36results about How to "Increase nitrification rate" patented technology

The invention discloses a coupling filler autotrophic denitrification biofilter and application and belongs to the technical field of sewage treatment. Pyrrhotite, sulfur and a carbon source are utilized to be mixed and coupled according to certain proportion; then the materials are put into a reactor, and the autotrophic denitrification biofilter can be formed after inoculating biofilm formation;sewage flows through the biofilter, and nitrogen and phosphorus in the water are removed. The biofilter disclosed by the invention has the advantages of simpleness, easiness, practicability and shortbiofilm formation time; when the biofilter is utilized to treat nitrogen and phosphorus containing sewage, hydraulic retention time is only 0.5 to 3 h, and yielding water can meet a requirement; furthermore, the biofilter has the advantages of excellent nitrogen and phosphorus removal effect, low cost and suitability for engineering application.

The present invention discloses a real-time control apparatus for a floated aerobic biofilm A<2>O system for treating low C / N sewage, and a method thereof. The real-time control apparatus for the floated aerobic biofilm A<2>O system comprises a raw water tank (1), an aerobic biofilm A<2>O reactor (2), a secondary settling tank (3), a DO meter (5), a on-line tester (6), a computer (7) and a process controller (8). The real-time control method comprises: online collecting ammonia nitrogen concentration in a effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of an air pump; online collecting nitrate nitrogen concentration in the effluent tank, wherein the real-time control system is adopted to adjust the reflux ratio of the nitrified liquid of a peristaltic pump; online collecting the PO4<3->-P concentration in the effluent tank, wherein the real-time control system is adopted to adjust a bypass flow ratio of the peristaltic pump; online collecting the TOC concentration in the effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of the air pump. The method provided by the present invention is one of the most effective methods for treating the low C / N sewage and synchronously denitriding and removing phosphorus. The effluent quality through the apparatus and the method provided by the present invention stably achieve the national one-level (A) standard.

The present invention provides a two-stage biological selection denitrifying phosphorus and nitrogen removal sewage treatment device and a method thereof, relates to a device and a method for sewage treatment, and aims to solve the problem that inner contradiction existing in anaerobic, anoxic, aerobic and other phosphorus and nitrogen removal processes of a sewage treatment plant cannot meet the requirements of 'Discharge standard of pollutants for municipal wastewater treatment plant' (GB 18918-2002) in China. The device adopts a technical scheme that: a second anaerobic biological selector is communicated with a sedimentation tank; and a first anaerobic biological selector is communicated with an anoxic pond. The technical scheme of the method comprises the following steps: 1, pumping raw water into the first anaerobic biological selector; 2, allowing effluent treated by the step 1 to enter the second anaerobic biological selector; 3, allowing the effluent treated by the step 2 to flow to the anoxic pond; 4, allowing the effluent treated by the step 3 to enter a first aerobic pond; 5, allowing the effluent treated by the step 4 to enter a second aerobic pond; and 6, allowing the effluent treated by the step 5 to enter the sedimentation tank, and directly discharging supernatant. The device and the method are used for municipal sewage treatment.

The invention discloses a double sludge oxidation ditch denitrification phosphate-removing apparatus and a method thereof. The apparatus comprises an oxidation ditch; an anaerobic zone, an anoxic zone and a water outlet zone which are communicated in order are arranged in the oxidation ditch, an independent nitrification zone is arranged between the anaerobic zone and the anoxic zone along the sewage flowing direction, a pre-anaerobic zone is arranged between the anoxic zone and the anaerobic zone, the independent nitrification zone is separated with the anaerobic zone and the anoxic zone through a first baffle plate and a second baffle plate, a first mud-separation zone, a filling material zone, a second mud-separation zone and a current stabilization zone are arranged in order along the sewage flowing direction, and nitrobacteria is enriched in the filling material zone. The denitrification phosphate-removing method is characterized in that a main channel of the oxidation ditch is always in an anaerobic / anoxic state, so that the denitrifying phosphorus-removing bacteria can be a dominant bacteria, the filling material is employed for hanging a membrane in the independent nitrification zone, so that a stable living environment is provided for nitrobacteria, nitrobacteria biomass in the independent nitrification zone is increased, nitrification rate is increased, and denitrification phosphate-removing effect can be guaranteed.

The invention belongs to the field of microbial fermentation, and in particular relates to a high-density enrichment method of an autotrophic nitrifying bacteria consortium and the application of the obtained high-density autotrophic nitrifying bacteria consortium to sewage treatment. The bacteria were inoculated in the initial culture medium of autotrophic nitrifying bacteria, at 28°C-32°C, pH 7.5-8.0, dissolved oxygen (DO) controlled at 20%-40%, cultured under agitation conditions, the NO 3 The relationship between ‑N accumulation and the consumption of inorganic carbon sources, the change of pH value during the cultivation process is monitored by pH electrodes, and the addition of inorganic nitrogen sources and inorganic carbon sources to the cultivation system is realized, so that the concentration of ammonia nitrogen is controlled at 150‑ during the cultivation process 300mg / L, and the pH of the system is kept at 7.5-8.0 by adding carbon sources, so as to realize the high-density automatic expansion of autotrophic nitrifying bacteria consortia. The invention effectively solves the problem of poor ammonia nitrogen treatment effect caused by such consortia in the application process of ammonia nitrogen wastewater treatment due to poor strain adaptability, loss of added strains, insufficient number of added strains and high cost.

The invention discloses a SBR alternant aerobic / anaerobic technology for biological denitrification and real time control device and method thereof which consists of, dividing the waste water to be treated into three portions, loading each portion into a reactor, alternatively carrying out the operating mode of aerobic aeration and anoxybiotic agitating under real time procedure control, so as to realize the organics degradation and nitrogen-containing compound removal.

The invention belongs to the technical field of biology and water treatment, and provides a preparation method and application of a semi-dry state nitrifying bacterial agent. (2) After enrichment culture, carry out domestication culture to obtain a culture solution with high nitrification activity; (3) Concentrate the culture solution and place it at a certain concentration (4) Mix (3) the mixed solution with the treated carrier to obtain a bacterial agent; (5) put the bacterial agent into a vacuum-sealed bag, vacuum seal, and place it in a cool place Store at room temperature. The bacterial agent only needs to be dispersed with water, and then added to the aerobic biochemical system. It has the characteristics of high activity, high tolerance, good stability, strong resistance to stress, etc., and is convenient for transportation and storage. , small footprint and other advantages; no activation and rejuvenation are required during application.

A continuous flow operation method for prompting a continuous flow sewage treatment system to achieve short range nitration quickly belongs to the field of sewage treatment by using a biochemical process. According to the invention, by using the characteristics that the activity of nitrite oxidizing bacteria is restrained under an anoxic condition and is slow in recuperate under an aerobic condition, a continuous flow system is modified to be a four-section anoxic-aerobic alternating operation way, and the nitrite accumulation rate is improved stage by stage; the nitrite oxidizing bacteria in the system can be washed through a spoil disposal way, and a stable short range nitration effect is eventually achieved. Practice shows that the nitrite accumulation rate can reach more than 80 percent in about one sludge age after the system is started. Compared with a short range nitrifying method for achieving a continuous flow system by depending on dissolved oxygen, the continuous flow operation method provided by the invention has the advantages of short period, relatively stable short range effect, high nitration rate, capacity of low possibility of sludge expansion and the like, can serve as a quick starting method aiming at short range nitration of the continuous flow system, and is applicable to continuous flow sewage treatment systems with various scales.

The invention discloses a wastewater biochemical treatment method, and specifically discloses a method for treating PVC (Polyvinyl Chloride) mother liquor by utilizing MBR (Membrane Bioreactor) technique. The method comprises the following sequential process schemes: carrying out anaerobic reaction treatment on the PVC mother liquor with PVA (Polyvinyl Alcohol)-containing degrading bacteria, wherein the anaerobic reaction temperature is controlled at 20-35 DEG C, the reaction time is controlled at 6-10h, and the dissolved oxygen is controlled at 0.1-0.2mg / L; degrading organic macromolecules into micromolecules so as to improve biodegradability; and then introducing anaerobic reaction effluent to the MBR for aerobic treatment so as to ultimately obtain clean water with COD (Chemical Oxygen Demand) not more than 30mg / L, wherein bacilli is contained in the MBR. The method has the advantages that treatment cost is only needed to be invested at one time, and long-term and stable treatment can be realized by expending low maintenance cost and electric cost in the following years; the longer the use time is, the lower the average treatment cost of per ton of wastewater is; and the method can be widely applied to sewage treatment enterprises.