...
To inoculate a third UASB to couple with a GSBR unit from the GSBR group to characterize coupled wastewater treatment.
Mid-Semester Progress:
Obtained granules from wastewater treatment plant in Syracuse, NY.
Testing reactors 2.3, 2.4, and 2.5 for leaks using bubble test.
Both solenoid and pinch valves were tested for airtightness using pressure sensors and process controller.
Assembled reactors 2.3, 2.4, and 2.5 in parallel setups using only air and water to identify leak sources and quantify leak rates. All reactors have recirculating water at 6 mL/min and recirculating air at 25 mL/min.
Process Controller was used to setup an off-gas routine: when air accumulates in the head unit such that the pressure sensor detects a difference of 7 cm H20, Process Controller opens a solenoid valve attached to the gas chamber to release the head pressure.
Currently running "retention tests" in which the gas chambers are filled with air and left overnight. A change in pressure or water level indicates a leak. By recording the change in pressure over time, we will calculate the volumetric flow rate of air loss within the reactor head units.