36results about How to "Improve nitrogen removal rate" patented technology

The invention discloses a microorganism electrochemical denitrification method for enhancing the bio-hydrogen production, which belongs to the field of environmental engineering and energy and chemical industry. The method is characterized in that a microorganism electrochemical system is used as a reactor, and denitrification microorganisms are added into a cathode to realize the nitrogen removal by denitrification of a biological cathode. Meanwhile, by adding the hydrogen-production microorganisms in the biological cathode, the BES (knowledge based expert system) denitrification capacity is further improved by utilizing the biological hydrogen production. The denitrification microorganisms can directly utilize the hydrogen generated by the hydrogen-production microorganisms in the biological cathode to carry out the denitrification effect; meanwhile, organic acid generated in the biological hydrogen production process can play a role in buffering pH, so that the BES denitrification rate can be further increased.

The invention relates to a method for biologically purifying industrial circulating water. The method is characterized in that a biodegradation reactor is arranged in a circulating water system; nitrobacteria and denitrifiers are taken as inocula in the biodegradation reactor; at least part of the circulating water enters the biodegradation reactor to be biologically treated; the water from the biodegradation reactor enters the circulating water system; and the denitrifiers contain one or two of kocuriapalustris FSDN-A, arthrobactercreatinolyticus FDN-1 and flavobacteriummizutaii FDN-2. Compared with the prior art, the method has the advantages that the biological treatment method is adopted to treat the nutrient sources needed by microorganisms before the circulating water enters the device, so that the microorganisms brought in by the circulating water in the circulating process are difficult to survive, and then growth and reproduction of the microorganisms in the circulating water system are controlled.

The invention provides an autotrophic denitrification deep denitrification device, which belongs to the technical field of waste water deep denitrification. The device includes a regulating tank, a reactor, and a sedimentation tank. A mud discharge area is provided at the bottom of the reactor, and a water distribution pipe is provided above the mud discharge area. There is a filter screen between the mud discharge area and the water distribution pipe. The water distribution pipe There is a reaction zone above the reaction zone, and a gas collection zone above the reaction zone. The device constructs an autotrophic denitrification biological filter bed, and optimizes the type and ratio of fillers in the reaction zone. The invention also discloses an autotrophic denitrification deep denitrification method. The method optimizes the operation mode and operating conditions, improves the biological activity and denitrification ability of the autotrophic denitrification bacteria in the system, thereby reducing the start-up time and enhancing the denitrification capacity. The denitrification effect of the system is improved, and it has the characteristics of low energy consumption, fast response, and no secondary pollution. It solves the problems of long start-up time, high sulfate concentration in effluent, Easy to block, easy to flow out of sulfur and other problems.

The invention relates to a treatment method for ammonia-containing wastewater, which comprises using activated sludge as a carrier, adding a growth promoter M under the condition that MLSS is 1000-2000 mg / L, and controlling DO to be 2.0-4.0 mg / L; When the removal rate of ammonia nitrogen reaches 50% to 70%, add denitrification microbial inoculants and growth promoter N to reduce DO to 1.0 to 2.0 mg / L; when the removal rate of ammonia nitrogen reaches more than 80%, reduce DO to 0.1 to 1.0 mg / L ; the growth promoter M comprises at least one of trehalolipid, sophorolipid and rhamnolipid; the growth promoter N comprises glycolipid, sugar alcohol and organic acid salt. By adding specific denitrifying bacteria agents and different growth promoters into the wastewater treatment system, and combining with the control of dissolved oxygen concentration, the present invention can not only realize the efficient removal of ammonia nitrogen and total nitrogen in the same reactor, but also can remove the nitrogen in the wastewater. Refractory organic pollutants, improve effluent quality.

The invention relates to the technical field of wastewater treatment, and discloses a pharmaceutical wastewater treatment process which comprises steps: preforming wastewater pre-treatment and comprehensive treatment, pumping wastewater into a coagulation gas floatation clarifier, adding polyaluminum chloride and polyacrylamide in a water input pipeline through a coagulation medicine adding system, then enabling mixed wastewater to enter a three-phase catalytic oxidation tower, a coagulative precipitation tank, a pre-acidification pool, a thermoregulation pool, a UASB reaction pool and a combined type hydrolysis acidification pool sequentially, subjecting the mixed wastewater to hydrolysis acidification, enabling the wastewater to enter a primary A / O pool, a primary precipitation pool, a secondary A / O pool, a secondary precipitation pool, a Fenton oxidation pool and a tertiary precipitation pool sequentially, and discharging standard outlet water from a standard discharging opening. The process has the advantages of stable running effect, high ammonium-nitrogen removal rate, and low running cost, thereby being suitable for treatment of wastewater, which is refractory to degrade, in the pharmaceutical industry.

The invention discloses an aerobic synchronous nitrification and denitrification biofilm method for treating nitrogen-polluted water bodies: the synchronous nitrification and denitrification biofilm is obtained by preparing a biofilm carrier; wherein the biofilm carrier is 70-80% degradable fiber carrier and 20~30% modified mussel shells. The beneficial effects are: based on the property of slow-release carbon source of the solid-phase carrier, the control ability of the carbon source is good, the physical and chemical adsorption capacity is good, the speed of film formation is fast, and the specific surface area of ​​the formed biofilm is large. The formed gel-like biofilm gradually forms a dissolved oxygen gradient from the surface to the interior, the surface is in an aerobic state, the middle is facultative, and the interior is anaerobic, forming a relatively independent aerobic-facultative-anaerobic state. Oxygen unit, that is, countless A2O units are formed in the overall aerobic environment inside the BAF to realize heterotrophic simultaneous nitrification and denitrification.

The invention discloses a method for deeply processing chloropropylene oxide waste water. The method comprises the following steps: introducing excess CO2 gas in partial cooled to-be-treated original waste water, rapidly mixing the waste water and partial original waste water so that the temperature of the mixed waste water is greater than 60 DEG C, removing calcium ion precipitate; adding ammonium sulfate in an effluent for precipitating to remove the calcium ions, performing biochemical treatment with the precipitates together; and adding a microbe growth promoter during a biochemical treatment process, wherein the promoter comprises metal salt and a polyamines substance, the metal salt is 40-100 weight parts, the polyamines substance is 5-30 weight parts, and the metal salt is composed of calcium salt, the copper salt, the magnesium salt and / or ferrous salt. By introducing excess CO2 and using original waste water alkalinity and waste heat, most calcium ions can be removed through precipitating, then ammonium sulfate is added for removing calcium, the waste water deep processing is realized by adding the microbe growth promoter, and the method has the characteristics of simple treatment process, high processing efficiency, and low cost.

The invention discloses a quick starting method of short-cut nitrification and denitrification of a wastewater treatment system. The method includes the following steps: (1) inoculating aerobic active sludge into a reactor and adding a growth accelerator A; (2) starting the system firstly in an intermittent water feeding manner and then in a continuous water feeding manner; (3) during intermittent operation, when concentration of suspensions in discharged water is lower than 100 mg / L, stopping addition of the growth accelerator A and adding denitrifying bacterial agent and a growth accelerator B; (4) when the ammonia nitrogen in inlet water reaches 400-700 mg / L and removal rate reaches more than 60% within 12 h, changing the operation into continuous water feeding, and adding the denitrifying bacterial agent and the growth accelerator B; and (5) when removal rate of total nitrogen reaches more than 70%, increasing the concentration of ammonia nitrogen until the ammonia nitrogen in inlet water reaches 500-1000 mg / L and the removal rate of total nitrogen reaches more than 80%, and at this time, completing the starting process. The method greatly reduces starting difficulty of short-cut nitrification and significantly reduces operation time, and ensures long-time stable operation of the reactor. The method has high treatment efficiency on wastewater, and can achieve simultaneous removal of ammonia nitrogen, total nitrogen and COD.