Plate-frame immobilized cell membrane bioreactor and application thereof

Abstract

The invention discloses a plate-frame immobilized cell membrane bioreactor. The bioreactor is characterized in that cover plates are arranged on the outmost layers; the middle part is formed by successively arranging and assembling frames and flat-shaped immobilized cells; the frames include W frames and a C frame; the W frames represent the frames for the underground water to flow; the C frame represents the frame for the ethanol water to flow; the arrangement sequence of the cover plates, the frames and the flat-shaped immobilized cells is as follows: one cover plate, one W frame, one flat-shaped immobilized cell, the C frame, the other flat-shaped immobilized cell, the other W frame and the other cover plate; the lower and upper ends of the W frames and the C frame are respectively provided with inlets and outlets; and bolt holes are arranged around the cover plates and the frames. The bioreactor has the following advantages: the oxygen in the air is avoided from being dissolved in the underground water and ethanol water in the reactor, thus reducing the adverse effects of the dissolved oxygen on denitrification; at the same time, the effective reaction area of the immobilized cell in unit volume and the treatment capability in unit volume are obviously improved; and besides, recycling of the carbon source of denitrification is also realized, thus reducing waste of the carbon source of denitrification.

Description

Technical field [0001] The invention relates to the technical field of drinking water safety protection, in particular to a plate and frame type immobilized cell membrane bioreactor and its application in groundwater biological denitrification and denitrification technology. Background technique [0002] Groundwater is the main source of drinking water in many countries and regions. For example, more than half of the population in the United States uses groundwater as drinking water; 2 / 3 of the drinking water in the Netherlands comes from groundwater. my country's statistics on 21 provinces and cities and 27 major cities show that more than half of the cities use groundwater as their main water source. However, due to the unreasonable use of chemical fertilizers, sewage irrigation and sewage leakage, the concentration of nitrate in groundwater continues to rise. After being ingested into the human body, nitrate is reduced to nitrite in the stomach and intestines, which can conve...

AI Technical Summary

Problems solved by technology

That is to say, the increase of dissolved oxygen narrows the denitrification area of ​​membrane immobilized cells, therefore, the denitrification rate of this intermittent groundwater denitrification denitrification method is relatively slow, which is not conducive to the development of this groundwater denitrification denitrification method. Engineering applications, and the continuous dissolution of oxygen in the air into the ethanol aqueous solution will also promote the degradation of ethanol by microorganisms and increase the consumption of ethanol

In addition, the effective area of ​​membrane-like immobilized cells in the unit reactor volume of this intermittent groundwater denitrification and denitrification technology is relatively small. Compared with the general MBR, the reactor volume required to achieve the same treatment capacity will be much larger

If the structure of the reactor is not completely changed, it is difficult to increase the processing capacity per unit reactor volume

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