234results about How to "Good reduction effect" patented technology

The invention relates to a harmless disposal method of kitchen garbage, which comprises the following steps of: (1) pretreatment: after unloading the kitchen garbage, performing solid-liquid separation, rough crushing, crushing and sorting and performing magnetic separation, and recycling metal substances mixed in the kitchen garbage; (2) hydrothermal hydrolysis: after the pretreatment, adopting the hydrothermal hydrolysis to fully inactivate viruses and bacteria in the kitchen garbage, separating out animal and vegetable fatty oil from the kitchen garbage, and hydrolyzing organic materials at the same time; (3) using the fatty oil obtained in the step (2) as an industrial fatty oil material or further performing deep processing to obtain fatty acid methyl ester or biodiesel; mixing and proportioning the pasty organic materials and then conveying into an anaerobic fermentation system; and conveying large granular organic materials into an aerobic biological fermentation device. The method provided by the invention realizes harmless disposal of the kitchen garbage mainly by the pretreatment and the hydrothermal hydrolysis process, increases the conversion rate of biological energy of the kitchen garbage and increases the economic benefit of kitchen garbage recycling products.

The invention discloses that based on open IFFT / FFT lower reserved subcarrier OFDM system PAPR methods and devices, and the system is using IFFT / FFT transform to a peak frequency domain Consumers sequence in the transmitter to reduce OFDM system ratio of power PAPR, the method described in steps including data distribution , IFFT transformation, realizing OFDM modulation, gained time-domain signal, judgment threshold and whether the number of iterations is to achieve settings, limited Consumers peak processing, extracted through FFT frequency domain reduce-peak sequence. The installations include the transmitter and receiver, the transmitter unit increased data distribution, data option modules, judgment unit, a unit reduce-peak sequence, sequence reduce-peak insert modules; Receiver increased information extraction unit. This invention in a process of elimination-series will not lead to the increase in bit error rate, the effect of significantly reducing the PAPR, the device is simple, running FFT / IFFT the iteration times is less.

The invention provides a dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and a method thereof. The method adopts processes of hydrolysis acidification, multilevel series contact aeration and dephosphorization and denitrification A<2>/O of continuous flow, and comprises the following steps that: a hydrolysis acidification unit is used to treat raw sewage and a little anaerobic phosphorus releasing sludge to realize conversion of VFA; clear solution rich in the VFA after hydrolyzed supplies rich carbon sources for a subsequent dephosphorization and denitrification A<2>/O unit to reinforce synchronous dephosphorization and denitrification; and low concentration phosphorus in the sewage is enriched in the anaerobic phosphorus releasing sewage by the excessive phosphorus absorption capability of a phosphate accumulating organism, and the minor part of phosphorus enriched sewage is drained to carry out chemical phosphorus solidification. The dephosphorization mode can significantly reduce sewage quantity of chemical dephosphorization, improve the utility ratio of a dephosphorizing medicament, reduce dosage of the medicament, has high phosphorous amount in the obtained chemical sludge, and realizes recycle of the middle and low concentration phosphorus in urban sewage by the mode of non residue sludge under a condition of low cost. Sludge decrement can be realized through biofacies separation of a multilevel series contact aeration tank and the function of microorganism predation grade by grade.

An impulse arc welding control method comprises: repeating electrifying using the electrifying of peak current of in peak period and the electrifying of background current in background period as impulse period; controlling the arc length in the manner that the welding voltage value (Vw) is approximately equal to the set voltage value (Vs); making the arc length to vary periodically by making the set voltage value (Vs) to vary synchronistically with the switching signal (Stc); making the impulse parameter (Ps) to vary synchronistically with the switching signal (Stc); and changing the sending speed (Fs) from the time the switching signal (Stc) varying starts to the time arc length (La) transition varying approximately converges. Thus, the major varying of arc force make the shake movement of the bath becomes more intensive to improve the air bubble reducing effect. Consequently, the air bubble reducing effect is improved in the impulse arc welding method with arc length varied periodically.

The invention discloses a method for fast producing methane by utilizing excess sludge, specifically comprising the steps of: (1) pretreating excess sludge; (2) alkaline hydrolysis: releasing organic matters in the excess sludge into a water phase through adopting a single-stage alkaline hydrolysis or a two-stage alkaline hydrolysis, wherein the SCOD (Soluble Chemical Oxygen Demand) of the water phase achieves 2000-10000mg/L. (3) production of methane through anaerobic digestion: inoculating 10%-60% by volume of anaerobic granular sludge in an anaerobic reactor, controlling the volume load at 0.30-0.75kg COD/(m<3>.d), performing methane production reaction within 72h, wherein the methane production capacity achieves 200-400mLCH4/gCOD. The method has the advantages that the processes of firstly performing alkaline hydrolysis on the excess sludge so as to enable the organic matters to be liquidified and then performing liquid-state digestion to produce methane are fast to start, short in reaction period, stable in methane productivity, not only can energy be recovered, but also the stabilized treatment of the sludge can be realized, and remarkable and environment benefits can be both achieved.

The invention relates to an integrated sewage treatment device with high efficiency and low consumption and a treatment method, and belongs to the field of sewage treatment. The integrated sewage treatment device comprises a pretreatment unit, a multi-oxidation-deoxidation environment coupling biological reaction pond unit and a deep treatment unit sequentially connected. The multi-oxidation-deoxidation environment coupling biological reaction pond unit adopts a three-stage anoxia-aerobiotic alternating reaction pond filled with a circular composite glass ball porous microbial carrier. The deep treatment unit comprises a filter cloth dynamic film biological reaction pond and first and second dynamic films. Sewage is treated through the devices sequentially. The device provided by the invention cannot only remove carbon containing organic matters, but also has good nitrogen and phosphorus removal capacity.

This invention discloses a method for treating sludge in city wastewater. The method comprises: (1) pulverizing sludge by ultrasonication so that large quantities of organic matters enter into the liquid; (2) treating the sludge by anaerobic/aerobic biodigestion to obtain organic macromolecular matters; (3) treating by anaerobic biodigestion to convert the majority of the organic matters into methane for utilization; (4) purifying the small molecular organic matters by aerobic biodigestion to obtain humic acid in the supernatant; (5) separating and recovering humic acid by membrane separation technique so that the output water satisfies state wastewater discharge standards. The obtained humic acid can be used as an organic liquid fertilizer. The method can be used to treat primary-precipitation sludge, residual active sludge, humic acid sludge and mixed sludge produced by city wastewater treatment plants. The obtained organic liquid fertilizer is safe and reliable.

The invention relates to an A/O denitrification sewage treatment process and a device capable of realizing sludge reduction. The process comprises the following steps: leading sewage in an anoxic zone to realize denitrification and then leading the treated sewage in an aeration zone to carry out aeration treatment; pumping part aerated sewage to the upper part of the anoxic zone to realize refluxing of mixed solution; leading residual sewage in a deposition zone to realize sludge-water separation through natural deposition; and pumping part deposited sludge to a sludge detention tank according to sludge refluxing ratio and then pumping the part deposited sludge to the upper part of the anoxic zone after 5.0 to 8.0 hours of detention to realize sludge refluxing. The A/O denitrification sewage treatment process and the device have the advantages that the process effectively combines sewage denitrification treatment and sludge reduction and has the advantages of both A/O denitrification process and OSA process, thereby realizing sludge reduction while ensuring effluent water quality; meanwhile, the process has simple flow and reduces material consumption and energy consumption; moreover, the process saves investment and does not cause potential problems in environmental safety; and the device has low investment and operation cost and convenient operation management.

The invention discloses a wide-band RCS reduction super surface based on slit loading, comprising a dielectric substrate, a metal patch for loading a gap and a metal floor. The metal patch loaded witha plurality of pairs of cross-shaped slits is printed on the upper surface of the dielectric substrate, and the metal floor is printed on the lower surface of the dielectric substrate. An artificialmagnetic conductor unit is designed to have a resonant frequency of 12 GHz, and the in-phase reflection relative bandwidth is 50%. At the same time, broadband AMC super units and double-ring AMC superunits are arranged according to a 3*3 chessboard manner at intervals. Each kind of AMC super units consists of 3*3 basic AMC units, and finally RCS reduction of 7.5 dB or more in the frequency rangeof 8 to 19.2 GHz is realized. The artificial magnetic conductor structure and the AMC-AMC checssboard-shaped electromagnetic stealth surface of the invention have the advantages of good robustness, polarization insensitivity and the like.

The invention provides a system and a method for processing residual sludge decrement synchronous denitrification, The system is characterized in that a raw water injection mechanism, a sludge injection mechanism, a draining mechanism and a mud discharge mechanism are respectively connected with a main reactor, sidewall of the main reactor is respectively provided with a pH sensor and an ORP sensor which are connected with a controlling device, the top of the main reactor is provided with a temperature control apparatus. The realization steps of the system comprise that the main reactor is inoculated to mixed sludge and adjusted to start the control apparatus, nitrification liquid is injected in the main reactor, slurry in the main reactor is reacted by a stirrer, and determined whether the mud discharge is required or mud change is required, deposited, drained for standby, the set value of the cycle number is determined by a computer. According to the invention, carbon source in residual sludge is discharged for strengthening sewage denitrification and treating phosphorus removal, exploitation and utilization of carbon source completed at same time in same space can be realized, and the cost of sludge disposal in water plant can be simultaneously reduced.

A heat treatment-dehydration-making fertilizer method of urban sewage and sludge is provided, which pertains to the treatment filed of solid waste. Sodium hydroxide is added into dewatered sludge and stirred, hypoxic steam with temperature and pressure more than 250 DEG C and 4MPa is input, the temperature is raised to 120-140 DEG C for 40-100 min; the temperature is reduced to less than 100 DEG C, dehydrated liquid and dehydrated sludge cake with amount decreased are obtained after dehydration; the dehydrated liquid is treated by sand filtration and microfiltration, then whole filtration is carried out and the concentrated solution with humic acid more than 3wt percent is obtained; the humic acid liquid fertilizer is obtained after the concentrated solution is added with additive. The invention can greatly reduce the expenses of sludge heat treatment; water content of the obtained dehydrated sludge cake is less than 60 percent and the total solid reduces by 35 percent; the heavy mental content of the obtained humic acid liquid fertilizer is low, the pH value keeps in the range of weak alkaline and the pathogen is inactivated; the method is safe and efficient, complies with Fertilizer Application Guideline of National Ministry of Agriculture and can be widely applied to harmless, quantitative reduction and resource utilization treatment of urban sewage and sludge.

A novel sewage treatment process utilizing ferrate oxidization to reduce sludge quantity comprises the steps that a emical treatment unit effectively removes and converts organic pollutants into inorganic small molecular substance through microorganism in a biochemical treatment system, and the certain sludge concentration in the biochemical treatment unit is maintained; in a sediment unit, sewage produced after the treatment of the biochemical treatment unit enters a secondary sedimentation tank to perform sludge-water separation, a part of subsided sludge is excess sludge, the rest is returned sludge, and two third of returned sludge directly enters the biochemical treatment unit; in a ferrate oxidization treatment unit, one third of returned sludge enters a sludge reaction tank to react with input ferrate for 10-30 minutes, wherein the mass ratio of the ferrate to the excess sludge is 0.2:1; and a sludge dewatering unit performs filter pressing or centrifugal dewatering of the excess sludge. The novel sewage treatment process can reduce 35-45% of excess sludge quantity, has the advantages of being simple in devices, few in investment, free of pollution, convenient to operate and manage, low in operation cost and the like, and is suitable for application of industrial municipal sewage treatment plants.

A kind of car-carried mathanol catalytic cracking device fuel pipe auto-control system automatically controls the second air jet-in device, pre-heat device, oil pump, spray nozzle and electro magnetic valve according to the signal inputted by temperature sensor, pressure sensor and air flowmeter through ECU. Thus, the gas with rich hydrogen from said cracking device is mixed with fuel to inject into the engine as different ratio in different condition and rotate speed, to reduce tail-gas displacement.

The invention discloses a multi-stage suspension magnetizing roasting-magnetic separation system and method for refractory iron ore, which belongs to the field of mineral processing technology. This system comprises multistage suspension preheater, multistage suspension oxidizer, multistage suspension redactor, on-line grade analyzer, ore-like splitter, magnetic separator, dust remover, roots blower and other components and connection modes. The refractory iron ore treated by the present method can be produced to homogeneous magnetite or maghemite accurately, and through magnetic separation, on-line grade analyzer detection and ore-like splitter, the concentrate powder which reach the set grade can be obtained, and the unqualified ore powder enters the next stage of oxidation-reduction-magnetic separation-split treatment. Through the present system and method, products with different roasting quality can be obtained, and can avoid the phenomenon of over burning or under burning occurring in the past process and equipment.

The invention discloses a method for quickly reducing vomitoxin in wheat. The method comprises the following steps: (1) pouring wheat raw materials with removal of impurities into a reaction tower; (2) connecting an ozone generator with the reaction tower so that ozone is capable of going into the reaction tower to react with the vomitoxin in the wheat raw materials, wherein the ozone concentration is 0-100mg/L. The method for quickly reducing the vomitoxin in wheat is used for reducing the vomitoxin in wheat or wheat flour, and is simple in process, specific in parameter and remarkably improved in reduction rate; as a result, the vomitoxin in wheat can be reduced quickly, safely and effectively, and the reduction rate can be above 80%.

The invention discloses a method fpr coupling denitrifying dephosphatation and partial nitrification, and belongs to the field of municipal wastewater treatment. Firstly, raw water enters an (A/A/O)-SBR reactor; carbon pick-up synthesis polyhydroxyalkanoate (PHA) and phosphorus release reaction at an anaerobic phase are carried out; oxidation-reduction potential (ORP) is controlled at -30mv to -240mv; dissolved oxygen (DO) is smaller than or equal to 0.2mg/L, and then nitrifying reflux liquid containing NO2<-> from N-SBR is injected to carry out anaerobic denitrifying dephosphorization reaction; the ORP is controlled at -90mv to -210mv; the DO is smaller than or equal to 0.2mg/L. The flow of the nitrifying reflux liquid is adjusted at the stage according to the anaerobic phosphorus-release condition. The transient aeration, nitrogen stripping and aerobic phosphorus absorption are carried out after complete reaction; the DO is controlled to 2-3mg/L; sediments are stilled; discharged water enters the N-SBR reactor to carry out aerobic aeration. Nitration is controlled at a short-range stage through an 'ammonia valley' on a pH curve and an 'ammonia-nitrogen jump point' on a DO curve in the process; still deposition is carried out after the reaction is ended; a part of supernate is returned and the other part is discharged; the discharged water quantity is equal to the initial water inflow of the system. The denitrifying dephosphatation principle and the partial nitrification principle are applied, energy conservation and consumption reduction are achieved, and the method is applicable to a domestic wastewater with low C/N ratio, so as to achieve a synchronous and deep nitrogen and phosphorus removal effect.

The invention discloses a tobacco-stem fiber composite filter rod and a production method thereof. The tobacco-stem fiber composite filter rods are binary or ternary composite filter rods composited by tobacco-stem fiber base rods and ordinary cellulose acetate fiber base rods. The manufacturing method includes that tobacco stems are ground to prepare tobacco-stem fibers, water extract of the tobacco stems is sprayed on the surfaces of the tobacco stems, and the tobacco stems are dried to be production into the base rods and further composited with the ordinary cellulose acetate fiber base rods into the binary or the ternary composite fiber rods. The tobacco-stem fiber composite filter rods produced are good in tar reduction, and original fragrance of the tobacco stems can be sustained. The production method is simple in operation, low in equipment requirement, low in cost and suitable for industrial production.

The invention relates to the technical field of resin materials, in particular to a novel sulfonated melamine-formaldehyde resin and a preparation method thereof. The raw materials of the sulfonated melamine-formaldehyde resin include modified melamine, formaldehyde, sodium metabisulfite, sulfuric acid, saturated calcium hydroxide, sodium hydroxide and water. Melamine can be replaced by modified melamine. When melamine is modified with lauryl alcohol Jinxin, its molecular weight can be increased, its production cost can be reduced, and thus it can be mass-produced.

The invention relates to a phosphate for lowering the content of cadmium in plants planted in acidic cadmium-containing soil and/or improving the yield of the plants planted in the acidic cadmium-containing soil, and mainly provides an application method and the like of the phosphate for lowering the content of cadmium in the plants planted in the acidic cadmium-containing soil and/or improving the yield of the plants planted in the acidic cadmium-containing soil.

The embodiment of the invention discloses a method for inhibiting a peak to average power ratio of a signal, a device thereof and a transmitter, wherein the method for inhibiting the peak to average power ratio of the signal comprises the following steps: after multi-path time delay is conducted to a input signal, signals of at least two paths with different delay times are output; the signals of at least two paths with different delay times in the output signals are superimposed; the PAPR values of the superimposed signals are respectively detected to determine a signal combination corresponding to the superimposed signal with the lowest PAPR value or with PAPR value smaller than a preset PAPAR threshold value; and signals in the signal combination are output after being superimposed and normalized. By simulating multi-path, the method can obtain relatively good PAPR lowering effect without greatly affecting the average power and demodulating performance of a system.

The invention discloses a low-RCS antenna, which comprises an artificial surface plasmon coupling medium and a feeding structure, the feeding structure comprises a monopole antenna and a ground plane,and the monopole antenna is arranged on the ground plane; the artificial surface plasmon coupling medium is arranged on the ground plane; and the artificial surface plasmon coupling medium comprisesa periodic metal cell array and a dielectric substrate, and the periodic metal cell array is arranged on the surface of the dielectric substrate. Thus, the low-RCS antenna provide by the embodiment ofthe present invention adjusts and controls the strong-weak dispersion region in the artificial surface plasmon dispersion curve, so that when the antenna is in the weak dispersion region, electromagnetic waves can be efficiently transmitted and radiated along the coupling medium; and when the antenna is in the strong dispersion region, the electromagnetic waves are strongly absorbed. The antennais simple in structure, adopts a printed circuit board technology to process, and is low in cost and easy to be conformal, and on the premise of ensuring the efficient receiving/transmitting performance, an RCS reduction effect is obvious, and a good RCS reduction effect is achieved even in a relatively large angular domain.

The invention discloses a method for reinforcing alkaline fermentation and acidogenesis of excess sludge by straws. The method mainly comprises the following steps of pretreating the straws, pretreating the excess sludge, jointly fermenting the straws and the sludge, and removing the nitrogen and phosphor from fermenting liquid, wherein the straws are pretreated into a proper outer carbon source, and the excess sludge is pretreated by soaking liquid. The method has the advantages that compared with simple pure alkaline liquid, the concentration of the soaking liquid is higher; the concentration difference is formed between the inside and outside of sludge cells, and the plasmolysis of the sludge cells is caused, so that under the simultaneous action, the sludge treatment time is shortened, the carbon and nitrogen ratio of a straw-sludge fermenting system is adjusted, the hydrolysis of the excess sludge is enhanced, the efficiency of anaerobic fermentation and acidogenesis is promoted, the economic feasibility of the anaerobic fermentation technology of the sludge is improved, and the problem of low acidogenesis efficiency due to insufficient content of organic matters in the excess sludge is solved.