M051 MUD 5 Ground Aerator

M051 MUD 5 Ground Aerator
WETS

M051 MUD 5 Ground Aerator

NW Harris County MUD #5 well water contained methane gas, hydrogen sulfide, CO2 and other gases. The major gas component is methane. Methane gas is an explosive gas with lower explosive limits (LEL) of 5% when combined with air. Methane is a very volatile gas which easily separates from water. Once disengaged, the methane gas will accumulate in the top of the ground storage tank and create a potential explosive hazard. There have been a number of incidents, and fatalities, involving exploding water tanks.

Based on its extensive experience as a water treatment company, WETS proposed to remove the methane gas using an aeration water treatment system featuring a 20 ft tall ground aerator. The primary purpose of the ground aerator is the stripping of methane gas from the well water. In this aerator system, the gas is removed from the water and methane is diluted to below the lower explosive limit by air stripping. The methane is safely vented at an elevated discharge point. The aeration is also effective as a hydrogen sulfide treatment, as it also removes other gas contaminants. A receiving tank in the lower section of the aerator provides surge for the two transfer pumps that replenish the ground storage tank.

The aeration system includes area gas detectors, which check for the possibility of gas within the explosive range in the area, which can occur due to incidents like loss of containment or loss of the blower. In the control logic, detection of methane within the explosive range will shut down the motors (for the pumps and blower) to avoid ignition of the potential gas cloud.

Client : Harris County MUD 5

Year : 2022

Category : Aerator