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532results about How to "Improve environmental conditions" patented technology

Sewage treatment system and method for combined tidal flow artificial wetland

The invention discloses a sewage treatment system for combined tidal flow artificial wetland, belonging to the technical field of sewage treatment. The system comprises a non-powered automatic water charging device (9), an artificial wetland bed and a non-powered automatic water discharging device (2), wherein the non-powered automatic water charging device (9) is positioned above the artificial wetland bed and is communicated with the artificial wetland bed through a siphon water inlet pipe (10); the artificial wetland bed is provided with a water discharging layer (5), a denitrification reinforcing layer (7), a reinforcing reaeration layer (8) and an aerobic ecological sand layer (17) from the bottom up; and the non power automatic water discharging device (2) and the artificial wetlandbed form a connector and are connected with each other through the bottom water discharging layer (5). The invention further discloses a sewage treatment method using the system, comprising two stepsof waterflooding absorption and emptying reaeration. Compared with the traditional combined wetland, the sewage treatment system for the combined tidal flow artificial wetland increases daily sewage treatment amount and reduces construction cost.
Owner:CHINA AGRI UNIV

Sludge composting method

The invention provides a sludge composting method, and relates to a sludge treatment method which comprises the steps of preferable accessory selection, CK21 fungus spraying inoculation, heavy metal passivation and powder granulation, and then three-dimensional composite biological organic fertilizer with organic, inorganic and microbial active constituents is obtained. Mushroom compost and pig manure are used as accessories which are easily obtained and degraded, the stacker fermentation time is short, only one time of fermentation is needed, the C/N ratio can be effectively adjusted, and the water content of the sludge is reduced; and the efficient beneficial bio-fungus community CK21 is adopted. The microbial concentration is high, the secretion ability of the enzyme is strong, organic matters can be quickly decomposed so as to prevent the corruption of the organic matters, no odor exists, sludge is used for CK21 inoculation, fermentation starts fast, and the effect is good; and the product is inoculated with the CK21 fungus secondarily so as to further balance and activate nutrients, and the microbial natural reproduction is utilized to realize the is called flower dipping absorbing of the plants to nutrients. The invention has the advantages of optimizing the composting conditions, shortening the composting time, reducing energy consumption of turning, and reducing the damage of the heavy metal on the ecological environment.
Owner:厦门市政环境科技股份有限公司

Quick biological drying method for household garbage

The invention relates to a quick biological drying method for household garbage. The method comprises the following steps of: uniformly mixing the household garbage from which large impurities are screened out, a biological drying product of the garbage and broken straw, and stacking the mixture in a groove-type compost reactor; covering bundled straw cushions on the garbage surface; supplying enough oxygen to aerobic microorganisms by a timed ventilation method; and after the temperature of the stack reaches a high-temperature section (more than 55 DEG C), adopting a stack temperature feedback ventilation method to evaporate moisture by fully using heat generated by metabolism of the aerobic microorganisms, and bringing out steam by using sufficient ventilation flow to realize quick drying of the garbage. The dried garbage is separated and recycled or transported to an incineration plant for energy recovery. The method improves a lower heat value of the dried garbage by 100 percent and a separation rate by 140 percent, obviously improves household garbage incineration and separation recycling values, and can be widely applied to drying treatment of household garbage which contains 65 to 50 percent of moisture and in which biodegradable organisms account for 50 to 35 weight percent of dry matters.
Owner:TONGJI UNIV

Method for enhanced nitrogen removal of tidal flow-horizontal subsurface flow hybrid constructed wetland and system thereof

The invention belongs to the technical field of sewage treatment and specifically relates to a method for enhanced nitrogen removal of a tidal flow-horizontal subsurface flow hybrid constructed wetland and a system thereof. The system orderly comprises a non-powered automatic water intake device (8), a tidal-flow constructed wetland bed, a non-powered automatic water drainage device (2) and a horizontal subsurface-flow constructed wetland bed. The tidal-flow constructed wetland which is high in ammonia nitrogen oxidation effect and the horizontal subsurface-flow constructed wetland which is excellent in nitrate reduction capability are rationally combined into one system by thoroughly utilizing the characteristics of the aerobic environment of the former and the anaerobic environment of the latter; therefore, conditions are created for thorough nitration / denitrification; and simultaneously, a horizontal subsurface-flow wetland slow-release carbon source enhanced region (15) and a backflow well (19) are arranged in the horizontal subsurface-flow wetland bed, so that enhanced removal of total nitrogen in the sewage can be realized and secondary pollution on the carbon source is avoided at the same time.
Owner:CHINA AGRI UNIV

Double cropping rice nitrogen-saving high-yield production method

The invention relates to a double cropping rice nitrogen-saving high-yield production method. A double cropping rice planting region is selected; 15 to 30 days before late rice is harvested, astragalus sinicus planting is carried out; after the late rice is harvested, ditching is carried out according to an astragalus sinicus planting technology; 30 to 50kg of calcium magnesium phosphate fertilizer is applied per mu; 1 to 2kg of potassium chloride used as a base fertilizer is applied per mu; 10 to 15 days before early rice is transplanted, dry tillage and plowing pressing are carried out; land preparation is carried out according to the early rice planting requirements; azolla is bred; and after shoal water of field water, which has a height of 1.5 to 3.5cm, is kept for 8 to 10 days, the base fertilizer is applied to carry out early rice transplanting. During growth of the early rice and the late rice, duckweed utilization is naturally carried out; before the late rice is transplanted, a sustained-release nitrogen fertilizer is applied in one step as the base fertilizer; and on mid-to-late September in the next year, circulation operation of farming of planting astragalus sinicus green manure crops and the like is carried out. According to the invention, astragalus sinicus green manure is planted during the slack winter season of double cropping rice planting, the azolla is bred during growth of rice, the rice special sustained-release nitrogen fertilizer is applied to the late rice in a decreasing manner, the astragalus sinicus and the azolla are utilized to fix nitrogen and adsorb carbon, the land is maintained by the land, organic materials and an organic nitrogen source are provided for rice, nutritive substances in the double cropping rice field, which are easy to loss, are adsorbed, non-point source pollution is reduced and fertilizer supply and the fertilizer requirement of rice are coordinated and consistent.
Owner:CHANGSHA ENVIRONMENTAL PROTECTION COLLEGE +2

Multi-target operation scheduling method for micro-grid with electric vehicle hybrid energy storage system

The invention relates to a multi-target operation scheduling method for a micro-grid with an electric vehicle hybrid energy storage system. The micro-grid runs in a grid-connection mode and comprises a plurality of micro-sources and loads, wherein the loads include an electric load and a heat load; and the micro-sources include a micro-gas turbine, a fan, a photovoltaic cell, a fuel cell, a storage battery and an electric vehicle. The method comprises the following steps of S1: obtaining state information of each load and each micro-source in the micro-grid; S2: establishing a multi-target economic scheduling model with minimum running and pollutant control costs; S3: performing optimization solving on the multi-target economic scheduling model by adopting an NSGA-II multi-target optimization algorithm to obtain optimal active power of each micro-source; and S4: according to the optimal active power of each micro-source, controlling active power output of each micro-source. Compared with the prior art, the method has the advantages that the micro-grid consisting of a distributed power supply can run more economically, flexibly and environmentally, and the power generation advantage of the distributed power supply can be brought into full play.
Owner:SHANGHAI UNIVERSITY OF ELECTRIC POWER

Capped end polishing machine

The invention relates to a polishing machine, in particular to a capped end polishing machine for polishing capped ends, belonging to the field of mechanical equipment. The capped end polishing machine comprises a rail, a running mechanism capable of horizontally moving along the rail, a capped end rotation mechanism, an automatic lifting system and a polishing mechanism, wherein the capped end rotation mechanism for clamping a capped end and driving the capped end to rotate is arranged on one side of the rail; the automatic lifting system for driving the polishing mechanism to perform feed motion along the inner circular-arc face of the capped end comprises a cantilever mechanism and a balancing weight; one end of the cantilever mechanism is connected with the balancing weight, and the other end of the cantilever mechanism is fixed with the polishing mechanism; and the cantilever mechanism is fixed on the running mechanism through a supporting seat and is hinged with the supporting seat. The polishing machine disclosed by the invention has a reasonable structure and a high efficiency, is simple and convenient to operate, greatly improves the environmental condition for operators, has high polishing quality, and completely eliminates the defect that hand operation cannot ensure the uniformity of the smoothness of all surfaces.
Owner:ZHEJIANG KIN SHINE TECH

Wild rhinogobio ventralis continental rise pond net cage domestication method

The invention discloses a wild rhinogobio ventralis continental rise pond net cage domestication method. The method includes four key technical links of the link 1, domestication pond water quality cultivation and regulation and control, specifically, applying liquid state organic fertilizer, composite probiotics and bottom material improvers at regular intervals to carry out water quality cultivation and the regulation and control, the link 2, net case establishment, and specifically a net case is mainly composed of knotless netting and a stainless steel framework and meanwhile is provided with an aeration flow generating device, the link 3, polyculture of wild rhinogobio ventralis and megalobrama pellegrini, specifically, adopting the method that artificial culture breeds are cultured in a matched mode outside the net cage to carry out domestication of wild fishes, and the link 4, ingestion domestication, specifically, adopting the method of food calling first and domestication feeding second, namely, feeding biological baits first then gradually feeding artificial mixed feed. According to the method, domestication of the wild fishes is carried out in a manner that the flow generating type net case is erected in a continental rise pond, meanwhile, the technologies of the water quality regulation and control, polyculture and live bait food calling are utilized comprehensively, and therefore the adaptability of the wild fishes to the culture environment can be promoted, the survival rate of domestication can be improved, and the method has wide application prospect.
Owner:CHINESE STURGEON RES INST CHINA THREE GOR

Method and equipment for continuous smelting of lead sulphide concentrate

A lead sulfide ore concentrate continuous smelting method and equipment thereof are provided. The invention relates to a pyrometallurgical process of lead sulfide ore concentrate and the equipment adopted for realizing the process. In the device, a partition wall is arranged in the space above the liquid slag layer of the molten pool of the furnace body, which separates the device into three regions of an oxidation region, a reduction region and a fuming region that are not communicated. The top of every region is equipped with a flue gas outlet and is respectively equipped with a spray gun. A material smelting inlet is arranged on the top part of the oxidation region. A siphon discharging outlet is arranged on a crude lead layer on the bottom of the furnace body. A slag discharging outlet is arranged on the liquid slag layer of the fuming region. The smelting materials are continuously fed in the furnace from the top of the oxidation region. The liquid metal lead is continuously discharged out of the furnace from the siphon discharging outlet. SO2 obtained in the oxidation area is used for preparing sulfate acid. Valuable metal smoke dust such as high zinc that is obtained in the fuming region is reused. The invention has the advantages of short process line, fully utilization of slag heat, obvious energy saving effect, less investment in the metallurgical furnace equipment, low activity-based cost, small concentration fluctuation of SO2, cheap reducing agent and wide resources.
Owner:YUNNAN TIN GROUP HLDG
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