Wastewater

Wastewater

Introduction
Screening/Grit
Primary Settling

Solids
Digester
Drying Beds
Belt Filter Press
LSPS

Liquids
Aeration Basin
Final Settling
RAS
Filters
Reuse Tank
Chlorine Contact
Zone of Mixing
Outfall Area

Personnel

Flowchart

Plant Map

Assignment

Black sludge coming from the digester is pumped to a drying bed.

This solid waste is composed of biosolids such as dead bacteria as well as nonbiodegradable solids like cellulose.

The bottom of the bed is made of sand, which allows water to drain out. In addition, exposure to the sun’s heat evaporates water until the moist sludge is caked and dried.

This is the sludge after drying. From here, the hard dry waste matter is loaded onto trucks and taken to a landfill. Since landfill operators charge by mass for dumping, it is important to completely dry this solid sludge.

This dry solid has a potential for reuse and recycling. By mixing it with green waste, this material could be used as fertilizer for trees and ornamental plants (Class B sludge).