41results about How to "Avoid secondary pollution and other problems" patented technology

The invention discloses a method for improving dewaterability of activated sludge through addition of a microbial flocculant. According to the method, Klebsiella pneumoniae capable of generating the microbial flocculant is separated, purified and screened from activated sludge in a sewage treatment plant, then shake fermentation cultivation is carried out at a temperature of 25 to 40 DEG C at a rotating speed of 100 to 200 r/min for 2 to 3 d, and a flocculant sample is extracted from fermentation supernatant through frozen ethanol precipitation; and the microbial flocculant is added into an activated sludge sample, specific resistance of filtration (SRF) and water content of the regulated sludge are respectively reduced to 4.66*10<12> m/kg and 83.74%, and compared to chemical flocculants like aluminum sulfate and poly aluminum chloride (PAC), the microbial flocculant enables a better dewatering effect to be obtained. The microbial flocculant has good adaptability to characteristics like sludge salt waste and a pH value, and the regulated activated sludge has substantially improved dewaterability and the advantages of easy biodegradability, high efficiency, no toxicity, etc.

The invention provides a liquid discharging structure and a closed container with the same. The liquid discharging structure comprises a liquid outlet arranged on the closed container, and a partition board arranged inside the liquid outlet to divide the liquid outlet into an air inlet channel and a liquid discharging channel; the part, located inside an inner cavity of the closed cavity, of the partition board is fixedly provided with a baffle used for preventing liquid from directly impacting on the air inlet channel. During using, when the closed container with the liquid discharging structure pours liquid outwards, liquid flows outwards from the liquid discharging channel, external airflow stably and continuously flows into the closed container from the air inlet channel and a gas runner to balance the inner and outer pressure difference, so that the flowing interface of liquid flowing beams is stabilized conveniently, fluctuation and splashing of the liquid flowing beams are reduced, and the pouring speed is increased.

The invention discloses a transverse epitaxial growth method for double buffer layers for improving the brightness of an LED (Light Emitting Diode). The method comprises the following steps: 1) growing a first AlxGa1-xN buffer layer at a low temperature by using conical PSS (Polysaccharide Sulfate) as a growth substrate, wherein 0<=x<=1; 2) growing a first U-GaN layer with hexagonal conical array micro pits at a high temperature; 3) performing high-temperature annealing in an NH3 environment, then cooling to a low temperature, and growing a second low-temperature AlxGa1-xN buffer layer; 4) growing a second U-GaN layer at a high temperature to completely cover the hexagonal conical array micro pits of the first U-GaN layer, and forming cavities at the micro pits; 5) sequentially growing a SiH4-doped n-GaN layer, a multi-quantum well active layer, a doped p-type AlGaN barrier layer and a doped p-type GaN layer; and 6) annealing in nitrogen. According to the method, a layer of hexagonal conical array micro pits is grown on the sapphire substrate, and the buffer-2 is grown on the GaN in the area, namely GaN is grown on the GaN substrate, so that crystal nuclei with fewer defects, lower internal stress and lower crystal orientation difference can be obtained.

The invention discloses a method for generating hydroxide radicals by employing ultrasonic atomization-assisted ionization discharge. The method comprises the following steps: submerging a high-frequency piezoelectric ceramic plate with an aqueous hydrogen peroxide solution, so as to prepare an ultrasonic transducer; converting electric energy into mechanical resonance by virtue of the transducer; exerting a resonant electrical signal, so that the transducer generates ultrasonic vibration in the range of 1-2MHz; atomizing a hydrogen peroxide solution into aerosol of which the diameter is 0.1-1mum by virtue of an ultrasonic wave; feeding the aerosol into an ionization discharge plasma reactor; generating hydroxyl radicals under action of high frequency and high voltage, wherein the concentration of hydrogen peroxide is 1%-20%; discharge in the plasma reactor is narrow-gap strong ionization gas discharge; the discharge reduced electric field intensity is 400Td-600Td; a fan is arranged at the outlet of the plasma reactor; and a gas flow with the hydroxide radicals, which is obtained after the fan is started, is conveyed to the surface of a to-be-sterilized object.

Disclosed is an ozone pre-oxidation water treatment method. The water inlet quantity of a first water inlet (6) and the amount of ozone outputted by an ozone diffuser (9) are controlled by an electric control unit (10), so that water within a range with ozone concentration of 0.8-0.9 milligram per liter and the ozone within the range are oxidized for 5 minutes, the electric control unit (10) controls stirring of a first adjustable stirrer (19) and the vibration strength of an ultrasonic vibration array (20) to perform one-minute continuous stirring and vibration according to the water inlet quantity of a second water inlet (16), a second adjustable stirrer (22), a third adjustable stirrer (23) and a fourth adjustable stirrer (24) perform stirring for 15 minutes, reactants are conveyed to a precipitating portion (4) and precipitated for 35 minutes, and the water entering a filtering portion (5) passes a filtering layer (34) and then is drained from a fifth water outlet (33).

The invention belongs to the technical field of water purifiers, and particularly relates to an automatic cleaning controlling system and method of a water tank and a water purifier. According to theautomatic cleaning controlling method of the water tank, the liquid level in the water tank is maintained in a high liquid level state; an ultrasonic generator emits ultrasonic waves; a transducer starts to vibrate after receiving the ultrasonic waves, and the vibration is transmitted to water tank walls for vibration; during the transmission process of the water tank walls, liquid in the water tank is driven to vibrate at the same time to conduct cavitation and produce bubbles; when the bubbles burst, shock waves continuously impact the inner surfaces of the water tank walls, and therefore stains on the surfaces quickly disperse, emulsify and fall off, and automatic water tank cleaning is conducted. The self-cleaning of a built-in water tank is realized by the ultrasonic cavitation technology, and the problems such as the tedious of manual disassembling and cleaning, water tank damage caused by manual disassembling and cleaning and the secondary pollution to the water tank caused by long-term liquid immersion of dirt on the inner walls of the water tank are avoided. A convenient control method is provided for cleaning impurities in the water tank.

The invention discloses a water pollution treatment structure. The water pollution treatment structure comprises a first supporting section (1), a net-shaped section (2) and a second supporting section (3) which are successively connected; the first supporting section, the net-shaped section and the second supporting section form a square frame of which the top surface and one of side surfaces areopen in a surrounded manner; the height of a bottom plate of the square frame is reduced from the open end of the side surface to the other end to form a wedge; the first supporting section and the second supporting section are connected through a telescopic rod (4) capable of stretching and retracting in the horizontal direction and an elastic resetting element (5); at least one air bag (6) capable of sliding in the vertical direction is arranged on the outer side surface of each of the first supporting section and the second supporting section; the net-shaped section can shrink or unfold; and a through filter hole (7) is formed in the net-shaped section. The treatment efficiency is relatively high, the water pollution treatment structure is convenient to operate, the time and labor aresaved, energy does not need to be used, and the problem of secondary pollution and the like is avoided.

The invention discloses a technology for fermenting livestock manure and matched aquaculture water through engineering bacteria and algae. The technology comprises the following steps: (1) treating the livestock manure discharged from a livestock house to obtain a pretreated solution; (2) inoculating a first photosynthetic reactor containing a compound photosynthetic bacterial flora with the pretreated solution, and performing amplification culture to obtain a compound photosynthetic bacterial flora fermentation solution; pumping out the compound photosynthetic bacterial flora fermentation solution, dividing the compound photosynthetic bacterial flora fermentation solution into two parts, adding one part of the compound photosynthetic bacterial flora fermentation solution into an aquaculture pond, and adding the other part of the compound photosynthetic bacterial flora fermentation solution into a second photosynthetic reactor containing a compound algal flora for amplification culture; (3) performing amplification culture in the second photosynthetic reactor to obtain a compound algal flora fermentation solution; (4) pumping out 0.5-1.5% of water in the aquaculture pond first and then supplementing equal amount of the mixed fermentation solution into the aquaculture pond; (5) treating the water pumped out from the aquaculture pond, returning the water to the livestock house, and reusing the water as recycled water. The technology has the advantages as follows: the technology is applicable to large-scale disposal of the livestock manure, clear water is not required to be added for dilution, environmental requirements are met and the like.

The invention discloses microbial flocculant proteus vulgaris and an application thereof in cane juice clarification. A producing bacterium of a microbial flocculant is proteus vulgaris N-25 which has a collection number of CCTCC (China Center for Type Culture Collection) NO:M2014549 and is collected in the CCTCC on November 5, 2014. The application comprises the following steps: adding phosphoric acid into a cane mixed juice, adjusting the pH value to 6-8 by using lime milk, then heating to 50-70 DEG C, and preserving the heat; and adding sulfurous acid until the sulfur fumigation amount is 1.5-2.0g/L, adjusting the pH value to 7-9, then heating to 60-100 DEG C, adding the microbial flocculant, and standing for 20-40 minutes. The microbial flocculant disclosed by the invention is less in used amount and high in flocculation efficiency, is safe and nontoxic, is easy to degrade biologically, is applied to the sugar industry, and can be used for producing healthier and more environment-friendly products.

The invention discloses a synthesis method and an application of a low-phosphorous corrosion and scale inhibitor. Certain amounts of diethyl phosphite and diethyl maleate are added to a reaction kettle, a certain amount of a catalyst A is slowly dropwise added under the stirring condition that the revolving speed of a stirrer is 200 r/min, the mixture reacts for 1 h at 100 DEG C and then cooled to 50 DEG C, then a certain amount of ethyl acrylate is added, the mixture reacts for 8 h, a certain amount of a catalyst B is added to the reaction kettle, the mixture is heated to 80 DEG C for hydrolysis for 0.5 h, and a yellowish-brown viscous liquid, namely, PBTCA, is obtained. When the temperature of recirculating cooling water is 40 DEG C, the dosage is 5 g/m<3>, and the scale inhibiting ratio is up to 90.70%; when the dosage is 56 g/m<3>, the corrosion inhibiting ratio is up to 81.62%, and the corrosion rate is 0.110 mm/a and meets the requirement of being lower than 0.125 mm/a in the Code for Design of Industrial Recirculating Cooling Water Treatment (GB50050-2007).

The invention discloses a biological treatment method for removing dissolved cadmium in a water body. According to the method, flagellates are selected and have high endurance capacity and enrichment capacity on heavy metal cadmium, on the premise that dissolved cadmium in the water body is effectively adsorbed and enriched, rapid population growth can be achieved in a photoautotrophy or mixed nutrition mode, and therefore the removal capacity on the dissolved cadmium is further improved. On the basis of the core method, key technical parameters are improved and optimized aiming at the implementation of a technology for removing cadmium by utilizing flagellates with different nutrition modes, so that the application of the method in various water with different quality is facilitated. On the basis of safely and efficiently removing dissolved cadmium in the water body, the problems of secondary pollution and the like caused by a traditional cadmium removal method and the defect that other biological cadmium removal methods have high requirements on the environment can be effectively avoided.

The invention belongs to the technical field of aluminum alloy electroplating, and particularly relates to an environment-friendly silver plating process for plating the silver on the surface of an aluminum alloy once. The method specifically comprises the steps of surface polishing and smoothing, roughening treatment, hydroxylation treatment, KH580 surface modification and environment-friendly silver plating. According to the method, the silver layer is directly plated on the Al and Al alloy at a time, the silver layer is compact and is thin and uniform in thickness, the binding force betweenAg and Al is effectively improved, and the cost can be greatly reduced under the condition that the quality is not reduced. According to the present invention, from the perspective of environmental protection and the aspect of environmental sustainable development, the problems of environmental pollution and toxicity are solved because no cyaniding aqueous solution is used.

The invention discloses a steel ladle flow control device for preventing molten steel from solidifying, which comprises an upper nozzle fixed at the bottom of a steel ladle and a lower nozzle fixed on a lower sliding plate, and the upper surface of the lower sliding plate is connected to the bottom surface of the upper nozzle in a sliding manner, so that the lower nozzle can transversely move to be butted and communicated with the upper nozzle or be closed in a staggered manner with the upper nozzle. A pouring hole of the upper nozzle is in a horn shape with a large upper opening and a small lower opening, and the slope angle of the pouring hole is 50-80 degrees; the upper nozzle and the lower sliding plate are of hollow structures, heat insulation cavities are formed in the upper nozzle and the lower sliding plate, and the minimum thickness of the heat insulation cavities is not smaller than 20 mm. Molten steel enters the horn-opening-shaped steel ladle upper nozzle, the molten steel in the nozzle can be kept in a liquid state under the heat preservation effect of the upper nozzle and a heat insulation layer of the lower sliding plate and the supplement effect of heat of the high-temperature molten steel on the upper portion of the upper nozzle, and the problem that the molten steel is solidified to block the steel ladle nozzle, and finally the molten steel cannot be automatically cast is solved. And the problems of secondary pollution and the like caused by the use of the fire-resistant stuffing sand are avoided.

The invention belongs to the technical field of municipal sludge treatment, and particularly discloses road building slag taking municipal sludge as a raw material, a preparation method and application thereof. According to the invention, microorganisms subjected to enrichment culture are added into municipal sludge, and active thalli in the sludge are completely replaced by the microorganisms through a biological extraction reaction; the extraction microorganisms are mainly autotrophic bacteria, the sludge is mainly heterotrophic bacteria, the oxidation and acidification effects of the flora are utilized to condition the sludge, and the water content is reduced to the sludge treatment requirement after mechanical dehydration; and the slag is prepared by means of drying, calcining and the like and is used as a road building material, so that an efficient and economic new way is opened up for reduction, harmlessness and resourceful treatment of the municipal sludge and development of cheap road building materials.

The invention belongs to the field of environmental protection, particularly relates to a cyclic ecological environmental protection treatment process for forestry and agricultural organic wastes andflue gas, can solve the problem of treatment of forestry and agricultural organic wastes such as straws, provides a cheap and environment-friendly flue gas treatment method, and also provides a cheapraw material for producing carbon-based fertilizer. According to the technical scheme, forestry and agricultural organic waste is gasified and carbonized into biological activated carbon, the biological activated carbon is used for adsorbing harmful substances in flue gas after being pulverized, adsorbed materials and dust are used as carbon-based fertilizer raw materials after being collected, flue gas can be pretreated before adsorption, and adsorbed substances can be subjected to water flotation separation as required after being collected. Resource utilization of agricultural and forestryorganic waste such as straw is achieved, a cheap and environment-friendly flue gas treatment method is provided, the utilization rate of products is increased, the problems of secondary pollution andthe like caused by activated carbon after pollutants are adsorbed are avoided, and the carbon-based fertilizer prepared from the activated carbon adsorbing pollutants such as nitrate and sulfur can improve alkaline soil in the north.