A membrane bioreactor for deep-sea cold seeps, comprising a control and acquisition terminal, the membrane bioreactor for deep-sea cold seeps further comprises a sediment simulation chamber, a seawater simulation chamber, a sensor group, a pressure-resistant membrane biological assembly, an online pressure-holding biomembrane sampling element, a resistivity measurement system, a pressure regulation assembly and an ultrasonic observation assembly, wherein
- the sediment simulation chamber is disposed below the seawater simulation chamber, and is in flanged connection to the seawater simulation chamber;
- the sensor group is disposed in the sediment simulation chamber and the seawater simulation chamber, and a signal output end of the sensor group is electrically connected to the control and acquisition terminal;
- the pressure-resistant membrane biological assembly is disposed in the seawater simulation chamber for monitoring formation of a colony biomembrane in a seawater environment;
- the online pressure-holding biomembrane sampling element is disposed on a top of the seawater simulation chamber, and a control end of the online pressure-holding biomembrane sampling element is electrically connected to the control and acquisition terminal for scraping biomembrane samples from different positions of the pressure-resistant membrane biological assembly for sequencing and analysis in a formation process of the biomembrane;
- the resistivity measurement system is disposed in the sediment simulation chamber, and a signal output end of the resistivity measurement system is electrically connected to the control and acquisition terminal for monitoring and measuring saturation changes of methane hydrate formation in sediments in a process of methane seepage simulation;
- the pressure regulation assembly is connected to the seawater simulation chamber through a pipeline, and a control end of the pressure regulation assembly is electrically connected to the control and acquisition terminal for regulating and controlling pressure in the reactor to ensure pressure stability in the reactor;
- and
- an ultrasonic probe of the ultrasonic observation assembly is disposed in the seawater simulation chamber for monitoring thickness changes of the biomembrane on the pressure-resistant membrane biological assembly and outputting a signal to the control and acquisition terminal;
- the pressure-resistant membrane biological assembly is a porous membrane assembly sintered from seawater corrosion-resistant and pressure-resistant titanium alloy powder, and is suspended in the seawater simulation chamber;
- the online pressure-holding biomembrane sampling element comprises a telescopic pressure-resistant cylinder, a sampling ring device and a pressure-holding device, wherein
- the telescopic pressure-resistant cylinder is disposed on the top of the seawater simulation chamber, the sampling ring device is placed in the telescopic pressure-resistant cylinder, and the pressure-holding device is fixedly connected outside the telescopic pressure-resistant cylinder in a sleeving manner;
- and
- a control end of the sampling ring device and a control end of the pressure-holding device are both electrically connected to the control and acquisition terminal.