The primary organisms involved are bacteria, but other microbes also play vital roles. Within this system, the “cleanup crew” has two primary roles:

1. Primary Feeders (The Recyclers): Bacteria are the main workforce. They consume the organic matter from the wastewater, which scientists refer to as the substrate or food source.
2. Secondary Feeders (The Managers): Protozoa are larger microorganisms that feed on the bacteria. This helps control the bacterial population and keeps the ecosystem in balance.

Like any ecosystem, it’s a full life cycle: bacteria consume the waste, protozoa manage the bacteria, and when organisms die, their “lysed products” and “dead biomass” become food for others, ensuring nothing is wasted.

These microorganisms don’t work alone. They clump together in a biomass, a “gelatinous mass” also known as a biological floc. This clumping is crucial because it allows the microbial colonies, now heavy with consumed waste, to be easily separated from the water later in the process.

Now that we’ve met the crew, let’s explore exactly how they turn pollution into fuel.