322 results about "Electro flocculation" patented technology

The present invention discloses an ultrasound, magnetic field, pulse electrocoagulation and membrane composite waste water treatment method, and an apparatus thereof. The technological process of the method comprises that: waste water is conveyed to an electrocoagulation reactor by a pump in an up-flow manner, wherein an ultrasonic generator, electrode plates and a permanent magnet are arranged inside the electrocoagulation reactor, the electrocoagulation voltage is 5-30 V, the current is 5-40 A, the ultrasonic frequency is 20-100 KHz, the ultrasonic power is 100-400 W, and the magnetic field strength is 0.1-0.3 T; the water sample flows through the positions between the electrode plates, and performs circulating flowing by an outer circulation pump; the waste water is treated for 5-12 minutes by the synergism of the ultrasound, the magnetic field, and the pulse electrocoagulation, and then is conveyed in a sedimentation tank by a pump; the supernatant is conveyed to a membrane assembly to carry out filtration to further separate the mud and the water by a pump, wherein the mud is subjected to concentration treatment and recovery, and the water is subjected to standard discharge. The method of the present invention has the following advantages that: the method is applicable for treatments of a lot of the waste water, and the effluent quality is good and stable.

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method and a device for treating phosphorus wastewater by adopting a multi-electrode baffling electric flocculation process. The PH value of wastewater is regulated with alkaline liquor to 7.0-8.0; the regulated wastewater is pumped into an electric flocculation tank through a peristaltic pump, is subjected to electrolytic flocculation treatment through the baffling of a multi-electrode under the condition of aeration, and then is discharged through an overflow launder, the discharged water is collected and left to stand for 30 minutes, a liquid supernatant is discharged, a floc is recycled; a power supply of the electric flocculation tank is a direct current power supply, the current density is 1.27-5.08mA/cm<2>, and the electrolysis time is 2 minutes to 48 hours. The technical characteristics are as follows: the wastewater baffles along the multi-electrode, then the short stream of the wastewater is avoided, the chance of enabling a pollutant in the wastewater to be in contact with a high-concentration flocculating agent in an electrolysis plate is increased, the flocculent precipitation is promoted, so that the pollutant treatment effect is improved. The multi-electrode baffling electric flocculation process is suitable for treating inorganic phosphorus wastewater at medium and low concentrations, needed equipment is simple, easy in operation and low in cost, and runs stably, so that the process is an electrochemistry phosphorous removal process having a high potential.

The invention discloses an application method of high-property activated carbon fibers in the treatment of industrial waster water by electrocoagulation. In the application method, the industrial waster water is treated by the electrocoagulation, the high-property activated carbon fibers are used as an electrode for electrolysis and has a composition of activated carbon. The high-property activated carbon fiber electrode has the advantages of high electrolysis efficiency, wide application range, low use cost and no secondary pollution, and is beneficial to water reuse treatment by reverse osmosis, thus the high-property activated carbon fibers have an extremely giant application prospect in the process of treating industrial waster water by high-frequency high-voltage impulse electrocoagulation.

The invention relates to the technical field of landfill leachate treatment, in particular to a landfill leachate treatment method. The landfill leachate treatment method comprises the following steps: step 1, treatment in an adjusting tank; step 2, electric flocculation treatment; step 3, anaerobic tank treatment; step 4, treatment in an anoxic tank; 5, aerobic treatment on the MBR membrane reactor; step 6, filter treatment; step 7, NF membrane and RO membrane treatment; and step 8, treatment on the landfill leachate concentrated solution. The landfill leachate treatment method can effectively reduce the conductivity and part of COD, ammonia nitrogen and other pollutants in the leachate; the biodegradability and stability of the landfill leachate are improved, the occupied area of a biochemical treatment system is reduced under the same condition, the service life of a membrane system is prolonged, the water production rate of the membrane system is improved, and meanwhile, the problems encountered in recharging and evaporation of a concentrated solution are effectively solved.

The invention belongs to the field of heavy metal wastewater treatment and provides an electric flocculation unit, an electric flocculation device and a heavy metal wastewater treatment system. The electric flocculation unit comprises a shell, an anode bar, a cathode tube, iron carbon ball filler, a rotary type scraper device, an ultraviolet lamp, an aerating device, a power module and a liquid conveying mechanism, wherein the cathode tube is vertically arranged in the shell, the anode rod is vertically arranged in the cathode tube, the rotary type scraper device and the ultraviolet lamp are arranged in the cathode tube, the rotary type scraper device is movably connected with the shell through a bearing, the shell is detachably connected with the cathode tube and the anode bar, an insulating plate where a diffluence hole is formed is detachably connected to the cathode tube, and the iron carbon ball filler is stacked on the insulating plate. The electric flocculation device disclosed by the invention comprises a plurality of electric flocculation units, supports and liquid storage tanks, wherein the electric flocculation units, the supports and the liquid storage tanks are communicated through pipelines to be in parallel connection or serial connection. The heavy metal wastewater treatment system comprises the electric flocculation device, an air floating device and an ion exchange device, wherein are sequentially connected with each other. The heavy metal wastewater treatment system disclosed by the invention has a good heavy metal wastewater treatment effect and convenience in disassembling and cleaning.

The invention relates to a multi-chamber multidimensional electro-coagulation apparatus for high ammonia nitrogen wastewater. The multi-chamber multidimensional electro-coagulation apparatus comprises: an electro-coagulation apparatus shell; a high voltage pulse power supply; anode plates, cathode plates, separator plates, particle electrodes and aeration areas which are arranged in the shell; and auxiliary assemblies arranged on the shell, wherein the anode plates and the cathode plates are respectively provided with a composite catalyst coating layer, and are respectively connected with the positive electrode and the negative electrode of the high voltage pulse power supply. The multi-chamber multidimensional electro-coagulation apparatus adopts the high voltage pulse power supply as an apparatus power supply, and spaces between the cathode plates and the anode plates are filled with the particle electrodes, so the energy consumption is greatly reduced, the specific surface area of the electrodes are increased, and the current efficiency is improved; and micro bubbles generated in the electrolysis process have an air flotation effect, so the wastewater treatment effect of the apparatus is totally greatly improved. The apparatus has the advantages of convenient operation, integration electro-coagulation, electro-catalysis and air flotation, and realization of continuous multistage treatment of wastewater through multiple chambers.

The invention relates to a design scheme of standardized electric flocculation equipment by a core idea that the electrolysis process and the coagulation floatation process are separately realized in two unit processes and are designed according to respective principles. The standardized electric flocculation equipment consists of a flow regulation device, an electrolysis reactor, a separation device, a power supply and a control system, wherein a plate of the electrolysis reactor is placed horizontally, connected in bipolar type, and combined with an electrode fixing frame to form a flow guide system; the separation device selects a vertical flow type floatation tank with water fed in the center and water discharged at periphery, and is equipped with a central flow guide cylinder, a slag and mud scraping device, and a slag and mud discharging device and the like; and the power supply adopts a direct-current stabilized power supply of a silicon-controlled integrated circuit, which has automatic timed electrode reversing function. The design scheme has the advantages of reasonable structure, high process efficiency, good effluent quality and high safety and the like, and can ensure that the energy consumption is 75-90% lower than that of the traditional equipment, strengthen the coagulation floatation process, reduce the blockage, and prevent the passivation of the electrode.

The invention discloses a wireless electric flocculation water treatment device based on bipolar electrochemical principles. The device comprises an electrolytic tank, a power supply, a main anode and a main cathode, wherein the main anode and the main cathode are arranged inside the electrolytic tank and are respectively electrically connected with the power supply; at least one bipolar electrode is arranged between the main anode and the main cathode inside the electrolytic tank; and the main surface of the bipolar electrode or a main shaft is not perpendicular to the direction of an electric field line in the electrolytic tank. As the bipolar electrode which is not connected with an external circuit is arranged between the main anode and the main cathode, and the main surface or the main shaft is not perpendicular to the direction of the electric field line in the electrolytic tank, the bipolar electrode is subjected to an electrochemical reaction under polarization of the electric field of a solution, a high-activity flocculant is generated, meanwhile action of electroflotation, oxidation reduction and the like are resulted, dissoluble and suspended pollutants and colloids in water can be effectively converted and removed, and thus the purpose of sewage purification is achieved. The wireless electric flocculation water treatment device has the characteristics that the structure is simple, electrodes are conveniently replaced, electrode materials are saved, the purification efficiency is high, blocking is not easily caused and the cost is low.

The invention discloses a method and equipment for treating drilling fracturing return liquid of an oil and gas field. According to the method, fracturing return liquid is subjected to oil and gas separation, pH value regulation, electric flocculation, primary physico-chemical precipitation clarification, electrocatalytic oxidative degradation, secondary physico-chemical precipitation clarification, mud-water separation device treatment and discharge or recycling, three functions including oil recycling, water treatment and mud curing of the drilling fracturing return liquid can be realized, standard discharge or reinjection application of the fracturing return liquid can be realized, and the aim of resource utilization can be realized. The method has great social and economic meanings for pollutants in oil field drilling operation, and can be used for reducing cost for transportation, storage and treatment of fracturing liquid and recycling water in other application on the ground.

The invention relates to the technical field of wastewater treatment, in particular to a chemical nickel wastewater treatment method and a treatment system used by the same. The treatment method sequentially comprises steps as follows: (1) chemical nickel wastewater is introduced into a pH regulating tank, and the chemical nickel wastewater is adjusted to be acidic; (2) the chemical nickel wastewater is introduced into an electric flocculation system, wherein the electric flocculation system comprises a first electrode and a second electrode, the first electrode is an anode, the second electrode is a cathode, the first electrode is made of iron, complexing chains or chelating chains in the wastewater are broken through electric connection, and nickel in the wastewater participates in a replacement reaction in a molecular grain state to be separated out in a form of hydroxide precipitate; (3) wastewater obtained in the step (2) is introduced into a pH readjusting tank, and the wastewater is adjusted to be alkaline; (4) the wastewater is introduced into an MBR (membrane bioreactor) membrane pool to be filtered; (5) the wastewater is introduced into a resin tank for further adsorptionof metal nickel. The treatment method is simple to operate, addition of a recapturing agent is not required, the amount of produced sludge is small, and rear-section MBR membranes cannot be blocked.

The invention discloses a method for treating electroplating wastewater based on low voltage pulsed electric flocculation technology. The method comprises the following steps: treating electroplating wastewater by pulsed electric flocculation technology, wherein the time for the treatment is 20 min to 60 min, pulse power supply is an industrial-frequency alternating current of 220 V and 50 Hz, output voltage of the pulse power supply is 0 to 36 V, duty ratio is 10% to 90%, output frequency is 100 Hz to 1000 Hz, output current density is 0.5 A/dm<2> to 3.5 A/dm<2>, the anode of the electric flocculation is aluminum electrodes, the cathode is stainless steel electrodes, and the distance between plate electrodes is 1 cm to 10 cm; adding lime into the electroplating wastewater treated by pulsed electric flocculation to adjust the pH value of the wastewater to be 7.4, wherein the weight ratio of lime to the treated wastewater is 1:200 to 1:40; adding diatomite into the solution, wherein the weight ratio of diatomite to the electroplating wastewater treated by pulsed electric flocculation is 1:200, standing the solution for deposition, and discharging or recycling the electroplating wastewater. The method provided in the invention is simple and easy to implement and enables low cost and high efficiency; treated wastewater can be reused or discharged directly.

Belonging to the technical field of sewage treatment, the invention discloses a high efficiency sewage treatment method. The method includes: collecting sewage, then letting the sewage enter an adjustment tank and mixing the sewage evenly, then subjecting the sewage to electric flocculation in an electric flocculation tank, letting the water from electric flocculation pass through a sedimentation tank, making the sludge settling in the sedimentation tank enter a plate-frame pressure filtration system, letting the supernatant of the sedimentation tank enter an immersed ultrafiltration tank, returning the ultrafiltered concentrate water into an adjustment tank, making the ultrafiltration produced water enter a reverse osmosis system, returning part of reverse osmosis concentrate water to the adjustment tank, and discharging part of the reverse osmosis concentrate water to the outside, and reusing the reverse osmosis produced water in line with the reuse standards in production. The method provided by the invention combines electric flocculation technology with membrane separation technology, and reaches the purposes of improving the produced water quality and enhancing the sewage reuse rate.

The invention discloses a sequence flow return type sewage treatment method which comprises the following steps: conveying sewage to an anoxic/anaerobic tank; conveying the sewage into a contact oxidation tank and performing aeration oxygenation on the sewage in the contact oxidation tank; conveying the supernatant obtained by precipitating in the contact oxidation tank into an electric flocculation and sedimentation tank; returning and mixing the sewage part subjected to electric flocculation, conveying the other part of sewage subjected to electric flocculation into a membrane tank for performing mud-water separation, and discharging the treated water. According to the treatment device disclosed by the invention, an anoxic/anaerobic tank, a contact oxidation tank, an electric flocculation and sedimentation tank and a membrane tank are separated on a treatment unit tank, wherein the contact oxidation tank is communicated with the electric flocculation and sedimentation tank by virtue of a supernatant conveying pipe; a flocculation solution return pipe is arranged on the electric flocculation and sedimentation tank; and the electric flocculation and sedimentation tank is communicated with the membrane tank. The mutual interference and restriction between electric flocculation and biological treatment can be avoided, and the efficiency can be maximized. The method and device disclosed by the invention are widely applied to treatment of domestic sewage on ships and lands and industrial wastewater.

The invention discloses an electrocoagulation waste water treatment device. A pipeline is multisegmental, a detection value is arranged on the upstream end of each segment of pipeline, a dosing valve is arranged on the downstream end of each segment of pipeline so as to realize the fact that any pipeline segment is filled with medicaments, different medicaments can be added in different pipeline segments and different flow ways so as to meet the treatment demand; secondly, an anode and a cathode are arranged on each segment of pipeline of the electrocoagulation waste water treatment device, the anode and the cathode exist in a pipeline, an anti-leakage rubber tube sleeves the outsides of the pipelines so as to provide a closed reaction space, the generated harmful gas cannot be dispersed and is easily controlled, the reaction is complete, and the combination is convenient; furthermore, a pressurizing valve is arranged at a water outlet of the electrocoagulation waste water treatment device to be matched with the airtight environment in each segment of pipeline, so that the pressurization on the gas can be conducted, the solubility of the gas is higher, and the treatment effect is better; in conclusion, by adopting the electrocoagulation waste water treatment device, the sewage treatment effect can be greatly improved, and the reaction can be shortened.

A comprehensive and independent unit for the treatment of Effluents or Sewage and the system that uses it. This unit requires little space and it has a high capacity to mitigate effluent parameters. This treatment is performed by means of a single reactor which carries out the electrocoagulation, electro flocculation, electro flotation, electrooxidation and electrohydrolization and it drains in a high performance decanter which is a single container. The unit is composed of a reactor (4) that sends its clotted effluents into a decanter (5) and its foam into a foam collector (6). The decanter (5) is placed adjacent to the foam collector (6) and has the capacity to discharge its foam into the collector (6); the whole process is carried out without the need for any auxiliary recirculation devices.

The invention provides a coupling device and process for deeply treating landfill leachate. The coupling device comprises an electrical flocculating device, a primary microfiltration ceramic membranedevice and a secondary ultrafiltration ceramic membrane device, wherein the electrical flocculating device is connected with the primary microfiltration ceramic membrane device through a first water pump; the primary microfiltration ceramic membrane device is connected with the secondary ultrafiltration ceramic membrane device through a second water pump; the membrane pore size of an ultrafiltration ceramic membrane of the secondary ultrafiltration ceramic membrane device is smaller than that of a microfiltration ceramic membrane of the primary microfiltration ceramic membrane device. According to the coupling device for deeply treating the landfill leachate, the electrical flocculating device, the primary microfiltration ceramic membrane device and the secondary ultrafiltration ceramic membrane device are arranged and are successively used for carrying out electrical flocculation, primary filtration and secondary filtration on the landfill leachate which are not up-to-standard after the landfill leachate is subjected to biochemical treatment, so that the landfill leachate which is up-to-standard can be obtained; the whole coupling device is simple, low in up-front investment cost,low in operation cost and low in maintenance cost.

The invention discloses a treating method for highly-emulsified oily sewage. The treating method includes the following steps: enabling the oily sewage to flow through a solid-phase demulsifier; subjecting the oily sewage to electrolytic condensation; performing initial filtration; separating the oily sewage into sump oil and separated water through oil-water separation; discharging the sump oil, and refinedly filtering and discharging the separated water; when the discharged water does not meet discharge standards, returning the refinedly-filtered water to repeat the steps. A treating device for the highly-emulsified oily sewage comprises an electric flocculation device, an initial filter and an oil-water separator which are communicated in sequence. A sewage input pipe of the electric flocculation device penetrates a cylinder of the electric flocculation device to be obliquely arranged on the cylinder of the electric flocculation device. A stack aggregation and separation device is arranged in the oil-water separator. A demulsification device is communicated in front of the electric flocculation device. A filter material filtering device (10) is communicated in rear of the oil-water separator. The treating method can promote efficient aggregation and separation of oil droplets in oil-in-water type emulsion liquid and is particularly suitable for treatment of the highly-emulsified oily sewage.

The invention discloses a treatment method for electroplating wastewater and sludge. The treatment method comprises the following steps: (1) evaporating and concentrating electroplating wastewater, discharging condensed water or recycling the condensed water to an electroplating process, and mixing and slurrying the concentrated solution, electroplating sludge and a carbon source; (2) carrying outmicrowave hydrothermal treatment on slurry under the conditions that a temperature is 130-250 DEG C and a pressure is 2-10 MPa so as to allow a carbon source and metal elements in the slurry to reactin situ to generate a carbon-based catalyst; (3) introducing an oxidant, carrying out catalytic wet oxidation on the slurry having undergone hydro-thermal treatment, carrying out solid-liquid separation after the reaction is finished, carrying out drying treatment on a solid phase, and recycling the treated solid phase as a catalyst; and (4) carrying out electric flocculation on a filtrate obtained by solid-liquid separation, wherein solid slag of electric flocculation is partially recycled to the electroplating sludge. According to the method, deep harmless and reduction treatment of the electroplating wastewater and the electroplating sludge is realized, and meanwhile, the recyclable catalyst for wet oxidation wastewater treatment is obtained through resource utilization.