166results about How to "Improve the environment" patented technology

A wavelength division multiplexer/demultiplexer is provided that integrates axial gradient refractive index elements with a diffraction grating to provide efficient coupling from a plurality of input optical sources (each delivering a single wavelength to the device) which are multiplexed to a single polychromatic beam for output to a single output optical source. The device comprises: (a) means for accepting an optical input from at least one optical source, the means including a planar surface; (b) a first coupler element comprising (1) a first axial gradient refractive index collimating lens having a planar entrance surface onto which the optical input is incident and (2) a first homogeneous index boot lens affixed to the first collimating lens and having a planar exit surface from which optical light exits; (c) a diffraction grating formed on the planar exit surface which combines a plurality of angularly separated diffracted wavelengths from the optical light; (d) a reflecting element for reflecting the plurality of diffracted wavelengths; (e) a second coupler element comprising (1) a second homogeneous index boot lens having a planar entrance surface onto which said plurality of diffracted wavelengths is incident and (2) a second axial gradient refractive index collimating lens affixed to the second homogeneous index boot lens; and (f) means for outputting at least one multiplexed, polychromatic output beam to an optical receiver, the means including a planar back surface. The device may be operated in either the forward or the reverse direction.

The invention discloses a high performance concrete with steel slag as an admixture and aggregate and a preparation method thereof. The concrete is composed of a cementing material, aggregate, a water reducer and mixing water. The cementing material is prepared by compounding, by mass, 50 to 80% of cement, 10 to 30% of superfine steel slag powder and 10 to 30% of superfine mineral slag, wherein the specific surface areas of the superfine steel slag powder and the superfine mineral slag are respectively controlled to be 400 to 600 m<2>/kg and 400 to 500 m<2>/kg. The aggregate is composed of broken stone, steel slag sand and river sand, wherein the particle size of the steel slag sand is 5 to 10 mm, the steel slag sand is used to partially replace the broken stone, and the addition amount of the steel slag sand is 20 to 50%. The high efficiency water reducer is dissolved in water in advance and then added with the mixing water. The preparation method provided by the invention is simple and can prepare concrete with a grade in a range of C20 to C60 and substantially improve the comprehensive utilization rate of the steel slag; and the prepared concrete has good work performance, mechanical properties, etc. and substantially improved endurance.

The invention relates to a passivation remediation agent for arsenic contaminated soil. The passivation remediation agent is prepared from components in parts by weight as follows: 20-30 parts of a calcium-based compound, 30-40 parts of a silicon-based compound, 30-40 parts of humic acid, 20-30 parts of an organic material and 5-10 parts of biochar. The invention also relates to a preparation method and a remediation method of the passivation remediation agent for the arsenic contaminated soil. The preparation method comprises steps as follows: the calcium-based compound, the silicon-based compound, the humic acid, the organic material and the biochar are crushed into powder with the granularity smaller than 100 meshes, mixing and stirring are performed until the uniformity of the mixtureis higher than 90%, and the passivation remediation agent is obtained. The passivation remediation agent has the advantages that the remediation cycle is short, the cost is low, the process is simpleto operate, the spectrum is wide, the capacity increasing amount is small, the agent is easy to obtain, threshold for equipment and technicians is low during use and the like.

The invention discloses a lithium ion battery pack state-of-health evaluation method and a lithium ion battery pack state-of-health evaluation system. According to the method, first, the state of health of a battery pack is preliminarily judged according to the end voltage of each battery string in the battery pack, and then, the state of health of the battery pack is comprehensively evaluated from the discharge capacity, internal resistance and temperature of the battery pack. The system comprises a control unit, a battery charging and discharging unit, a protection unit and a sound-light-electricity display unit. The control unit comprises a data reading unit, a data storing unit, a data processing unit and a data sending unit. According to the evaluation method and the evaluation system provided by the invention, all kinds of complicated environmental influences facing the battery pack in the using process are considered, comprehensive evaluation of the state of health of the batteries in the battery pack is completed, and the accuracy of test results is improved.

The invention discloses an admixture of ferrous manganese ore slag concrete and a method of production of the admixture. Weight percentage of components of the admixture of ferrous manganese ore slag concrete is: the ferrous manganese ore slag of 95 percent-100 percent and an active stimulator of 0 percent-5 percent, wherein the active stimulator is one of natural gypsum, mirabilite and alum. The process comprises: (1) drying the discarded ferrous manganese ore slag till the time when water ratio is less than 1 percent, (2) adding grinding aids into the ferrous manganese ore slag and mixing uniformly the grinding aids and ferrous manganese ore slag, (3) adding the active stimulator, mixing uniformly and placing in a ball grinder for grinding till the specific surface area of 400-600m 2/Kg According to required concrete intensity, adding amount of micro-powder admixture of ferrous manganese ore slag is 10 percent-40 percent, and the concrete manufactured according to the national standards can meet the requirement of C20-C60 strength class. The concrete not only is perfect in use effects, but also uses a good deal of industrial waste and saves energy, and the invention is capable of being used in civil architectures, highways and bridges.

invention relates to a method for operating an internal combustion engine, in the exhaust gas section of which is arranged at least one SCR catalytic converter, which is hit with a reagent that contributes to NO_x conversion in the SCR catalytic converter, and to a device for implementing the method. At least one measure is calculated for the NO_x concentration downstream after the SCR catalytic converter. An NO_x sensor, which is arranged downstream after the SCR catalytic converter, generates an exhaust gas sensor signal which corresponds to at least the NO_x concentration and optionally, as a result of cross sensitivity, to a reagent slip. A reagent signal, which determines the dosage of reagent, is influenced by a correction signal as a function of the difference and as a function of a measure for the temperature of the SCR catalytic converter.

The object of the present invention is provide a rubber composition for coating a tire cord, which improves adhesion with a tire cord and has an effect of recovering adhesion with a tire cord at hygrothermal aging with maintaining the initial vulcanization rate. The present invention relates to a rubber composition for coating a tire cord comprising 0.7 to 3 parts by weight of benzothiazolyl sulfenamide or benzothiazolyl sulfenimide represented by the chemical formula (1): (wherein R1 is a linear alkyl group having a branched structure of 3 to 16 carbon atoms, and R2 is a linear alkyl group having a branched structure of 3 to 16 carbon atoms or a benzothiazolyl sulfide group) and 3 to 7 parts by weight of sulfur based on 100 parts by weight of a rubber component containing at least 60% by weight of a natural rubber and/or an isoprene rubber.

An apparatus to control an air conditioner system and a method for controlling the same, in which an operational priority is given to an air conditioner or a ventilation system according to peripheral environment and a season such that the air conditioner and the ventilation system are selectively operated to provide optimum air conditioning environment. The method of controlling the air conditioner system including the air conditioner to cool and heat a room and the ventilation device to perform a ventilation operation includes detecting an outdoor temperature, determining a season by comparing the outdoor temperature with a preset reference temperature, and determining an operational priority relative to the air conditioner and the ventilation device based on the determined season.

The invention relates to a method and a system for establishing a power grid visualized perceptual model. The method comprises the following steps: firstly, performing situation awareness demand analysis according to the target of power grid security risk assessment, then sequentially performing data preprocessing and data integration according to the result of the situation awareness demand analysis, establishing a knowledge correlation analysis engine for data of environment factors and production factors, extracting the knowledge data to obtain statistically synthetic KPI data in a space dimension and a time dimension, adopting a visualization technology to visually show diagrams of the environment data, the statistically synthetic KPI data and the knowledge data, and combining the situation awareness with the visualized views to realize situation visualization, so as to establish the power grid visualized perceptual model. Through the model, the information of the various factors in the environment can be immediately acquired and acknowledged, the future state of the environment can be predicted, and the running state of the power grid can be shown in real time, so that users can understand and use the power grid knowledge more directly and quickly.

The invention provides a microbial preparation for purifying sewage and deodorizing garbage. The microbial preparation is a liquid culture which comprises the following microorganisms: saccharomyces cerevisiae, hansenula polymorpha, rhodopseudomonas palustris, bacillus licheniformis, bacillus subtilis, bacillus megaterium, streptomyces microflavus, lactobacillus acidophilus, lactobacillus plantarum and streptococcus thermophilus. A liquid culturing medium comprises molasses, sodium chloride and urea. The number of viable bacteria in the microbial preparation is more than 1*1010cfu/ml. The microbial preparation can be added into the sewage or sprayed into a garbage transfer station, a garbage landfill and a farm to improve the environment significantly.

The invention discloses a control method and a control device for a movable air conditioner and the air conditioner. The control method for the movable air conditioner comprises the steps that the dry-bulb temperature and the relative humidity of an environment in which the movable air conditioner is located at a cooling mode are detected in real time; a detected dry-bulb temperature value and a detected relative humidity value are separately compared with a preset temperature threshold and a preset humidity threshold; and working states of an air-outlet motor, a water pump and a compressor are controlled according to comparison results. By adopting the control method for the movable air conditioner, indoor side air outlet temperature can be lowered rapidly; the dehumidification amount is increased; a high-temperature and high-humidity indoor side environment is improved, so that requirement of a user on indoor temperature and indoor humidity comfort can be met by the indoor side humidity and temperature; meanwhile, requirement of the user of rapid cooling and rapid dehumidifying is met; and use satisfaction of the user is improved.

The present disclosure is directed to a system and method for protecting a rotary machine in a high noise environment. In one embodiment, the method includes a step of measuring a vibration signal during operation of the rotary machine. Another step includes modulating the vibration signal at a desired frequency to generate a modulated signal having a direct current (DC) value. The desired frequency varies as a function of an operational parameter of the rotary machine. The method also includes a step of filtering the modulated signal via one or more low-pass filters. Another step includes comparing an amplitude of the filtered signal to a threshold amplitude for one or more components of the rotary machine. The threshold amplitude is indicative of an imbalance within one or more components of the rotary machine. The rotary machine is then operated based on the comparison so as to protect the rotary machine from damage caused by the imbalance within the one or more components of the rotary machine.

The invention provides a method for producing a soil conditioner raw material by using kitchen garbage and solid agriculture and forestry wastes. The method comprises the following steps of (1) performing raw material treatment: respectively treating the kitchen garbage and the solid agriculture and forestry wastes; (2) performing subcritical hydropyrolysi-ozone oxidization digestion: feeding smashed raw materials into a reaction kettle, and feeding ozone for digesting the raw materials in a united manner under a high-temperature and high-pressure subcritical environment; (3) after the raw materials are digested, cooling and decompressing the reaction kettle, and performing solid-liquid phase separation on products; and (4) drying and smashing the separated solid phase products to obtain the soil conditioner raw material for later use, and feeding liquid phase products into a water storage basin for recycling. According to the method, an effect of improving the environment in both the urban and countries is achieved, energy is fully saved, repeated use of resources is realized, and harm caused by improper treatment on the garbage to human is avoided; the ecological benefit of a kitchen garbage recycling product is enhanced, the cost for treating the kitchen garbage is lowered, and the appeal of harmless, reducing and recycling garbage treatment of the government is responded.

The invention relates to a water-cooling exhaust pipe for a marine diesel engine. The water-cooling exhaust pipe comprises a shell and a smoke exhaust pipeline arranged in the shell in an inserted manner; the smoke exhaust pipeline as one end of a smoke outlet extends out of the shell; a chamber between the smoke exhaust pipeline and the shell forms a cooling water path; the shell is provided with a water inlet and a water outlet which are communicated with the cooling water path. According to the water-cooling exhaust pipe disclosed by the invention, the temperature of the smoke outlet can be reduced to about 80 degrees, so that the environment around the engine is greatly improved; especially, in case of a relatively small cabin, the water-cooling exhaust pipe plays a remarkable effect of improving the ambient temperature.

The invention provides a melting and iron-smelting device of a heat storage type electric arc furnace, which comprises a furnace body of the electric arc furnace and matched equipment, at least one pair of combustion chambers and at least one pair of heat storage devices, the device is further provided with at least one pair of gasification boxes which are arranged between the furnace body of theelectric arc furnace and the combustion chambers, and at least one layer of coal grid is arranged in each gasification box. Each gasification box is provided with a bypass, and valves are arranged onan outlet, an inlet and the bypass of each gasification box. The device aims at preventing reduced substances at the gas inlet from being oxidized after that circulating gas or air enters the electricarc surface; oxygen-containing gas preheated by the heat storage devices, in particular to the air, firstly enters the combustion chambers to be mixed with fuel sprayed into the combustion chambers for burning before entering the electric arc furnace, and high-temperature flue gas is exhausted from the combustion chambers and then enters the gasification boxes to carry out gasification reaction with coal in the coal grids for generating CO, thereby forming a reducing atmosphere, optimizing the environment of melting, reducing and iron-smelting of the electric arc furnace, being conductive tothe reducing process of the reduced substances, improving the quality of reduced iron products and reducing environmental pollution.

A kitchen fresh air system comprises an extractor hood and a ceiling. A fresh air outlet is formed in a machine shell and communicates with an outdoor port through a first fresh air channel and a second fresh air channel. A fresh air draught fan and a first one-way valve are arranged in the second fresh air channel. An air inlet is formed in the ceiling. An air return channel for communication ofthe air inlet and the second fresh air channel is arranged above the ceiling. A second one-way valve is arranged in the air return channel. A fresh air purification device is arranged in the second fresh air channel. An air outlet of the air return channel communicates with the part, between an air inlet of the fresh air purification device and an outdoor fresh air suction-in port, of the second fresh air channel. The first one-way valve is arranged on the part, between the air outlet of the air return channel and the outdoor fresh air suction-in port, of the second fresh air channel. According to the kitchen fresh air system, clean air can be provided into a kitchen during cooking and after cooking through control over the first one-way valve and the second one-way valve, the fresh air system enters an inner circulation mode when the outdoor environment is seriously polluted, and accordingly the kitchen air is purified.

A resin foam is provided which has a porosity (X) of 80% or higher and has pores (L) with a pore diameter of 1-1,000 [mu]m and pores (S) with a pore diameter of 0.01-1 [mu]m, excluding 1 [mu]m. The resin foam is excellent in heat-insulating performance and environmental performance. Also provided is a chlorofluorocarbon-free heat-insulating material. This heat-insulating material retains excellent heat-insulating performance for long and is less apt to suffer dew condensation. The heat-insulating material is characterized by comprising a resin foam having a porosity (X) of 80% or higher and having pores (L) with a pore diameter of 1-1,000 [mu]m and pores (S) with a pore diameter of 0.01-1 [mu]m, excluding 1 [mu]m.

The invention provides a waste gas treatment process and device adopting a reverse flow counter-impact turbulence washing tower. The process includes following steps: enabling waste gas to pass a heat exchanger and enter a reverse spray washing pipe of the reverse flow washing tower to contact with a first-stage reverse spray, second-stage reverse spray or third-stage reverse spray absorbing liquid circulating system which sprays flow upwards to obtain mixed absorbing liquid, and forming a gas-liquid turbulence foam washing area; enabling the mixed absorbing liquid to enter the bottom of the reverse flow washing tower along the flow and enter a holed pipe to form a gas-liquid or liquid-liquid bubble washing area, enabling the waste gas after going through the bubble washing area to pass a defoamer and then an outlet of the heat exchanger, and discharging the waste gas after being purified. The waste gas treatment process and device has the advantages that gas-liquid counter-impact is utilized to increase contact specific surface area of the waste gas and the absorbing liquid to form the turbulence foam washing area, and the three reverse spray absorbing liquid circulating systems are designed creatively; natural gravity of the reverse spray absorbing liquid is utilized, and pipe wall hole diameter of 1-20mm is designed at the bottom of the reverse spray washing pipe creatively to form the bubble washing area.

The invention discloses a method for culturing litopenaeus vannamei in saline-alkali soil. The method sequentially comprises the steps of preparation of a pond, clearing of the pond, nutrification of water, water introduction, fertilization, covering with a greenhouse, releasing of shrimp larvae, feeding and shrimp harvesting. The method is characterized in that the pond is prepared following the steps of firstly, site selection, wherein before site selection, testing is conducted, and measurements of the salinity higher than 0.05%, the calcium ion concentration higher than 80 mg/L and the magnesium ion concentration higher than 150 mg/L are required; secondly, building of the pond, wherein the rectangular pond with the area of 100-500 mu is selected, the length-width ratio is (1-2):(2-3), the depth of the pond is 1.5-1.8 meters, and the maximum water-storage depth is 1.2-1.5 meters. The pond bottom gradient meets the requirement that water in the pond can flow by itself to be drained, a water discharging system and a water inlet system of a farm are separately arranged, a small pond is built in a small reservoir at a water inlet of the rectangular pond according to the scale of (30-50):1, and the bottom of the small pond is 30 centimeters or above higher than the rectangular pond; an aerator is arranged. According to the method suitable for culturing the litopenaeus vannamei in the saline-alkali soil, the method can be suitable for culturing the litopenaeus vannamei in the saline-alkali soil, and the saline-alkali soil can be developed and utilized.

The invention discloses a method for producing a heat storage brick by the magnesite tailing, which improves the heat storage capability and the thermal shock stability of the heat storage brick. The method for producing the heat storage brick by the magnesite tailing comprises the following steps of: mixing 55-65wt% of magnesite tailing and 35-45wt% of iron powdered ore; carrying out ball milling to mixed materials in a ball mill; adding 5wt% of water into the ball-milling material in a mixing mill for mixing to obtain aggregate; breaking and screening the prepared aggregate; adding 5wt% of sulphurous acid paper pulp waste liquor as binder; then adding 1-1.5wt% of steel fiber to evenly mix; and mixing by the mixing mill; and pressing the mixed material into the heat storage brick under the pressure of 1000-1200KN. The method disclosed by the invention is characterized in that the magnesite tailing which is the waste after the magnesite tailing is adopted for mineral separation serves as raw material, the magnesite resource is effectively utilized, the phenomenon that a great quantity of magnesite tailing is accumulated is avoided, and the environment is improved. Meanwhile, the mafic heat storage material produced by the magnesite tailing has strong heat storage capability, the compression strength can reach 50-60MP, and the bulk density reaches 2.5-4g/cm<3>.

Virtual function calls in hybrid compiled and interpreted computer programming environments are carried out efficiently by dual virtual function tables. Each class object generated is provided with a compiled virtual function table and an interpreted virtual function table. Each table is symmetrically structured and contiguous with the class object. Calls from an interpreted function access the interpreted virtual function table. Entries in that table point to function data structures which provide for the interpretation of the called function, or for transfer to execution of a compiled version of the called function. Calls from a compiled function access the compiled virtual function table. Entries in the compiled virtual function table point to either executable code representing the called function, or to transition code for transition to the interpreter to interpret the called function.

Disclosed is an alloy element additive used for aluminum alloy production. The alloy element additive is composed of alloy element powder to be added, mgcl2-group fusion powder and an adhesive. The components comprise, by mass, 70%-90% of the alloy element powder, 10%-30% of the mgcl2-group fusion powder and 0-5% of the adhesive. The sum of the mass percents of the three components is 100%. Alloy elements are organically combined with a refining agent, so that the alloy element additive not only has an alloying function, but also has a refining effect. According to the alloy element additive and a preparation method thereof, mgcl2-group fusion serves as a fusing agent, so that not only is the fusing function to the alloy element powder achieved, but also the refining function to aluminum water is achieved, and accordingly the agent is multipurpose indeed. The alloy element additive does not contain toxic substances, thereby being safe and environmentally friendly

The invention relates to an architectural tile prepared by using Anshan-type iron ore tailings and a preparation method thereof. The architectural tile comprises iron ore tailings powder, blast furnace slag, borax, anhydrous BaCO3, magnesite, potassium feldspar, soda ash, TiO3, Sb2O3 and sulfur; and the preparation method comprises the following steps of: putting materials into a ball mill and carrying out mixed milling for a certain time to reach required granularity, adding water and blending into uniform thin paste, removing air bubbles on a vibration machine, removing upper water, pouring into a ceramic mold, vibrating on the vibration machine, then removing upper water, then putting the mold and the materials into a drying furnace together to be dried, putting into a sintering furnace to be roasted, discharging and demolding, cutting and shaping. The invention effectively utilizes resources, improves the environment and solves stacking problem of tailings. Compared with the prior art, the invention has high utilization ratio of iron tailings, low porosity, no waste gas, waste residues, waste water, noise and radioactive contamination in the preparation process, simple production process and easy operation. The cut and polished product has bright and clean surface and can substitute decorative materials, such as marble granite, and the like.

The invention provides an ecological soil retaining structure. The ecological soil retaining structure mainly comprises soil retaining plates, ecological bags, small balconies, supporting piers, inverted filter layers, drain holes, plants, drip irrigation pipes, flow guide grooves and vertical drain holes. The ecological soil retaining structure can replace an existing soil retaining plate technology, and is arranged between piles of a sheet-pile retaining wall or between stand columns of an anchor rod retaining wall or is combined with other retaining structure styles to be used. The ecological soil retaining structure is mainly characterized in that the ecological bags and the soil retaining plates are alternatively arranged from bottom to top and combined together to form an ecologicalface wall, the soil retaining plates are main pressure-bearing components which bear the soil pressure, and the ecological bags are main carriers of green landscapes. The ecological soil retaining structure enables a conventional concrete face wall to be changed into the ecological face wall capable of achieving landscape greening, and the largest greening area of the face wall can be 70% or above. The ecological soil retaining structure comprises a drip irrigation system and a drainage system, and is combined with the technology characterized in that the space behind the plates is refilled with planting soil, the excellent environment is provided for plant growth, and the landscape greening effect is quite excellent.

The invention relates to a textile fabric capable of releasing negative ions. The external surface of the textile fabric is covered by a layer of vermiculite-tourmaline coating. The preparation technology is simple, the prepared textile fabric can release negative ions for a long time; and the wallpaper and automobile internal decoration surface, which are prepared from the provided textile fabric, have an excellent performance on cleaning the air, preventing fire, insulating the heat, and reducing the noise.

The invention relates to a sea mud substitute for adult stichopus japonicus feeds. The sea mud substitute comprises the following compositions in percentage by mass: 30-50% of bentonite, 6-15% of zeolite, 8-15% of medical stones, 7-20% of shell powder, 6-8% of natural sea mud powder, 7-10% of active carbon powder, 5-10% of compound vitamins, 5-10% of composite minerals and 1-3% of ceylon persimmon sawdust. The sea mud substitute disclosed by the invention is specifically prepared through simulating the habitat environment and situations under growth conditions of stichopus japonicus on the basis of analyzing the compositions of sea mud swallowed by stichopus japonicus under natural conditions, so that the problem that in production, high-quality sea mud is difficult to obtain and pathogenic bacteria are increased due to the application of sea mud in natural environment is solved. The sea mud substitute takes bentonite, zeolite and medical stones as matrixes, so that the sea mud substitute can provide sufficient mineral elements for the growth and ingestion of stichopus japonicus.

A curing agent for sludge and sand consists of fly-ash 1-50 proportion, aluminum silicate 5-70 proportion, polymerized ferric sulfate 0.1-15 proportion, phosphogypsum 0.1-60 proportion, glauber salt 0.1-20 proportion and calcium carbonate 5-60 proportion. It can be added into various sludge, mud and sands, which makes sludge, mud and sands coagulation and curing rapidly. It can have better early-stage strength and more heat and accelerate chemical reaction between curing material and mud.

The invention provides an inner circulation type denitrifying reactor. The inner circulation type denitrifying reactor comprises a reactor body, wherein the reactor body is internally provided with flow guide plates for longitudinally separating the reactor body into three spaces, namely a water inlet region, a biological packing region and a water outlet region; the biological packing region is internally provided with biological packing; an aeration head is arranged at the lower part of the reactor body; a denitrifying sludge reflowing pipeline, communicated to the top of the reactor body, is further connected and arranged at the bottom of the reactor body. The invention further discloses an inner circulation film formation method of aerobic and salt-resisting denitrifying bacteria. By adopting the inner circulation type denitrifying reactor provided by the invention, rapid film formation of the aerobic and salt-resisting denitrifying bacteria is realized. With the adoption of the method, the problems that the content of nitrate and nitrite of rear-end output water of a biological denitrifying system is high and the content of total nitrogen does not reach the standard and the like can be completely solved; and meanwhile, the method is simple and easy to operate and has a relatively short implementation period and engineering-oriented implementation can be directly carried out.

The invention relates to a production process for straw coal. The adopted technical scheme comprises the following steps of: crushing straw; adding the crushed straw into a charring furnace, and charring at the temperature of 800 and 1,200 DEG C for 30 to 50 minutes under the anaerobic state; cooling to the temperature of 200 and 250 DEG C, adding 20 to 30 weight parts of loess, 20 to 30 weight parts of coal slime, 0.1 to 0.7 weight part of sulphur-fixing agent and 0.1 to 0.7 weight part of paraffins into 100 weight parts of charred straw, and mixing the mixture uniformly; and conveying to an extruder, forming and drying. The straw coal produced by the invention is newly developed energy, and the straw of crops is utilized fully, so that waste materials are turned into wealth, the rural environment is improved, and the produced straw coal has high quality and heat value of up to about 5,000 kilocalories, and is safe, pollution-free, energy-saving and environmentally-friendly.

A solid solution photocatalyst composition and its preparation method are provided in the present invention. The solid solution photocatalyst can utilize its solid solution structure to regulate the conduction band position, valence band position, conduction band range and valence band range of the different response properties of the photocatalyst, so that oxidoreductive reaction is performed to remove the foul-smelling substances.