82results about How to "Save running costs" patented technology

The invention provides a hydrolyzing and separation device of methyl acetate and a technique method thereof, which more particularly relates to a novel technique to catalyze and hydrolyze methyl acetate by a reaction bulkhead distillation tower, which can organically combine reaction process, product separation and recovery of no reactant into the tower. A separator extending from the upper part of the tower to the lower part of the tower is arranged on the vertical direction in the conventional distillation tower, the upper part of one side of which is covered and the other side of which is filled with a catalyst; therefore, the inner space of the reaction bulkhead distillation tower is divided into five regions with different functions. The hydrolyzing and separation device of methyl acetate can fully unleash the advantage of bulkhead tower and reaction distillation, and can cause hydrolysis reaction, product separation and recovery of non reactant to be realized in the same tower. The device provided by the invention and the technique process thereof can obtain the methyl acetate with 60 percent to 99.99 percent hydrolysis rate and products with high purity, restrain side effect effectively, reduce the volume of equipment markedly, simplify process, and reduce energy consumption and operation cost.

The invention provides an AALOO multipoint water feeding synchronization denitrification and dephosphorization process. All pretreated wastewater Q1 enters an anaerobic tank, then flows through an anoxic tank, a low oxygen tank, a short-term aerobic tank and a precipitation tank sequentially, and then is discharged from the precipitation tank. Partial pretreated wastewater Q2 directly enters the low oxygen reaction tank, then flows through the short-term aerobic tank and the precipitation tank sequentially, and then is discharged from the precipitation tank. One part of precipitated sludge flows back to the anaerobic tank, and the other part of the precipitated sludge is discharged from the precipitation tank as excess sludge. Mixed liquid return channels are arranged between the low oxygen reaction tank and the anoxic tank, and the mixed liquid return channels are also arranged between the short-term aerobic tank and the low oxygen reaction tank. A returned sludge contact reaction region is arranged on the front end of the anaerobic tank, and water feeding points are arranged both on the front end region and the rear end region of the anaerobic tank. The method has a simple flow, and is adaptable to wastewater quality change, and is capable of removing nitrogen and phosphorus from wastewater with low carbon source and low oxygen consumption. The method is applicable to rebuilding or building of a municipal wastewater treatment plant which has nitrogen and phosphorus removing requirements.

An axial and radial cross flow moving bed adsorption reactor and an activated coke flue gas desulfurization and denitration technology thereof are used for realizing the purposes that SO2, NOx, mercury, dioxin and other pollutants in flue gas are unitedly removed and integrally purified in an adsorption reactor, and belong to the technical field of comprehensive waste flue gas treatment. The adsorption reactor is a combined type double-section double-inverse U-type axial and radial cross flow moving bed, awherein desulfurization area is arranged at a lower section of the axial and radial cross flow moving bed, an annular internal activated coke particle layer and an annular external activated coke particle layer are arranged, and the desulfurization area is divided into a coarse desulfurization area and a fine desulfurization area; a denitration area is arranged at an upper section of the axial and radial cross flow moving bed, and an activated coke particle layer is arranged; an ammonia spray pipe is arranged between the upper section and the lower section; and flue gas is filled along a double-port counter annular gas flow channel structure, the flue gas of the lower section centripetally flows to be desulfurized, and the flue gas of the upper section centrifugally flows to be denitrated. According to the reactor and the technology, desulfurization and denitration are realized in one adsorption reactor, so the adsorption reactor has the advantages of efficient utilization of activated coke, uniform flue gas mixing, sufficient gas-solid contact, stability and reliability in operation, operation cost saving and the like.

The invention discloses an integrated oxidation ditch and a construction and operation method thereof. The construction and operation method has the technical proposal that the integrated oxidation ditch is divided into an anoxic zone, an anaerobic zone and an aerobic zone, which are communicated mutually, the anoxic zone and the anaerobic zone are arranged at one end of the integrated oxidation ditch in common, the aerobic zone is arranged at the other end of the integrated oxidation ditch, and a water-retaining wall is arranged at the middle part of each zone to cause each zone to be formed a single annular channel, water inlet pipes used for feeding water by the division point way are arranged at the anoxic zone and the anaerobic zone, an aeration device is arranged in a circulation channel at one side of the aerobic zone communicated with the anoxic zone, and a mud-water separation device used for the mud-water separation and the water emission is built on the side wall of the aerobic zone for the water emission. The aeration device is started, and the sewage passes through the anoxic zone, the anaerobic zone, the aerobic zone, and the mud-water separation device in sequence, so the dephosphorization and the denitrification as well as the decarbonization treatments of the sewage are realized. The integrated oxidation ditch has the advantages of simple structure, lower cost, small occupation area, and good sewage treatment effect, and can particularly and effectively perform the dephosphorization and the denitrification simultaneously.

The invention discloses a solar rural domestic sewage treating device and a technique thereof. The solar rural domestic sewage treating device comprises a sewage anaerobe treating tank, a facultativeaerobe treating tank, a solar aeration system and a sludge return system, wherein the solar aeration system consists of a solar panel, a storage battery, an aeration machine and an aeration pipe. Thesewage to be treated automatically flows into the anaerobe treating tank hung with fillers from a water inlet, then is discharged after being treated, then reflows into the facultative aerobe treatingtank equipped with the solar aeration pipe, is discharged after being treated, is precipitated by a secondary precipitation tank and then is discharged. The solar panel collects and converts solar energy into electric energy which is stored in the storage battery, and drives the aeration machine to aerate for the facultative aerobe treating tank by the storage battery; and simultaneously, a sludge return pump of the secondary precipitation tank provides energy by the storage battery and carries out sludge returning. Therefore, the invention not only effectively utilizes natural energies, butalso reduces operating cost, improves the degree of the rural domestic sewage treatment and provides a novel rural domestic sewage treating technique.

The invention provides a method for processing a collecting tube of a heat exchanger, which is characterized in that: 1) the collecting tube is limited between a demoulding press block and a lower base, one or more sets of punching knives are arranged in the vertical direction right above the collecting tube, and one end of the collecting tube is connected with a slide block; and 2) when the punching knives press downward, and after one or more punching holes are punched, the punching knives move upward to be lifted, the slide block drives the collecting tube to move toward the front end, by taking the hole spacing of the collecting tube as a stepping stroke, when the collecting tube reaches the punching position of the next punching hole, the punching operation is repeated until all punching holes are punched. The inside of the collecting tube is provided with a core rod in order to avoid the inward caving of the punching holes. The method has the advantages that: the operating process is simple; and the size of the punching knives can be flexibly replaced according to the actual size of the punching holes, and the hole spacing of the punching holes is adjusted by the stepping distance of the slide block, so that the method is suitable for processing collecting tubes of the heat exchangers in different specifications as well as the mechanical mass production, and simultaneously saves a great deal of mould cost, punching equipment cost and operational cost.

The siphoning automatic aerating biofilter includes filter basin with filtering material, inlet channel, water outlet weir and timing water tank. It has also water outlet pipe connected to the lattices of the filter basin and water outlet tank, draining siphon pipe connected to the water seal well, water inlet siphon pipe connected to the water inlet channel, auxiliary water inlet siphon pipe connected to the water inlet siphon pipe, water inlet exhaust pipe, water inlet siphonage eliminating pipe, auxiliary water drainage siphon pipe connected to the draining siphon pipe, draining exhaust pipe, draining siphonage eliminating pipe, etc. The present invention has the advantages of completely hydraulic controlling, easy running, no need of clear water tank, no need of back flush pump, low cost, etc.

The invention discloses a forward osmosis absorption liquid using and recycling method and a forward osmosis absorption device, and belongs to the field of water treatment. According to the forward osmosis absorption liquid using and recycling method, raw material liquid is absorbed by the absorbing liquid in a forward osmosis device, so that in a raw material liquid concentration process, the absorbing liquid is an inorganic saline water solution and comprises dissolved sodium sulfate; the concentration of sodium sulfate is greater than 20wt%, and the temperature is 35-45 DEG C; the osmosis pressure of the absorbing liquid is 110-150bar; the recycling of the absorbing liquid comprises the processes of cooling crystallization and concentration recycling. By the use of the characteristic that the sodium sulfate solution is greatly different in dissolving degree due to different temperatures, the high-concentration sodium sulfate solution is used as the absorbing liquid, so that the concentration factor of the raw material liquid is increased as much as possible; when the absorbing liquid is recycled, a cooling crystallization device is added, and the concentration of sodium sulfate is reduced; under a condition of relative low pressure, the absorbing liquid is recycled by nano filtration or/and reverse osmosis concentration, and therefore, the energy consumption is low, and the cost is low; the investment and operation cost of equipment is lowered.

The invention relates to a continuous suspended dirt filtering device and a filtering and back-flushing method. Traditional sand filtration devices comprise rapid filter tanks, double-layer filter tanks and pressure filters, are in multiple forms but have common problems, namely halting back-flushing problems that filtering mediums are fixed in the filtering process and are blocked by suspended solids after being used for filtration for a period of time, the filtration speed is reduced, the filtration resistance is increased, and the water production capacity is reduced. The continuous suspended dirt filtering device comprises a sand filtration tank (10) connected with a clean water outlet pipe (3), wherein the clean water outlet pipe is connected with a sand-water separator (7), the sand-water separator is connected with a dirt discharging pipe (2) and an air sand lifting pipe (4) respectively, the air sand extraction pipe is connected with a water inlet pipe (1), an air lifting pump(9) and a water inlet distribution pipe (5) respectively, and the water inlet distribution pipe is connected with a backflow sand hopper (6). The continuous suspended dirt filtering device is appliedto the further purification of sewage in the subsequent sewage treatment process.

The invention provides a device and a method for biological denitrification of landfill leachate through SBR (Sequencing Batch Reactor) short-cut nitrification-SBBR anaerobic ammonia oxidation combined process (Sequencing Batch Biofilm Reactor), belongs to the technical field of biological denitrification, and is applicable to waste water with high ammonia nitrogen and a low carbon nitrogen ratio (C/N). The device provided by the invention is provided with SBR and SBBR. The SBR reactor is mainly used for a short-cut nitrification reaction, and hereinafter referred to as SBRSBNR; the SBBR reactor is mainly used for an anaerobic ammonia oxidation reaction, and hereinafter referred to as SBBRANAMMOX. The raw liquor of the leachate is mixed with SBBRANAMMOX effluent reflux at first and then fed into the SBRSBNR for denitrification; the raw liquor of the leachate can be diluted, and partial nitric nitrogen in water also can be removed by taking full advantage of the carbon source in the raw water. Next, the effluent of the SBRSBNR is further mixed with the raw liquor of the leachate, and fed into the SBBRANAMMOX for an anaerobic ammonia oxidation-denitrification synchronous denitrification reaction; consequently, synchronous removal of nitrogen and COD (Chemical Oxygen Demand) is realized. The system removal rate of COD is 91%, the removal rate of TN is greater than 97.5%, and the total nitrogen load of the SBBRANAMMOX is about 0.7 Kg TN/m<3>.

The invention provides a slack coal pressure gasification wastewater resourceful treatment method. The treatment method sequentially comprises the following steps of: (1) performing oil-water separation on the wastewater to obtain wastewater after the oil-water separation treatment; (2) treating the wastewater obtained by the step (1) by use of active sludge, and performing mud-water separation to obtain wastewater after the active sludge treatment; (3) adding an adsorbent into the wastewater obtained by the step (2), and performing solid-liquid separation to obtain wastewater after the adsorption separation treatment; (4) adding a flocculating agent and/or flocculation aid into the wastewater obtained by the step (3), and precipitating to obtain wastewater after the coagulation clarifying treatment; and (5) treating the wastewater obtained by the step (4) by use of a filter material loaded with microorganisms to obtain dischargeable/recyclable water. The invention also provides a system for the method to realize resourceful treatment on the wastewater, and application of the treatment method or treatment system in treating slack coal pressure gasification wastewater.

The invention relates to an integrated submarine cable laid at seabed, to transmit water, gas and oil, which combine the optical unit, electric cable, high-frequency cable, data cable, and signal cable, wherein the invention is characterized in that: the center is the tube transmitting water, gas and oil; the outer one is the protective layer; the integrated cable layer twisted on the outer layer comprises optical unit, electric cable, high-frequency cable, and data cable; the metallic sheath layer, armored steel layer, polypropylene protective layer and non-weave cloth; the space between the tube, integrated cable and armored steel are filled with pitch. The invention can be used to transmit water, oil, gas, electricity and data to the island, natural gas platform, etc, to reduce cost.

The invention discloses a stainless steel liquid waste regeneration system based on the spray roasting method.The system comprises an adsorption tower, a jet cleaning tower, a spray cooling tower, an oxidizing tower and a denitration device which are connected in sequence, wherein a spray liquid outlet of the jet cleaning tower is communicated with a first spray liquid inlet of the jet cleaning tower and a spray liquid inlet of the adsorption tower through pipelines, a spray liquid outlet of the spray cooling tower is communicated with a spray liquid inlet of the spray cooling tower and a second spray liquid inlet of the jet cleaning tower through pipelines, a spray liquid outlet of the oxidizing tower is communicated with a spray liquid inlet of the oxidizing tower and a chamber of the jet cleaning tower through pipelines, a jet cleaning pump is installed on a pipeline at the position of the spray liquid outlet of the jet cleaning tower, a spray cooling pump and a spray cooling circulating liquid cooler are installed on a pipeline at the position of the spray liquid outlet of the spray cooling tower, and an oxidizing tower pump and an oxidizing tower circulating liquid cooler are installed on a pipeline at the position of the spray liquid outlet of the oxidizing tower.By the adoption of the system, HNO3 recovery rate is increased.

The invention relates to a water treatment system, in particular to a method and a system for concentrating high-salt mine well water, and belongs to the technical field of coal mine water treatment.The method comprises the following steps: firstly, pretreating the high-salt mine well water to remove oil, suspended matters and colloid pollution factors; allowing effluent to enter a first-stage reverse osmosis system; feeding concentrated water of the first-stage reverse osmosis system to a first-stage hardness and silicon removal system to be subjected to hardness and silicon removal treatment; allowing effluent to enter a second-stage reverse osmosis system; feeding second-stage reverse osmosis concentrated water to a second-stage hardness and silicon removal system to be subjected to hardness and silicon removal treatment, and feeding effluent to an ED membrane system. The first-stage reverse osmosis system and the second-stage reverse osmosis system are both fed into a recycling water tank. According to the method, the recovery rate of the concentration section can reach 98%, the TDS of concentrated water after concentration can reach 150 g/L-200 g/L, compared with a conventional concentration mode, the method reduces the subsequent evaporative crystallization scale by 1/2-3/4, and the method has the advantages of being low in investment and low in operation cost.

The present invention relates to a carbon disulfide waste gas dehydrosulfurization process and its dehydrosulfurization equipment. It is mainly characterized by that said dehydrosulfurization adopts tubular absorber with spray head in stead of general spray-type absorption tower, so that the H2S removing rate can be up to 99.5%-100%.

The invention discloses an integrated ventilation cooling heat recovery device. The device comprises an enclosed ventilation system, a single refrigeration system and a heat recovery refrigeration system, wherein the enclosed ventilation system comprises an air return segment, an air delivery duct, an air inlet filter, heating equipment and an air return duct which are connected to form a circulation air duct, the single refrigeration system and the heat recovery refrigeration system comprise a single refrigeration circulation system, a heat recovery refrigeration circulation system, a heating circulation system and a spraying circulation system, the enclosed ventilation system is used for realizing heat circulation of residual heat of the heating equipment, the single refrigeration circulation system and the spraying circulation system are utilized to remove a part of heat radiated by the heating equipment, the heat recovery refrigeration circulation system and the heating circulation system are utilized to realize recovery of the residual heat, and thereby economical heat exhaust and residual heat recovery of the equipment are realized. The device is advantaged in that water cooling risks can be avoided, problems of the poor air cooling effect and non-economical operation can be solved, environment noise of the equipment can be effectively controlled, and investment and operation cost are saved.

The invention provides a method for biofiltration processing of soot exhaust gas on basis of roofing greening nutritive soil, comprising the following steps: taking roofing greening vegetation and the nutritive soil thereof as biological filler; arranging a supporting layer and a gas distribution device below the biological filler; spraying nutrient solution onto the biological filler; and when liquid phase pH is 6.0-7.5 and temperature is 20-35 DEG C, processing soot exhaust gas. The method of the invention has the advantages of large biomass, high mass transfer efficiency, small possibility of blocking, easy operation and control and the like; the invention expands the application of the roofing greening engineering, combines roofing greening with the processing of soot exhaust gas with a biological method and saves operation cost and floor space.

The invention discloses a sequencing-batch polluted soil remediation method and device. The sequencing-batch remediation device comprises an electrochemical remediation pond, a pipe-type mixer, remediation electrodes, clamping grooves, a cathode region control valve, an anode region control valve and perforated pipes, wherein polluted soil is arranged in the remediation pond, and then pollutants in the soil are effectively removed by adjusting electrochemical parameters of the system. The used remediation electrodes are convenient to install, good in permeability and large in surface area, an oxidant adding pipe is arranged between the two electrodes, is unlikely to be lost under the action of a filtering membrane, and is collected near the electrodes for reaction to remove the pollutants, so that the sewage treating effect is improved and the sewage treating time is shortened. The method and the device disclosed by the invention have the advantages that the operation is convenient, the structure is simple, the cost for operation and maintenance is greatly saved, and the remediation work of the polluted soil is more effective and more stable.

The present invention discloses an inhibition ethanediol antifreezing fluid, comprising the following components, by mass percentages: 94% to 99% of ethanediol compound, 0.5% to 5% of sylvite, 0.001% to 1% of azole compound and 0.001% to 0.015% of water-soluble dye. By adding sylvite into the antifreezing fluid, the invention enables the antifreezing fluid to have high concentration of potassium ion, improves the usefulness of bacteriostasis and antiscale of the antifreezing fluid effectively; and by the optimization combination with other constituents, the antifreezing fluid provided by the invention achieves the effects of anticorrosion, antiscale and bacteriostasis throughout the year; prolongs the service life of system is substantially and saves the equipment cost and the operation cost. The antifreezing fluid also achieves the advantages of stable performance, nontoxicity, innocuousness, low cost and wide usage temperature scope; can be used at the temperature from -50 DEG C to 120 DEG C, is antifreeze in winter and anti-boil in summer.

The invention discloses a continuous absorption method of byproduct hydrogen chloride gas in a chlorination reaction, which comprises the following steps: allowing impurity-containing hydrogen chloride gas generated in the chlorination reaction to pass through a concentrated hydrochloric acid washing tank, sufficiently mixing the gas with concentrated hydrochloric acid, and washing to remove impurities; continuously feeding the washed hydrogen chloride gas into at least two stages of falling film absorption towers which are arranged in series, spraying and absorbing stage by stage, and feedingthe gas into a packing absorption tower for further absorption; allowing fresh absorption water to enter from the top of the packing absorption tower and sequentially flow through the packing absorption tower and the at least two stages of falling film absorption towers in a countercurrent mode, and feeding hydrochloric acid after absorption into a hydrochloric acid storage tank; allowing gas discharged from the top of the packing absorption tower to enter a spray tower again so that the gas is sprayed and absorbed by fresh absorption water and residual hydrogen chloride gas is further absorbed and then discharging at high altitude. According to the method, continuous absorption can be realized, no water-soluble impurities exist in the hydrochloric acid after absorption, and the absorption efficiency is high.

The invention discloses a penicillin waste water biological enhancement treatment device and method, and belongs to the technical field of waste water treatment and environmental protection. According to the device, the characteristics of multiple sewage treatment devices such as a sequencing batch type reactor, a membrane bioreactor and a moving bed bio-membrane reactor are integrated; the device mainly comprises a hydrolytic acidification area, a moving bed bio-membrane area provided with suspended filler, and a deep treatment area provided with a membrane assembly and suspended filler. The hydrolytic acidification area is used for pretreating waste water, improving biodegradability of the penicillin waste water and degrading a part of pollutants, and the deep treatment area is a main penicillin waste water biological treatment system. According to the penicillin waste water biological enhancement treatment device and method, the treatment efficiency of the penicillin waste water can be effectively improved, the occupied area can be reduced, the effluent quality can be kept stable, the service life of an aerating device and the membrane assembly can be prolonged, maintenance and operating cost can be reduced, and the penicillin waste water biological enhancement treatment device and method are especially suitable for treating the antibiotic waste water with large water quality and amount changes.

The invention relates to a method for treating acid wastewater from a viscose plant. The method comprises the following steps: pretreating acid wastewater; treating the pretreated acid wastewater by using a membrane filtering concentration system, performing filtration concentration on the acid wastewater, and recycling filtrate to a viscose production system; performing further evaporation concentration through an evaporation system on an acid wastewater concentrated solution separated by using the membrane filtering concentration system, and recycling a final concentrated solution and generated condensed water into the viscose production system. By adopting the method, acid wastewater discharged from the viscose plant is treated for water circulation, and sulfuric acid and sulfate in viscose can be recycled. The salt content of water discharged from the viscose plant can be reduced, and the sewage treatment cost and the production cost can be reduced.

The invention discloses an improved regulating reservoir for low carbon treating and recycling process of ash water. The regulating reservoir consists of a regulating reservoir main body, a regulating reservoir cover plate, a reservoir bottom mud storing groove, a vertical vent pipe and a hair collector, and has the functions of adjusting water amount, balancing water quality, settling high-specific-weight pollutants, storing primary sludge and residual sludge, safely exhausting gas produced in the regulating reservoir, and the like. In the improved regulating reservoir, a grate, a pre-aeration pipe of the regulating reservoir and a sludge treating facility used in the conventional recycled water treatment process are eliminated, so that corresponding construction investment and running cost are lowered, the load of subsequent treatment of ash water is lowered, and the influences of ash water treatment and sludge treatment facilities on buildings and housing estates are lowered; the regulating reservoir cover plate and the vertical vent pipe are arranged, so that safe exhaust of waste gas produced in the regulating reservoir is ensured; the mud storage groove which is used for storing ash water primary sludge and residual sludge produced in subsequent treatment is additionally arranged; and the hair collector is additionally arranged, so that the influence of floating materials and larger particles in the ash water on a subsequent treatment process is lowered.

The invention discloses a packing coupling denitrification device and method for rural domestic sewage treatment. The device comprises an aeration tank, an iron-carbon biological denitrification tankand a sedimentation tank which communicate with one another in sequence; the aeration tank communicates with a sewage inlet pipeline; a biofilm Yulong filler and an iron-carbon filler are respectivelyarranged in the aeration tank and the iron-carbon biological denitrification tank; a flow guide plate is arranged at the communication position of the aeration tank and the iron-carbon biological denitrification tank; an air inlet main pipe separately communicates with the aeration tank and the iron-carbon biological denitrification tank and extends into the bottom of the biofilm Yulong filler and the bottom of the iron-carbon filler; the upper part of the aeration tank and the iron-carbon biological denitrification tank are respectively provided with exhaust holes; and a water outlet pipe and a sludge discharge pipe are arranged on the side wall of the sedimentation tank. Biological agents are respectively adsorbed in the aeration tank and the iron-carbon biological denitrification tankin modes of Yulong filler biofilm and iron carbon filler biofilm, so that particulate phosphorus, suspended solid (SS) and heavy-metal ion pollutants in the sewage are removed. The nitrogen and phosphorus removal effect is good, and influence of low C/N ratio on biological denitrification in a sewage treatment process is avoided.

The invention discloses a process for treating high-concentration oil refining wastewater, which mainly comprises the following steps: the oil refining wastewater is subjected to physicochemical pretreatment such as oil removal, air flotation and the like; the pretreated wastewater is delivered to a three-section biochemical treatment system; according to the water quality condition of the wastewater, the biochemical treatment unit of the first section can be switched into a facultative reaction tank or an aerobic reaction tank to correspondingly complete front denitrification reaction or aerobic reaction to remove sulfides; a phosphate is quantitatively added into the biochemical treatment unit of the second section, and organic pollutants such as volatile phenol and the like are mainly removed; the biochemical treatment unit of the third section mainly completes nitration reaction, a mixed solution of sodium hydroxide and sodium carbonate is accurately added, and the alkalinity and the pH value are regulated to create an optimal nitration environment; the biochemical tank of each section is operated in a plug flow manner, and the interior of each tank is of internal-circulation complete mixing manner; and the biochemically treated wastewater is delivered to an oblique tube sedimentation tank, and the bottom sludge of the sedimentation tank is lifted by an air lift device. The system adopting the process discharges clear water and runs stably, and the process is flexible and can adapt to the oil refining wastewater of various concentration.

The invention brings forward lemon vinegar and its preparation method. the lemon vinegar is prepared from the following ingredients, by weight, 70-80% of lemon juice puree, 5-10% of brown sugar, 1-1.5% of pectase, 1-1.5% of mixed yeast strains and 10-17% of an acetic acid nutrient solution. The preparation method has short fermentation period, is simple and easy to operate and can be used to effectively enhance health-care efficacy and added value of the lemon vinegar. In addition, the lemon vinegar can be stable and lasting under the precondition of not adding any chemical preservative and has long storage life.

The invention discloses a method for improving the efficiency of anaerobic digestion of wastewater sludge. The method comprises the following steps: (1) raw sludge generated by wastewater treatment and circulating sludge of an anaerobic digester are mixed, are heated by a heat exchanger, and enter a sludge anaerobic digester; the sludge is digested in the sludge anaerobic digester and constantly stirred in the digestive treatment process; (2) in the process of digestive treatment in the sludge anaerobic digester, the sludge enters an electrolytic cell from the lower part of the sludge anaerobic digester through an electrolytic metering pump to carry out closed electrolytic treatment, and the sludge entering the electrolytic cell every time is not larger than 10 percent of volume of the sludge anaerobic digester; (3) the electrolyzed sludge used as the circulating sludge of the anaerobic digester repeats the processes of the step (1) and the step (2) with the raw sludge, and the circulation is repeatedly carried out. The method has the advantages that compared with the digested sludge not to be electrolyzed, the solid content of the electrolyzed digested sludge is reduced by more than 30 percent, more than 30 percent of sludge quantity is reduced, and the degradation rate of organic matters anaerobically digested by sludge is increased by more than 40 percent.

The invention discloses a constructed wetland sewage treatment method and system, belonging to the technical field of water treatment. According to the invention, sewage passes through a plantation layer and then enters into a pool body through a perforating water distributor; after passing through the perforating water distributor, the sewage uniformly enters into a packing layer comprising novel hexagonal composite filling material modules in the pool body, then the sewage is purified by the combined effect of the physical, chemical and biochemical reaction of hexagonal composite filling material modules and microbes of the hexagonal composite filling material module surfaces, and then the purified sewage is discharged out of the pool body from a perforating water collecting pipe. The operation is simple, no power is consumed, and the operation and maintenance costs are greatly saved, thus the whole constructed wetland sewage treatment system can operate efficiently and stably.

The invention discloses a single-circulation two-stage LNG cold energy power generation and ice making method and system. The single-circulation two-stage LNG cold energy power generation and ice making method comprises the following steps that low-pressure organic working medium steam discharged by a turbo-generator unit and LNG input into an LNG storage tank are subjected to heat exchanging to recover LNG cold energy at the low-temperature stage; medium-pressure organic working medium steam pumped out from the turbo-generator unit and the LNG subjected to primary heat exchanging are subjected to heat exchanging to recover LNG cold energy at the medium-temperature stage; organic working medium liquid formed through heat exchanging liquefying sequentially passes through a working medium-refrigerant heat exchanger, an evaporator and a superheater to be subjected to heat exchanging to become superheating organic working medium steam, and the superheating organic working medium steam is sent into the turbo-generator unit to apply work and generate power; meanwhile the LNG subjected to two-stage heat exchanging is subjected to heat exchanging again to exchange the surplus cold energy at the high-temperature stage, and the LNG subjected to three-time heat exchanging is heated through an LNG heater and then sent to a natural gas outward-transporting pipe network; and refrigerants during three-time heat exchanging return to a refrigerating device to make ice. According to the single-circulation two-stage LNG cold energy power generation and ice making method, the procedure is simplified, investment and the occupied area are reduced, and the heat and operating cost need by LNG gasification can be saved.