invention can produce the nascent-state nanometer layered manganese catalyst.

The invention relates to a heavy metal wastewater treatment system and method by removing complexes. The system comprises a stirring reactor and a membrane separation tank, wherein the stirring reactor is used for mixing complex-state heavy metal sludge wastewater, a pH regulation solution and a complex breaking agent to perform reaction in the stirring state, so that at least part of complex-state heavy metal ions are converted into the granular state; the membrane separation tank is connected with the stirring reactor; an interception membrane is arranged in the membrane separation tank, and used for intercepting granules in the mixed solution after reaction, the sludge granular layer formed by interception and the interception membrane further capture the granular-state heavy metal granules and the complex-state heavy metal ions which do not sufficiently react under the synergic actions, and the captured substance becomes the part of the sludge granular layer and participates in interception; and clear water passes through the interception membrane and is sent to a clear water tank by a membrane suction pump. The method can effectively remove the complex-state heavy metal ions and avoid the problem of high sludge output caused by the addition of the flocculant and coagulant aid.

The invention discloses a net cage netting damage detection method and device based on a mathematical twinborn technology and a storage medium, and relates to the technical field of disaster prevention and reduction of aquaculture engineering and ocean engineering, and the method develops a digital twinborn body for netting damage detection by using a method of combining numerical simulation and an artificial neural network. The identification model can carry out rapid damage identification according to environmental parameters and tension sensing data. Firstly, an equivalent numerical model of the fishing net is used for simulating the completeness and damage conditions of the fishing net to obtain a large amount of simulation sensing data, then the data are used for training an artificial neural network, the artificial neural network can identify whether the netting is damaged or not according to different simulation sensing signals, and finally, according to the real sensing data, the artificial neural network can identify whether the netting is damaged or not. The identification model can rapidly identify whether the netting is damaged or not. According to the invention, real-time damage monitoring of the fishing net is realized, the labor cost is saved, the detection efficiency is improved, and the limitation of netting or environmental interference is overcome.

The invention discloses a method suitable for intermittent operation of a biological activated carbon filter tank. The method comprises the following steps: S1, controlling water height in a carbon tank to submerge activated carbon in the carbon tank when the biological activated carbon filter tank stops operating, and changing water of the carbon tank at set intervals until the biological activated carbon filter tank operates again; S2, back flushing the biological activated carbon filter tank before the biological activated carbon filter tank operates again; S3, opening a water inlet/outlet valve and starting an ozone generator after back flushing finishes until a DOC and DON removal rate reaches a normal operation level; S4, adjusting a water inlet flow and an ozone adding amount to the size in normal operation, and beginning operating the biological activated carbon filter tank. The method disclosed by the invention has the advantages of effectively shortening restarting time of the biological activated carbon filter tank, thus enabling the biological activated carbon filter tank to be quickly put into production, obviously improving a production procedure of a tap water plant, reducing production cost of the water plant, saving resources and energy, and achieving higher practicability and wide applicability.

The invention discloses a traditional Chinese medicine composition for treating gill rot of grass carp. The traditional Chinese medicine composition comprises the following raw materials in parts by mass: 8 to 10 parts of euphorbia maculate, 4 to 6 parts of onychium japonicum, 8 to 12 parts of polygonum hydropiper, 2 to 4 parts of melia azedarach barks, 8 to 12 parts of agrimonia pilosa, 2 to 3 parts of acorus calamus, and 0.4 to 0.6 part of Ganshan tobacco stems. An application method of the traditional Chinese medicine composition comprises the following steps: weighing the Chinese herbal medicine according to the ratio, then adding 80 to 100 parts of clean water, putting the Chinese herbal medicine into a pot, boiling the Chinese herbal medicine for 40 minutes, adding 3 parts of slakedlime and 0.5 part of salt after cooling, leaving the traditional Chinese herbal medicine to stand, soaking the composition into young grass, then feeding grass carp, and continuously feeding grass carp for 3 to 5 days. The traditional Chinese medicine composition treats gill rot of grass carp though Chinese herbal medicine, ensures that the cure rate reaches greater than 90 percent, meanwhile doesnot have any side effect, is small in influence on water quality, does not affect the later growth of crass carp, and guarantees the economic benefit of farmers.

The invention belongs to the technical field of fluid ore exploitation of petroleum, natural gas, shale gas and the like, and particularly discloses a suspension supporting agent. The suspension supporting agent comprises aggregates and a coating layer, wherein the coating layer comprises resin, a catalyst, a curing agent and an additive, and the suspension supporting agent is characterized in that the aggregates are quartz sand, the additive is an amines compound, the coating layer comprises an inner coating layer and an outer coating layer, the outer coating layer is prepared from polyalcohol resin, isocyanate and a catalyst, the amines compound is added into the outer coating layer, the isocyanate is 40 to 70 percent of the polyalcohol resin, and the hydroxyl equivalent amount of the polyalcohol resin is 60 to 300. The suspension supporting agent is mainly used for exploiting petroleum and shale gas, and solves the problems of the supporting agent used in clean water that the cost is increased due to the use of a cementing agent and the environment is polluted.

The invention discloses a drainage pipeline and open channel flow measuring device in the technical field of flow measurement has characteristics of simple structure, capability of recording measurement data, immediate utilization after assembly, no need of disassembly, small influence of water quality and wide application range.. The device comprises a first supporting rod and a second supportingrod, wherein one end of the first supporting rod is in threaded connection with one end of the second supporting rod, the other end of the first supporting rod is connected with a first supporting disc, the other end of the second supporting rod is connected with a second supporting disc, a sealed central control box is fixed on the first supporting rod, a data collector is fixed in the sealed central control box, a plurality of sensor fixing rods are connected with the second supporting rod, flow velocity sensors and water depth sensors are arranged on sensor fixing rods, and flow velocity sensors and water depth sensors are connected with a data collector through data wires.

The invention discloses a geothermal heating system for combining gradient flash evaporation afterheat recovery with a heat pump technology. The system comprises a submersible pump and a heating circulating water pump, and further comprises a first-grade flash evaporator and a second-grade flash evaporator; an outlet of the submersible pump is connected with the first-grade flash evaporator; and the first-grade flash evaporator is serially connected with the second-grade flash evaporator. The system further comprises a first-grade condenser and a second-grade condenser; the first-grade flash evaporator is connected with the first-grade condenser; and the second-grade flash evaporator is connected with the second-grade condenser. The system further comprises a heat pump; the heat pump is connected with the second-grade condenser; and the heating circulating water pump is connected with the first-grade condenser and the heat pump. The novel geothermal heating system built by the gradientflash evaporation and the heat pump technology uses heat recovered by the second-grade flash evaporator as a heat source of a heat pump main machine, so that heat in geothermal water is fully recovered; and meanwhile, the influence on the heating system by the water quality of geothermal water is lower, so that bad scaling caused by geothermal mineralization degree hot water is prevented.

The invention provides a standing-free dynamic membrane formation method and device. The method comprises the steps that a flocculating agent and a coagulant aid are added into sewage, precipitated pollutants form big flocculations by combining the hydraulic condition, and a standing-free dynamic filter membrane is formed in the device. The device comprises a water distributor, a taper hopper and a straight cylinder which are connected in sequence from bottom to top, a water inlet pipe is arranged on the water distributor, a big opening of the taper copper faces upwards, the straight cylinder is provided with a collecting pipe and a water outlet pipe, and the height of the water outlet pipe is higher than that of the collecting pipe; to-be-treated sewage is fully mixed with medicament to enter the water distributor through a water inlet pipe, and the medicament comprises the flocculating agent and the coagulant aid. According to the standing-free dynamic membrane formation method and device, limitation of environment or inflow water quality or inflow water flow velocity on the dynamic membrane is reduced to the minimum, and meanwhile preparation operation of the dynamic membrane is greatly simplified, and the investment cost is lowered.

The invention discloses a process for treating fine chemical medical intermediate wastewater, which comprises a pretreatment section of a Fe/C microelectrolysis unit, a multi-effect evaporation unit and an advanced oxidation unit, a biochemical section of an enhanced AO biological contact oxidation unit and an MBR unit, and a deep treatment section of DTRO membrane recycling. The pyrolysis section comprises a concentrated salt solution pyrolysis gasification unit and a flue gas treatment unit. The medical intermediate high-salt-content wastewater is subjected to multi-effect evaporation and pyrolysis treatment, the treatment amount and treatment cost of waste salt can be reduced, the environmental protection fund pressure of enterprises is reduced, pretreatment, biochemical treatment and deep treatment are combined for treatment, the influence of the water quality of raw water is small, operation has flexibility and impact resistance, effluent is stable and reaches the standard, and the treatment cost is low. The method can realize no discharge of enterprise wastewater, save water resource utilization, reduce enterprise industrial water consumption, reduce water environment pollution and guarantee water environment safety.

The invention discloses a carbon dioxide free radical based oxygen-containing liquid deoxygenation method which comprises the following steps: (1) an oxygen-containing liquid is mixed with formate and hydrogen peroxide so as to obtain a mixed liquor, wherein the molar concentration ratio of hydrogen peroxide to formate is 1:20-25; and (2) the mixed liquor enters a contact tower to undergo a contact reaction with an active carbon catalyst bed while empty bed contact time is 10-20min. The method provided by the invention is a deoxygenation method which has advantages of mild condition and no harmful substance residue. By the adoption of the method, problems of complex operation, expensive equipment and slow deoxygenation speed existing in a present physical method and problems of expensive catalyst, high energy consumption, heavy metal and slow deoxygenation speed existing in a chemical deoxygenation technology are solved. According to the invention, dissolved oxygen in water can be removed while salinity of water will not be increased. Thus, the influence on the water quality is little.