Biologic SR2 reduces smell by preventing the production of H2S and ammonia through competitive inhibition. It provides conditions that allow methane producing bacteria to out produce hydrogen sulfide producers; methane being an odorless gas.
Biologic is highly effective and is usually dosed at rates of 1-50 ppm.
For a typical aerated system with a daily flow of 1000L, you would need about 100ml per month, which equates to approximately 3.3ppm.
For composting type systems a more constant dose is preferred. Which could be a couple of capfuls per week, rather than a monthly dose.
It should be introduced via the toilet; this will help convey the SR2 to the system and prevent it from being caught in a gulley trap.
Biologic is not an enzyme-based product and does not contain enzymes. Enzyme products introduce an enzyme which pre-digests the waste for the bacteria to then breakdown, a process called catalysis. They can also work on specific things like fat and grease, which is why enzyme cleaners are popular.
SciCorp BIOLOGIC™ is a proprietary plant-based blend of organic micronutrients that stimulates specific aerobic, anaerobic and facultative bacteria species. In simple terms, Biologic products boost the bacteria to do the job themselves.