Nonwoven fabric rotating bio-disc reactor concurrently nitrifying anaerobic ammonia oxidation process

Abstract

The invention is a nonwoven fabrics biological turnplate reactor for simultaneous nitration anaerobic ammonia oxidation process, characterized in that it comprises plate, reaction vessel, aerator, temperatre controller, driver and transmission, where the reaction vessel is a closed device, the top end equipped with dissolved oxygen control hole, and the plate adopts nonwoven fabrics and is fixed by stainless steel plate frame. And its beneficial effects: the microbe adhesion is good, the substrate, gas and liquid mixing is uniform, the dissolved oxygen control is simple and convenient, easily achieving the required operation parameters for process operation, and the nonwoven fabrics have larger porosity (aperture is 3 micron), and rough surface, suitable for adhesion of slowly growing anaerobic ammonia oxidation bacteria, low manufacturing cost and lightweight. And it is applied to the simultaneous nitration anaerobic ammonia oxidation process, a novel biodenitrfying reactor.

Description

technical field [0001] The invention belongs to the technical field of water treatment equipment. Background technique [0002] With the increasingly stringent discharge standards, the removal of ammonia nitrogen in wastewater has attracted increasing attention. The traditional biological denitrification process of first nitrification and then denitrification has been widely used at home and abroad for wastewater denitrification process, such as A / O process, A2 / O process, etc., which can effectively remove nitrogen in wastewater. The basic principle is to first use nitrifying bacteria to convert ammonia nitrogen in wastewater into nitrite nitrogen and then oxidize it to nitrate nitrogen, then use denitrifying bacteria to convert nitrate nitrogen into nitrite nitrogen, and finally to nitrogen. However, these processes generally have shortcomings such as high infrastructure investment and operating costs, complex operation control, and high energy consumption, which do not me...

AI Technical Summary

Problems solved by technology

At present, the reactors operating the S.N.Anammox P. process at home and abroad mainly include: fixed-bed reactors, fluidized-bed reactors, sequencing batch reactors, and air-lift reactors, etc., but there are some problems in the operation of these reactors. Problems: For example, when the fluidized bed reactor is running, the film formation is uneven, the oxygen transfer rate of the fixed bed reactor and the sequencing batch reactor is poor, and the nitrogen generated by the air lift reactor makes the sludge particles float up and block the outlet pipe, etc.

The growth conditions of ANAMMOX bacteria are strict, and the optimal temperature required for growth and metabolism is 30-40°C. A temperature control device is required in the reactor. The ordinary biological turntable is only composed of a disc, a reaction pool, a driving device and a transmission device. The temperature parameters of the process cannot be adjusted according to the needs

Trace amounts of oxygen have a reversible inhibitory effect on ANAMMOX bacteria. In the first step of running the S.N.Anammox P. process - the pure culture of ANAMMOX bacteria requires a strict anaerobic environment. The reaction pool of an ordinary biological turntable is not airtight device, unable to perform anaerobic culture and anaerobic reaction

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