596 results about "Consumptive water use" patented technology

A treatment and reclaim method of single crystal silicon cutting waste liquid comprises the steps: (1). the waste liquid is treated with diluted hydrochloric acid then is stirred and mixed to enable the liquid to become a flowable mixture; (2). the mixed material is heated to separate solid and liquid, by which water and polyethylene glycol are extracted. The polyethylene glycol is obtained by the process of condensation, dehydration and recovery. The solid after being separated is a crude solid mixture of silicon carbide and silicon; (3). the quadratic-cleaning solid mixture of silicon diluted and silicon is obtained after quadratic cleaning to the crude solid mixture obtained in step 2; (4). the mixture is treated by mixed acid liquid comprising HNO3+HF to recover and get silicon diluted and silicon. The method has easy operation, simple equipment, low cost, high efficiency in treatment and recovery. The allover recovery rate calculated based on the weight of waste liquid can reach 26-46 percent and the recovering material can reach or close to the standard index, and can be directly used in solar energy battery production, so the invented method has good economic benefit and also can greatly contribute to environment protective, thereby having large exploration prospect.

The invention discloses an electric water heater with a water purifying function. The electric water heater comprises a heating device with a water inlet pipe and a water outlet pipe and further comprises a water purifying device arranged at the water inlet pipe position. The water purifying device comprises a main pipe and a side pipe which are communicated with the water inlet pipe. A purifying filter is arranged on the side pipe, one end of the main pipe is communicated with the side pipe through a water path reversing valve, or the main pipe and the side pipe are provided with water path switches respectively. The water purifying device is provided with two water flow channels, one of the two water flow channels is provided with the purifying filter, so that bathing water can be purified selectively. The heater can purify water effectively, delay water scale generating and guarantee that the bathing water is healthy and safe and is flexible. The service life of filter elements is effectively prolonged, and water purifying cost is reduced. The purifying device has a backwashing function and further guarantees filtering efficiency of the filter elements and water flow rate. A water purifying method of the electric water heater is further provided.

The invention discloses an intelligent electric cooker having a foodstuff freshness retaining function. The intelligent electric cooker refrigerates the to-be-cooked foodstuff, remains the to-be-cooked foodstuff to be fresh and enables the to-be-cooked foodstuff and cooking water to be stored separately. According to the intelligent electric cooker having the foodstuff freshness retaining function, a refrigerating circulating device which is arranged between the outer casing inner wall and the inner container outer wall can blow cold air into an inner container in a timing mode through a circulating pipeline; a water supply device which is arranged on an outer casing is connected with an exterior water supply pipe or a water storage bottle; the water supply device can quantitatively inject water into an inner container chamber in a timing mode; the foodstuff arranged inside the inner container is always in the refrigerating fresh retaining state before the cooker is started to cook; water is automatically quantitatively injects into the pot when cooking is required and then a master can instantly enjoy cooked fresh and delicious delicacies the moment getting home; an intelligent control circuit which comprises a manual circuit, an appointment control circuit and a wireless real-time control circuit is adopted, real intellectualization can be achieved due to cooking process updating which is performed according to requirements, and accordingly people can be freed from troublesome cooking housework and do not have to worry about having dishes cooked by stale foodstuff.

Described is a limited-demand water supply system for use in residential homes wherein a supply of water is automatically provided to fire sprinklers by means of air pressure. Multiple tanks or vessels in a connected fluid system are partially filled with water and then pressurized with air pressure provided by an air compressor. There is maintained sufficient air pressure to empty the water in the vessel system through the fire sprinkler heads, when open. Preferably, to efficiently comply with most current fire system regulations, a set of vessels of less than about 200 gallons capacity each is filled about two-thirds with water and then air-pressurized to about 150 pounds per square inch.

Hybrid hydroponic plant growing systems are designed specifically for urban home, community and small farm gardening without the need for arable soil or broadcast irrigation. The innovative hybrid hydroponic systems provide a “hybrid” growing environment including a limited, containerized amount of soil-like growing media combined with soluble fertilizer creating a hydroponic nutrient solution. The use of containerized growing media allows the units to be utilized regardless of the availability of arable soil, irrigation water, or runoff capacity. Multiple hydroponic techniques, such as drip system, nutrient wicking, ebb-and-flow, and / or deep water culture are combined to optimize plant nutrition at different stages of plant growth. Incremental fertilization, water monitoring, and drain systems are designed for easy use by non-professional gardeners. Water recirculation minimizes water use and fertilizer runoff. The units are easily adapted to solar and other off-grid power techniques.

A washing method without using washing agent, including quenching and tempering water so-called activation, then electrolysis, controling washing mechanical strength and time, pH of electrolysis water and altering quality of electrolysis water, brings into practical washing method without washing agent; according to this method, we can realize washing without washing agent, save cost and avoid washing pollution. At the same time, the tissue harden phenomenon is avoided because of quenching and tempering washing water.

The invention relates to a device for cultivating green crabs and a cultivating method thereof, relating to a cultivating device. The device and method can avoid fratricide and escape of the green crabs during cultivating, improve cultivating density greatly, cultivating survival rate and production rate in unit water area of the green crabs, and actually achieve three-dimensional water space using and three-dimensional cultivation of the green crabs. The device is provided with a cuboid reticular case, inside of which is provided with at least one clapboard transversely and one clapboard vertically. The cultivating method adopts grading stocking; water flow is set artificially; sweet dew is given at certain amount regularly; sterilization of spraying type is carried out for the green crabs and the cultivating device thereof. Sand filtration is processed for cultivating water; water temperature during cultivating period is kept at 19-32 DEG C, the salinity is 25-32, pH value is 7.5-8.5 and dissolved oxygen is larger than 3.0mg / L; throwing feeding is processed, that is, feed is thrown in each evening during the cultivating period.

The invention provides an on-line integrity test method of a filter. The method is characterized by: making an integrity test machine bypass form series connection with a compressed air pipe line of a sterilization filtration system comprising at least one sterilization filter so as to form a closed detection gas path; setting a liquid level induction meter on the top of the each sterilization filter so as to meter a water yield of the sterilization filter; after sterilization in place (SIP) is performed to the sterilization filtration system or the sterilization filtration system is used, injecting sterile compressed air so as to cool a filter core of the sterilization filter; then feeding water for injection at the temperature of 20-25 DEG C so as to carry out wetting; and then performing a routine bubbling point test, a diffusion flow test or a pressure maintenance test so as to perform the integrity detection of the filter core. Accuracy of the filter integrity test can be ensured. Aseptic production and real-time monitoring of medicine can be guaranteed and a production efficiency can be increased.

The invention discloses a novel water-saving water closet pan and mainly relates to the technical field of water closet pans. As for pedestal pans and squatting pans in modern urban families and public places, water consumption is high, the water waste is extremely serious, unclean flushing sometimes occurs, and unfavorable influences on public hygiene are caused. As for modern rural toilets, old open-type flushing-free toilets are dominant, environmental hygiene is extremely poor, and high water consumption of modern flushing water closet pans is greatly related to the phenomenon. A piston of the water closet pan can move relatively to a water closet pan port (the piston reaches the lower portion of the water closet pan port), human body excrement can be directly moved to a thick channel of the water closet pan to be rotated, the flushing water pressure of the water closet pan is high, therefore, a lot of water is saved, the flushing of the water closet pan is clean, a sewer is not prone to be blocked, a lower port of the water closet pan is sealed by the pistonto be isolated from outside space and a sewer lineeffects of air sealing are better than those of keeping water and sealing peculiar smell by drain traps in traditional water closet pans, meanwhile, collection and usage of human body excrement are facilitated, and the water content of the excrement is greatly reduced so that the collected substance content can be increased, and the workload is reduced.

The invention discloses a circulating zero-valent iron biofilter for strengthened treatment of rural domestic wastewater. The circulating zero-valent iron biofilter is structurally characterized in that a plurality of wastewater treatment units are arranged underground; the rural domestic wastewater is collected into the wastewater treatment units for circulating and strengthened treatment through a water pipeline system; the treated domestic wastewater is used as agricultural irrigation water or for supplementing groundwater or is directly discharged into a river; each wastewater treatment unit comprises a pretreatment pool, a circulating pool and a zero-valent iron biofilter; and the treatment units are structurally independent of one another and communicate through pipes. The circulating zero-valent iron biofilter has the advantages of low maintenance, low energy consumption, water quality impact resistance and high wastewater treatment efficiency; the advantages of intensive and ecological technical routes are coupled through only one pump, complicated drainage conditions of rural areas are coped with easily and the stability of effluent quality is ensured; and meanwhile, surface land resources are saved and the circulating zero-valent iron biofilter is simple and applicable, and is convenient to operate and manage and low in cost.

The invention discloses a water heater which comprises a water inlet pipeline and a water outlet pipeline. The water inlet pipeline and / or the water outlet pipeline are / is provided with a first ultraviolet sterilization device and the water inlet pipeline or the water outlet pipeline is further provided with a water quality detection device used for detecting outflow water quality. The water heater further comprises an ultraviolet sterilization control circuit respectively and electrically connected with the first ultraviolet sterilization device and the water quality detection device. The ultraviolet sterilization control circuit is used for receiving water quality information fed back by the water quality detection device in real time or in a regular mode and according to the received water quality information, the first ultraviolet sterilization device is correspondingly controlled to generate ultraviolet rays. The invention further discloses a method for controlling ultraviolet sterilization of the water heater. Thus, the ultraviolet rays can be selectively generated according to the water quality conditions, poor-quality water for a bath is sterilized through the ultraviolet rays, damage caused by unclean water to health of the human body is avoided, in addition, the water quality is guaranteed, the service life of the ultraviolet sterilization device is prolonged, and energy is saved.

The invention discloses a wastewater treatment process of a flat membrane bioreactor and reverse osmosis comprehensive membrane integrated system, which comprises the following steps of: carrying out aerobic biochemical treatment or anoxic and aerobic combined biochemical treatment on pretreated textile wastewater; then charging the wastewater into a membrane bioreactor adopting a flat type polyvinylidene fluoride membrane module for treating; and carrying out reverse osmosis treatment on the produced water of the membrane bioreactor by a brackish water reverse osmosis membrane. The treated water obtained after treating the textile wastewater by the invention has the total hardness of lower than 0.2ppmas CaCO3 and the conductivity of 10-200uS / cm. The produced water meets the recycling requirement on factory water and can be used as industrial water. The process solves the problems of special substance, higher-dissolubility solid concentration, organic matter concentration, large chemical component fluctuation, and the like in textile wastewater, the treated water quality is stable and reliable, and the operations of membrane cleaning, and the like are simple and easy.

The invention relates to a comprehensive processing technique of culturing farm cow dung waste water, and relates to the technical field of culturing farm waste processing. The processing process comprises the following steps: (1) liquid and solid parts of fresh cow dung water are separated primarily by a grating; (2) suspended impurities in the cow dung waste water are removed by further centrifuge and air-float; (3) organic pollutant and major part of nitrogen and phosphor compound are removed by using anaerobes and aerobes after the suspended impurities are removed; (4) biogas produced during the anaerobic treatment is purified to generate electricity, and residual heat from electricity generation is recycled; (5) microbe sludge produced during aerobic treatment is dehydrated and is decomposed; (6) the water, from which the organic compounds and the nitrogen and phosphor compounds are removed, is disinfected and then supplied to the breeding farm to flush cowhouse and irrigate the nearby farm land. The electricity generated in the comprehensive processing process can meet the requirement of a breeding farm; high quality organic fertilizer is produced; the comprehensive processing process needs small areas for processing cow dung; the utilization of waste as resource and harmlessness and zero emission are realized during the processing process.

A covering material for the garden or park to shield to exposed ground is prepared from natural biological material (such as tree twigs, straw, stalk, etc) through mixing with pigment, slow-releasing fertilizer and water preserving agent, and shaping to become flakes, small blocks, or particles. It can be spread on the exposed ground in garden or park for beautifying environment, providing fertilizer to trees or other plant, and preserving soil moisture.

The present invention discloses a grouper factory culturing method comprising the following steps: (1) Treatment water for culture: disinfecting and sterilizing culturation water by ozone and ultraviolet radiation, then filtering and detecting and controlling water quality; (2) Selection fry: selecting 12 to 15cm grouper fry without nervous necrosis virus; (3) Culturation for grouper: To discharge culturation water qualified by detected into culture pond, to stock the selected fry into pond, to control the content of dissolved oxygen, ammonia nitrogen, nitrite and bacterial in pond, and to control culture density and PH of culture water, to feed everyday; (4) During culturing procession to recycle treatment culture water, that is to separate protein for culture water, after disinfecting and sterilizing by ozone and ultraviolet radiation to process biological nitrification, and then filtering so as to renew culture water; (5) Pollution absorption, washing pond bottom and changing water each day, keeping pond wall and pond bottom cleaning. This method has high efficiency and environment protecting, using this method to produce grouper having good quality, high yield, health and high survival rate, lower feed coefficient.

The invention discloses an ecological corridor for removing nitrogen and phosphorus of micro-polluted river water and a construction method thereof, which belong to the field of river water pollution treatment. The ecological corridor is positioned in a pond with an area of over 4,000m<2>; two or more parallel flow guide dams are formed along the length direction of the pond; adjacent flow guide dams are opposite to each other; the length of the flow guide dam is at least three fourths the length of the pond; a flow guide corridor is formed between the flow guide dam and a shore side and between the flow guide dams; floating plants or a fixed ecological floating bed is arranged in the flow guide corridor; and the water surface coverage of the ecological floating bed is 10 to 20 percent. The flow guide corridor is constructed by establishing the flow guide dam and the ecological corridor is constructed by arranging the ecological floating bed. The water quality index of most of the micro-polluted river water treated by the ecological corridor can reach and exceed the IV-V class standard in the national surface water quality standard (GB2002-3838). The purified water body finally flows out through an overflow outlet at the rear end of the system and used for fishery, landscapes, agricultural irrigation water and the like.

The invention discloses a fore-reservoir system driven by natural energy in lake outlet regions, belonging to the field of fore-reservoirs. The fore-reservoir system comprises five units: a water diversion storage buffer area, an ecological interception and sedimentation area, an intensifying and purifying area, a deep purification area and an ecological stable area. The fore-reservoir system disclosed by the invention solves the problem of power needed by the water inflow, intensification and purification of reservoir areas by adopting a wind energy and solar energy driving technology and enhances the treatment efficiency of the five units through the link-by-link purification and the step-by-step interception of the five units, thereby achieving the final reduction of pollutants entering lakes; the fore-reservoir system disclosed by the invention can finally realize the target of removing 30 percent of TN (Total Nitrogen), TP (Total Phosphorus) and COD (Chemical Oxygen Demand) loads through the combined action of the five units; most water quality indexes can achieve and be superior to an IV-V class standard of the national surface water environmental quality standard after treatment; outflow water treated by the fore-reservoir system can be used as water for fishery, landscape, agricultural irrigation, and the like; and in addition, the invention can provide a scientific, effective and referable technology for fore-reservoir construction, the reduction of pollution loads entering the lakes and lake eutrophication control in the lake outlet regions.

The invention relates to a full-automatic addictive-free clean and sanitary closestool capable of saving a large amount of water, which converts human gravity into power, and automatically flushes after the human excretion. According to the closestool, a piston is arranged at the lower opening of the closestool to isolate the outlets of sewage and the like, and the air sealing effect is better than the effect of the conventional closestool depending on the water trap to store water for sealing odor. The piston of the closestool can move downward, so as to directly transfer the human excrement to a closestool passage to be rotated, and as the flushing water pressure of the closestool is higher, a large amount of water is saved, and with the quantitative water spraying after the urination according to the set time, much more water is saved; the closestool is provided with a toilet paper shredder, so as to avoid the problem of sewage blockage; and an electronic scale can also be mounted on the closestool as required.

A hot water supply system special for a bathing pool and capable of recycling heat energy comprises a hot water tank, a sewage source heat pump unit, a sewage pool, a sewage heat exchanger and a hot water variable frequency pump. Waste water in the bathing pool after a bath is collected in the sewage pool through a waste water drainage ditch. The sewage heat exchanger is arranged in the sewage pool. The temperature of a low-temperature secondary refrigerant is increased after heat of the waste water is absorbed by the low-temperature secondary refrigerant circulating in the sewage heat exchanger, and the heat is released to a refrigerant in the heat pump unit through an evaporator of the heat pump unit. The heat, containing heat energy generated by the heat pump unit due to electricity consumption in the running process, in the refrigerant is all transmitted into water for washing through a compressor and a condenser, and then high-temperature water for the bath is obtained and enters a hot water pool through a pipeline. The hot water in the hot water pool is sent into the bathing pool for the bath through the hot water variable frequency pump, and therefore recycling of the heat is realized. According to the hot water supply system special for the bathing pool and capable of recycling the heat energy, 80% of the heat of the hot water for the bath comes from recovery by a heat pump, and meanwhile, the waste water is discharged after the temperature of the waste water is lowered to about 5 DEG C so that thermal pollution is avoided. The hot water supply system special for the bathing pool and capable of recycling the heat energy is high in energy efficiency ratio, energy saving, environmental friendly and practical.

The invention relates to a method for culturing organic Chinese chives, and belongs to olericulture. The method comprises the following farming methods and management steps of: a, preprocessing cultivated soil; b, selecting a microbial organic fertilizer as a fertilizer; c, using groundwater from a deep well below 60m or natural spring water as irrigation water; d, preventing and controlling pests by using pesticides without toxic or side effect; and e, arranging a castor bean planting isolating band area around the organic Chinese chives planting garden. The method for culturing the organic Chinese chives has the advantages of meeting the growth requirements of the Chinese chives and having high yield due to comprehensive fertilizer efficiency and nutrient components, effectively preventing and controlling the pests, keeping ecological balance of the soil, contributing to environmental protection, and avoiding various negative effects caused by overuse of chemical fertilizers and pesticides; and the produced Chinese chives meet the technical requirements of pollution-free food Chinese chives and meet the requirements of PRC national standard GB / T 19630.1-2005.

The invention provides a water transport and distribution pipe network water quality detection system comprising a water quality blending module, a water transport and distribution pipe network simulating module, a power module, a control and metering module, and a control unit. The water quality blending module is used for blending test water with different water quality parameters. The water transport and distribution pipe network simulating module simulates water supply pipelines of a water supply network, and comprises water pipelines, water values, butterfly valves, and detection ports, wherein the water values, the butterfly valves, and the detection ports are arranged on the water pipelines, and the water pipelines are totally enclosed and are distributed in a symmetric dual-snakelike shape. The power module is used for controlling the water speed and the water pressure of the water transport and distribution pipe network simulating module. The control and metering module comprises a water quality parameter data acquisition device and is connected with the detection ports in order to detect the water quality parameters of the water in the water pipeline. The control unit, according to the water quality parameter data monitored by the water quality parameter data acquisition device, controls the water quality blending module to blend test water with a water quality characteristic close to that of finished water or water transported and distributed in the pipe network. The power module performs control in order that the test water cycles in the water pipeline according to set pressure and flow and the test water is regularly sampled and detected.

The invention discloses a semi-solid non-tillage dry direct planting method for multi-cropping type paddy rice. The semi-solid non-tillage dry direct planting method comprises the following steps of S1, keeping water layers, of which the depths are 1cm-5cm, in ditches before previous crops are harvested, and paving and spreading straws after the harvesting of the previous crops on ditch surfaces to form rhizospheric layers of paddy rice seeds; S2, applying base fertilizer on the ditch surfaces on which the straws are paved and spread, and cleaning the ditches; S3, applying the paddy rice seeds on the ditch surfaces, mixing soaked paddy rice seeds with semi-solid biomass materials before seeding, wherein the mixed mass ratio between the paddy rice seeds and the semi-solid biomass materials is (1-6):(90-150); S4, continuously keeping a dry state of the ditch surfaces for 3-7 days without irrigating water after the seeding. According to the semi-solid non-tillage dry direct planting method disclosed by the invention, three-free effects of no tillage and no burning on the straws of the previous crops and no irrigation of field-steeping water are realized, and the ecological benefit is obvious; the working energy consumption is reduced, pesticide is not used for cleaning stubbles, haze is reduced, and irrigation water is reduced.

The invention discloses an environmentally-friendly method for additionally supplying water and power for a building and a system. The environmentally-friendly method for additionally supplying water and power for the building is characterized in that the rain is collected by a roof and is gathered into a reservoir via a rain pipe network; then the rain overflows into an electrochemical reaction rain pool via an overflow pipe; continuous rain flow pushes a hydraulic turbine generator to generate power; the tail water is discharged into a water storage pond via a water outlet pipeline; the building roof is provided with a wind driven generator and a solar cell panel; the wind driven generator, the solar cell panel and the output circuit of the hydraulic turbine generator are connected into a power distribution unit for complementary power generation; the power generation energy is stored in the storage cell used for processing rain quality; additional power supply is carried out to a user under the condition of abundant power energy; the rain in the reservoir and the water storage pool is used for supplementing common domestic water; and the rain in the electrochemical reaction rain pool is used for supplementing the domestic drinking water. The environmentally-friendly water supplementation and supply system has the advantages of environment protection, simple structure, investment saving, obvious economic and social benefit and has a good research and popularization value on the background of energy saving, emission reduction and water resource crisis.

The invention relates to a rainwater penetration collection device based on concrete-sand-based water-permeable bricks. The invention belongs to the field of construction design. The invention is characterized in that: pedestrian walkways and squares are paved by using concrete-sand-based water-permeable bricks; rainwater enters the concrete-sand-based pavement water-permeable bricks and cover-plate water-permeable bricks, and is filtered by a gravel bedding layer and a crushed stone bedding layer; rainwater enters a rainwater collection ditch through the water-permeable bricks of a ditch wall of a rainwater-collection thin ditch side wall; the rainwater is then gathered to a water storage tank on the square and is used as a landscape or used for irrigation. The device is characterized in that screened and processed desert sand is used as a main aggregate; high-grade cement is adopted as an adhesive; and proper additives are added. Frustum-shaped water-permeation holes are provided on brick bodies, and anti-slip stripes are arranged on the brick body. The device provided by the invention has the advantages that: desert sand is sufficiently utilized; the strength is high, and cost is low; the water permeability is good, and the water-permeation holes are prevented from blockage; the device is safe and comfortable; a good rainwater collection plane which is the square is sufficiently utilized; and rainwater processing is simple and feasible.

The invention relates to a method for improving the survival rate of rice field eels in the transportation process and belongs to the technical field of fish culture. The method comprises the following steps: (1) temporary culture of the rice field eels, i.e. transferring the rice field eels to be transported into a temporary culture net cage to carry out temporary culture for one day, stopping feeding and placing few loaches into the temporary culture net cage; (2) preparation and bagging of water for transportation, i.e. dissolving vitamin C and astragalus polysaccharides in water, wherein the vitamin C being added is in an amount of 10g / m3, and the astragalus polysaccharides being added are in an amount of 3g / m3, simultaneously regulating the pH value into 7.0 to 7.5, placing the rice field eels and the water for transportation into a special oxygen bag for aquatic products according to a ratio of 1:1, filling oxygen and sealing, wherein the oxygen content is 6mg / L; and (3) the transportation of the rice field eels, wherein the water is changed for once at intervals of 6 hours in the transportation process so as to ensure that the dissolved oxygen content of the water in the bag is always over 6mg / L and ensure that the pH value is always in the range of 7.0 to 7.5. According to the invention, the vitamin C and the astragalus polysaccharides are added into the water for transportation of the rice field eels, so that the anti-stress capacity of the rice field eels is improved, the stress response, the injury and the death of the rice field eels in the transportation process are effectively avoided, the survival rate of the rice field eels in the transportation process is successfully improved, and a reliable transportation technology is provided for solving the problem of a rice field eel artificial propagation technology and improving the economic benefit of the rice field eels.

The invention discloses a novel ecological breeding community with circulating flow water in a pond. The novel ecological breeding community with circulating flow water in the pond is characterized inthat the novel ecological breeding community comprises a breeding area for aquaculture, an ecological purification area for purifying aquaculture water, and a control area for monitoring water quality of the aquaculture water, wherein the ecological purification area comprises a primary utilization area, a fruit and vegetable purification area, a biological purification area and a deep water area, and the control area comprises an office area and a management room which is set near the breeding area; the breeding area and the ecological purification area are laid out in a way that water flowsin a circular runway; the primary utilization area, the deep water area and the biological purification area in the ecological purification area are sequentially arranged along the circular runway; the fruit and vegetable purification area is arranged in a straight line in the middle of the circular runway. Further provided is a method for a novel ecological breeding with circulating flow water in the pond. The novel ecological breeding community with circulating flow water in the pond and the method for the novel ecological breeding have the advantages of realizing water recycling, reducingfeed coefficient, allowing ecological breeding of various products such as fish, aquatic plants and vegetables, and ensuring greenness, environmental protection, energy saving and emission reduction,and high breeding efficiency.

The invention discloses a three-dimensional greening system for urban buildings. Rainwater is collected from a roof greening module and an outer wall greening module to a ground greening module and then flows into a water storage tank, the rainwater purified by a water purification unit meets the municipal miscellaneous water quality standard, the rainwater supplies water to the roof greening module and / or the outer wall greening module and supplements water to municipal miscellaneous water through a centrifugal pump and via a recycling pipeline to achieve the resource utilization of the rainwater and sludge. The three-dimensional greening system for the urban buildings has the advantages that the urban building roofs, wall surfaces and ground space are fully utilized to form the three-dimensional greening system, which not only improves and optimizes the urban ecology, and creates a comfortable working and living environment for the inner portions of the buildings, but also can collect, purify and recycle the rainwater, thereby reducing the urban runoff volume, relieving the pressure of an urban rainwater pipe network, reducing internal waterlogging disaster risks, and achieving the resource utilization of the rainwater.

The invention relates to a rapid detection kit of nitrite nitrogen in aquiculture water. The kit internally comprises one 10 mL stoppered cuvette, one colorimetric card, one suction pipe, two 20 mL dropping bottles, 20 mL of reagent A and 20 mL of reagent B. The detection method using the kit comprises the following specific operation steps of: (1) washing the cuvette 2-3 times with the water to be detected; (2) sampling 5 mL of water sample, adding 5 drops of the reagent A, then adding 5 drops of reagent B and uniformly shaking; and (3) covering the cuvette, lightly shaking, standing for 1-3 minutes, closing the cuvette to the blank of the colorimetric card, and comparing the color of the liquid in the cuvette with the color of the colorimetric card to obtain the content (mg / L) of nitrite nitrogen in the detected water sample. According to the invention, the content of nitrite nitrogen in the water sample to be detected is displayed by a developing agent, thus the rapid detection kit has the characteristics of being accurate, rapid, convenient, inexpensive and the like, does not need for any equipment, and adopts a counting drop method to measure; and is used for field rapid detection of water quality of aquiculture water, domestic sewage, industrial wastewater and the like, the rapid detection kit is very simple in use method.

The invention relates to a roof greening pond with convenience for rain collection and belongs to the auxiliary facility field of buildings, more particularly to a greening facility placed on the top of the building. The roof greening pond comprises pond walls and a planting pond enclosed by pond walls. The invention is characterized in that a flexible water-permeable pipe is placed at the bottom of the planting pond; a water-retention material layer, an expanded perlite layer and a planting soil layer are placed in sequence at the bottom of the planting pond; PVC water pipes used as water inlet and water outlet respectively are connected with the two ends of the flexible water-permeable pipe; the ports of the water inlet and water outlet are positioned on the pond wall 50-200 mm away from the ground; and the thickness of the water-retention material layer is equal to the altitude of the water outlet. The roof greening pond has the advantages of simple structure, no need of drainage and filtration equipment special for rain collection, long irrigation cycle, minimized consumption of irrigation water, and long-term stability in water demand for the greening pond.

The invention discloses a method of cultivating rice by layer construction and utilization of straw and soil and solves the problems of crop stalk returning, soil aeration and water-fertilizer coupling. The method includes the steps of 1, performing a bed-furrow project on a rice field for the whole year; 2, performing moisture management before each season of crop harvesting; 3, treating stalks of crops of each season; 4, clearing beds and furrows and spreading soil; 5, planting crops; 6, performing field management; 7, harvesting the crops. The method has the advantages that the soil arable layer structure is changed, and a mud layer, a straw layer and a soil layer are formed from top to bottom; the method is good for deeply placing chemical fertilizers and improving availability of the fertilizers; water content of bed soil is decreased, soil aeration is improved, and availability of natural rainfall is improved; the rice field production process is free of tillage, straw burning and field steeping, ecological benefits are significant, operational energy consumption is reduced, haze is decreased, and irrigation water is decreased.