Waste Stabilisation Ponds are relatively shallow bodies of wastewater contained in an earthen basin. Their other common name is “Oxidation Ponds”.
These are very popular wastewater treatment processes in small communities because of their low construction and operating costs which offer significant financial advantages over other treatment methods. Ponds have also been used extensively for the treatment of industrial wastewater and mixtures of industrial and domestic wastewater amenable to biological treatment.
As wastewater enters a pond, the heavy gross solids settle to join an actively digesting anaerobic sludge layer. Floating debris disperses on the surface and dissolved solids and nutrients are aerobically broken down by a teeming mass of micro-organisms. At the interface near the bottom just above the anaerobic layer, facultative bacteria survive. As sunlight can penetrate to this depth and plenty of nutrients and carbon dioxide are present, it is also an area of intense algal activity and reproduction.
There are a variety of pond systems their names mainly based on their organic loading.
All of them, however discharge masses of algae which, in most circumstances is no longer an acceptable quality for the environment.
As such most ponds have additional treatment processes installed, in-pond modifications or land disposal.
This course will give an overview of wastewater pond treatment systems, operational issues and corrective actions. There will be a site visit to view discharge treatment options.
There will be a short assessment at the end of the course and participants who successfully complete will be awarded a digital certificate and an electronic badge.