Integrated reactor and method for removing ammonia nitrogen in drinking water

Abstract

The invention relates to a reactor and method for removing ammonia nitrogen from drinking water. The integrated reactor for removing the ammonia nitrogen from the drinking water in microorganism nitration and ultrafiltration separation processes comprises a biological nitrification area unit and an ultrafiltration membrane filtration area unit, wherein the biological nitrification area unit and the ultrafiltration membrane filtration area unit are arranged in the same reaction pond. The method comprises the following steps of: removing ammonia nitrogen under the action of microorganisms growing on the surface of a biological filling and removing a part of small molecular organic matters; intercepting bacteria and microorganism membranes and the like under the filtering action of an ultrafiltration membrane to ensure the microorganism safety; providing nitrogen oxygen needed by the microorganisms by using an aeration device and scrubbing attachments on an ultrafiltration membrane filament under the air shearing action; and introducing large-density particles, falling microorganism membranes and the like into a sludge groove under the action of gravity, and discharging through a sludge discharging pipe. The reactor and the method can be used for treating drinking water of a water source which is polluted by ammonia nitrogen, and can be used for removing ammonia nitrogen from urban sewage and recycled water.

Description

technical field [0001] The invention relates to a purification method for drinking water, in particular to an integrated reactor for removing ammonia nitrogen in drinking water, and a method for strengthening the nitrification of microorganisms to remove ammonia nitrogen in drinking water. Background technique [0002] Drinking water sources in many cities in my country have persistent or seasonal ammonia nitrogen exceeding the standard. Conventional drinking water treatment processes, namely coagulation, sedimentation, filtration and disinfection processes, have almost no ability to remove ammonia nitrogen. On the other hand, the latest national drinking water standard (GB5749-2006) will be enforced in 2012. How to ensure that the ammonia nitrogen in the factory water reaches the standard is a problem faced by many water plants. [0003] The drinking water advanced treatment process using ozone / activated carbon and ozone / biologically activated carbon can better solve ammon...

AI Technical Summary

Problems solved by technology

However, this method still has the following defects: 1. The powdered activated carbon will inevitably be discharged during the sludge discharge process of the membrane tank. How to ensure the normal sludge discharge conditions of the membrane tank and ensure the sludge age of the powdered activated carbon on this premise, this It is difficult to effectively control the process operation, and the adaptability to the process operation of raw water with different turbidity is poor, and the management is complicated; 2. The cost of powdered activated carbon is high; 3. The particles of powdered activated carbon gather on the surface of the membrane, and on the negative side of the membrane. Under pressure and suction conditions, it may cause physical damage to the membrane surface and affect the life of the membrane filaments; 4. Once the membrane filaments in the membrane module are broken, the powdered activated carbon with microorganisms on the surface can easily penetrate the ultrafiltration barrier and may cause water supply accidents

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