What are maturation ponds?
What are maturation ponds?
Maturation ponds (low-cost polishing ponds), which generally follow either the primary or secondary facultative pond, are primarily designed for tertiary treatment, i.e., the removal of pathogens, nutrients and possibly algae. Each of the maturation ponds can expected to remove one log cycle of MEN.
What is the operational principle of waste stabilization ponds?
Working Principle Due to the algal activity, pH rises leading to inactivation of some pathogens and volatilisation of ammonia. The last ponds serves for the retention of stabilised solids and the inactivation of pathogenic microorganisms via heating rise of pH and solar disinfection.
What are wastewater ponds?
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 wastewater 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 are the various waste stabilization ponds?
Waste Stabilization Ponds (WSPs) are large, man-made water bodies. There are three types of ponds, (1) anaerobic, (2) facultative and (3) aerobic (maturation), each with different treatment and design characteristics.
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. They all have in common the use of oxygen (or air) and microbial action to reduce the pollutants in wastewaters.
What is stabilization of sewage?
Stabilization is a chemical or biological process that stops the natural fermentation of the sludge. Chemical stabilization is almost always performed with lime. Thus lime stabilization is the process where the sludge is mixed with lime to raise the pH to greater than 12.
What is stabilization in water treatment?
Stabilization is a chemical or biological process that stops the natural fermentation of the sludge. Thus lime stabilization is the process where the sludge is mixed with lime to raise the pH to greater than 12. …
How many types of aerated ponds are present?
two types
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.
Does aeration reduce cod?
Aeration should help reduce the COD in 2 ways. First it may evaporate some volatiles like hexane. Second it will add oxygen to the water speeding up any biological oxidation of the less volatile organics by the bacteria (microbial growth). It will actually increase the COD very quickly.
What is extended aeration in wastewater?
The extended aeration process is one modification of the activated sludge process which provides biological treatment for the removal of biodegradable organic wastes under aerobic conditions. Air may be supplied by mechanical or diffused aeration to provide the oxygen required to sustain the aerobic biological process.
Does aeration reduce BOD?
Aeration is used to operate activated sludge process units and is perhaps the most frequently used process to remove biochemical oxygen demand (BOD) from wastewater. After performing these operations, the primary treated wastewater entering the activated sludge system achieves BOD removal based on the details below.
