High-COD and high-ammonia nitrogen characteristic sewage bioreactor

Abstract

The invention provides a high-COD and high-ammonia nitrogen characteristic sewage bioreactor. The high-COD and high-ammonia nitrogen characteristic sewage bioreactor comprises a sewage treatment pool;the sewage treatment pool is characterized by being provided with a high-concentration active sludge layer S1, a medium-concentration sludge layer S2, a movable fluidization denitrifying layer S3, asolid and liquid separation layer S4 and a clarifying layer S5 sequentially from bottom to top according to the order of the oxygen content of wastewater from high to low; a carrier suitable for survival of biological denitrification bacteria is arranged in the movable fluidization denitrifying layer S3; and an aeration device is arranged at the lower end of the high-concentration active sludge layer. The reactor integrates an active sludge method, a biological membrane method and a settling pool (a clarifying pool), realizes aerobiotic, anoxic and anaerobic areas through dissolved oxygen decline curve principle and obstruction of the carrier biological membrane and is different from the pool separation arrangement of the traditional A/O process, aerobes and facultative microorganisms coexist in the depth direction of the sewage treatment pool, good stereoscopic functional partition is realized, the COD removal rate reaches to more than 90 percent, the NH3-N removal rate is more than 90 percent, and the system achieves a good COD and ammonia nitrogen removing effect.

Description

technical field [0001] The present application relates to the technical field of industrial wastewater or biological sewage treatment, in particular to a sewage bioreactor with high COD and high ammonia nitrogen characteristics. Background technique [0002] With the development of industry, the composition of sewage has become more and more complex. Some refractory organic substances and toxic substances need to be treated by microorganisms. Sewage has the conditions for microbial growth and reproduction, so microorganisms can obtain nutrients from sewage, and degrade and utilize harmful substances at the same time, thereby purifying sewage. Wastewater biological treatment is a treatment method that utilizes the life activities of microorganisms to degrade organic pollutants in a dissolved or colloidal state in wastewater, thereby purifying wastewater. [0003] Activated sludge method is a kind of wastewater biological treatment technology, which is the main method of wast...

AI Technical Summary

Problems solved by technology

In addition, due to the certain gradient of ammonia nitrogen concentration and total phosphorus concentration in the sewage treatment tank, the existing activated sludge method does not consider this concentration change, resulting in the removal rate of BOD5, total nitrogen and total phosphorus. It is difficult to achieve the ideal removal rate Require

At present, the A / O method is used for sewage treatment, and the anoxic and anaerobic areas need to be set up separately, which takes up a large space, and the efficiency of sewage treatment is not high

Images