How do Waste stabilization ponds work?
Pond systems stabilize organic material through natural processes involving sunlight, water, nutrients, algae, atmospheric oxygen and bacterial action. Organic matter in the wastewater is broken down by aerobic bacteria and oxygen found in the pond.
What are the various Waste stabilization ponds?
There are three types of ponds, (1) anaerobic, (2) facultative and (3) aerobic (maturation), each with different treatment and design characteristics. WSPs are low-cost for O&M and BOD and pathogenremoval is high.
What are the advantages of Waste stabilization pond system?
The advantages of stabilization ponds include limited technological investment, low cost, cheap/unskilled labour, and minimal maintenance costs (Mara, 2003; Jiménez et al., 2010).
What is the percentage removal of BOD by Stabilisation ponds?
Explanation: EPA regulations describe stabilization ponds as providing treatment equivalent to secondary treatment removing 65 percent of the BOD and suspended solids from incoming sewage and discharging approximately 50 percent higher effluent concentrations than modern bioreactors. 7.
What do you understand by waste stabilization ponds explain the working principle of aerobic stabilization pond?
Waste stabilization ponds (WSPs or stabilization ponds or waste stabilization lagoons) are ponds designed and built for wastewater treatment to reduce the organic content and remove pathogens from wastewater. They are man-made depressions confined by earthen structures.
How do oxidation ponds work?
Oxidation ponds, also called lagoons or stabilization ponds, are large, shallow ponds designed to treat wastewater through the interaction of sunlight, bacteria, and algae. During the process of photosynthesis, the algae release oxygen needed by aerobic bacteria.
How is activated sludge different from stabilization pond?
The removal mechanisms of bacteria in an activated sludge system are inactivation, hunting by ciliate protozoa, adsorption to solids and capsulation inside the sludge flocs, while in the stabilization ponds they are removed due to extreme temperature, high retention time, increased pH, extracellular antibacterial …
What is the role of aerated lagoons and stabilization ponds in the treatment of wastewater engineering?
An aerated lagoon (or aerated pond) is a simple wastewater treatment system consisting of a pond with artificial aeration to promote the biological oxidation of wastewaters.
What are wastewater ponds?
Sewage lagoons are also called effluent ponds. The sewage and effluent are broken down by germs in the lagoon. The sun and wind play an important role in the working of the lagoon. They provide light, warmth and oxygen to the water. This is necessary for the growth of the bacteria in the water.
How stabilization ponds are used for wastewater treatment?
The first pond biome in a series of stabilization ponds digests the putrescible solids suspended in the wastewater being treated. Anaerobic ponds allow solids to settle down at the bottom as sludge. This settling removes a portion of the particulate organic material.
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 difference between oxidation pond and oxidation ditch?
1) It can be easily maintained. 2) It is hard to be effected by load fluctuations and forms only a little sludge. 3) OD can be easily controlled by changing the rotation of the rotor and the dipping depth. 4) It requires relatively little energy as the rotor is operated efficiency.