There are 4 different types of stabilization ponds – Facultative ponds Maturation ponds River purification lakes High-rate aerobic stabilization ponds . 2 3 Oxidation pond 1 in the treatment system in Wellington, TX, USA. Aerobic (high-rate) pond in which there is no significant anaerobic or slndge zone. Oxidation ponds have many advantages. Anaerobic ponds, in which the conlribution of any possible aerobic suface layer is small. 2 Facultative lagoon in the treatment system in Wellington, TX, USA. They cover 49 acres of space; The volume of the ponds is generally around 88 million gallons by the microbial interaction, primarily bacteria and algae. These include aerobic, anaerobic, and facultative ponds. Anaerobic ponds, in which the contribution of any possible aerobic surface layer is small. The presence or absence of oxygen varies with the three different types of ponds, used in sequence. oxidation ponds are the types of ponds in which the waste water is allowed to get treated under the action of aerobic and anaerobic processes by algae and aerobic microorganisms. Oxidation pond can define as the stabilization pond that stabilizes the domestic, trade, industrial wastes etc. Facultative ponds A facultative pond is a treatment unit with anaerobic and aerobic conditions. Photograph taken by the author Fig. oxidation ponds are the types of ponds in which the waste water is allowed to get treated under the action of aerobic and anaerobic processes by algae and aerobic microorganisms. stabilization ponds is biological treatment systems in which stabilization of organic material is carried out by bacterial oxidation and/or photosynthetic reduction of algae. Fig. Waste stabilization ponds consist of man-made basins comprising a single or several series of anaerobic, facultative or maturation ponds. Many of the topics have applications at either full scale or in isolation for laboratory analysis. OXIDATION PONDS Oxidation ponds are aerobic systems The oxygen required by the heterotrophic bacteria is provided not only by transfer from the atmosphere but also by photosynthetic algae. The pond system consists of a facultative lagoon (1) and three oxidation ponds (2–4) (Google Map 2014) Appl Water Sci (2017) 7:31–51 33 123. They are: anaerobic, facultative, and maturation ponds. first yr. 2015-16 oxidation pond 1 2. content oxidation pond ?