Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae . Algae grow using energy from the sun and carbon dioxide and inorganic compounds released by bacteria in water.
What are the advantages of oxidation pond?
Oxidation ponds have many advantages. The oxidation pond treatment process is natural, because it uses microorganisms such as bacteria and algae. This makes the method of treatment cost-effective in terms of its construction, maintenance, and energy requirements .
What is meant by oxidation ponds?
Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae . Algae grow using energy from the sun and carbon dioxide and inorganic compounds released by bacteria in water.
What is oxidation pond and oxidation ditch?
Aerated lagoons: Pond systems, in which oxygen is provided through mechanical aeration rather than algal photosynthesis are called aerated lagoons. Oxidation ditch: The oxidation ditch is a modified form of “extended aeration” of activated sludge process .
Which bacteria is used in oxidation pond?
Then, the bacteria utilize the biodegradable organics and convert them into inorganic compounds by releasing carbon dioxide. Achromobacter, Proteus, Alcaligenes, Pseudomonas, Thiospirillum, Rhodothecae etc. , are the following genera of the bacteria that predominate in the stabilization pond.
What is the minimum depth of water in the oxidation pond?
Explanation: The minimum depth of water to be kept in oxidation pond is 0.3m and the depth of sludge deposited in the pond is 0.02m per year.
How do sewage ponds work?
Sewage lagoons are also called effluent ponds. The sewage and effluent are broken down by germs in the lagoon . ... Algae helps the bacteria break down the sewage and effluent. The wind helps with the evaporation of the water and serves to get oxygen into the water.
What is the main disadvantage of oxidation pond?
The main disadvantage of oxidation pond is that. BOD removal is very high . Maintenance and operation cost are high.
What is normal depth of oxidation pond?
Typically, these ponds are designed to have a depth of 2–5 m , with a detention time between 1 and 1.5 days, an optimum pH less than 6.2, temperatures greater than 15 °C (Kayombo et al. 2010), and an organic loading rate of 3000 kg ha/day (Quiroga 2011; Kayombo et al. 2010).
What is the detention period of oxidation pond?
Explanation: Oxidation ponds have a long detention period between 10 to 20 days . Explanation: The BOD removal efficiency of an oxidation pond lies between 80% and 90%, so the maximum BOD removal efficiency is 90%. 6. What is the minimum depth of water to be kept in the oxidation pond?
How do oxidation ditches work?
An oxidation ditch is a modified activated sludge biological treatment process that utilizes long solids retention times (SRTs) to remove biodegradable organics . Oxidation ditches are typically complete mix systems, but they can be modified to approach plug flow conditions.
What is oxidation in wastewater treatment?
AOPs are an emerging technology that may be employed for specific goals in wastewater treatment. These AOPs utilize the very strong oxidizing power of hydroxyl radicals to oxidize organic compounds to the preferred end products of carbon dioxide and water.
What is a polishing pond?
A polishing pond is the last in the series of settling ponds , through which the mill effluent is made to flow. The mill effluent is made to flow through a series of waste water treatment ponds before being discharged into the natural environment.
What are primary and secondary ponds?
Facultative stabilization ponds that receive raw wastewater are called primary facultative ponds. If they are receiving wastewater that has already been treated in anaerobic ponds, they are called secondary facultative ponds. ... Heavy algal growth may block sunlight from penetrating into the pond.
How many types of aerated ponds are present?
There are two types of aerated ponds: Aerated facultative ponds or lagoons (see also waste stabilisation pond systems), when it is desired to have a more aerobic system, compacter than normal facultative ponds, or when loads for conventional facultative ponds are too high.
How are the water ponds treat?
- Aerated lagoons rely upon mechanical aerators providing oxygen to reduce the organic content measured as biochemical oxygen demand (BOD).
- Anaerobic lagoons are waste stabilization ponds providing habitat for anaerobic microorganisms.
