135 results about "Sludge cake" patented technology

The invention relates to the technical field of sludge treatment, and discloses a sludge treatment method based on sludge reduction and ammonia nitrogen recovery, which comprises the following steps: 1) alkali thermal hydrolysis: adding alkali into sludge to adjust the pH value to 9-11, and carrying out thermal hydrolysis reaction; (2) wet oxidation: heating after reaction and discharging, and carrying out wet oxidation reaction; (3) flash evaporation: carrying out heat recovery after reaction discharging, and carrying out flash evaporation to obtain a sludge mixed solution and flash evaporation steam; (4) dewatering: performing heat recovery on the sludge mixed solution, and then dewatering to obtain a sludge cake and filtrate; and (5) ammonia nitrogen air stripping: carrying out ammonia nitrogen air stripping on the filtrate by adopting steam, wherein the filtrate after air stripping can be reused as a carbon source for sewage treatment. According to the method, the oxidative degradation efficiency of the sludge is improved through coupling of alkali thermal hydrolysis and wet oxidation treatment, ammonia nitrogen recovery and sludge reduction are facilitated, and the filtrate has the characteristics of high COD and low total nitrogen and is more suitable for being used as a carbon source.

The invention discloses a preparation method and a use method of tannic acid complex iron for strengthening the dehydration performance of ozonized sludge. The preparation method comprises the following steps: mixing and stirring soluble ferric salt and a tannic acid aqueous solution to form a tannic acid complex iron mixed solution, and adjusting the pH value to generate a tannic acid complex iron precipitate; the use method comprises the following steps: introducing ozone into organic sludge for pretreatment; adding tannic acid complex iron into the sludge subjected to ozone pretreatment, and fully mixing; ozone is introduced into a mixed solution of the tannic acid complex iron and the sludge for treatment. When the prepared tannic acid complex iron is added into a sludge system subjected to ozone oxidation treatment, the degradation effect of the system on sludge protein can be improved by 25%-35%, the dehydration effect of the sludge can reach the deep dehydration level, and the water content of a filter-pressed sludge cake is reduced to 40%-55%.

Disclosed in the present invention are an AnDMBR dynamic membrane assembly based on electrode polarity conversion, and a control method. Specifically, in the present invention, flat-sheet membranes and conductive titanium meshes are combined and are then connected to a power source; and by means of an electrode polarity conversion method, the formation of a dynamic membrane layer is accelerated at a starting stage by using the characteristic of charges of opposite polarities attracting each other, and when the dynamic membrane layer is excessively thick, a sludge cake layer is peeled off by using the characteristic of charges of the same polarity repelling each other, so as to alleviate membrane fouling, thereby achieving effective control over membrane fouling, and ensuring the long-term and stable operation of a reactor.

The invention relates to the technical field of sludge separation, and discloses a sewage and sludge separation device which comprises a main body, the top of the main body is in bolted connection with a top cover, the outer surface of the main body is fixedly connected with a water outlet pipe, a discharge port is formed in the outer wall of the main body, a discharge door is hinged to the interior of the discharge port, and a spring rod is rotationally connected to the side, close to the main body, of the discharge door. The ends, away from the discharging door, of the spring rods are rotationally connected with blocking doors. At the moment, sludge becomes a sludge cake after being extruded, residual water in the sludge can be discharged outwards through filtering holes in an inner sleeve, when sludge and water are separated through centrifugal force generated by extrusion of a lower top plate and rotation of a conical barrel, a double filtering system is formed, and the speed of water passing through a filtering net and a filtering plate is increased; and compared with a traditional gravity precipitation separation mode, the separation time is greatly shortened, so that the separation efficiency of sewage and sludge is integrally improved.

The invention discloses a pickling line wastewater treatment device and treatment method, and relates to the technical field of pickling line wastewater treatment. The pickling line wastewater treatment device comprises a water injection tank, a medicament storage tank system, an adjusting tank, a neutralization reaction tank, a coagulative precipitation tank, a sludge concentration tank, sludge dewatering equipment, a water collecting tank, a water purifying tank and a sludge storage bin which are communicated in sequence, the filter frame is located in the shell, and sludge enters the filter frame through the conveying pipeline; the rotating assembly is used for driving the filtering frame to rotate, so that the sludge is dehydrated under the action of centrifugal force; the extrusion filter plate is arranged on the inner side of the filter frame and is used for extruding the sludge. The extrusion filter plate capable of reciprocating is arranged in the rotatable filter frame, so that the dehydration efficiency and the solid content of a mud cake can be remarkably improved by utilizing the synergistic effect of dynamic centrifugal force and intermittent mechanical pressure.

The invention discloses activated sludge sewage treatment equipment and a sewage treatment process, the activated sludge sewage treatment equipment comprises a mounting frame, an aeration tank is arranged at the top of the mounting frame, a sedimentation tank is arranged on one side of the aeration tank, a support frame is arranged in the sedimentation tank, a stirring barrel is mounted on the support frame, and a transition channel is connected between the aeration tank and the stirring barrel; the transition channel is used for guiding the aerated mixed liquid to flow into the sedimentation tank, and a reflux pump for refluxing sludge in the sedimentation tank into the aeration tank is arranged on one side of the aeration tank; one side of the sedimentation tank is connected with a filter press through a water conveying pipe; the reflux pump controls reflux of activated sludge at the bottom of the sedimentation tank, the activity of microbial communities in the aeration tank is maintained, the addition amount of fresh sludge is reduced, and the operation cost is reduced; the filter press realizes solid-liquid separation through high-pressure extrusion, the water content of the sludge is reduced to 60% or below, the sludge cake can be directly used for incineration, composting or building raw materials, and resource utilization is realized.

The invention discloses a deep dehydration method of sludge pyrohydrolysate, which comprises the following steps: firstly, taking the sludge pyrohydrolysate, measuring the water content of the sludge pyrohydrolysate, then adding an iron salt conditioner according to 1-4% of the dry weight of sludge, stirring and then heating; and then conveying the heated sludge into filter pressing dehydration equipment for deep dehydration to form a sludge cake. In order to solve the problem of dehydration of the pyrohydrolysate obtained by carrying out pyrohydrolysis conditioning on the residual sludge of the sewage plant, an iron salt conditioner is added into the pyrohydrolysate for conditioning again, the temperature is kept at 60 DEG C or above for reaction, and then the mixture is conveyed to filter-pressing dehydration equipment for deep dehydration, so that the dehydration performance of the sludge can be remarkably improved, and the dehydration efficiency is improved. Compared with a common sludge thermal hydrolysate direct dehydration method, the sludge deep dehydration efficiency and effect can be obviously improved, stable operation can be achieved, and the comprehensive treatment cost of sludge is reduced.

The invention discloses a printing and dyeing wastewater sludge treatment device, and belongs to the technical field of sludge treatment.The printing and dyeing wastewater sludge treatment device comprises a treatment tank, a stirring assembly is fixedly connected to the top end of the treatment tank, a sludge treatment assembly is fixedly connected to one side of the treatment tank, and a liquid collection pool is installed at the bottom end of the middle of the sludge treatment assembly; a sludge collecting tank is arranged at the bottom of one side, far away from the treatment tank, of the sludge treatment assembly. By means of the filter cylinder, the extrusion cylinder, the limiting conveying cylinder, the drying cylinder and the internal dividing and clustering structure, efficient treatment and low-water-content output of sludge are achieved, the filter cylinder preliminarily filters the sludge to remove most of water, the limiting conveying cylinder further compresses the sludge, and the water content of the sludge is reduced. The sludge can smoothly enter the drying cylinder, residual water in the sludge is evaporated, the water content of the sludge cake is reduced, the sludge enters the extrusion cylinder, and the sludge cake with extremely low water content is finally formed through high-strength extrusion, so that subsequent transportation and disposal are facilitated.

The invention discloses a sludge dewatering flocculant and a preparation method and application thereof.The sludge dewatering flocculant is a natural polymer modified corn straw powder flocculant, natural corn straw is smashed into powder to serve as a base material, and cationic groups are carried by the base material through alkalization and graft copolymerization; and the cation group is quaternary ammonium group methyl. The modified corn straw powder flocculant is used for conditioning municipal sludge, is beneficial to flocculation and dehydration of the sludge, is extremely good in solubility, can be easily and fully dispersed in the sludge, is extremely small in addition amount, and has the characteristics of environment friendliness and high efficiency; the biomass fuel is prepared by modifying the corn straws, so that the biomass fuel also has the advantages of high calorific value similar to that of the corn straws and the like, and subsequent sludge incineration disposal is facilitated. Municipal sludge is conditioned through the modified corn straw powder flocculating agent and dehydrated, the water content of an obtained sludge cake can be as low as 65%, and the specific resistance SRF of the sludge can be as low as 6.25 * 10 <-12 > m.kg <-1 >.

The utility model discloses a sludge filter-pressing dehydration device, and relates to the technical field of sludge dehydration equipment. The sludge compressing and dewatering device comprises a homogenizing tank, a squeezing water tank, a blowback gas storage tank, a vacuum pump, a hot air unit and a double-diaphragm filter press, the homogenizing tank is connected with the double-diaphragm filter press through a filter press feeding pump, the squeezing water tank is connected with the double-diaphragm filter press through a squeezing pipeline, the double-diaphragm filter press is connected with a back flushing pipeline, a three-way pneumatic valve is arranged on the back flushing pipeline, a compressed air pipeline is arranged between a back flushing air storage tank and the three-way pneumatic valve, and the back flushing air storage tank is connected with the double-diaphragm filter press. The vacuum pump is connected with the double-diaphragm filter press through a vacuum pipeline, and the hot air unit is connected with the double-diaphragm filter press through a hot air outlet pipeline. According to the sludge filter-pressing dehydration device provided by the utility model, the hot air unit and the vacuum pump are arranged, and the moisture content of sludge is further reduced by virtue of contact between hot air and a filter-pressed sludge cake after filter pressing of the double-diaphragm filter press.

The invention relates to the technical field of sewage treatment, in particular to low-resistance energy-saving environment-friendly sewage treatment filter pressing equipment and a filter pressing method thereof.The low-resistance energy-saving environment-friendly sewage treatment filter pressing equipment comprises a fixing frame used for supporting the whole equipment; the supporting frame is supported through the fixing frame, the supporting frame is used for installing the stroke jolting assembly and the multiple filter pressing assemblies, the stroke jolting assembly is used for conducting reset jolting on the filter pressing assemblies, and the filter pressing assemblies are used for conducting filter pressing forming on sewage; the extrusion assembly is used for pushing the limiting assembly to extrude the plurality of filter pressing assemblies; and the limiting assembly is used for limiting sliding of the extrusion assembly. Extra acting force can be provided through the stroke bumping assembly and the vibration mechanism, it is guaranteed that mud cakes can well fall off under various conditions, mud cake residues are reduced, and normal operation of a mechanical structure is guaranteed.

The invention provides sludge biochar as well as a preparation process and application thereof, and relates to the technical field of biochar materials. The invention relates to a preparation process of sludge biochar. The preparation process comprises the following steps: S1, conditioning sludge to obtain pretreated sludge; s2, dewatering the pretreated sludge to obtain sludge dewatered sludge cakes; s3, performing pyrolysis treatment on the sludge dewatered sludge cake to obtain the sludge biochar. The obtained sludge biochar is low in environmental risk and high in fertilizer efficiency.

The invention discloses iron modified coconut shell biochar as well as a preparation method and application thereof, and relates to the technical field of sludge treatment. The method comprises the following steps: performing pyrolysis carbonization on coconut shell powder, cooling, and sequentially grinding, sieving, cleaning and drying to prepare original coconut shell biochar; soaking in a hydrochloric acid solution, stirring, cleaning and carrying out suction filtration to obtain a precipitate; and soaking in a ferric chloride solution, stirring, performing ultrasonic treatment, washing, performing suction filtration, drying and sieving to prepare the iron modified coconut shell biochar. The iron modified coconut shell biochar has a certain flocculation effect in the sludge conditioning process, the particle size of sludge flocs is increased, the compressibility of sludge can be improved, the permeability of sludge cakes can still be kept under large mechanical pressure, and the filter capacity of the sludge can be improved. The problem that an efficient sludge conditioner is lacked in the prior art is solved.

The invention relates to a method for improving the dewatering performance of organic sludge by using a polyether demulsifier, and belongs to the technical field of municipal sludge treatment. The epoxyethane / epoxypropane block polyether is utilized to effectively destroy a stable oil-water emulsification system in the organic sludge, reduce interfacial tension and promote water release, and the dehydration performance of the organic sludge is remarkably improved by destroying an oil-water interfacial film structure. By utilizing the method disclosed by the invention, the dehydration efficiency of the organic sludge can be remarkably improved, the capillary water absorption time of the sludge and the specific resistance of the sludge are remarkably reduced, the Zeta potential of the sludge becomes closer to a positive value, the median particle size of the sludge is remarkably improved, and the water content of a sludge cake is greatly reduced; the method is easy and convenient to operate, existing dehydration equipment can be directly utilized, and extra investment is not needed; the adding proportion of the demulsifier can be optimized according to actual sludge characteristics, so that the medicament cost is saved; the method provided by the invention provides an economic and efficient technical scheme for organic sludge treatment and disposal, and sludge reduction and recycling can be promoted.

The invention provides a low-carbon dehydration treatment method for high-organic-matter sludge, and belongs to the technical field of sludge treatment. A low-carbon dehydration treatment method for high-organic-matter sludge comprises the following steps that food wastewater sludge is fed into a conditioning tank, a ferric chloride solution is added, the mass of FeCl3 accounts for 3.3%-7.0% of the mass of absolute dry sludge, and a mud cake is obtained after stirring, standing and filter pressing are conducted. According to the method, concentration is canceled, lime and PAM are not added, sludge self-flocculation is used in cooperation with low-dosage ferric chloride conditioning, the treatment time is shortened to 2.5 hours from 4 hours or above, the dosage of ferric chloride is reduced by about 50%, the efficiency is remarkably improved, the cost is reduced, and meanwhile the treatment cost is reduced. The problems that the pH value of a mud cake is too high, the calorific value is reduced, and the follow-up disposal approach is limited due to addition of lime are thoroughly avoided, and efficient, low-carbon and low-cost collaborative optimization of sludge dewatering and recycling is achieved.

The utility model discloses an electroplating sludge filter pressing and collecting device which comprises a filter pressing frame, a falling groove is formed in the bottom of the filter pressing frame, a hopper is arranged at the position, corresponding to the falling groove, of the bottom of the filter pressing frame, and a conveying belt is arranged at the position, under the hopper, of the bottom of the filter pressing frame. A lifting hook assembly is arranged at the position, located at the downwards-inclined end of the conveying belt, of the lower surface of the filter pressing frame, a lifting belt is connected to the lifting hook assembly in a hung mode, and a woven ton bag is arranged on the lifting belt. The lifting hook assembly, the lifting belt and the woven ton bag are arranged, a sludge cake falls onto the conveying belt through the falling groove, then the conveying belt conveys the sludge cake to the woven ton bag position and then the sludge cake falls onto the woven ton bag to be bagged, and after the woven ton bag is full, the woven ton bag is conveyed to a designated place through a forklift to be placed. Therefore, the sludge cake can be treated without waiting for the arrival of a loading and transporting vehicle, and the effect of pre-bagging the sludge cake by using the woven ton bag is achieved.

The utility model discloses a kind of pressure filters of quick vibration and knock unloading, including frame and magazine, the top of the frame is provided with magazine, the top of the magazine is provided with multiple filter plates, the outer wall of the magazine is symmetrically provided with first integrated frame, the inside of the first integrated frame is movably installed with first screw rod, the side wall of the first integrated frame is provided with second stepper motor, and the output end of second stepper motor is connected with first screw rod, the surface of the first screw rod is all equipped with first threaded sleeve, and first threaded sleeve is connected with first screw rod by screw thread, the top of the first threaded sleeve is all provided with integrated plate. The utility model not only realizes reciprocating vibration and knock to knock filter plate to make sludge cake and filter plate separate, facilitate to the movement vibration and knock of multiple filter plates in turn and to the cleaning and scraping cleaning of sludge, and improve the convenience of filter plate vibration and knock cleaning and the efficiency of cleaning sludge.

The utility model relates to the technical field of muddy water separation devices, in particular to a floating type muddy water separation device for discharging muddy water, which comprises a treatment tank and a mounting assembly, the mounting assembly comprises a transverse plate, a winding component, a filter cartridge, a floating plate, a mounting groove, a locking bolt, a connecting component, a communicating pipe, a water pump, a connecting plate and a limiting rod; a plurality of submersible stirrers are arranged at the bottom; after uniform mixing, the slurry is pumped into a filter press for dehydration; the dehydrated clear water is recycled; filter-pressed mud cakes are conveyed out and are changed along with the water level through a floating plate, the clear water on the upper layer is pumped by a water pump, and silt is filtered through a filter cartridge, so that the water pump is prevented from pumping out; the filter cartridge is fixed in the mounting groove through a locking bolt and is convenient to disassemble, the filter cartridge is connected with the communicating pipe through a connecting component, when the filter cartridge needs to be disassembled, the floating floating plate is lifted to a proper height through a winding component, and a limiting rod is used for limiting the sliding direction of the floating plate.

The utility model discloses an assembly type cut-off water recovery remote control electric device, and relates to the technical field of dehydration auxiliary equipment, the assembly type cut-off water recovery remote control electric device comprises an installation body and an external controller, the opposite side walls of the installation body are respectively provided with a plurality of supporting frames, the installation frames are provided with a track, a chain wheel track and a water tank, a plurality of guide wheels are mounted in the rails, a mounting frame is mounted on the guide wheels together, a water intercepting plate is mounted in the mounting frame, a motor is mounted on the lower wall surface of the mounting frame, and a chain wheel assembly is mounted at the output end of the motor through a rotating shaft. In order to achieve the water intercepting and recycling effect and smooth flowing of sewage to the water tank, the water intercepting plate is arranged to be in a wave shape and is installed in a height difference mode, so that the flow speed of the sewage to the recycling water tank is smooth, the sewage is not prone to backflow and overflow, and convenience is brought to maintenance and cleaning of the water intercepting plate.

A production method of carbon dioxide fixing sludge fine powder as a low-carbon binder. Water is added to residual concrete or returned concrete to form it into a slurry, gravel and sand are separated and removed therefrom, fine sand is separated and removed from the sludge water by a wet cyclone to obtain concentrated sludge water, and the concentrated sludge water is dehydrated to obtain a sludge cake. The sludge cake is put into a rotary drum, hot air and highly concentrated carbon dioxide are supplied into the rotary drum, the carbon dioxide is fixed and is crushed and dried to obtain carbon dioxide fixing sludge fine powder. Alternatively, the sludge cake is crushed and fractured to obtain sludge fine powder. This sludge fine powder is exposed to highly concentrated carbon dioxide to obtain carbon dioxide fixing sludge fine powder.

The invention relates to an efficient sludge dewatering method based on ball milling. The method comprises the following steps: (1) preparing a ball mill and sludge with the water content of 80%; (2) putting the sludge with the water content of 80% into the ball mill; (3) opening the ball mill, and enabling the sludge with the water content of 80% to rotate in the ball mill; (4) when the ball mill rotates, a large number of steel balls in the ball mill are thrown and hit out of order to collide with each other and are in full contact with the sludge with the water content of 80% at the same time, so that polyacrylamide plastic molecular chains in the sludge with the water content of 80% are broken, and polyacrylamide cells are split and broken to release water molecules; (5) pumping water molecules to a dehydrator for dehydration through a slurry pump of the ball mill; and (6) obtaining the modified sludge with the water content of less than 50%. According to the method, the dehydration rate of the sludge can be improved, and the sludge cake with the water content of 50% or below is obtained and can be better recycled.

The present invention provides a method for preparing purified recycled terephthalic acid and purified recycled terephthalic acid obtained thereby, the method comprising the steps of: treating waste polyester with an alkylated aromatic compound, a polarity control compound, and a solid-phase alkaline catalyst to form a composition comprising a terephthalic acid metal salt; ultrasonically treating the composition comprising a terephthalic acid metal salt; filtering the ultrasonically treated composition comprising a terephthalic acid metal salt to obtain a sludge cake; adding purified water to the sludge cake to obtain a terephthalic acid metal salt from which impurities have been removed; and treating the terephthalic acid metal salt, from which impurities have been removed, with an acidic solution to precipitate terephthalic acid.

The utility model belongs to the technical field of sludge treatment equipment, and particularly relates to a double-ring chain scraper conveyor suitable for sheet-shaped dry sludge cakes, which comprises a machine body, two gears rotationally connected to two end parts of the machine body, and a scraper conveyor belt connected to the two ends of the machine body, the chain is arranged on the two gears in a matched mode; the scrapers are fixedly connected to the chain at equal intervals; and the material storage frame is located below the discharging port of the machine body, and a discharging component is installed on a supporting frame fixed to the top of the material storage frame. The double-row chain type mud cake conveyor and the double-chain type structure are arranged, the scrapers distributed at equal intervals are fixed to the two chains, and mud cakes are located between the two rows of scrapers in the using process, so that the mud cakes are better in stability and cannot fall off in the conveying process, meanwhile, the discharging component is arranged on one side of the machine body, and the conveying efficiency is improved. The mud cake can be looser, subsequent transportation is facilitated, and the problems that at the present stage, a device is poor in operation stability, prone to falling and the like are solved.

The application discloses a self-adaptive constant-speed discharging screw extruder, and belongs to the technical field of sludge treatment. The self-adaptive constant-speed discharging screw extruder comprises a driving mechanism and a mounting platform, the driving mechanism is connected with an extrusion screw through a transmission mechanism, a mixing chamber, a uniform chamber and an agglomeration chamber are arranged outside the extrusion screw, a liquid discharge assembly is mounted on the outer wall of the uniform chamber, two symmetrically-arranged supplementary pipes are arranged in the liquid discharge assembly, and filter covers are fixed to the inner walls of the upper and lower ends of the supplementary pipes. The self-adaptive constant-speed discharging screw extruder can actively remove the thin sludge mixture with low solid content above the meshing area through the arrangement of the supplementary pipes and the suction plate, the total amount of liquid needing to enter the high-pressure section is reduced, the load of the subsequent extrusion section is reduced, the extrusion of solid substances can be more focused, the solid content of the final sludge cake and the processing capacity of the equipment are improved, the upper free treatment agent liquid is selected before extrusion dewatering, the utilization rate of the treatment agent is improved, and the operation cost is reduced.

This invention discloses a system and method for continuous and efficient hydrolysis of municipal sludge. The system includes a sludge receiving and storage device, a slurry tank, a heat exchange device, a preheating tank, and a multi-stage hydrolysis flash evaporation unit connected in sequence, as well as a product collection unit. The multi-stage hydrolysis flash evaporation unit is connected to the heat exchange device, which is connected to the product collection unit via a condenser. The multi-stage hydrolysis flash evaporation unit includes a primary flash tank, a hydrolysis reactor, and a secondary flash tank connected in sequence. Both the primary and secondary flash tanks are connected to the steam inlet of the heat exchange device. Using this system to hydrolyze municipal sludge, the moisture content of the dewatered sludge cake reaches 17%, which is 43% lower than that of existing technologies. The COD value, ammonia nitrogen value, and total nitrogen value of the sludge hydrolysate are increased by an average of approximately 65% ​​compared to existing technologies. This system has a high degree of automation, good stability, and low operating costs, effectively improving the hydrolysis efficiency and degree of hydrolysis of municipal sludge.

This utility model discloses a sludge treatment device, including: a filter press; a locking ring is fixedly installed at one end of the filter press's thrust plate; a concentration tank is fixedly installed inside the locking ring; a sludge separation mechanism is connected to the lower surface of the concentration tank; the discharge end of the sludge separation mechanism is connected to the feed inlet of the filter press; and a compression mechanism is fixedly installed at the lower end of the filter press. The compression mechanism can receive the sludge cake produced after filtration and compress it into blocks. This application, through the design of the concentration tank and the sludge separation mechanism, allows for pre-separation of water in the concentration tank, enabling preliminary concentration of the sludge. This significantly reduces the processing volume and time of the subsequent filter press, improving overall processing efficiency. The secondary compression of the sludge cake significantly reduces the sludge volume, achieving a high degree of sludge reduction and lowering transportation costs and subsequent disposal difficulties.

The present application relates to the field of sludge treatment, in particular to an environment-friendly sludge treatment equipment. The equipment comprises a sludge suction pump and a dehydration mechanism connected with the sludge suction pump. The dehydration mechanism comprises a treatment box and a pipeline. A rotating screen cylinder is arranged in the pipeline. The dehydration mechanism further comprises a filter pressing assembly and a disturbance assembly arranged in the treatment box in sequence from top to bottom. A linkage is arranged between the filter pressing assembly and the disturbance assembly. A medicament nozzle for spraying a solidifying agent is arranged on the treatment box opposite to the disturbance assembly. A discharge passage is arranged on the treatment box below the disturbance assembly. The present application realizes efficient dehydration of sludge and formation of sludge cake through the synchronous operation of the conveying belt and the pressure belt and the pressure roller. The linkage drives the disturbance assembly to uniformly disturb the sludge cake, which improves the mixing effect of the solidifying agent, thereby completing the continuous operation of dehydration and stabilization treatment.

The invention relates to the field of sludge treatment, in particular to a negative pressure sludge discharger device which comprises a bottom plate, semicircular covers, a filter pressing mechanism, a discharging mechanism, a cutting mechanism, an overflow mechanism, a hydraulic pump and a conveying belt mechanism, the semicircular covers are symmetrically arranged at the top of the bottom plate, the two semicircular covers are connected through a hinge, and one semicircular cover is connected with the bottom plate and the filter pressing mechanism. Cascade precipitation and automatic scraping cleaning of fine particles in filtrate are achieved through the V-shaped grooves in the overflow plate, anti-blocking is conducted on the filter cloth through negative pressure formed by rapid rising of the filter pressing block, and when mud cakes are discharged, sealing and leakage prevention are achieved through the leakage-proof plate, and even discharging is achieved through the inclined face of the cutting plate and the cutting groove. Therefore, the technical problems of sealing failure and frequent maintenance caused by easy blockage of filter cloth, easy blockage of a filter screen and residual discharged materials of the existing equipment are effectively solved, and the operation continuity and the dehydration efficiency of the device are improved.

The application discloses an iron electrode coupled anaerobic granular sludge membrane bioreactor, which comprises a reactor body, a granular sludge bed and a clarified liquid are sequentially arranged in the reactor body from bottom to top, an iron negative electrode and a metal mesh positive electrode are oppositely arranged in the clarified liquid, and a water outlet pipe is communicated with the side wall of the reactor body corresponding to the clarified liquid. 2+ , Fe 2+ has a strong flocculation effect, reduces the content of suspended sludge in the clarified liquid, the released divalent iron can connect various anions such as hydroxyl, acid radical, sulfate radical and phosphate radical ion to form large flocculation sludge, reduces soluble protein and polysaccharide and is converted into solidified extracellular polymer, reduces pore size blockage and reduces the formation of high-strength attached sludge cake layer, and therefore irreversible membrane pollution is reduced.

The invention discloses a sewage treatment method capable of reducing sludge production, which comprises the following steps: S1, sewage firstly enters an anaerobic hydrolysis reactor for hydrolytic acidification, and then the sewage enters an anaerobic sludge interception reactor; s2, carrying out nitrogen and phosphorus removal and organic matter degradation on the water treated in the step S1; s3, the water body subjected to biochemical treatment in the step S2 enters a secondary sedimentation tank, and solid-liquid separation is completed; s4, residual sludge discharged from the secondary sedimentation tank and the anaerobic sludge interception reactor is collected in a sludge tank and then enters a sludge concentration tank, and the water content of the sludge is reduced; s5, the concentrated sludge enters a special aerobic starvation reactor; s6, dehydrating equipment is used, and the treated mud cakes are made into dry and hard mud cakes. According to the method, the sludge yield is reduced from the source, and the potential pressure on the environment is fundamentally relieved; no harmful chemical agent is added in the process, so that secondary pollution is avoided; the reduced sludge is more stable, and favorable conditions are created for subsequent safe resource utilization.