excess sludge

A wastewater treatment plant has to pay to get rid of that excess sludge.

Excess sludge is drawn off periodically and taken to drying lagoons.

It was proposed to store the excess sludge on site and dispose of it all once the plant closed.

In addition the excess sludge extracted from the digester was showing an improved thickness. 3. After three months of treatment After three months of treatment.

Increased sludge production in the A-stage results in increased biogas production in the digester (for plants with anaerobic digestion of excess sludge).

Excess sludge will be used for landfill in what is a greenfields industrial complex and the treatment facilities will ultimately service four other factories producing Yakult, noodles, orange juice and ice cream.

Excess sludge is called "surplus activated sludge" or "waste activated sludge" and is removed from the treatment process to keep the ratio of biomass to food supplied in the wastewater in balance.

The total sludge production from a wastewater treatment process is the sum of sludge from primary settling tanks (if they are part of the process configuration) plus excess sludge from the biological treatment step.

Some critics assert that the disposal of this sludge is not responsibly overseen in the United States, so the excess sludge is sometimes spread on public forest or even agricultural land, dumped in landfills or the ocean, and sometimes incinerated.