—In recent years the waste water ministerial
regulations have led to a constant ascend in the purification
performance demanded of waste water treatment plants.
Because of this, the number of waste water treatment plants
has been maturing, and technical complexity has also been
growing. In order to hold the connected rising costs of capital
expenditure and operation within bounds, sagacious process
technology solutions have to be found. Besides having a deeper
understanding of the individual processes, it is indispensable to
consider the entire waste water treatment plant as a whole.
Most treatment plants consist of a mechanical and biological
waste water purification, sludge treatment and gas utilization.
In three of these four stages, namely in the preliminary and
secondary clarification of the waste water and in the
thickening and dewatering of the sludge, the processes for
solids/liquids separation are of crucial importance.
The efficiency of the solids/liquids separation is mainly
influenced by the properties of the sludge.
—Activated sludge, wastewater, microorganisms, treatment process.
B. Ahansazan, H. Afrashteh, N. Ahansazan, and Z. Ahansazanare with
Ministry of Science, Research and Technology of Iran. Valiasr Technical
College of Tehran, Iran (e-mail: email@example.com).
Cite:B. Ahansazan, H. Afrashteh, N. Ahansazan, and Z. Ahansazan, "Activated Sludge Process Overview," International Journal of Environmental Science and Development vol. 5, no. 1, pp. 81-85, 2014.