CAST sectional water inlet synchronous denitrification and dephosphorization strenghthening procedure control device and method
A technology for simultaneous nitrogen and phosphorus removal and process control, which is applied in the field of CAST staged water synchronous nitrogen and phosphorus removal and enhanced process control devices, can solve the problems of high nutrient removal rate and limitations, and reduce the impact and improve performance. , The effect of solving the improvement of operating costs
Active Publication Date: 2009-05-20
JIANGSU YULONG ENVIRONMENTAL PROTECTION
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In addition, the contradiction between the requirements of phosphorus removal and nitrogen removal in terms of sludge age also leads to the incompatibility of high removal rates of the two nutrients, which limits the application of this process
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[0051] The actual domestic sewage discharged from a family area of a university was used as the experimental object (pH=6.5~7.8, COD=260~350mg / L, TN=60~85mg / L, TP=3.5~10.5mg / L). The selected CAST reactor has an effective volume of 72L, the initial MLSS in the reactor is 3.5-4.0g / L, and the aeration rate is constant at 0.8m 3 / h, the mud age is maintained at about 10d, and the reaction temperature is 23°C. Utilize CAST segmented water inlet to strengthen denitrification and phosphorus removal technology and its process control device, the treated water volume is 24L, and the number of segments is 3 times. The final effluent COD is less than 50mg / L, total nitrogen is less than 10mg / L, and total phosphorus is less than 0.5mg / L , which is lower than the concentration required by the national first-level emission standards.
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The invention relates to a control device and a method of a CAST segmental inflow and synchronous denitrification and dephosphorization reinforcement process, which belongs to the technical field of SBR and variant process spent water biological denitrification. The denitrification and dephosphorization effect of the currently used CAST technique is not desirable. The device comprises a selector, a main reaction zone, an inlet pump, a stirrer, a diving stirrer, a return sludge pump, an aerator, an air compressor, a decant machine, a drain valve, a mud valve, a real-time controlling system and a sensor. The real-time controlling system is used for controlling a time-delay device which is connected with the inlet pump, the stirrer, the diving stirrer, the return sludge pump, the air compressor, the decant machine, the drain valve and the mud valve, a computer, and a data collecting card connected on the computer. By the processes of inflow anoxia stirring, inflow anaerobism stirring, aeration, sedimentation, drainage and leaving unused, the synchronous denitrification and dephosphorization is realized. The device and the method have the advantages of good denitrification and dephosphorization effect, low operation cost, and being capable of realizing intelligent control, and the like.
Description
technical field [0001] The invention belongs to the technical field of SBR (Sequenced Batch Activated Sludge Process) and its variant process sewage biological denitrification, and specifically relates to a CAST (Circulating Activated Sludge Process) suitable for nitrogen-containing industrial wastewater treatment and urban sewage advanced treatment A step-by-step synchronous denitrification and dephosphorization intensified process control device and method. Background technique [0002] The problem of eutrophication is one of the most important water pollution problems faced by countries all over the world. Although the treatment rate of urban sewage in my country has been continuously improved in recent years, the problem of eutrophication caused by nitrogen and phosphorus pollution has not been fundamentally solved. There is even a growing trend. my country's large freshwater lakes and coastal waters are moderately or severely polluted with eutrophication. In the newly ...
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IPC IPC(8): C02F3/30
Inventor 彭永臻马娟王丽刘洋马宁平
Owner JIANGSU YULONG ENVIRONMENTAL PROTECTION
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