230 results about "Acidification - Treatment" patented technology

The invention discloses a biomass nitrogen-doped derivative porous carbon material and a preparation method and application thereof, and belongs to the technical field of photo-thermal atmospheric water catching.The preparation method comprises the following steps that a carbon source and a nitrogen source are put into water to be subjected to an ultrasonic reaction, a reactant is subjected to hydrothermal treatment, and a solid product is obtained; carrying out steam etching and high-temperature annealing treatment on the solid product and metal salt in an inert atmosphere, and then sequentially carrying out acidizing treatment, grinding and drying to prepare the biomass nitrogen-doped derived porous carbon material. The biomass nitrogen-doped derivative porous carbon material prepared by the method has a rich pore structure and efficient adsorption-desorption performance, can replace an expensive MOFs material, optimizes the preparation path, improves the nitrogen doping efficiency and the material stability, remarkably reduces the cost and the environmental burden while ensuring the excellent atmospheric water collection performance, and has a wide application prospect. And the method shows more excellent industrialization prospects and sustainable development values.

Disclosed in the present invention are an acid-resistant noble metal ion adsorption film and a preparation method therefor. The preparation method comprises: a) pretreatment of a base film: firstly, cleaning and drying a silicon carbide substrate to obtain a clean film; then performing oxidation treatment on the clean film to obtain a micro-oxidation film; and finally, placing the micro-oxidation film in a strong acid solution for acidification treatment, to obtain a base film modified with a hydroxyl functional group; b) the growth of an MOF seed crystal: placing the obtained base film modified with the hydroxyl functional group into a seed crystal growth solution, and reacting at 110-130°C for 12-24 hours to obtain a film loaded with the MOF seed crystal; and c) MOF secondary growth: placing the prepared film loaded with the MOF seed crystal into a secondary growth solution, and reacting at 110-130°C for 20-30 hours to obtain the acid-resistant noble metal ion adsorption film. The adsorption film prepared according to the present invention has good acid resistance, and can achieve efficient and stable recovery of rare noble metals in a strong acid environment.

The invention discloses a low-permeability sandstone water locking-water sensitivity synergistic plug removal deep acidizing treatment method which is suitable for a low-permeability sandstone reservoir in an offshore high-temperature and high-pressure environment (120 DEG C, 40 MPa). According to the method, acidizing fluid is adopted, and the acidizing fluid is prepared from 18%-22% of chelating type composite organic multi-element retarded acid HWCP, 1.5%-2.5% of clay stabilizer HTW, 1.5%-2.5% of waterproof locking agent HAR, 18%-22% of pressure reduction cleanup additive HWDA, 5%-7% of corrosion inhibitor HWCI and the balance filtered seawater. The acidizing fluid is prepared by stirring at normal temperature and normal pressure, and stays for 6-12 hours after being injected into a reservoir. The HWCP slowly dissolves blockages, and the acting distance reaches 11 m; the HTW anti-swelling rate is greater than or equal to 90%, and clay expansion is inhibited; the HAR prevents water blocking; secondary precipitation is reduced through HWDA; and the corrosion rate is controlled to be 15.1108 to 26.1274 g / m < 2 >. H through HWCI. According to the method, the permeability of the reservoir is recovered by 122.09%-627.1%, the yield-increasing multiple ratio is 1.60-2.91, and the high efficiency is verified through 7-well-number field application. The method is simple in process, adapts to the marine environment, and comprehensively solves the problems of water locking, water sensitivity and secondary precipitation.

The invention belongs to the technical field of organic and inorganic composite materials, particularly discloses a modification method of hollow glass beads and application of the hollow glass beads in a PU adhesive, and aims to solve the problems of poor storage stability, high viscosity change rate and the like of a composite material due to the fact that the surfaces of the hollow glass beads contain silicon hydroxyl and free alkali metal in the prior art. According to the invention, an alkyl silane coupling agent (such as methyltrimethoxysilane and n-octyltriethoxysilane) which does not contain active hydrogen is adopted to carry out surface modification on hollow glass beads. The method comprises the following specific steps: S1, acidizing microspheres with a hydrochloric acid solution to remove surface metal ions; and S2, hydrolyzing the alkylsilane coupling agent, and bonding the hydrolyzed alkylsilane coupling agent with silicon hydroxyl on the surface of the microbead. The compatibility of the obtained modified microbead and an isocyanate prepolymer is remarkably improved, the viscosity change rate is low, and the curing phenomenon is avoided. The preparation method is simple in process and low in cost, and can be widely applied to the fields of coatings, adhesives and lightweight composite materials.

The invention provides a hydrolysis-acidification-precipitation integrated device, relates to the technical field of sewage treatment, and solves the technical problems of large occupied area and large investment cost of a hydrolysis-acidification treatment system in the prior art. The hydrolysis-acidification-precipitation integrated device comprises a tank body provided with an inner cavity; the water inlet device is used for conveying sewage needing to be treated to the bottom of the inner cavity of the tank body; the stirring device is used for mixing the activated sludge and the wastewater; the precipitation device is used for separating sludge and sewage, discharging residual sludge and automatically refluxing activated sludge into the hydrolytic acidification reaction area of the tank body; and the water outlet device is used for discharging the treated sewage. The functions of hydrolytic acidification, precipitation, automatic backflow and the like are integrated in one tank body, so that the requirement for an additional precipitation tank is reduced, the occupied area of the system is remarkably reduced, and the system is more suitable for the urban environment with shortage of land resources.

The invention discloses a thickening suspending agent containing modified attapulgite and application of the thickening suspending agent, and belongs to the technical field of thickening suspending agents. After acidification treatment, the content of impurities on the surface of attapulgite is reduced, the surface area and the porous property are increased, the load rate of zero-valent iron can be increased, and the utilization rate of the zero-valent iron is increased. Zero-valent iron is uniformly loaded on tubular pore channels or the surface of attapulgite in the form of nano-particles, so that the surface roughness of the composite powder is increased, stronger steric hindrance can be formed around pesticide particles, and the pesticide particles are prevented from being gathered and enlarged due to collision, so that sedimentation is reduced, and the composite powder has good suspension property and dispersity; the load of zero-valent iron can endow the thickening suspending agent with the heavy metal chelating capability; through two times of intercalation treatment, the modified zero-valent iron composite attapulgite powder can be uniformly loaded between graphene oxide layers, the graphene oxide can assist the dispersion of the attapulgite to avoid agglomeration, and the existence of the graphene oxide can improve the thermal stability of the thickening suspending agent.

The invention provides a purification method and application of a coal-based hard carbon material, belongs to the technical field of lithium / sodium ion battery negative electrode materials, and overcomes the defects that according to an existing purification method, the ash content is lower than 3%, the iron content is lower than 400 ppm, and the requirements are difficult to meet. Turning over the materials and reacting for 3.8-4.2 hours in a boiling state; acidizing: mixing an acid solution, and reacting for 2-8 hours at the temperature of 60-100 DEG C; the mixed acid solution comprises hydrochloric acid with the volume concentration of 10%-30% and hydrofluoric acid with the volume concentration of 0.5%-8%; according to the high-purity coal-based hard carbon material and the preparation method thereof, purification and deep impurity removal can be cooperated, the original coal ash content higher than 8% can be reduced to lower than 1%, and the iron content of the high-purity coal-based hard carbon material is lower than 100 ppm.

The invention discloses a biochar-loaded silicate composite material as well as a preparation method and application thereof. The preparation method provided by the invention comprises the following steps: mixing acid liquor of inorganic acid with biomass, stirring the obtained mixed liquor at 85-95 DEG C until the mixed liquor is evaporated to dryness, and preparing acidified biomass; mixing the acidified biomass with a silicate precursor solution to prepare an acidified biomass loaded silicate composite material; and carrying out carbonization treatment on the acidified biomass loaded silicate composite material to obtain the charcoal loaded silicate composite material. According to the preparation method disclosed by the invention, the biomass is subjected to specific acidizing treatment in advance, so that the prepared biochar-loaded silicate composite material has the effects of short-term removal of cationic heavy metals and long-term soil stability, and has a good treatment effect on cationic heavy metals with different occurrence forms.

The invention relates to the field of high polymer materials, and discloses an antistatic polyether-ether-ketone composite material for semiconductor devices, the antistatic polyether-ether-ketone composite material comprises the following raw materials by weight: 60-70 parts of polyether-ether-ketone, 20-30 parts of polyetherimide, 3-5 parts of modified carbon nanotubes, 2-4 parts of nano core-shell particles, 0.5-1 part of a coupling agent, and 0.2-0.5 part of an antioxidant; the modified carbon nanotubes are obtained by acidizing carbon nanotubes and grafting imidazolyl quaternary ammonium salt on the surfaces of the acidized carbon nanotubes; according to the antistatic polyether-ether-ketone composite material, through blending of polyetherimide, the melt viscosity of a composite system can be reduced, the problems that polyether-ether-ketone is high in processing temperature and poor in flowability are solved, and the antistatic performance of the composite material is improved. Through the synergistic interaction of the added modified carbon nanotubes and nano core-shell particles, the material is endowed with excellent mechanical properties, wear resistance and antistatic properties.

The invention belongs to the technical field of fuel cell membrane electrode preparation, and particularly discloses a preparation method for improving fuel cell catalyst layer ionomer distribution, which comprises the following steps: placing a carbon nanotube in dilute nitric acid, carrying out uniform ultrasonic dispersion, then carrying out oil bath heating, carrying out continuous acidification treatment, then carrying out suction filtration, and drying to obtain a carbon nanotube catalyst layer; carbon nano tube powder subjected to acidizing treatment is obtained; mixing the acidized carbon nanotube powder with a Nafion solution in proportion, and removing a solvent through rotary evaporation to obtain a carbon nanotube-Nafion compound; mixing the carbon nanotube-Nafion compound with a commercial Pt / C catalyst, deionized water and ethanol in proportion, and performing ultrasonic treatment under an ice bath condition to obtain uniformly dispersed cathode catalyst slurry; and spraying the uniformly dispersed cathode catalyst slurry on the cathode side of the proton exchange membrane to obtain the catalyst layer for improving ionomer distribution.

A low capital and environmentally friendly process of extracting materials from slurries. The method includes adjusting a unique parameter determined based on the modified alkalinity in a quantity of the slurries to a preset value independent of the pH. Interactions of the anionic reactant species with lithium within the slurries causes a solid form of the material to precipitate out of the slurries. After the solid separation, the spent liquid may be returned to underground surface water systems or transported to a storage.

The invention discloses an acid-base neutralizer reproduced from wax gourd waste, which is prepared from the following raw materials in percentage by mass: 10% of potassium polyacrylate polymer, 10% of hydrolytic polymaleic anhydride, 15% of sesbania gum, 40% of humic acid, 25% of CMC (Carboxymethyl Cellulose) gum and the balance of acidified melon water serving as a solvent, the acidified melon water is obtained by acidifying wax gourd waste and diluting the acidified wax gourd waste by 100-300 times. The invention relates to the technical field of environmental engineering and resource recycling, in particular to an acid-base neutralizer reproduced from wax gourd waste and a preparation method thereof, and due to the adoption of the technical scheme, the acid-base neutralizer has the following advantages that the limitation of a traditional acid-base neutralizer, the application bottleneck of a natural base material and the pain point of waste recycling are solved.

The invention discloses a high-purity and low-damage single-walled carbon nanotube purification method which comprises the following steps: carrying out mechanical shearing treatment on a single-walled carbon nanotube to disperse the single-walled carbon nanotube and open a tube bundle structure to obtain a sheared single-walled carbon nanotube; carrying out pre-oxidation on the sheared single-walled carbon nanotube in a weak oxidizing atmosphere to obtain a pre-oxidized single-walled carbon nanotube; carrying out microwave treatment on the pre-oxidized single-walled carbon nanotube or the acidified single-walled carbon nanotube in an inert atmosphere to obtain a single-walled carbon nanotube subjected to microwave treatment; and acidizing the single-walled carbon nanotube subjected to microwave treatment to obtain the acidized single-walled carbon nanotube. The method is simple in process, mild in condition, easy to amplify and suitable for industrial production. The purity of the obtained single-walled carbon nanotube is higher than 99%, the raman spectrum IG / ID ratio is larger than 150 and higher than that before purification, and the single-walled carbon nanotube is high in structural integrity and suitable for the fields of high-performance composite materials, electronic devices, energy storage and the like.

This application discloses a biochar-supported silicate composite material, its preparation method, and its application. The preparation method includes the following steps: mixing an inorganic acid solution with biomass, stirring the resulting mixture at 85℃~95℃ until it evaporates to dryness, to prepare acidified biomass; mixing the acidified biomass with a silicate precursor solution to prepare an acidified biomass-supported silicate composite material; and carbonizing the acidified biomass-supported silicate composite material to obtain the biochar-supported silicate composite material. The preparation method of this application, by pre-treating the biomass with a specific acidification process, enables the prepared biochar-supported silicate composite material to achieve both short-term removal of cationic heavy metals and long-term soil stability, and it exhibits good remediation effects on cationic heavy metals in different occurrence forms.

The invention discloses a coffee fresh fruit primary processing wastewater treatment process and a wastewater treatment system, and belongs to the technical field of wastewater treatment. The method comprises the following steps: preliminarily filtering coffee processing wastewater; feeding the preliminarily filtered wastewater into a polysaccharide reactor, adjusting the pH value to 7-9, stirring, and flocculating and precipitating to complete pretreatment; s3, carrying out regulation-hydrolytic acidification on the pretreated coffee wastewater, carrying out hydrolytic acidification on macromolecular organic substances in the wastewater, and standing for solid-liquid separation; s4, carrying out oxidation-reduction reaction on the coffee wastewater subjected to hydrolytic acidification treatment; then carrying out anaerobic reaction on the coffee wastewater subjected to the micro-electrolysis reaction to degrade organic matters, and carrying out three-phase separation on solid, liquid and gas; then carrying out an anoxic / aerobic reaction on the coffee wastewater subjected to the anaerobic reaction treatment; and then carrying out ozone / UV catalytic oxidation on the coffee wastewater after the nitrification anoxic / aerobic reaction. According to the method, microelectrolysis and biological treatment processes are combined, the acidic polysaccharide and pectin comprehensive wastewater belongs to high-difficulty wastewater, and pollutants in high-concentration coffee fresh fruit primary processing wastewater are effectively degraded.

The application provides an antimony-based composite negative electrode material and a preparation method and application thereof, and relates to the technical field of new energy batteries.The preparation method provided by the application comprises the following steps: mixing antimony metal powder with amorphous carbon, ball-milling, drying and calcining to obtain an antimony-based intermediate; performing acidification treatment on the surface of carbon nanotubes to obtain acidified carbon nanotubes, dispersing the acidified carbon nanotubes in an organic sodium modified solution, stirring, filtering, drying to obtain modified carbon nanotubes; mixing and dispersing the antimony-based intermediate, sodium polyacrylate and the modified carbon nanotubes to obtain a suspension, and then performing spray drying to obtain the antimony-based composite negative electrode material.The preparation method provided by the application can improve the problem of performance decline caused by the capacity attenuation of the antimony metal due to the huge volume expansion in the process of deintercalating sodium ions, and effectively improves the electrochemical performance of the antimony-based negative electrode material.

The present invention provides a method for recovering iodine and boric acid from iodine-containing waste liquid. The method includes: subjecting the iodine-containing waste liquid to primary acidification after pretreatment, followed by solid-liquid separation to obtain boric acid and iodine-containing solution; sequentially performing secondary acidification and oxidation on the iodine-containing solution to obtain a solid-liquid mixture containing iodine and boric acid; adjusting the pH value of the solid-liquid mixture with alkali and then performing solid-liquid separation to obtain iodine and a salt-containing solution; subjecting the iodine vapor generated during the reaction to condensation and spray absorption in sequence, and returning the condensed iodine for co-recovery. The method of the present invention first precipitates boric acid through acidification treatment according to the composition of the iodine-containing waste liquid, recovers the boric acid product, and then obtains a high-purity iodine product through further acidification and oxidation reactions; the present invention condenses and spray-absorbs the iodine vapor to avoid iodine loss and possible environmental pollution, and ensures the iodine recovery rate; the method is simple to operate, has mild conditions, low cost, and realizes the resource utilization of the waste liquid.

The application belongs to the technical field of capacitive deionization desalination, and relates to an electrode felt for capacitive deionization and a preparation method thereof. The preparation comprises the following steps: dissolving PAN and acetylated lignin into a homogeneous spinning solution by using DMF and DMSO double solvents, and then electrospinning to obtain a carbon fiber precursor; then, under a nitrogen atmosphere, the precursor is subjected to pre-oxidation, carbonization and CO2 activation treatment; finally, the obtained material is subjected to acidification treatment to obtain the electrode felt for capacitive deionization with a high specific surface area. The method has a wide raw material source and low cost. The specific pre-oxidation, carbonization and carbon dioxide etching process are combined with each other, so that the prepared electrode felt has a high specific surface and a high capacitive deionization effect.

The invention relates to the technical field of organic waste resource utilization, and discloses a method for co-production of lactic acid and crude grease by using perishable garbage, and the method comprises the following steps: step a, preparing the perishable garbage into slurry; b, feeding the slurry into an electrochemical reactor for electrochemical treatment; c, carrying out acidification treatment on the generated fatty acid salt to recover crude oil; and step d, carrying out lactic acid fermentation on the residual liquid rich in the small molecular sugar after the crude oil is recovered to obtain the lactic acid. The anode region and the cathode region which are separated by the ion selective diaphragm are arranged in the electrochemical reactor, and acid and alkali are respectively generated in situ in the two regions by utilizing water electrolysis and are directly used for hydrolysis of polysaccharide and saponification of grease, so that chemical reagents such as sulfuric acid and caustic soda do not need to be additionally added; the introduction of extra impurity ions such as sulfate radicals and sodium ions into the system is avoided, the load of subsequent product separation and wastewater treatment is reduced, and the process flow is simplified.

The invention discloses a magnetic nanoparticle anchored heterogeneous carbon-based heat-conducting and wave-absorbing integrated material and a preparation method thereof, and belongs to the field of functional composites.The preparation method comprises the steps that melamine foam is acidized, and then acidized MF is soaked into a zinc salt, cobalt salt and 2-methylimidazole methanol solution; the obtained MF (at) ZnCo-ZIF is subjected to high-temperature calcination, and the heterogeneous carbon-based heat conduction and wave absorption integrated material anchored by the Co magnetic nanoparticles is obtained. The Co magnetic nanoparticle anchored heterogeneous carbon-based heat-conducting and wave-absorbing integrated material has the advantages of controllable morphology, high heat conductivity and strong wave-absorbing performance through the synergistic strengthening effect of the high-graphitization heterogeneous carbon material with high heat / conductivity and high dielectric loss and the Co magnetic nanoparticles with high magnetic conductivity and high magnetic loss; actual requirements of different scenes can be met, and a new thought is provided for research and development of a high-performance heat-conducting and wave-absorbing integrated material.

The invention provides a modular rural sewage-biogas-fertilizer co-production system based on micro-aerobic circulation, which comprises a water distribution unit, a plurality of treatment units and a co-production unit, the water distribution unit comprises a distribution box and a plurality of partition plates fixedly connected with the inner wall of the distribution box, the plurality of partition plates divide the distribution box into a plurality of water storage areas, and the water storage areas are communicated with the treatment units. The water storage areas are provided with preset water levels, and the partition plates are provided with through grooves for communicating the two adjacent water storage areas at the elevation positions of the preset water levels. The treatment units are communicated with the water storage areas in a one-to-one correspondence mode, valves are arranged at the communication positions of the treatment units and the corresponding water storage areas, and the treatment units conduct hydrolytic acidification treatment, micro-aerobic reaction treatment and biological treatment on sewage flowing out of the corresponding water storage areas in sequence; the co-production unit comprises a gas collection module and a fertilizer preparation module, the gas collection module is used for collecting biogas generated by the treatment unit, and the fertilizer preparation module is used for preparing redundant sludge of the treatment unit into biochar. The working pressure of the sewage treatment system is reduced when the water consumption is increased suddenly.

The invention discloses a preparation method of nitrided attapulgite / cellulose composite aerogel, the composite aerogel is prepared by mixing acidized attapulgite, a cellulose nanofiber solution and a nitrogen source and carrying out freeze drying and other processes, then the attapulgite / cellulose composite aerogel is placed in a tubular furnace and calcined under the protection of nitrogen, and the nitrided attapulgite / cellulose composite aerogel is obtained. The whole appearance of the nitrided attapulgite / cellulose composite aerogel has a net-shaped structure formed by three-dimensional nano microtubes. Wherein the cellulose microtubules form a framework, and the attapulgite is uniformly dispersed in the framework. In the preparation process, effective regulation and control on the microstructure of the composite aerogel can be realized by regulating and controlling parameters such as the concentration of a cellulose aqueous solution and the mass ratio of the attapulgite to the cellulose. When the composite aerogel is applied to wastewater treatment as a microbial carrier, the ammonia nitrogen degradation efficiency of microorganisms can be remarkably improved, and the composite aerogel has a good application prospect in the field of water treatment.

The invention discloses a method suitable for on-site analysis of the valence state of thallium in water. The method comprises the following operation steps: step 1, collecting and separating a water sample; step 2, acidizing treatment; 3, Tl (I) and Tl (III) are separated; 4, total thallium is measured; step 5, Tl (I) determination; the invention relates to the technical field of atomic spectrum metal element analysis, and the method has the beneficial effects that by combining an electrochemical separation technology with a Chelex-100 solid-phase extraction column and cooperating with a portable liquid cathode glow discharge thallium measurement instrument, high-sensitivity field detection of Tl (I) and Tl (III) is realized, the detection limit is lower than 1.0 g / L, and the repeatability is RSDlt; the analysis period of a single sample is less than or equal to 30 minutes, the weight of equipment is only 5kg, battery power supply is supported, and acidification-separation-detection integrated operation can be completed outdoors without professional laboratory conditions.

The invention provides a method for determining the tin content in fuming furnace waste residues through composite alkali fusion ICP-AES, and belongs to the technical field of chemical analysis and testing. The fuming furnace waste residues to be treated are taken, a composite alkali flux is added into the fuming furnace waste residues to be treated and mixed to be uniform, and the composite alkali flux is a mixture of sodium peroxide and sodium carbonate; the method comprises the following steps: heating a mixture containing fuming furnace waste residues and a composite alkali flux to 400-700 DEG C, and carrying out gradient melting; after fusion is completed, transferring a melt into water for leaching, acidizing a product obtained by leaching, filtering, and fixing the volume of filtrate to obtain a solution to be detected; and preparing a standard solution and a blank solution, determining in an inductively coupled plasma emission spectrometer, and obtaining the tin content in the fuming furnace waste residue according to the obtained working curve. The method is applied to determination of low tin content, and the tin content in the tin-containing waste slag of the fuming furnace can be rapidly and accurately determined.

The invention relates to a biomass low-temperature carbonization accelerant as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out water washing pretreatment on powder obtained by crushing a biomass raw material, and then carbonizing in an inert atmosphere to obtain biomass carbon powder; acidizing the biomass carbon powder to obtain carbon-based solid acid; the carbon-based solid acid and a transition metal salt auxiliary agent are mixed and ground, and the biomass low-temperature carbonization accelerant is prepared. The biomass low-temperature carbonization accelerant is a composite catalyst composed of carbon-based solid acid and transition metal salt; wherein the carbon-based solid acid is used as a main catalytic substrate, provides abundant Bronsted acid loci-SO3H, and is mainly used for catalyzing the dehydration reaction of biomass; transition metal ions are used as Lewis acid sites and generate a synergistic effect with the carbon-based solid acid to jointly catalyze depolymerization, dehydrogenation and aromatization reactions, so that deep carbonization can be initiated and completed at a relatively low temperature of 250-400 DEG C, and the carbonization rate is remarkably higher than that of an existing carbonization catalyst.

The invention relates to the technical field of attapulgite, and provides ultrasonic-thermal activated attapulgite applied to organic wastewater and a preparation method thereof, the preparation method comprises the following steps: pretreating attapulgite raw ore, mixing the pretreated attapulgite raw ore with water, carrying out ultrasonic activation, filtering, calcining, carrying out thermal activation, and optionally carrying out acidizing treatment; according to the method, through the synergistic effect of ultrasonic cavitation and heat treatment, fiber bundles of attapulgite are effectively stripped, impurities are removed, and a developed hierarchical pore structure and surface acid sites are formed; the obtained activated attapulgite has excellent adsorption performance on organic pollutants, and is especially suitable for treating complex wastewater containing aromatic organic matters and cationic dyes at the same time; when the adsorbent is applied, the adsorbent is added into wastewater, synchronous and efficient removal of pollutants can be realized after stirring adsorption is performed under proper conditions, and the saturated adsorbent can be regenerated and reused through high-temperature calcination. The method is simple in process, low in cost, high in adsorption efficiency and environment-friendly.

The present application relates to a kind of high alkalinity wastewater pre-acidification treatment method and its processing device system, the treatment method includes: the nutrient substance is added to the wastewater to be treated and is adjusted to obtain adjusted water;Part of the adjusted water is returned to adjust and handle, another part is added to the nutrient substance and is pre-acidification treatment, obtain pre-acidification water;Pre-acidification water is treated by anaerobic purification, obtain anaerobic purification water;Anaerobic purification water is treated by aeration and sedimentation in turn, obtain treated water.The treatment method and its processing device system provided by the present application can regulate the metabolic activity of microorganism, reduce the inhibitory effect of wastewater alkalinity and metal ions on anaerobic microorganism, improve the anaerobic removal rate of anaerobic purification treatment, reduce the adding cost of acidic substance and nutrient substance.

The present application relates to a kind of preparation methods of high loft polyester composite fiber, with nano calcium carbonate blend reinforced modified polymer as skin layer component, PET, PTT or PBT as core layer component, after spinning, winding using sheath-core spinning process, sequentially through preliminary drawing, acidification treatment, directional hot air treatment, cooling setting, re-drawing high loft polyester composite fiber is prepared;The melting point of skin layer component is lower than core layer component;Acid liquor is one or more above in dilute sulfuric acid, dilute hydrochloric acid and dilute nitric acid with pH 2.5-3.5;The present application utilizes the chemical property of nano calcium carbonate in acid liquor and forms porous structure, under the double influence of gas external force and porous structure, the degree of three-dimensional crimping inside sheath-core composite fiber is further increased, and then the crimping performance, loft performance, mechanical property and moisture absorption and quick drying performance of composite fiber are improved, and the overall process is simple and controllable.

The invention discloses a livestock and poultry manure treatment method based on industrial waste residue acidification, which comprises the following steps: mixing industrial acidic waste residues and livestock and poultry manure according to a mass ratio of 1: 3-2: 3, and adjusting the pH value to 4.5-5.5 to obtain acidified livestock and poultry manure; and adding straws or wood chips with C / N of more than or equal to 50 into the acidified livestock and poultry manure, mixing, and composting at 50-65 DEG C for more than or equal to 7 days to obtain a compost product. Through acidification treatment of industrial waste residues (such as distillers' grains and vinegar residues), emission of ammonia gas (NH3) in pig manure is reduced, the composting process is optimized, and the fertilizer utilization rate is increased. The method is widely applicable to large-scale farm manure treatment, organic fertilizer production and soil remediation engineering, and promotes the development of green agriculture and circular economy.

The invention provides an on-line volatile fatty acid monitoring system for water quality, which can effectively eliminate or reduce the influence of main interferents such as ammonia nitrogen to the greatest extent, realizes high-precision, high-selectivity and full-automatic on-line continuous monitoring, and has good economical efficiency and stability. The system comprises: a sampling and pretreatment unit, which is used for extracting a water sample and removing solid particles and suspended solids in the water sample through an on-line filtering device; the ammonia nitrogen separation unit is used for carrying out first distillation stripping operation on the pretreated water sample; the VFA separation unit is used for acidizing the water sample from which ammonia nitrogen is removed, and then carrying out secondary distillation stripping operation in an accurately controlled acidic environment; the VFA quantifying unit is used for absorbing VFA steam separated from the secondary distillation process by using quantitative set absorption liquid, measuring the conductivity change and real-time temperature of the absorption liquid before and after absorption through a sensor, and calculating the VFA concentration based on the change; and a control and data processing unit.