34results about How to "Sufficient carbon source" patented technology

The invention discloses a fully-biodegradable slow-release solid carbon source capable of being directly released and a preparation method and application of the fully-biodegradable slow-release solidcarbon source, and relates to the technical field of sewage treatment. The problems of difficult release, a low utilization rate, pollution in the slow release process and a complicated manufacturingprocess of existing slow-release carbon sources are solved. The slow-release solid carbon source is prepared through coating of a biodegradable solid carbon source by using a biodegradable material,and the biodegradable material comprises a biodegradable cotton web and biodegradable non-woven fabric covering the cotton web; the weight of the biodegradable solid carbon source accounts for 90% orabove of the total weight of the slow-release solid carbon source, and includes a carbon source matrix and a binder, and the carbon source matrix is prepared through compounding of a short-chain carbon source, a cellulose material, artificial degradable nanofiber spinning filament, microbial prebiotic factor sulfate and vitamins. The slow-release solid carbon source has the advantages of low production cost, environmental friendliness, no pollution and the like, and when the slow-release solid carbon source is used as a slow-release carbon source for biological denitrification in a sewage treatment process, the carbon source can be released stably in a short period of time.

A select method for strain preventing and curing endotrophic mycorrhiza in potato. Detect width of bacteriostasis braid and select strains with good effects of endotrophic mycorrhiza, do pot incubation test and field practice, detect effects of prevention and cure and fix planting ability. Detect action of the strain to pathogenetic fungi, and induct antiviral ability to potato. Advanced strain is obtained after the steps.

The invention relates to a chopped carbon fiber toughened silicon carbide composite material and a preparation method thereof. The preparation method comprises the following steps of: reacting chopped carbon fibers with a silane coupling agent, absolute ethyl alcohol and deionized water to obtain coupling agent grafted chopped carbon fibers; mixing the coupling agent grafted chopped carbon fibers with an organic solution of a high-carbon-residual-rate binder to obtain high-carbon-residual-rate binder coated chopped carbon fibers; mixing the high-carbon-residual-rate binder coated chopped carbon fibers with silicon carbide powder to obtain mixed powder; performing dry pressing on the mixed powder to obtain a biscuit, and performing degreasing treatment to obtain a preform; and carrying out reactive infiltration on the preform to obtain the chopped carbon fiber toughened silicon carbide composite material.

Belonging to the field of superhard material synthesis technology and special new material preparation technology, the invention discloses a preparation method of an artificial diamond synthetic column. The method includes: mixing catalyst powder with high concentration dust, then performing spheroidizing by a shaping machine to press or embed high concentration dust particles into the surfaces ofcatalyst particles; mixing the spheroidized catalyst powder with graphite powder to form graphite coated composite catalyst particles; adding graphite powder into the composite catalyst particles again, and mixing the substances evenly by a three-dimensional mixer; selecting a die for pressing into a synthetic column by a four-column press; and subjecting the synthetic column to vacuum heat treatment, then conducting secondary pressing and shaping, and then performing assembly to obtain a synthetic unit. The artificial diamond synthesized from the synthetic column prepared by the method has the advantages of complete crystal form, uniform growth, fewer twin crystal and high grade.

The invention discloses a planting method for improving vegetable, melon and fruit quality. The method comprises steps of seed soaking in a plant probiotic liquid and germination accelerating, fertilization, disease and insect pest prevention and control, and the like; the fertilization comprises base fertilizer application, top dressing, field planting fertilizer application and leaf surface spraying; and applied fertilizer is mainly ecological organic fertilizer, biological green fertilizer and the plant probiotic liquid. According to the invention, the biological green fertilizer and the ecological organic fertilizer employed in the invention provide comprehensive nutrients required in plant growth, photosynthesis and nutrient synthesis are promoted, the contents of dry matter, soluble solidified substances, amino acids, vitamins and the like in fruit and vegetable products can be increased, mouth feel of agricultural products is improved, probiotics can effectively inhibit reproduction and growth of harmful microorganisms and germs, reduce soil-borne diseases, eliminate continuous cropping obstacles, reinforces plant resistance, promote reproduction of phosphate solubilizing bacteria, potassium solubilizing bacteria and nitrogen-fixing bacteria, and improve soil nutrient activity and supply; and nutrients are comprehensive and balanced, and exert a synergic effect, and yield increasing rates of economic crops such as fruits and vegetables are 20-50%.

The invention relates to the technical field of sewage treatment and resource recycling, in particular to a device for recovering nitrogen, phosphorus and organic matter resources in sewage. The device mainly comprises filter cloth, a biological film, a light source, a rotating shaft, a scraper, a curtain and an air storage tank, wherein the filter cloth is connected into a whole end to end and issupported by the rotating shaft; the filter cloth is distributed in a wave form in the horizontal direction, and the wave-shaped bottom is positioned in water; the scraper is correspondingly arrangedon the surface of the filter cloth; CO2 is injected into a closed space formed by the filter cloth and the curtain. The biological film is periodically soaked in water and exposed in air, so as to transfer the nitrogen, phosphorus and organic matters in the water into the biological film by utilizing the surface adsorption/absorption effect of the biological film in the water and by virtue of photosynthesis in air. By supplementing the light source and injecting the CO2, the photosynthetic efficiency of algae and the like in the biological film is enhanced and improved. Eutrophication causedby sewage is solved, resource recycling of the nitrogen, phosphorus and organic matters is realized, and the process is simple, stable, reliable and efficient in operation.

The invention relates to a botanical filler constructed subsurface wetland constructing and running method. The method solves the problems of difficulty in carbon source feeding and difficulty in cost control of present constructed wetlands, and has the advantages of low cost and sufficient carbon source. A constructed subsurface wetland construction part comprises a filler bed and a matrix filled in the filler bed, one side of the filler bed communicates with a water inlet pipe, and the other side of the filler bed communicates with a water outlet pipe; and the matrix sequentially comprises a lower gravel layer, a botanical layer, an upper gravel layer and a sandy soil layer from bottom to top, and wetland plants are planted on the sandy soil layers.

The invention discloses a process for treating domestic sewage in high and cold areas and discloses a device of the process. The process comprises the following steps: (1) sewage continuously flows into an anaerobic zone in an oxidation ditch and sequentially flows through an anoxic zone, an aerobic zone and a settling zone to be discharged, wherein a filler zone of a culture is arranged in the aerobic zone and the flow rate of sewage in the oxidation ditch is less than 0.15 m/s; aeration is carried out on sewage in the anoxic zone, the aerobic zone and the filler zone; and (2) sewage at the tail end of the aerobic zone returns to the anoxic zone; sewage in the settling zone partially returns to the anaerobic zone and the rest of sludge is discharged. The process and device disclosed by the invention are applicable to sewage treatment in high and cold areas and have the advantages of being simple in water treatment process, low in treatment cost, low in energy consumption, small in occupied area, excellent in treatment effect and the like.

The invention belongs to a method for efficiently treating coal gasification wastewater in a biochemical mode. Specifically, a logical sequence of units in a conventional A2O2 process is re-arranged according to pollutant removal characteristics; reaction conditions are improved, removal efficiency, on a respective specific pollutant, of each unit is improved, efficient removal of the pollutants in wastewater is realized by a system, and water quality of outlet water is improved.

The invention discloses a nitrogen and phosphorus removal treatment system and method for low-carbon-nitrogen-ratio municipal wastewater. The system comprises an anaerobic tank and an anoxic tank, water inlets of the anaerobic tank and the anoxic tank are both connected with a wastewater inflow pipeline of the system, and water outlets of the anaerobic tank and the anoxic tank are connected with a water inlet of an aerobic reaction tank through pipelines; the bottom of the aerobic reaction tank is provided with sludge mixed liquor reflux pipelines respectively connected with water inlets of the anaerobic tank and the anoxic tank; the bottom of the aerobic reaction tank is provided with a compressed air inlet pipe, an MBR (membrane bioreactor) separation membrane is further arranged in the aerobic reaction tank, and a water outlet of the MBR separation membrane is connected with a water outlet pipe of the system. The system and method is low in cost, good in water treatment effect, high in removal rate of nitrogen, phosphorus and organic matters in the low-carbon-nitrogen-ratio wastewater, and less in surplus sludge amount.

The invention discloses a backwashable constructed wetland. The backwashable constructed wetland includes a plurality of ecological tank bodies which are sequentially arranged, and every ecological tank body includes an external supporting box and an internal biochemical floater; the bottom of the supporting box is provided with a water inlet and a water outlet, and the depth of the biochemical floater buried in water is adjusted by the water storage in the supporting box; and a plurality of filler layers are arranged in the biochemical floater, and plants are planted on the first filler layer at the top. An ecosystem constructed in the filler layers is used to realize sewage purification, nitrogen removal and phosphorus removal. The aerobic environment of the first filler layer improvesthe degradation ability of microorganisms; iron-carbon gel balls in the second filler layer provide a sufficient space for the loading of the microorganisms, and the iron-carbon micro-electrolyzes tomake chains of a large number of macromolecular organic pollutants broken in order to improve the biodegradability; and porous carbon release broken stones provide a sufficient carbon source for the microorganisms. The height of the biochemical floater is adjusted by the water storage in the supporting box to achieve the functions of drop aeration, washing and backwashing under normal operation conditions, so the backwashable constructed wetland has a strong practicability and a wide applicability.

The invention provides a treatment method of nitrochlorobenzene wastewater. The method comprises the following steps: after synergistic oxidation of ozone and hydrogen peroxide, filtering out solid insoluble substances through an ultrafiltration system; separating the ultrafiltration effluent into nanofiltration concentrated water and nanofiltration fresh water under the selective permeation action of a nanofiltration membrane of the nanofiltration system; evaporating the nanofiltration concentrated water through an MVR (mechanical vapor recompression) system to obtain high-content sodium sulfate; after the nanofiltration fresh water is diluted, adding a carbon source and a denitrification strain for denitrification, and subjecting the denitrification effluent to biochemical treatment to form the qualified wastewater. Herein, electrodialysis is not used for concentration, loss of an electrodialysis membrane assembly is avoided, sodium nitrate is removed through denitrification, the problem that the hazardous waste treatment cost is high is solved, the problem that the content of sodium sulfate concentrated by MVR is low is solved through nanofiltration, the sodium nitrate aqueous solution is not concentrated, and pipeline blockage is avoided; according to the technical scheme, the treatment cost is low, hazardous waste is not generated, the process continuity is good, the effect is excellent in the actual operation process, and the method is suitable for application and popularization.

The invention discloses a microecological preparation for purifying aquaculture tail water, and relates to the technical field of biological preparations. The compound microbial agent is prepared from the following raw materials in parts by weight: 50-80 parts of an EM microbial agent and 50-100 parts of a nutritional agent, wherein the EM microbial agent is prepared from the following microbial agents in parts by weight: 40 to 50 parts of an acetobacter aceti agent, 10 to 15 parts of a bacillus agent and 10 to 20 parts of a nitrifying bacteria agent; the microecological preparation provided by the invention is safe and environment-friendly, can reduce organic matters in aquaculture water, greatly reduce the content of ammonia nitrogen, nitrite and hydrogen sulfide and chemical oxygen consumption of sludge at the bottom of a pond, effectively improves the water environment of aquaculture tail water on the premise of considering the preparation cost, can be recycled, and is beneficial to environmental protection. The material circulation in the water body is promoted.

The invention belongs to the technical field of diamond synthesis, and particularly relates to grooved-surface diamond. Catalyst alloy powder for synthesizing the grooved-surface diamond is composed of, by mass, 79-82.5% of iron, 10-12.5% of copper, 2.5-4.5% of manganese, 1.0-1.6% of chromium, 1.0-1.6% of niobium and 3.0-4.8% of cobalt. A preparation of the grooved-surface diamond mainly includes:preparing the catalyst alloy powder, mixing materials to prepare a graphite column, sintering the graphite column, treating the surface of the graphite column, and synthesizing at high temperature and high pressure. The grooved-surface diamond is coarse in surface and higher in self sharpness and wear resistance; diamond tools made of the grooved-surface diamond are suitable for high-load work; the grooved-surface diamond has a knife-grain-shaped coarse surface, so that favorable conditions are provided for chemical plating or electroplating.

The invention discloses a hollow Fe2O3 coated carbon catalyst as well as a preparation method and application thereof. The preparation method comprises the steps of mixing hollow Fe2O3 microspheres and MOF material raw materials, then centrifugally washing and drying, then adding the mixture into a saccharide solution to be subjected to a hydrothermal reaction, obtaining a hollow Fe2O3 coated carbon catalyst precursor, adding the precursor into a soluble metal M salt solution for dipping, and then roasting or directly roasting to obtain the hollow Fe2O3 coated carbon catalyst. The prepared catalyst is of a hollow structure and has a large specific surface area, the confinement effect of the hollow structure can be effectively utilized, the contact area of an iron element and synthesis gas is increased, meanwhile, the retention time of the synthesis gas in the hollow structure of the catalyst can be prolonged, and then the yield of the target product C5 + hydrocarbon is effectively increased; and the catalyst shows good catalytic performance in a Fischer-Tropsch synthesis reaction, and meanwhile, the conversion rate of carbon monoxide and the selectivity of a target product C5 + hydrocarbon are improved.

The invention relates to an anti-freezing additive for a straw wrapped puffed feed, and an application method of the anti-freezing additive. The anti-freezing additive is characterized by being prepared through mixing the following raw materials in parts by weight of 70-75 parts of propylene glycol, 20-25 parts of sugarcane molasses and 5 parts of sodium chloride. The anti-freezing additive disclosed by the invention is convenient to use, safe and reliable, the difficult problem that a straw puffed feed is frozen and cannot be used in winter due to low air temperature can be effectively solved, and technique guarantee is provided for supplying stable coarse feed resources for ruminant animals in winter.