Oxygen supply device for space wastewater treatment

Abstract

The invention discloses an oxygen supply device for space wastewater treatment. The device is connected serially in a wastewater treating fluid circulation loop. The oxygen supply device mainly comprises an oxygen supply membrane module, a pressure sensor, an electromagnetic valve, a flowmeter, a relief valve and an oxygen storage bottle. Membrane yarns in the oxygen supply membrane module are prepared from a hydrophobic polyvinylidene fluoride (PVDF) material with high oxygen permeability; and the two ends of each membrane yarn are encapsulated at both ends of the shell of the oxygen supply membrane module by virtue of epoxy resin in bundles. Oxygen passes through micropores on the wall of a membrane pipe from the outside of the membrane yarns at a certain pressure and enters the wastewater treating fluid flowing through the membrane pipe so as to be absorbed and utilized by microorganisms. The oxygen supply mode is determined by the dissolved oxygen (DO) of the wastewater treating fluid and the gas presssure of the oxygen supply membrane module. The oxygen supply device is suitable for equipment used for treating wastewater with microorganisms under a future space condition and can also provide a new technical means for basic researches such as the research on the ground wastewater microorganism treatment characteristic.

Description

Technical field [0001] The invention belongs to the research field of long-term manned aerospace environmental control and life protection technology, and particularly relates to an oxygen supply device used for microbial treatment of wastewater under space microgravity conditions. Background technique [0002] Long-term, long-distance and multi-occupant space flight is the development situation of manned spaceflight in the future. The use of biotechnology to simulate the principles of natural ecology to establish a biological regenerative life support system outside the ground, so as to realize the continuous supply of occupant life support materials in situ, is currently a research hotspot in major aerospace countries. In the biological regenerative life support system, microorganisms are the decomposers in the system, and their main function is to decompose various organic pollutants (mainly in exhaust gas, wastewater and waste) in the system into other organisms in the system...

AI Technical Summary

Problems solved by technology

However, since the current membrane technology is only applied on the ground, the choice of the form, structure, material and working method of the membrane will affect the dissolution of oxygen and the utilization of microorganisms.

Therefore, there is no mature technical reference on how to reasonably select the material and structure of the membrane, set up an appropriate working mode, and improve the utilization rate of oxygen under space microgravity conditions, and a large number of experiments in combination with practice are still needed

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