44results about "Sludge detoxification" patented technology

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.

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 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 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.

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.

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.

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 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.

The application discloses a method for regulating heavy metal distribution in a sludge hydrothermal treatment process, which comprises the following steps: step 1, mixing citric acid or tannic acid with sludge, adjusting the water content, and mixing in a polypropylene lining; step 2, placing the polypropylene lining in step 1 into a stainless steel hydrothermal reaction kettle for high-temperature treatment; and step 3, when the reaction kettle is cooled to room temperature, opening the reaction kettle to take out the reacted product, and separating the mixture of solid phase and aqueous phase. By regulating the type and concentration of the hydrothermal conditioner, the migration of heavy metals in the liquid and solid phases in the hydrothermal process is controlled, and a reference basis is provided for the disposal of heavy metals in sludge.

The application discloses a calcium-based composite material and a preparation method and application thereof, and comprises the following steps: cleaning and drying high-porosity straw biomass charcoal particles; mixing the biomass charcoal particles with calcium peroxide, and making the powder calcium peroxide enter the pores of the biomass charcoal by vibration to obtain biomass charcoal loaded with calcium peroxide; mixing the biomass charcoal particles loaded with calcium peroxide and calcium hydroxide-containing minerals in a certain proportion to obtain the calcium-based composite material; the calcium-based composite material is added into dried sludge, the adding amount is 5-15 wt.% of the mass of the dry base of the sludge, and then a lignin binder is added, and the sludge is pressed into a shape; in the pyrolysis process, the adding amount can reach a sulfur fixation rate of more than 60%, most of the nitrogen is converted into ammonia, and hydrogen cyanide is greatly reduced, so that the sludge pyrolysis is realized in a manner of synergistic sulfur fixation and nitrogen control, and the emission of pollution gas is reduced.

The present invention relates to methods for treating waters, sediments and / or sludges using alkaline earth metal peroxide, especially calcium peroxide, and cable bacteria, to a kit comprising a composition comprising at least one alkaline earth metal peroxide, and cable bacteria, and to uses of a composition comprising at least one alkaline earth metal peroxide, especially in combination with cable bacteria.

The application discloses a kind of based on microbial mineralization and nanocomposite silt synergic curing agent and preparation method thereof.Silt synergic curing agent includes 20%~30% fly ash, 15%~20% sulphoaluminate cement, 10%~15% modified phosphogypsum powder, 15%~20% biochar load nano iron, 5%~10% attapulgite, 6%~10% polyaspartic acid-co-acrylamide, 4%~5% sodium carboxymethyl cellulose, 3%~5% silica fume, 1%~3% magnesium carbonate and 1%~2% tartaric acid by mass percentage.Silt synergic curing agent is used for river dredging silt, harmless treatment of industrial sludge, by the adsorption performance of biochar, the reduction stable effect of nano iron and the cementation effect of composite cementing system synergize, realize the rapid dewatering of silt, high-strength solidification and long-term stabilization of pollutants.

The invention relates to a recyclable eutectic solvent microemulsion as well as a preparation method and application thereof. The microemulsion is composed of a polar deep-eutectic solvent, a non-polar deep-eutectic solvent and a surfactant, the molar ratio of the polar deep-eutectic solvent to the non-polar deep-eutectic solvent is 1: (3-5), and the surfactant accounts for 1%-10% of the total mass of the deep-eutectic solvent. The preparation method comprises the following steps: respectively heating and stirring a hydrogen bond donor and a hydrogen bond acceptor to prepare polar and non-polar deep-eutectic solvents, mixing the polar and non-polar deep-eutectic solvents with a surfactant according to a ratio, and carrying out ultrasonic treatment to form a stable microemulsion. When the microemulsion is used for oil sludge extraction, alkali is added to adjust the pH value of a system to 10-12 so as to realize high-efficiency separation of an oil phase, and then acid is added and heating dehydration is carried out, so that the microemulsion can be regenerated and recycled. The method has the characteristics of efficient extraction, heavy metal removal and recyclability of the extraction agent, is simple in process, green and economical, and is suitable for resourceful treatment of the oily sludge.

The application discloses a method for synergistically hydrothermally treating sludge based on tea dregs and organic acid, which comprises the following steps: mixing sludge, organic acid and tea dregs, hydrothermally treating the obtained mixed slurry, and dehydrating to obtain filtrate and mud cake. The method for synergistically hydrothermally treating sludge based on tea dregs and organic acid can significantly reduce the hydrothermal reaction temperature under the synergistic action of tea dregs and organic acid, and can effectively inhibit the generation of refractory organic matters such as melanoidins while effectively improving the dewatering performance of sludge under the synergistic hydrothermal treatment of organic acid and tea dregs, so as to facilitate the reduction and resource utilization of sludge. Therefore, by fully utilizing the characteristics of organic acid and tea dregs and synergistically hydrothermal treatment technology, efficient, environment-friendly, resourceful and low-cost treatment of sludge can be realized, and the method has the advantages of low reaction temperature, high treatment efficiency, low energy consumption, good dewatering effect, green environmental protection and the like, and has a wide application prospect and popularization value.

The application relates to the field of sludge treatment, and particularly discloses a method for vacuum preloading-curing combined treatment of sludge. The method comprises the following steps: filtering the sludge by using a screen to remove large-particle impurities, adding a flocculating agent and stirring, filtering the sludge by using a screen after standing, adding hydrogen peroxide into the sludge, continuously stirring for 2-4 hours, grinding the sludge in a grinder, mixing the sludge with concrete mortar, adding an ionic soil curing agent, uniformly stirring to obtain sludge-doped concrete, and curing the sludge-doped concrete by using a vacuum preloading method. The method solves the problem that various inorganic matters, organic matters and heavy metals in the sludge affect the performance of concrete.

In a method for converting contaminated sludge, particularly sludge from a sewage treatment plant, into biomass, the contaminated sludge to be processed is mixed with paper pulp and placed in pots 7, after which Miscanthus plants 9 are grown in the pots. During the growing season of the Miscanthus plants, the substrate 5 in the pots is watered. As the plant grows, harmful substances are broken down and absorbed by the plant. After one growing season, the Miscanthus plants are harvested, and the roots (11) containing remnants of the substrate (5) are removed from the stems of the Miscanthus plants (9). The roots (11) containing remnants of the substrate (5) are then processed into a new substrate. This new substrate is then placed in additional pots, and trees are grown in these pots. The harmful material remaining in the substrate is absorbed by the trees and converted into biomass.

This invention belongs to the field of sludge dewatering technology and provides a method for improving sludge dewatering performance while promoting sludge disinfection. The method includes the following steps: sequentially subjecting sludge to natural sedimentation and filtration to obtain pretreated sludge; the pretreated sludge and Fe... 2+ The compounds are mixed, and the pH of the mixture is adjusted to 4-6 using acid. The resulting acidic sludge is then reacted with dichlorohydantoin (DCDMH). This invention is the first to propose a method for simultaneously improving sludge dewatering performance and sludge disinfection, achieving both good dewatering and disinfection effects. CST reduction rate can reach over 30%, SRF reduction rate can reach over 60%, microbial inactivation rate can reach over 30%, and fecal coliform count can be <100 CFU / g DS. This invention utilizes DCDMH to dissolve and slowly release HClO and Fe. 2+ The dual effect of activated DCDMH in generating strong oxidizing free radicals to disinfect sludge can greatly improve the efficiency of disinfection and sterilization.

The application provides a river sediment heavy metal in-situ solidification remediation method, comprising the following steps: S1, detecting the content and physicochemical properties of the river sediment heavy metal; S2, designing a remediation material formula; S3, preparing and putting the remediation material; S4, mixing and stirring the sediment and the remediation material; S5, monitoring and evaluating the remediation effect; and S6, feeding back and adjusting the remediation effect. Through the fusion of multiple linear regression, curved surface fitting, self-organizing mapping and hybrid density network algorithm, the content and physicochemical property data of the sediment heavy metal are fully utilized, the remediation material formula can be accurately designed, compared with the traditional single algorithm or empirical formula design, the remediation material ratio can be more suitable for the actual pollution situation, and the utilization rate of the remediation material is improved.

To enable the separation and neutralization of ammonia mixed in the lubricating oil to a safe level, thereby allowing the sludge to be unloaded and incinerated on board the ship. [Solution] The ammonia-containing wastewater neutralization treatment system 100 is a device for neutralizing ammonia-containing wastewater WF containing ammonia AM. The ammonia-containing wastewater neutralization treatment system 100 comprises one or more neutralization sludge tanks 500, a sludge discharge line 160 for supplying ammonia-containing wastewater WF to the neutralization sludge tanks 500, a neutralizing agent supply line 180 for supplying a neutralizing agent N to the neutralization sludge tanks 500, a sludge circulation line 170 for circulating the ammonia-containing wastewater WF stored in the neutralization sludge tanks 500, and a sludge transfer pump 171 provided in the sludge circulation line 170 for moving the ammonia-containing wastewater WF.

[Problem] To provide a method for producing useful substances, which converts organic waste containing heavy metals into harmless substances such as fertilizers and soil conditioners by carbonizing organic matter while detoxifying heavy metals.[Solution] The present invention is a method for producing a useful material, said method comprising treating an organic waste in which heavy metals are mixed to produce a carbonized material containing weighed material. The organic waste in which the heavy metals are mixed is treated by dry carbonization of an organic waste to which a Ca component starting material and a SiO2 component starting material, which are topalmorite starting materials, are added in amounts sufficient to contain the mixed heavy metals in topalmorite crystals; a charcoal-forming step of dry carbonizing the waste, carbonizing the organic waste to form a carbide; the carbide formed in this carbide forming step and the topamolite raw material are charged into a reaction vessel while maintaining the high temperature state in the previous step, and slowly cooled in the presence of water with stirring to form the organic material; a heavy metal confinement step of forming a topamolite crystal mineral in which heavy metals mixed in the organic waste are confined, and forming a slurry in which the carbide and the topamolite crystal mineral are dispersed; and drying or dehydrating the slurry formed in the previous step to produce a useful substance containing a carbide containing the topamolite crystal mineral.

The application discloses a kind of high-efficiency sludge dewatering and antibiotic resistance gene reduction pretreatment methods, it is related to the harmless treatment technical field of pollutant, its steps include adding high ferrate and high periodate to the sludge, after stirring and mixing uniformly, obtain the sludge after pretreatment.The application high ferrate and high periodate pretreatment sludge exhibits significant technical advantages: without adjusting the treatment system to be acidic can generate and stable high-valence strong oxidizing iron ions, ensure that oxidation process is efficient and continuous;By the adjustment two-component regulation system of microorganism, group feeling and IV type secretion system, reduce the abundance of actinobacteria and chlorobi bacteria carrying ARGs, promote the transfer of antibiotic resistance gene from intracellular to extracellular, make it exposed in sludge external environment, promote the removal of sludge ARGs;Optimization and regulation of the surface morphology of sludge, particle dispersion and aggregation ensure its high dewatering performance, realize the efficient dewatering and resistance gene reduction in sludge pretreatment process.

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.

A treatment method for full resource recovery from sludge in municipal wastewater treatment plants is provided. Ozone is used to oxidize the cell contents of sludge, and the hermetia illucens pupa shell powder slurry, polydimethyl diallyl ammonium chloride and the like are used as conditioning materials and materials for improving the water retention performance of residues. The dehydrated products are prepared into soil water retention materials, the heavy metals separated from the sludge are recovered in a ferrite way, and the organic carbon in the liquid phase is utilized as a carbon source of a wastewater treatment plant.

The invention relates to an ammonia-containing waste liquid neutralization treatment system and an ammonia-containing waste liquid neutralization treatment method. Ammonia mixed in the lubricating oil can be neutralized to a safe level after separation, so that sludge can be unloaded and incinerated on a ship. A neutralization treatment system (100) for an ammonia-containing waste liquid is a device for neutralizing an ammonia-containing waste liquid (WF) containing ammonia (AM). A neutralization treatment system (100) for an ammonia-containing waste liquid is provided with: one or more neutralization sludge tanks (500); a sludge discharge line (160) for supplying ammonia-containing waste liquid (WF) to the neutralization sludge tank (500); a neutralizing agent supply line (180) that supplies a neutralizing agent (N) to the neutralizing sludge tank (500); a sludge circulation line (170) for circulating the ammonia-containing waste liquid (WF) stored in the neutralization sludge tank (500); and a sludge transfer pump (171) that is provided in the sludge circulation line (170) and moves the ammonia-containing waste liquid (WF).