50results about How to "Increase nitrification" patented technology

The invention provides reinforced simultaneous nitrogen and phosphorus removal sewage treatment equipment and a method for municipal sewage with a low carbon source at low oxygen concentration. The equipment is composed of an SBR main reaction tank and two dephosphorizing tanks, wherein, the water inlet pipe of the SBR main reaction tank is led in from the upper part of the reaction tank, the water outlet pipe thereof is led out from the lower part of the reaction tank, and an external circulation sludge pipe is led out from the bottom of the SBR main reaction tank; the SBR main reaction tank is equipped with an aerating apparatus; and the SBR main reaction tank adopts an operation mode of water inflow in batches, and anaerobic-aerobic/anoxic alternation and sedimentation and drainage. The two dephosphorizing tanks have identical structure size and are respectively taken as an anaerobic phosphorus release tank and a chemical dephosphorizing tank in the same cycle for sewage treatment, and functions of the two tanks are exchanged in the next cycle. The invention can well realize reinforced simultaneous nitrogen and phosphorus removal treatment for the municipal sewage with a low carbon source under a low dissolved oxygen environment.

The invention relates to a method for processing reverse osmosis concentrated water by a catalyzed internal electrolysis and modified biological aerated filter. The method comprises the following steps: 1) performing catalyzed internal electrolysis pre-processing: regulating a pH value of wastewater, and removing organic substances in concentrated water through iron-carbon internal electrolysis reaction; 2) performing two-stage biological filter biological membrane processing: after performing coagulating sedimentation on catalyzed internal electrolysis outlet water, introducing the catalyzed internal electrolysis outlet water into a two-stage biological filter (a denitrification biological filter and an aeration biological filter) to further remove organic substances and ammonia nitrogen in the concentrated water. The method is high in processing efficiency, low in operation cost and capable of effectively removing organic substances which have toxic action to human health and an ecological environment in the concentrated water and improving wastewater biodegradability; the improved aeration biological filter can be suitable for characteristics of high hardness, high alkalinity, high sulfate and the like of the RO concentrated water, so that the water quality of the outlet water meets emission needs and a novel way for processing the reverse osmosis concentrated water is provided.

The invention provides a method for treating chitin waste water, wherein the method comprises the following steps of: (1) conveying soda boiling water and pickling waste water into a first-level coagulation tank for first-level coagulation sedimentation; (2) conveying yielding water of the step (1) and washing waste water into a regulating tank; (3) conveying the yielding water in the regulating tank into a second-level coagulation air floatation tank; (4) conveying the yielding water of the step (3) into an up-flow anaerobic sludge blanket; (5) conveying the yielding water of the step (4) into a hydrolysis acidification tank, and carrying out hydrolysis acidification; (6) conveying the yielding water in the hydrolysis acidification tank into a contact oxidization tank; (7) carrying out partial reflux of the yielding water in the contact oxidization tank to the hydrolysis acidification tank; and (8) conveying the residual yielding water in the contact oxidization tank into a three-level coagulation sedimentation tank for coagulation sedimentation, and discharging the obtained clean water. According to the invention, the waster water in the production of chitin is treated comprehensively, the treating expense is lowered, and the yielding water is superior to the first level discharge standard stipulated by Integrated Waste Water Discharge Standard of People's Republic of China (GB8978-1996).

The invention belongs to the technical field of wastewater treatment, in particular to amethod for treating industrial wastewater containing hexamethylenediamine by sequentially carrying out anaerobic biological treatment, hypoxia treatment, aerobic treatment and drainage to wastewater. The invention has simple process, low operation cost and good wastewater treatment effect, can stably reach the emission standard of chemical industrial wastewater containing the hexamethylenediamine so that various indexes of dischage water stably reach or exceed the A-catalog indexes of national first-order discharge water.

The invention relates to a method for restoring a eutrophic tidal flat sediment habitat. The method comprises the following steps of: preparing bacteria solution; preparing stationary liquid; uniformly mixing and gelling the bacteria solution and the stationary liquid; preparing CaC12 solution; fixedly granulating the gelled bacteria solution; collecting and preserving; carrying out combined operation of plowing and environmental restoration bacteria immobilized particles; arranging shellfishes and clam worms; and regularly monitoring. The method disclosed by the invention is capable of effectively protecting bacterial strains and has the buffer function in an environment that physical and chemical factors are more severe; an effective vector can be provided for the bacterial strains, so that the bacterial strains have the bacteria restoration function effectively for a long time; by means of bioturbation of the shellfishes and the clam worms, the nitration and denitrification effects of sediments can also be effectively increased; and in addition, by means of combined use of the above methods, the method has good environment-friendly value and market application prospect to environmental restoration.

The invention discloses a method for treating high ammonia-nitrogen wastewater through a multipoint dispersed water injection three-stage compound A/O (Anoxic/Oxic) process and belongs to the field of environment friendliness. The method comprises the following steps: pretreating the high ammonia-nitrogen wastewater, and enabling the wastewater to enter a regulating reservoir; enabling the effluent to enter a biological treatment system, wherein the biological treatment system comprises an A/O reactor in three-stage series operation; respectively injecting water into a primary A/O reactor, a secondary A/O reactor and a three-stage A/O reactor in a dispersed manner according to a ratio, wherein the reactor is jointly built by an anoxic area and an oxic area with the same volume; the inlet water is in a multipoint dispersed injection manner; the inlet water in the primary A/O reactor, the secondary A/O reactor and the three-stage A/O reactor is respectively 30-40%, 20-30% and 10-20% of the total water amount of the inlet water; and the water inlet position is the anoxic area of the three-stage A/O reactor; and enabling the treated wastewater to freely flow out from the top of a secondary sedimentation tank, periodically discharging the sludge, and enabling the sludge to enter the primary A/O reactor through a sludge return pump. The method disclosed by the invention has excellent popularization prospects on treatment of coking plant wastewater.

The invention relates to a biological denitrification treatment method for dimethylamine wastewater. The biological denitrification treatment method comprises the following steps: 1, conveying dimethylamine wastewater to an adjusting tank, and adjusting the pH value; 2, conveying the dimethylamine wastewater subjected to pH adjustment into an ammoniation tank containing obligate ammoniation bacteria, and carrying out ammoniation treatment; 3, carrying out nitrification treatment; 4, carrying out denitrification nitrogen removal treatment; and 5, refluxing the wastewater subjected to denitrification treatment to the ammoniation tank, and repeating the operations in the steps 2-4 until the ammonia nitrogen content and the total nitrogen content in the wastewater meet the requirements, wherein the obligate ammoniation bacteria are obtained by performing sequencing batch enrichment culture on ammoniation bacteria in activated sludge by utilizing a culture solution, and bioactive fillers are arranged in the nitrification tank and the denitrification tank. According to the invention, the obligate ammoniation bacteria cultured by the invention can efficiently convert dimethylamine into inorganic ammonia nitrogen, so that the most core link of dimethylamine biological denitrification is solved; and bioactive fillers are introduced in nitrification and denitrification processes, so thatthe nitrification and denitrification efficiency is improved.

The invention discloses an IOT (Internet of Things)-based biochemical flocculation and adsorption sewage treatment control system. The IOT-based biochemical flocculation and adsorption sewage treatment control system comprises a filter device, a treating pond device, an aeration device, a flow division control device, a detecting device and a stirring device. A flocculating agent is added in sewage, and the sewage in whichthe flocculating agent is added can be filtered through the filter device; a baffle plate net frame, an aggregate layer and a filter net are arranged in a mesoporous filter,a filter and adsorption device is used for adsorbing and removing heavy metal pollutants in the sewage, and then disinfection treatment can be carried out on the sewage, so that the water quality canbe effectively purified, nitrification and denitrification abilities of a water body are increased through aeration, a denitrifying effect of a system is greatly improved, and a set of efficient and quick riverway water body in-situ remediation technology is formed; microorganism on a biological carrier is capable of further degrading the pollutants in the water body, so that the water quality isincreased; the treated sewage can be monitored, and the treated sewage can be conveyed to water use units after meeting the water use standard.

The invention discloses a nitrogen-removing biological filter device and application thereof in treatment of micro-polluted source water. The nitrogen-removing biological filter device comprises an upward flow filter column, a water inlet slot, a water inlet tube, a water outlet tube and an outlet water collector, wherein a supporting plate and a biological filter material layer are arranged in the upward flow filter column from bottom to top in sequence; the lower end of the upward flow filter column is connected with the water inlet slot by the water inlet tube; the water inlet tube is arranged below the supporting plate; the upper end of the upward flow filter column is connected with the outlet water collector by the water outlet tube; the water outlet tube is arranged above the biological filter material layer; the water inlet tube is connected with a constant-flow pump. The nitrogen-removing biological filter device disclosed by the invention can realize synchronous nitrification and denitrification without the need of aeration in an ammonia nitrogen degrading process, so that the ammonia nitrogen is finally converted into a nitrogen gas, and therefore, while energy resources are greatly saved, outlet water quality indexes of the ammonia nitrogen reach standards, and total nitrogen is removed very well.

The invention discloses a denitrifying-based phosphorus and nitrogen removal process for a sequencing batch type two-sludge system, belongs to the technical field of biological treatment of wastewater and is particularly suitable for phosphorus and nitrogen removal treatment of low-carbon source wastewater. The denitrifying-based phosphorus and nitrogen removal process comprises a water inlet and outlet as well as aeration step, a double-precipitation step, a circulation step, a mixing step as well as a precipitation and aeration step; and the water inlet and outlet as well as aeration step, the double-precipitation step, the circulation step, the mixing and aeration step as well as the precipitation and aeration step are carried out in sequence repeatedly according to an operating period. With the adoption of the denitrifying-based phosphorus and nitrogen removal process, as limited carbon sources are fully utilized for denitrifying-based phosphorus removal, the aeration rate is reduced, the utilization ratio of the carbon sources in the wastewater treatment is increased, and the problems of insufficient carbon sources and high aeration energy consumption in the biological phosphorus removal of wastewater are effectively solved; and the denitrifying-based phosphorus and nitrogen removal process has the advantages of saving in the aeration rate, need few carbon sources, low construction and running costs, small occupied area and the like.

The invention discloses an anaerobic and aerobic multistage-wetland sewage treatment device and belongs to the technical field of water purification. The sewage treatment device consists of a grille well, an anaerobic contact tank, an aerobic wetland tank, an anaerobic wetland tank and an effluent well. Composition products of the sewage treatment device are of series connection and comprise the grille well, the anaerobic contact tank, the aerobic wetland tank, the anaerobic wetland tank and the effluent well sequentially from front to back. The grille well can be used for intercepting entrained thick and big foreign bodies from sewage, the anaerobic contact tank is used for lowering the concentration of organic matters in the sewage and decomposing macromolecular organic matters in the sewage into micromolecular organic matters, and plants of the aerobic wetland tank and the anaerobic wetland tank are used for absorbing water nutrients and degrading the organic matters in the sewage. Due to aerobic wetland treatment, nitration and denitration actions can be strengthened, and aquatic plants are used for decomposing and absorbing the organic matters in the sewage so as to construct a good ecological environment; long-term usage is achieved by one-time investment, the maintenance is easy, the sewage treatment effect is good, and the applicable range is extensive.

The invention discloses a microbial compound nitrogen fertilizer, comprising the following components in percentage by weight: 0.01-20% of immobilized nitrobacteria, 0.01-20% of mycorrhizal fungi enrichment liquid, 0.1-50% of clay filler and balance of urea. The microbial compound fertilizer provided by the invention is added with the immobilized nitrobacteria, mycorrhizal fungi enrichment liquid and clay filler, which can be applied with urea at the same time into the soil to accelerate nitration of urea, thereby avoiding the volatilization loss of ammonia realized by urea hydrolysis and improving the utilization ratio of nitrogen in the nitrogen fertilizer; and meanwhile, the fertilizer is also inoculated with exogenous mycorrhizal fungi to promote the infection rate of mycorrhizal fungi to crops, improve the phosphorous absorption of the crops, benefit the expansion of roots, and further increase the nitrogen adsorption. By the cooperation of the two aspects above, the microbial compound nitrogen fertilizer can improve the utilization rate of nitrogen fertilizer, and can be applied to crops in the drought environment, especially for base fertilizer for culturing winter wheat.

The invention discloses an enhanced nitrogen and phosphorus removal and resource recycling type constructed wetland system. The constructed wetland system comprises a constructed wetland pool, a water distribution system, an aeration system, a ventilation observation well, a nitrogen and phosphorus removal matrix located in the constructed wetland pool and a liquid level control system, wherein wetland plants are planted in the nitrogen and phosphorus removal matrix. The constructed wetland system provided by the invention has the characteristics of high water quality purification capacity, low capital construction cost, convenience in operation and maintenance, good landscape effect and the like, and can meet the requirements of garbage recycling and resource saving.

The invention relates to a method for treating high-solid-content organic wastewater by anaerobic-aerobic deep coupling. The method comprises the following steps: crushing and screening organic wastes, adding a slurry liquid obtained by filtration into an anaerobic reaction unit, and carrying out anaerobic fermentation to obtain biogas and biogas slurry; introducing anaerobic outlet water into a solid-liquid separation unit for solid-liquid separation, and enabling separated biogas residues to return into the anaerobic reaction unit through a sludge backflow pump; enabling separated biogas slurry to enter an aerobic reaction unit, and removing nitrogen through a synchronous nitrification and denitrification process; and enabling part of outlet water of the aerobic reaction unit to flow back to the anaerobic reaction unit and undergo full dilution and mixing with organic waste raw slurry liquid for an anaerobic reaction, and enabling the other part of the outlet water to enter a next treatment process or be discharged after reaching the standard. According to the method, the anaerobic outlet water enters the solid-liquid separation unit, suspended solids are separated out, outlet water enters the aerobic reaction unit, the DO value in the water body of the aerobic reaction unit is well controlled, denitrification is completed, then a backflow ratio of aerobic outlet water is controlled and part of the aerobic outlet water returns to the anaerobic reaction unit again, the reaction is circulated, the anaerobic biogas production rate is increased, and meanwhile the water quality of the aerobic outlet water is higher.