Chemical injection system for hydrogen sulfide control in a waste water stream

摘要

An improved computerized process and apparatus system for continuously monitoring the hydrogen sulfide concentration present in the atmosphere above and/or in a waste water stream, such as a sewerage stream, and for controlling based on an intra-day pattern the amount and time of injecting a calculated amount of dopant chemical into the atmosphere above the waste water stream in order to control the quantity of hydrogen sulfide which has evaporated into the atmosphere.