Membrane up-flow aerobic bioreactor (MUAR)

Abstract

The invention discloses a membrane up-flow aerobic bioreactor (MUAR), which is used for increasing the oxygen charging efficiency of the reactor through ultrafine air bubbles to lower the running energy consumption of the reactor and belongs to the technical fields of environmental engineering and sewage treatment. In the reactor, water is fed in an up-flow way; an ultrafine air bubble generating device consisting of a jet aeration spray head, a decompression cabin and a polypropylene millipore filter pipe is used for generating ultrafine air bubbles (5-10 mum in diameter) which are fully mixed with inflow water from bottom to top; the upper part of the reactor is provided with a muddy water baffle plate for isolating sludge; and outflow water reflows and enters the ultrafine air bubble generating device. Due to a small specific surface area and collision and Brownian motion among molecules, the ultrafine air bubbles can be partially precipitated in water, so that higher oxygen transfer efficiency than that of ordinary air bubbles is achieved, and the ultrafine air bubbles are better combined with sludge at the bottom of the reactor. Compared with a reactor of the same type, the reactor disclosed by the invention has the advantages that: pollutants in bottom inflow water of the reactor can be degraded effectively, and the aim of reducing running cost is fulfilled finally.

Description

technical field [0001] An upflow aerobic bioreactor, the oxygen transfer efficiency is improved by mixing the ultrafine bubbles with the upflow water, and the sinking ultrafine bubbles can also fully contact the aerobic sludge at the bottom of the reactor to Improve its biological activity, so that it can fully degrade the organic pollutants in the influent. It belongs to the fields of environmental engineering and wastewater treatment. Background technique [0002] As the whole society pays more and more attention to environmental protection and pollution control, how to efficiently remove organic pollutants in wastewater to ensure the sustainability of national economic growth is imminent. As one of the measures to remove pollutants in water by using biochemical principles, aerobic biological treatment is widely used because of its rapidity and high efficiency. However, among the main factors affecting the aerobic biological treatment of wastewater, how to improve the ox...

AI Technical Summary

Problems solved by technology

However, due to the large size of the bubbles, the contact surface area with the water body is small, and because the large bubbles rise faster in the water, the residence time is too short, and thus the ideal dissolved oxygen effect cannot be achieved.

Images