17results about How to "Low mud production" patented technology

The invention belongs to the technical field of sewage treatment, particularly relates to a continuous flow aerobic granular sludge reaction device and process, and provides a continuous flow aerobic granular sludge reaction device and process aiming at the problem that the requirement of high emission standard is difficult to meet in the prior art. The micro-aerobic zone is communicated with the aerobic zone, spiral-flow aeration systems are uniformly distributed in the micro-aerobic zone, microporous aeration systems are uniformly arranged in the aerobic zone, and a plurality of aerobic granular sludge rapid granulation devices are mounted above the aerobic zone, so that rapid culture of the aerobic granular sludge and stable, efficient and low-cost continuous operation of an aerobic granular sludge technology can be realized.

The invention discloses a method for treating nitrogen in high-nitrogen wastewater by using autotrophic denitrification. The method comprises the following steps: S1, adjusting the pH value of to-be-treated high-nitrogen wastewater to 7.0-8.0 and the total nitrogen concentration to be less than or equal to 1000mg / L; s2, heating the high-nitrogen-content wastewater subjected to pH regulation in the step S1, and heating to 25-35 DEG C; s3, the high-nitrogen-content wastewater heated in S2 enters an autotrophic denitrification device from the bottom at a constant flow rate, the load of an autotrophic denitrification filter material is controlled to be 0.3-0.8 kgTN / t.d, and the water inlet flow rate is controlled to be 0.5-8 m / h; s4, enabling the wastewater to pass through the upper effluent of the autotrophic denitrification device to meet the treatment requirements. The method has the advantages of simple treatment process, wide application range, high load, small land occupation, no need of mechanical stirring, no need of additional organic carbon sources, extremely low sludge yield, effective reduction of the construction cost and the operation cost, and significant economic and environmental benefits.

The utility model discloses an integrated device for removing hypophosphite in wastewater. The integrated device comprises an oxidation column, a water inlet and a water outlet are formed in the two sides of the oxidation column respectively, the water outlet is connected to a sedimentation tank, an electrode plate is arranged in the sedimentation tank and connected to an external power supply, and a water outlet pipe is arranged on the sedimentation tank; comprising an ozone generator which is connected to an oxidation column through an air inlet pipe, and a concentration detector is arranged on the air inlet pipe. The ozone catalytic oxidation technology is adopted, the aluminum-based catalyst is adopted for catalyzing ozone to generate hydroxyl free radicals, hypophosphite in waste water is oxidized into orthophosphate, meanwhile, organic pollutants can be degraded, finally, ozone is decomposed to generate oxygen, new pollutants are not generated in the reaction, and the technology is a green technology. The pole plate material of the electric flocculation unit adopts an iron plate, iron ions are generated by electrifying and are combined with generated orthophosphate to form precipitate removal, no extra medicament is needed in the technological process, the mud yield is low, and the operation is simple and convenient.

This invention belongs to the field of wastewater treatment technology, specifically relating to a continuous flow aerobic granular sludge reactor and process. Addressing the problem that existing technologies struggle to meet high emission standards, this invention provides a continuous flow aerobic granular sludge reactor and process. The biological selection zone is connected to the microaerobic zone via a water passage, and the microaerobic and aerobic zones are interconnected. The microaerobic zone is uniformly equipped with a swirl aeration system, while the aerobic zone is uniformly equipped with a microporous aeration system. Multiple aerobic granular sludge rapid granulation devices are installed above the aerobic zone, enabling rapid cultivation of aerobic granular sludge and stable, efficient, and low-cost continuous operation of the aerobic granular sludge technology.

The invention relates to a composite phosphorus removal agent as well as a preparation method and application thereof. The composite phosphorus removal agent comprises 45wt%-75wt% of a modified inorganic high-molecular coagulant, 2wt%-15wt% of a modified natural high-molecular polymer, 5wt%-40wt% of inorganic salt, 0.5 wt%-5wt% of a coagulant aid and 0.1 wt%-0.5 wt% of a solvent, wherein the modified inorganic polymer coagulant comprises modified polyaluminum chloride and / or modified polyaluminum ferric chloride; the basicity of the modified inorganic polymer coagulant is 40-85 wt%; the modified natural high-molecular polymer is prepared from one or more of a dimethyl diallyl ammonium chloride-acrylamide-modified starch copolymer and a methacryloyloxyethyl trimethyl ammonium chloride-acrylamide-modified starch copolymer; the relative molecular mass of the modified natural high-molecular polymer is 50-450 million. The composite water purifying agent disclosed by the invention is low in cost and simple in production and preparation method, does not introduce excessive metal salts, does not cause secondary pollution and does not cause excessive metal in a water body, and has a better effect of removing phosphorus and turbidity under the condition of low water temperature.

The sewage treatment method can greatly reduce the sludge amount, and comprises the following steps: step 1, flocculants and magnetic powders are added into sewage to be treated, after magnetic flocculation, precipitation and magnetic separation recovery, preliminary purified water is obtained; step 2, microbial mixed stock solution containing anaerobic ammonia oxidation bacteria and aerobic granular sludge carriers are added into the preliminary purified water, and aeration and non-aeration cultivation reactions are alternately carried out in a sequencing batch reactor, so that water degradation and purification are completed, wherein, protozoa are added on the 2nd-3rd day of the cultivation reaction, metazoan is added on the 4th-5th day of the cultivation reaction, and the reactor enters a stable operation period on the 6th-14th day of the cultivation reaction; and step 3, the water after the reaction is sequentially subjected to filtration and disinfection treatment, and reaches the water standard; by constructing a complete micro-animal food chain from functional bacteria to protozoa and metazoan, and by utilizing the predation of higher micro-animals on lower microorganisms, the sludge is in-situ reduced, and the environmental and economic benefits are achieved.

The invention provides a composite COD (Chemical Oxygen Demand) remover as well as a preparation method and application thereof, and the composite COD remover comprises the following components in parts by weight: 20-40 parts of modified sepiolite mineral powder, 40-60 parts of ferrous sulfate, 10-20 parts of crystalline aluminum chloride and 5-10 parts of wooden activated carbon. The composite COD remover provided by the invention can be blended according to different water qualities so as to adapt to the requirements of different water qualities, and the dosage is determined according to the COD value. The composite COD remover provided by the invention is mixed in a dry stirring manner, and the modified sepiolite mineral powder and the wooden activated carbon are fully mixed with the ferrous sulfate and the crystalline aluminum chloride in a dry stirring manner, so that the ferrous sulfate and the crystalline aluminum chloride are uniformly distributed in pores of the modified sepiolite mineral powder and the wooden activated carbon and can be uniformly distributed in a system in a reaction process; for different types of refractory organic matter wastewater, by adjusting the proportions of all the components and utilizing the synergistic effect of all the components, the effect of efficient reaction can be achieved.

The invention relates to the technical field of wastewater treatment, in particular to a heavy metal capturing agent and a preparation method and application thereof. The heavy metal capturing agent provided by the invention comprises a compound with a structure as shown in a formula (I) and ferrous sulfide, and in the formula (I), R1 is C1-C6 alkylene. The heavy metal capturing agent is formed by using a compound of double-active sulfur atoms and acrylamide groups with strong chelating property and ferrous sulfide, heavy metals are chelated by using the double-active sulfur atoms, and the chelated heavy metals are flocculated by using good flocculability of the acrylamide groups; meanwhile, ferrous sulfide is oxidized in water to form ferric hydroxide with a coagulation effect, heavy metal is further flocculated and settled, the settling rate and removal efficiency of the heavy metal are improved, meanwhile, hydroxyl free radicals generated by the ferrous sulfide can degrade organic complexing ligands, the complexing property of wastewater is reduced, and the heavy metal removal efficiency is improved. The complexing agent is prevented from being continuously complexed with subsequent heavy metal.

The application provides a system treatment process for fluorine-containing wastewater, which comprises the following steps: a fluorine-containing wastewater treatment process, a sludge treatment process, a defluorination filter material regeneration process and a sludge waste liquid treatment process. The system treatment process for fluorine-containing wastewater has the advantages of low sludge yield, low flocculant consumption, low treatment cost, high adsorption capacity, greatly prolonged adsorption time of the adsorbent, reduced regeneration frequency, no discharge of regeneration liquid, and effectively solved problem of difficult treatment of by-products of traditional treatment processes.

The invention relates to a degradation treatment method and system for organic wastewater. The method comprises the following steps: adjusting the pH of the organic wastewater to be acidic; the method comprises the following steps: adding acidic organic wastewater and hydrogen peroxide into a photoelectric oxidation unit, carrying out electro-Fenton reaction on the hydrogen peroxide and an electrode group in the photoelectric oxidation unit to generate hydroxyl radicals for degrading the acidic organic wastewater, and regenerating Fe < 2 + > and the hydroxyl radicals in the solution through electrochemical reaction and ultraviolet excitation conjugation; adjusting the pH value of the wastewater subjected to the photoelectric oxidation treatment to be alkaline, adding a flocculating agent into the alkaline wastewater to obtain sludge precipitate and supernate, and performing subsequent treatment on the supernate. The regeneration rate of ferrous ions and hydroxyl radicals is improved by adopting a catalyst full-amount efficient utilization mode of natural precipitation of an induction iron electrode, electrochemical and ultraviolet light reduction and trace iron sludge precipitation, so that the degradation of organic matters in the organic wastewater is promoted.

The invention belongs to the technical field of wastewater treatment, and discloses an electrochemical treatment method and application of high-salt-content coal chemical wastewater, the electrochemical treatment method comprises the following steps: (1) injecting the high-salt-content coal chemical wastewater into an electrochemical reactor, taking a soluble metal electrode as an anode and a dimensionally stable electrode as a cathode to carry out an electric flocculation reaction, meanwhile, fluorine ions in the wastewater are removed in cooperation with the adsorption effect of a particle electrode; (2) after the wastewater is treated in the step (1), electrode reversal is performed on an electrode in an electrochemical reactor, an electrooxidation reaction is performed by taking a dimensionally stable electrode as an anode and a soluble metal electrode as a cathode, and meanwhile, the adsorption and electrooxidation degradation effects of a particle electrode are matched, so that refractory organic matters in the wastewater are removed; and (3) feeding the wastewater treated in the step (2) into a filtering device, filtering, and discharging. The method disclosed by the invention is simple and convenient in operation steps, small in occupied area and suitable for treating the refractory organic matters in the high-salt-content coal chemical wastewater.

The invention belongs to the technical field of wastewater treatment, and discloses an electrochemical treatment method and application of fluorine-containing wastewater, and the electrochemical treatment method comprises the following steps: the fluorine-containing wastewater enters an electrochemical reactor, and an electric flocculation reaction is carried out by taking a soluble metal electrode as an anode and a dimensionally stable electrode as a cathode to remove fluorine ions in the wastewater; carrying out electrooxidation reaction by taking a dimensionally stable electrode as an anode and a soluble metal electrode as a cathode, and removing refractory organic matters in the wastewater; finally, the wastewater subjected to electrooxidation treatment enters a filtering device, and is discharged after being filtered. The method disclosed by the invention is simple and convenient in operation steps, small in occupied area and suitable for treating the refractory organic matters in the fluorine-containing wastewater.

The application relates to the technical field of sewage treatment, and discloses a biological filter rotating disc system based on replaceable composite fillers and a nitrogen and phosphorus removal method. 2+ The biological filter rotating disc system supports online filler replacement and is suitable for upgrading and reconstruction of sewage plants and advanced treatment of industrial wastewater.

The present application belongs to the technical field of nitrogen-containing wastewater biological treatment, and relates to a method for reducing total nitrogen in nitrogen-containing wastewater to an ultralow concentration. The method combines nitrification with Biotra-DN. The formed system does not need a sedimentation tank and a sludge discharge system, has a small footprint, low investment, can reduce TN in water, including but not limited to dredging water and / or water from a lake after being divided, aquaculture wastewater, industrial wastewater, municipal wastewater and river water, to below 1 mg / L, only needs simple backwashing, has a short residence time, is simple in daily operation and maintenance, and is low in operation cost.

The invention provides a preparation method, an application and a regeneration method of a reproducible phosphorus removal fast separation ball. The preparation method of the reproducible phosphorus removal rapid separation ball comprises the following steps: S1, modifying pelelith to obtain modified pelelith; s2, soaking the modified pelelith in a rare metal solution, adjusting the pH to 10.0-11.0 and the temperature to 60-70 DEG C, stirring and soaking for 20-30 hours, washing with deionized water until the pelelith is neutral, and drying to obtain negative lanthanum pelelith; and S3, loading the lanthanum-loaded pelelith into the porous suspension ball to obtain the phosphorus removal rapid separation ball. The prepared phosphorus removal rapid separation ball can effectively remove total phosphorus in biochemical effluent, the phosphorus removal adsorption filler capable of being regenerated and desorbed can be obtained in a simple mode, the filler can be repeatedly used and is high in mechanical strength, small in abrasion and easy to operate, generated precipitates and filtrate can be utilized, and the phosphorus removal rapid separation ball has excellent economic benefits.

The application discloses a kind of full solid waste base water treatment materials and its preparation method and application, which is made of the following mass percentage of raw materials: scrap iron: 20~25%;Steel slag: 30~40%;Non-dangerous waste waste activated carbon: 15~20%;Engineering slurry dry powder: 15~20%;Waste glass: 5~8%;Waste wood fiber: 5~10%;The application is by using specific proportion of raw materials, the various solid wastes that originally need to be paid disposal are converted into high-performance water treatment functional materials, realizes "waste treatment", fundamentally subverts the high-cost mode of traditional water treatment materials depending on commodity raw materials, comprehensive porous adsorption, iron-carbon micro-electrolysis and biological membrane and other various phosphorus removal principles, synergistically exert their respective advantages, it is a kind of efficient, long-acting, stable and environment-friendly full solid waste water treatment material, it has important significance for promoting the green development of water treatment industry and reducing treatment cost.

The utility model discloses a decentralized domestic sewage treatment device resistant to low temperature and decomposition bacteria, which relates to the technical field of domestic sewage treatment, and comprises a tank body and a contact oxidation pond A. The left side of the tank body is provided with a water inlet, the left end in the tank body is provided with a separation area, the top of the tank body is provided with an access hole, and the access hole is communicated with the contact oxidation pond A; a first partition plate is installed in the tank body, the contact oxidation pond A is arranged on the right side of the first partition plate, efficient microorganism enrichment filler is installed in the contact oxidation pond A, and a second partition plate is arranged on the right side of the contact oxidation pond A. According to the low-temperature-resistant and decomposition-resistant strain distributed domestic sewage treatment device, the tank body can be buried below a frozen layer (also can be placed on the ground according to special requirements of a user), the ground surface above the buried integrated equipment can be used as a greening or other land, additional building of a house, heating and heat preservation are not needed, and under the condition that the water temperature is several DEG C in winter, the domestic sewage treatment device can be widely applied to the field of domestic sewage treatment. And the strain has good activity, cannot be frozen to death and can work well.