Introduction
Subsurface sewage disposal systems are the most significant sources of wastewater to the ground and the most commonly reported sources of ground-water pollution. The probability of ground-water pollution by these systems is highest where septic systems are closely spaced, such as in suburban subdivided tracts.
What exactly are septic tanks?
A septic tank is a concrete, fiberglass, or plastic subterranean chamber through which home wastewater runs for basic treatment. Solids and organics are reduced by settling and anaerobic processes, although treatment effectiveness is only modest. Human waste is treated through septic systems.
Septic tank systems are a simple sort of onsite sewage facility (OSSF). They can be utilized in regions where there is no sewage infrastructure, such as rural areas. The treated liquid effluent is often disposed of in a septic drain field, where it is further treated.Organic materials, bacteria, and most cations are attenuated by well operating systems, while anions are not. Systems located in the zone of saturation are successful at reducing nitrogen but poor at reducing pathogens, organic matter, and phosphorus.
What is the Impact of septic systems on ground water quality?
Despite the fact that community sewage treatment facilities have been in existence in metropolitan areas for centuries, a surprising number of houses continue to discharge their wastewater to on-site treatment systems such as septic tanks. In India, nearly 25% of the population uses septic systems, and it is estimated that more than 500,000,000 on-site treatment systems are in use globally.
On-site treatment is commonly utilized in rural regions, but has lately gained popularity in some metropolitan areas due to perceived reduced capital costs and lower energy use when compared to traditional sewage treatment.Domestic wastewater is high in nutrients, such as nitrogen and phosphorus, and contains other elements that exceed drinking water standards; as a result, wastewater released to septic systems poses a hazard to aquatic ecosystems and creates a risk of groundwater contamination.
Chemical concentrations in drainfield effluent vary depending on the application. Nitrogen, salt, potassium, bicarbonate, chloride, phosphorus, and carbon contents in septic effluent are higher than in ground water for a typical family using the drainfield for discharge of drinking, shower, toilet, and laundry water. When septic sewage is dumped into coarse-textured soils, it travels vertically through the unsaturated zone and into ground water.
However, at septic system sites, a variety of treatment procedures occur in the subsurface that have the potential to reduce pollutant risk. The formation of groundwater plumes from septic systems, with a special emphasis on the destiny of nitrogen and phosphorous.
Conclusion
Because quantities in septic tank effluent are greater than background amounts in the aquifer, bicarbonate, nitrogen, boron, iron, salt, phosphate, and organic carbon are possible pollutants of ground water.As a result, in a plume where bacteria have been found in ground water, a permanent monitoring network should be developed.
Netsol Water, the top producer of all sorts of water treatment plants in India, supplies the best septic tank technology and, depending on client needs, may provide a permanent monitoring network to make septic tanks eco-friendly.
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