A common problem is the ability to control high BOD/COD (Biological Oxygen Demand) levels in a system. The first thought that there is not enough oxygen in the system to do its job. This is usually based on suspicions that the mechanical processes that generate air and oxygen - in relation to the volume capacity of the system, are not functioning well enough or are inadequate. Traditional methods trend to either increase the oxygen levels (dissolved oxygen) and or increase the retention capacity. This is typically the engineering solution and does not always solve the problem.
In anaerobic conditions, failures are often due to the incorrect levels of carbon, nitrogen and phosphorous. Liebig's Law states that the productivity of any complex system dependent on numerous essential inputs, is limited by the single variable in least supply.
In this case, the anaerobic microbes required to perform the degrading function will die if not provided with the correct balance of nutrients. As they oxidize they produce acid, which disrupts the total balance of the microbial populations. Due to the competitive nature of microbes, the non-beneficial bacteria will dominate producing an excessive level of pathogens and toxins. This will lead to "stalling" or grid-lock and high BOD's with foul odors.
The indigenous microbial species found in a typical wastewater systems are often overwhelmed by system upsets. Harsh chemicals, disinfectants and chlorination will have a detrimental effect on microbial populations making systems less efficient. Sludge build-ups occur, tank deposits, back-ups, floating grease pads, fouled drain fields are just some of the problems encountered when microbial populations are not maintained at optimum levels.
With a better understanding of the inhibitory factors which cause the desired microbial populations to diminish, we address the cause of the problem, and only then re-populate the system with the specific microbes (augmentation) in the correct numbers, inoculating it with high CFU counts (colony forming units).
More information on microbes and a wastewater system
More information on Eutro-Clear SB BOD reduction