looking for bioremediation and wastewater treatment ppt

Wastewater Treatment systems rely on microbes to perform the function of the breakdown of sewage influent. These microbes live in the sludge of treatment plants and holding tanks. They digest the solids and breakdown various compounds. Some wastewater treatment systems are exceptionally efficient, others perform effectively soon after start up, but later stop performing as well.
The key to understanding how and why some wastewater treatment systems work well and others don't, is the need to understand what these microbes need to function. As microbes are living organisms, they require certain nutrients and environments to survive, multiply and perform.
In any wastewater treatment system there is a vast array of microbes present, i.e. aerobic, anaerobic and facultative, each performing specific functions in their respective parts of the system.

Each species has a tolerance of ecological minimums and maximums with regard to various conditions; pH, temperature, dissolved oxygen levels and nutrient levels. All microbes require optimal conditions in order to proliferate and infuse the system with sufficient numbers of microbes to maximize the efficiency of the wastewater treatment plant.