31results about How to "Reduce aeration costs" patented technology

A control system and method for digestion of waste activated sludge (“WAS”) includes treating the WAS first at anaerobic conditions for≤ a fixed period of time and then at aerobic conditions for≤a fixed period of time prior to either dewatering or optional anoxic conditions followed by dewatering, supplying air to initiate aerobic conditions when a predetermined set point for maximum ammonium nitrogen has been reached within the fixed anaerobic time, and initiating dewatering or optional anoxic conditions followed by dewatering when a predetermined set point for minimum ammonium nitrogen and optional standards for vector and pathogen reduction are met within the fixed aerobic time, the method and system including monitoring either consumption of soluble alkalinity or orthophosphate reduction or both for maximum orthophosphate reduction within aerobic time.

The invention discloses a high-efficiency intermittent aeration mechanism for industrial sewage treatment, which includes an aeration cylinder, a sealing plate, an annular clamping plate, an adjustment mechanism, a transmission mechanism and a connecting groove, and the center of the upper end surface of the transmission mechanism is fixedly connected There is an adjustment mechanism for sealing, and the transmission mechanism includes a spring rod, a gear shaft, a limit rod, a connecting plate, a gear groove, a clamping block, a sealing baffle, a clamping groove, a connecting chute and an air storage pipe. The side wall of the inner end face of the trachea is provided with a connecting chute for positioning. The present invention can improve the dissolution rate of oxygen in the air in the industrial sewage by increasing the muzzle velocity of the gas when it is aerated and discharged by setting the transmission mechanism, the regulating mechanism and the aeration cylinder, and at the same time can carry out the intermittent aeration of the cycle operation, reducing the power consumption of aeration and reducing the cost of sewage treatment in the factory.

The invention relates to a ceramic membrane chemical cleaning system and method which are used for cleaning a ceramic membrane in a water treatment system. The chemical cleaning system comprises an online cleaning part, wherein the online cleaning part comprises a dosing pump and a sucking pump; the dosing pump is coupled onto the ceramic membrane arranged in a membrane pool by virtue of a pipeline, so as to inject a cleaning liquid into the ceramic membrane; the sucking pump is coupled onto the ceramic membrane by virtue of a pipeline, so as to discharge water from a back absorption membrane of the ceramic membrane; and the cleaning liquid on the ceramic membrane is discharged into the membrane pool in a sucking process. The system and method which are provided by the invention can be used for solving the problems of pollution of the ceramic membrane in a water treatment process, production of secondary pollutants by the cleaning liquid in a membrane cleaning process, secondary treatment of the membrane cleaning liquid, and the like.

The invention provides a biofilm pretreatment device for polluted raw water purification. The reactor main body is provided with a water inlet pipe, an inlet water drainage area, a sediment sedimentation area, a dredge pipe, a separation net, a hung filler area, a suspension filler area, an elastic filler, a combined filler, a suspension filler, a suspended matter blocking screen, a splitter plate, a drainage plate, a treatment unit, a downstream diversion area, an aeration pipe, an elastic filler zone, an overflowing net and a water outlet pipe. Through combination of different types of fillers and distribution methods, a microbial biofilm attachment environment and microbial type diversity are improved. The biofilm pretreatment device is conducive to systematical, economic and effective removal of nitrogen and organic matters in raw water and reduction of turbidity of the raw water, breaks the limit of biological aeration tank carrier density close to that of water, solves the problem that the suspended biofilm carrier is not easily deposited on the bottom of the reactor and cannot fully perform cleaning effects, improves pollutant removal efficiency, effectively reduces an aeration cost and a running cost of the later raw water treatment process, and reduces a potential disinfection by-product generation risk.

The invention provides a step-feed multistage A / O-MBR processing method for oil shale retorting waste water, and comprises the following steps: (1) the oil shale retorting waste water is introduced with a step-feed multistage A / O-MBR processing system; the waste water is divided into three portions and enters into three anoxic pools respectively; (2) denitrification reactions are carried out in each anoxic pool; (3) waste water enter into each aerobic pool, and nitrosation reactions and nitrification reactions are carried out in each aerobic pool; (4) the waste water enters into a membrane bioreactor; (5) clear water generated after filtering by the membrane module is discharged, and a retained sludge mixed liquor returns to the first anoxic pool. According to the invention, oxygen-limited aeration is carried out in the first aerobic pool and the second aerobic pool, thereby realizing short distance nitrification; by means of step-feed, COD in the original water can be fully utilized for denitrification, thereby reducing external carbon source adding amount and mixed liquor reflux ratio, and reducing aeration cost and denitrification required carbon source.

The invention discloses an iron-and-manganese removing device based on microorganisms and a microorganism filtering method. The device comprises a first submersible pump, an aeration pool, a microorganism filtering device, a second submersible pump, a back washing pool, a clean water pool, a water storage box and an aeration device. The first submersible pump is arranged between the aeration pool and an underground well, the aeration pool is provided with the aeration device, the aeration device comprises an air compression pump and an aeration disc which are connected through an aeration pipe, and a lifting device is arranged at the upper end of the aeration disc; the aeration pool is sequentially connected with the microorganism filtering device, an outlet tee joint is arranged at the lower end of the microorganism filtering device and is respectively connected with the back washing pool and the clean water pool, and the second submersible pump is arranged between the back washing pool and the outlet tee joint; the microorganism filtering device comprises a top cover, a filtering column, a bottom cover and a transversely-moving cart, the top cover, the filtering column and the bottom cover are connected from top to bottom and are detachably connected, and the transversely-moving cart is used for supporting the filtering column; the water storage box is connected with an overflowing pipe at the upper portion of the filtering column.

The invention relates to a sewage treatment system and a sewage treatment method for reducing greenhouse gas emission. The system comprises a moving bed biomembrane biochemical reactor MBBR, an air stripping pool and an up-flow anaerobic sludge blanket UASB which are sequentially connected, wherein bio-filler is arranged in the MBBR, an aerating head is arranged at the bottom, an intercepting screen is arranged at an upper overflowing water outlet for preventing loss of the bio-filler, a mud outlet is formed at the bottom of the UASB, a sludge return opening is formed on the upper part, and a three-phase separator and an air outlet are formed on the top. Sewage enters into the MBBR for intermittent aeration, so that accumulation of NO<2-> is realized; effluent of the MBBR enters into the air stripping pool through a peristaltic pump to remove dissolved gas in water and then enters into the UASB; denitrifying anaerobic methane-oxidizing bacteria convert NO<2-> into N2 to be removed. According to the system provided by the invention, the UASB is coupled by using the MBBR, so that actual sewage with low carbon nitrogen ratio is treated in an energy-saving and efficient manner with less secondary pollution.

The invention discloses a wastewater treatment method, and specifically in particular relates to an upgrading treatment method for a sewage treatment plant in a park based on a membrane coagulation reactor-ozone-biological activated carbon technique. The method comprises the following steps: introducing wastewater of the park after pretreatment to an MCR (Membrane Chemical Reactor) system to befor treatinged, so that the turbidity of contributed water is less than or equal to 0.5NTU (Number of Transfer Units) and accords with some other indexes; then, oxidizing the contributed water of the MCR system in an O3 oxidizing system; introducing the contributed water of the O3 oxidizing system to a BAC (Basic Aluminum Chloride) system, and remaining the water treated in the BAC system for 1-5 hours; and thoroughly decomposing pollutants in wastewater through synergistic effect of activated carbon adsorption and micro-biological degradation, and so that the contributed water stably contributing water to meets the discharge demands. The method disclosed by the invention has the advantages that the operational stability of the system is improved; ozone tail gas is used for aeration of the BAC system, so that the tail gas treatment problem is solved; the aerating efficiency of the BAC system is improved; the system is in modular configuration, is automatically controlled and strong in maintainability.

The invention relates to a panel air lift circulation type photosynthetic microorganism culture device. A box is composed of a supporting part and a glass panel installed on the supporting part. Multiple reactor units sequentially connected in series are arranged in the box. Every two adjacent reactor units are separated through a connecting baffle installed on the supporting part. At least one aerating device is installed on the bottom in each reactor unit. One guide plate installed on the glass panel is arranged above each of the two ends of each aerating device. Each aerating device in each reactor unit communicates with a gas inlet tube. Gas enters the reactor units through each aerating device. A liquid outlet is formed in the bottom of each reactor unit. A glass cover plate provided with ventilation holes is connected to the top of the box in a sealed mode. A gap exists between each connecting baffle and the glass cover plate, and every two adjacent reactor units communicate with each other through the corresponding gap. The panel air lift circulation type photosynthetic microorganism culture device has the advantages that the cost is low, temperature control and cleaning are easy, energy consumption is low, photosynthetic efficiency is high, and the service life is long.