Management Programs for Mitigation
Application of the Septicity Control Program is achieved via the controlled dose of calcium nitrate [Ca(NO3)2] solution to the sewage reticulation, via one of two (2) methods:
- Direct to the wet well of a sewage pump station (most common); or
- Direct to the pressurised rising main, via a specialised tapping saddle.
The BioRemedy Septicity Control Program controlled application is determined by the hydraulic flow characteristics of the section of the sewage reticulation being treated, with the goal of the program to inhibit production of sulphide, in solution, within the pressurised rising main.
The hydraulic flow characteristics determine the variation in the rate of dose of calcium nitrate [Ca(NO3)2] solution required, with hourly sections, within a 24-hour period employed.
Rate of application is determined by the following factors:
- Volume of sewage flow; and
- Retention Time (cumulative) of sewage within the pressurised rising main.
Calculation of Dosing Rates for Calcium Nitrate to Control H2S Generation
To determine the most appropriate dose rates for controlling H2S in a rising main, the following information is required-
- A plan of the sewerage reticulation, showing rising main lengths and diameters
- Pump Station details such as average dry weather flow (ADWF), pump operating levels, and wet well diameter,
- Identification of any sections of the system where turbulence occurs, particularly in a pump station wet well or discharge manhole,
- Typical BOD levels of the sewage, and a description of waste being discharged into the system.
Benefits of the Bioremedy Septicity Control Program
- BioRemedy Septicity Control Program stops not reduces the formation of corrosive compounds including sulphuric acid
- BioRemedy Septicity Control Program stops not reduces the formation of the odour causing gas, Hydrogen Sulphide
- Calcium Nitrate is a Non Hazardous and readily Biodegradable chemical.