107results about "Sludge detoxification" patented technology

The invention discloses a sludge treatment method and system, and relates to the field of solid waste treatment, and the method specifically comprises the following operation steps: S1, multi-frequency resonance pretreatment: destroying a sludge colloid structure through stepped mechanical vibration: collapsing an extracellular polymer network at a low frequency, breaking down microbial cell walls at an intermediate frequency to release intracellular water, pathogenic bacteria are inactivated through a high-frequency cavitation effect; s2, performing electrochemical in-situ flocculation; s3, gradient pressure dehydration; s4, low-temperature mineralization stabilization; and S5, vacuum condensation and recovery. According to the sludge treatment method and system, through stepped low-frequency, medium-frequency and high-frequency mechanical resonance, the colloid structure of the sludge can be directionally damaged, the fluidity of the sludge is remarkably improved, chemical conditioners are remarkably reduced, agent residues and secondary pollution are avoided, pathogens are physically inactivated through the high-frequency cavitation effect, and the treatment effect of the sludge is improved. Micro-nano oxygen bubbles are synchronously generated to strengthen free radical oxidation, and a sterile environment is created for subsequent mineralization.

The invention provides an in-situ curing and repairing method for heavy metals in river sediment. The in-situ curing and repairing method comprises the following steps: S1, detecting the content and physicochemical properties of the heavy metals in the river sediment; s2, designing a repair material formula; s3, preparing and putting a repairing material; s4, mixing and stirring the bottom mud and the repairing material; s5, monitoring and evaluating the repairing effect; and S6, repairing effect feedback and adjustment. According to the method, multiple linear regression, curved surface fitting, self-organizing mapping and mixed density network algorithms are fused, the sediment heavy metal content and physicochemical property data are fully utilized, a repair material formula can be accurately designed, and compared with a traditional single algorithm or empirical formula design, the repair material proportion can better fit the actual pollution condition, and the repair efficiency is improved. The utilization rate of repair materials is improved.

The invention provides a biochar repairing agent for marine sediments and a preparation method of the biochar repairing agent, and belongs to the technical field of repairing agents. The preparation method comprises the following steps: carbonizing straws, modifying by phosphoric acid and concentrated nitric acid, depositing ferroferric oxide-titanium dioxide, loading UiO-66-(COOH) 2 on the surface, coupling cyclodextrin-MOF and chitosan, crosslinking, performing magnet separation, washing and drying to obtain the biochar repairing agent for the marine sediments. The biochar repairing agent for the marine sediments prepared by the invention has a relatively large specific surface area and a plurality of coordination groups, can better fix heavy metal ions in the marine sediments, also has a photocatalytic degradation effect on organic pollutants, and is good in mechanical strength, easy to store and transport, safe, environment-friendly and easy to separate; wide application prospects are realized.

The invention discloses a liquid treatment agent for red mud harmless treatment and a preparation method thereof.The liquid treatment agent comprises a treatment agent A and a treatment agent B. The treatment agent A is formed by mixing hydrochloric acid and sulfuric acid, and the treatment agent B is prepared from malic acid, acetic acid, phthalic acid monoester, a solvent and an adsorbent, the mass fraction of the malic acid is 20%-40%, the mass fraction of the acetic acid is 20%-40%, the mass fraction of the phthalic acid monoester is 15%-25%, the mass fraction of the solvent is 5%-15%, and the mass fraction of the adsorbent is 5%-15%. The red mud is subjected to primary treatment by using the liquid treatment agent A, and then the red mud subjected to primary treatment is treated again by using the liquid treatment agent B, so that the alkalinity of the red mud can be effectively reduced, and various heavy metals, fluorides, radioactive elements and trace toxic elements in the red mud can be effectively removed; the environment pollution caused by the loss of the harmful substances is avoided, so that the innocent treatment of the red mud is realized.

The invention discloses a dredged sludge recycling and abandoned mine high and steep slope ecological restoration method, and belongs to the technical field of ecological restoration in environmental engineering. Dredged sludge is subjected to pretreatment and solid-liquid separation, and large-particle impurities and part of water are removed; the pretreated sludge is subjected to organic matter removal treatment, and organic matter in the sludge is efficiently removed; carrying out heavy metal stabilizing treatment on the sludge without the organic matters, and fixing heavy metal ions in the sludge; the dredged sludge subjected to heavy metal stabilization treatment is mixed with a soil conditioner, the structure and bioavailability of the matrix are improved, and the matrix material suitable for mine ecological restoration is prepared; the prepared matrix material is applied to high and steep slopes of abandoned mines for vegetation restoration and ecological restoration. The technology is high in treatment efficiency, low in cost and environmentally friendly, the stability and the ecological restoration effect of the mine slope are remarkably improved, and the method has important engineering application value and popularization prospects.

The invention discloses a sludge synergistic curing agent based on microbial mineralization and nano-compounding and a preparation method thereof. The sludge synergistic curing agent is prepared from the following components in percentage by mass: 20%-30% of fly ash, 15%-20% of sulphoaluminate cement, 10%-15% of modified phosphogypsum powder, 15%-20% of charcoal loaded nano iron, 5%-10% of attapulgite, 6%-10% of polyaspartic acid-co-acrylamide, 4%-5% of sodium carboxymethyl cellulose, 3%-5% of silica fume, 1%-3% of magnesium carbonate and 1%-2% of tartaric acid. The sludge synergistic curing agent is used for innocent treatment of river dredging sludge and industrial sludge, and rapid dehydration and high-strength curing of sludge and long-acting stabilization of pollutants are realized through synergism of the adsorption performance of the biochar, the reduction stabilization effect of the nano-iron and the cementation effect of a composite gel system.

The invention belongs to the technical field of sludge dewatering, and provides a method for promoting sludge disinfection while improving sludge dewatering performance. The method comprises the following steps: sequentially carrying out natural sedimentation and filtration on sludge to obtain pretreated sludge; and mixing the pretreated sludge with a Fe < 2 + > compound, adjusting the pH value of the mixed solution to 4-6 by using an acid, and reacting the obtained acidic sludge with dichloro hydantoin (DCDMH). The invention firstly provides a method for improving the sludge dewatering performance and synchronously disinfecting and sterilizing the sludge, the method has a better dewatering effect and a better disinfecting effect, the CST reduction rate can reach more than 30%, and the SRF reduction rate can reach more than 60%; the microbe inactivation rate can reach 30% or above, and the total flora number of fecal large intestines is 1t; 100 pieces / g DS. According to the invention, the sludge is killed by using the dual effects of dissolving and slowly releasing HClO by DCDMH and activating DCDMH by Fe < 2 + > to generate strong oxidation free radicals, so that the disinfection and sterilization efficiency can be greatly improved.

A method for production of pure phosphates comprises providing (S10) of a strip solution being an aqueous solution of one of monoammonium phosphate and monopotassium phosphate, loaded with stripped phosphate from a feed liquid comprising phosphoric acid contaminated by heavy metals and iron A base is added (S20) into the separated strip solution raising the pH to 2 – 5.5, forming of a heated solution and causing compounds comprising iron and phosphate to precipitate. A precipitant, precipitating heavy metals, is added (S30). Precipitated compounds comprising iron and phosphate and precipitated heavy metal compounds are separated (S40). The heated filtered solution is thereafter cooled off (S50) into a cooled solution, causing precipitation of phosphate compounds. The precipitated phosphate compounds are removed (S60) from the cooled solution. The cooled solution is recirculated (S70) for use as input strip solution in the stripping operation. A system for production of pure phosphates is also disclosed.

A neutralization processing system for an ammonia-containing waste fluid, includes: one or more sludge tanks; a sludge discharge line configured to supply the waste fluid to the sludge tank; a neutralizer supply line configured to supply a neutralizer to the sludge tank; and a sensor configured to measure pH of the waste fluid or an ammonia concentration of the waste fluid.

The application discloses an environment-friendly and efficient solidification and stabilization agent for calcium fluoride sludge and a preparation method thereof, and comprises the following raw materials in parts by weight: a chemical stabilization agent 20-30 parts, an inorganic solidification agent 60-70 parts, a microwave dehydration aid 1-5 parts and a pH regulator 2-5 parts. The application has the advantages of good treatment effect, solves the problems that the existing calcium fluoride sludge treatment agent has poor treatment effect on calcium fluoride sludge in the preparation process, harmful substances and pollutants in the calcium fluoride sludge are easy to penetrate into underground water or soil, environmental pollution is caused, and the treated sludge cannot reach the environmental protection standard and is disposed or utilized, which leads to the problems of re-releasing harmful substances in the use process and forming secondary pollution.

The animal epidemic disease excrement harmless treatment device comprises a fermentation tank and further comprises a fermentation assembly, an excrement inlet is formed in the top of the fermentation tank, a driving rod fixedly penetrates through the bottom of the fermentation tank, a driving plate is fixedly mounted on the circumferential surface of the driving rod, and a moving hole is formed in the top of the fermentation tank; the fermentation assembly comprises a hollow frame, a shielding plate, a control plate, a control groove, a sealing plate, a sliding groove, a sliding frame, an elastic telescopic plate and an arc-shaped plate, the hollow frame is slidably mounted on the inner wall of the moving hole, the shielding plate is slidably mounted on the inner wall of the hollow frame, and the shielding plate moves leftwards to increase the shielding area of the shielding plate on the excrement inlet; the feeding amount is adjusted according to the excrement type, it can be ensured that the standing time of the excrement in the fermentation tank is matched with the temperature, the harmless treatment effect is further optimized, and the animal excrement feeding amount control device has the advantage that the excrement feeding amount can be controlled according to different animal excrement.

The application discloses a kind of eluent and its preparation method and application, preparation method includes: adding potassium methoxide methanol solution to the trimethylolpropane in molten state, after stirring, vacuumizing, then droping glycidol monomer, after reaction, add methanol, dry, obtain hyperbranched polyglycerol ether;Add carbonyl imidazole to the N,N-dimethylformamide solution of saturated fatty acid, after stirring and mixing, drop to the N,N-dimethylformamide solution of hyperbranched polyglycerol ether, reaction is heated in nitrogen atmosphere, after reaction, the product is treated, obtain temperature-sensitive hyperbranched polyglycidol ether eluent.The eluent prepared in the application can greatly reduce the treatment cost of elution waste liquid while efficiently removing heavy metals.

The invention discloses thermocatalytic degradation equipment and method for reduction treatment of biochemical sludge. The equipment comprises an equipment base, a degradation barrel, a dehydration assembly and a pyrolysis assembly, the degradation cylinder is arranged on the equipment base, and a filter plate is arranged at the lower end of the degradation cylinder; the dehydration assembly comprises an extrusion disc clamped in the degradation barrel, a pushing frame clamped on the equipment base and connected with the extrusion disc, and a driving motor for providing power for the pushing frame; the pyrolysis assembly comprises a sliding heat insulation seat clamped in the extrusion disc, an electric heating rod arranged on the sliding heat insulation seat and a hydraulic oil cylinder for providing power for the heat insulation seat; the equipment disclosed by the invention is reasonable in structural design, the biochemical sludge is subjected to mechanical dehydration treatment before thermocatalytic degradation treatment, so that the volume of the biochemical sludge is effectively reduced, and the reduction treatment of the biochemical sludge is promoted; meanwhile, when the dewatered biochemical sludge is heated, the energy consumption of the equipment is lower, and the equipment is suitable for popularization and application.

The invention discloses a paving and turning type sludge drying treatment device, and relates to the field of sludge treatment equipment, the paving and turning type sludge drying treatment device comprises a rack, and also comprises translation mechanisms symmetrically arranged on two sides of the rack and used for driving the rack to move along a paving path; the paving mechanism comprises a coulter, a turning and throwing motor and a turning and throwing spiral blade, the output end of the turning and throwing motor is fixedly connected with the turning and throwing spiral blade, and the turning and throwing spiral blade rotates and is matched with the rack to move along a paving path so as to flatly spread, turn and rake sludge paved on the outdoor ground / sunlight room ground; the degerming mechanism is arranged on the rack and is used for performing degerming operation on the sludge; the material collecting mechanism comprises a material collecting spiral blade, and the material collecting spiral blade is used for collecting the dewatered sludge to one side of the rack. Through mutual cooperation of the translation mechanism, the paving mechanism, the degerming mechanism and the material receiving mechanism, the problems that in the sludge drying treatment process, energy consumption is high, and the environment is affected are solved.

A granular activated carbon (GAC) reactivation waste product enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill includes at least one bioreactor including biomass to receive the feed water and to promote growth of biological flocs, and an impregnation subsystem to receive a flow of biomass and a predetermined amount of GAC reactivation waste product and to blend the biomass with the GAC reactivation waste product to form GAC reactivation waste product-impregnated biological flocs. The impregnation subsystem outputs a flow of GAC reactivation waste product-impregnated biological flocs to the bioreactor such that the GAC reactivation waste product-impregnated biological flocs in the bioreactor adsorb to and remove the PFAS from the treated water, and the bioreactor outputs a flow of GAC reactivation waste product-impregnated biological flocs and treated water. The system also includes at least one secondary clarifier coupled to the bioreactor which separates the GAC reactivation waste product-impregnated biological flocs from the wastewater and / or landfill leachate and produces a flow the treated water.

The invention discloses a continuous treatment device for metal ore flotation wastewater, which comprises a sedimentation tank and a fine washing tank connected through a circulation pipeline, and the bottom of the sedimentation tank is provided with a telescopic moving baffle plate to form tidal sealing so as to simultaneously neutralize and precipitate the wastewater. Heavy metal ions in the flotation wastewater are removed step by step through two chemical precipitation methods, and when a large amount of settled sludge is generated in a neutralization precipitation method, the telescopic and movable partition plate is adopted for tidal movement, so that two layers of settling spaces are formed in the settling pond from bottom to top, and the settling effect is improved. The sludge can be further attenuated in the sedimentation space at the bottom layer, so that the environmental problem caused by direct discharge of the settled sludge is avoided, the treatment efficiency of the sedimentation tank can be improved through the double-layer sedimentation space, and the settled sludge and wastewater can be fed into the sedimentation space at the bottom layer to be settled by opening the baffle after the neutralization is completed; and the three-dimensional space is fully utilized, and meanwhile, continuous precipitation can be ensured.

The present application relates to a kind of phosphorus bacteria reinforced sludge hydrothermal carbonization soil heavy metal remediation matrix and preparation method and application, wherein soil heavy metal remediation matrix is treated by hydrothermal carbonization to phosphorus-rich municipal sludge, and calcium chloride is added to obtain sludge hydrothermal carbonization product, acid-tolerant and heavy metal-tolerant phosphorus bacteria are enriched and screened from pyrite mountain soil, and it is loaded on the surface of rice husk modified by NaOH to obtain phosphorus bacteria-rice husk composite material, sludge hydrothermal carbonization product and phosphorus bacteria-rice husk composite material are mixed according to certain proportion, and soil heavy metal remediation matrix is obtained after open stacking for a certain time.Compared with prior art, the matrix can release a large amount of phosphate into the soil, which can form stable minerals with soil heavy metals to immobilize heavy metals, and on the other hand, it can provide sufficient phosphorus source for overlying remediation plants, promote plant growth, and ultimately realize ecological greening of soil.

The invention provides a pretreatment method for inhibiting hydrogen sulfide escape in a sludge dewatering process. The pretreatment method comprises the following steps: S1, carrying out chemical pretreatment on sludge through an iron-based desulfurizer before dewatering. Before mechanical dehydration of sludge, specific iron salt is added for pretreatment, so that escape of hydrogen sulfide is inhibited from the source. And the specific problem of instantaneity and high-concentration H2S escape caused by physical extrusion in a mechanical dehydration link is solved in a targeted manner. And source control and process blocking are realized.

A method for producing pure phosphate comprises providing (S10) a reextraction solution carrying a reextracted phosphate from a feed liquid comprising phosphoric acid contaminated with a heavy metal and iron, the reextraction solution being an aqueous solution of one of monoammonium phosphate and monopotassium phosphate. A base is added (S20) to the separated reextraction solution, raising the pH to 2-5.5, forming a heated solution and causing precipitation of a compound comprising iron and phosphate. And adding (S30) a precipitating agent for precipitating heavy metals. Separating (S40) the precipitated compound comprising iron and phosphate and the precipitated heavy metal compound. Thereafter, the heated filtered solution is cooled (S50) into a cooled solution, causing precipitation of the phosphate compound. The precipitated phosphate compound is removed from the cooled solution (S60). The cooled solution is recycled (S70) for use as an input back extraction solution in the back extraction operation. A system for producing pure phosphates is also disclosed.

The invention discloses a preparation method and application of a monatomic copper feed additive, and the preparation method comprises the following steps: step 1, preparing a mixed solution A, putting melamine and copper nitrate into a sufficient dimethyl sulfoxide solution, and uniformly stirring to obtain a light green solution; step 2, preparing a mixed solution B, putting cyanuric acid into a sufficient dimethyl sulfoxide solution, and uniformly stirring to obtain a clear transparent solution; 3, mixing the mixed solution A and the mixed solution B, and reacting to obtain a precipitate; 4, filtering, washing and drying the precipitate to obtain a precursor; 5, under the inert atmosphere, the precursor is subjected to heat treatment, and the monatomic copper catalyst is obtained; the prepared monatomic copper feed additive is used in broiler feed. The monatomic copper feed additive is prepared, belongs to nano-enzyme, and has remarkable effects of resisting escherichia coli and reducing ammonia in chicken manure when being used for broiler chicken feeding.

The present invention discloses a low-carbon biological treatment system for manure and sewage, which is in the field of manure and sewage treatment technology. The system comprises a manure collecting tank, a grille tank, a separation device, a solid-liquid separation tank, a regulating tank, an anaerobic treatment tank, an aerobic and facultative aerobic treatment tank, an oxidation pond, a decolorization and sterilization tank, and a water storage tank. The manure collecting tank, the grille tank, the separation device, the solid-liquid separation tank, the regulating tank, the anaerobic treatment tank, the aerobic and facultative aerobic treatment tank, the oxidation pond, the decolorization and sterilization tank, and the water storage tank are sequentially connected by pipelines. By separating the garbage in the manure and sewage before biological treatment, the manure and sewage can be in a more suitable state for subsequent fermentation treatment.

A neutralization processing system for an ammonia-containing waste fluid, which neutralizes the ammonia-containing waste fluid containing ammonia, the neutralization processing system includes: one or more neutralization sludge tanks; a sludge discharge line configured to supply the ammonia-containing waste fluid to the neutralization sludge tank; a neutralizer supply line configured to supply a neutralizer to the neutralization sludge tank; a sludge circulation line configured to discharge the ammonia-containing waste fluid stored in the neutralization sludge tank from the neutralization sludge tank and return the ammonia-containing waste fluid to the neutralization sludge tank; and a sludge transfer pump provided in the sludge circulation line and configured to move the ammonia-containing waste fluid.

The present invention provides a method for treating seawater aquaculture sediment as a feed source, a sea cucumber feed and a preparation method thereof, and belongs to the field of recycling waste resources in the aquaculture industry. The present invention dries and crushes the seawater aquaculture sediment, mixes it with stone powder, and places it in a microbial leaching device for elution to obtain deodorized seawater aquaculture sediment; the deodorized seawater aquaculture sediment, Bacillus subtilis, a nitrifying bacteria mixture and a special nutrient solution are mixed and fermented, and dried to obtain the feed source seawater aquaculture sediment. The present invention kills harmful bacteria in the sludge through a simple and efficient physical treatment method; designs a spray device to use water washing to reduce harmful heavy metals and salinity in the sludge; activates carbon, nitrogen and phosphorus in the sediment through enzymatic hydrolysis and fermentation; and realizes the feed source application of contaminated sediment by establishing a special sea cucumber feed with a sediment formula, thereby increasing the utilization value of the contaminated sediment, alleviating the pressure of the sea cucumber feed on sea mud, and promoting the sustainable development of the sea cucumber aquaculture industry.

A granular activated carbon (GAC) reactivation waste product enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill includes at least one bioreactor including biomass to receive the flow wastewater and / or landfill leachate and to promote growth of biological flocs and an impregnation subsystem to receive a flow of biomass and a predetermined amount of GAC reactivation waste product and to blend the biomass with the GAC reactivation waste product to form GAC reactivation waste product-impregnated biological flocs. The at least one impregnation subsystem outputs a flow of GAC reactivation waste product-impregnated biological flocs to the bioreactor such that the GAC reactivation waste product-impregnated biological flocs in the bioreactor adsorb to and remove a majority of the PFAS from the flow of wastewater and / or landfill leachate and the bioreactor outputs a flow of GAC reactivation waste product-impregnated biological flocs having a majority of the PFAS adsorbed thereto and wastewater and / or landfill leachate having a majority of the PFAS removed. The system also includes at least one secondary clarifier coupled to the bioreactor which separates the GAC reactivation waste product-impregnated biological flocs having a majority of the PFAS adsorbed thereto from the wastewater and / or landfill leachate having a majority of the PFAS removed and produces a flow the treated wastewater and / or landfill leachate having a majority of the PFAS removed.

The invention discloses an efficient adsorption underwater ecological desilting material and a preparation method thereof, and belongs to the technical field of adsorbents, activated charcoal is used as a carrier, calcium sulfide is coated on the surface, MOF-zinc is used as a middle buffer layer, calcium chloride dihydrate is used as a calcium source on the outermost layer to regenerate an amorphous porous calcium carbonate coating layer, and the adsorbent is prepared. The MOF-zinc intermediate buffer layer and the amorphous porous calcium carbonate layer on the outermost layer have the porous property, so that active sites on the surface of the carrier activated biochar can be ensured to the greatest extent, and the active site blockage caused by the coating effect is avoided; a good removal effect on cadmium ions, lead ions and chromium ions is achieved; according to the amorphous porous calcium carbonate coating layer, polyacrylic acid serves as a stabilizer and can be complexed with calcium ions of amorphous porous calcium carbonate, so that the amorphous porous calcium carbonate is stabilized, and rapid nucleation and crystallization in a water environment are avoided.

The application provides a bacteriostatic and deodorizing composite preparation for pets and application thereof, which comprises 30-40% of enzyme preparation, 20-30% of plant extract, 20-30% of probiotic powder, and 0-10% of inorganic salt and filling aid. The application can efficiently remove ammonia and effectively reduce the ammonia gas yield in excrement; can efficiently inhibit E. coli, Salmonella, MRSA, C. perfringens and the like; can reduce fecal odor and effectively reduce fecal odor substances in pet excrement, such as indole, cadaverine, spermidine, putrescine and skatole and the like; is safe and harmless, avoids the negative influence of chemical synthetic substances on pet health, prevents clumping, and maximally reduces the influence on cat litter clumping, thereby guaranteeing the use effect.

A process of making a fuel product as an additive from a non-auto-combustible high protein organic material for the destruction of hazardous compounds including polyfluoro compounds in a thermal process system is provided. Thermal reactions within thermal reaction equipment are controlled by controlling the moisture and oxygen in the reaction atmosphere of the equipment and energy inputs at or downstream of a thermal reaction chamber. The concentration of protein thermal decomposition by-products, temperature, and residence time and / or additions of energy within the thermal reaction equipment environment are controlled to destroy hazardous compounds.

The invention relates to a magnetic embedding body for black and odorous water body remediation, a preparation method and an unmanned remediation ship. Magnetic particles are added into a sodium alginate solution for ultrasonic dispersion, and a first solution is obtained; adding functional bacteria into the first solution, and performing ultrasonic dispersion to obtain a second solution; adding the second solution into a CaCl2 solution to obtain sodium alginate / functional bacterium magnetic gel beads; placing the sodium alginate / functional bacterium magnetic gel beads in a cross-linking agent for coating to obtain cross-linking agent / sodium alginate / functional bacterium magnetic gel beads; putting the cross-linking agent / sodium alginate / functional bacterium magnetic gel beads into a sodium alginate solution, and coating again; and coating again, and curing by a fixing agent to obtain the magnetic embedding body for repairing the black and odorous water body. The problems that in the related technology, a repairing agent is difficult to recycle after water body repairing, secondary pollution is possibly caused, and heavy metal in bottom mud is difficult to effectively remove can be solved.