We propose to classify microorganisms in activated sludge ecosystems as abundant core or abundant transient, and that they are not primarily present due to immigration but to growth within the system.

It is expected that some physicochemical changes (e.g., influent salinity) might disturb the microbial interactions among various functional populations (e.g., heterotrophic bacteria, nitrifiers ...

The researchers found that reducing the amount of KOH used by at least 50%, with a sludge-to-KOH ratio of 3:1 at a maximum temperature of 800 °C (1,472 °F) was optimal, producing a yield of 0.63 ...

Port Hawkesbury Paper is turning to a small army of micro-organisms to treat its excess water. The paper mill is using microbes to treat 30,000 cubic metres of sludge every day.

The bugs eat the raw waste to help solidify it for removal, part of the "activated sludge" treatment process that the plant uses. "We've got micro-organisms in us, helping us digest," Stafford said.