SEWAGE TREATMENT PLANT (STP)
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Sewage Treatment Plant (STP)
Effluent Treatment Plant(ETP)
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What is Sewage Treatment Plant (STP) and why its needed ?
Essentially, a sewage treatment plant operates by circulating air to encourage the growth of bacteria to break down sewage. The goal is to deliver much cleaner, more environmentally friendly effluent. It involves a similar process to a typical septic tank but has some key differences. Sewage treatment plants, depending on their size, can treat the waste of commercial properties or a number of domestic dwellings.
The general construction of a sewage treatment plant doesn’t differ too drastically from that of a septic tank. Just as with a septic tank, sewage flows from the property being serviced into the first chamber of the sewage treatment plant. Here, the water sits until grease, oil and scum have floated to the top and solids have settled on the bottom of the tank.
Once the process of separation has taken place, the liquid travels into a second chamber which is where sewage treatment plants differ from septic tanks. This chamber is fitted with an air pump that circulates air around the chamber to encourage the growth of aerobic bacteria. This bacteria helps to break down the contaminants in the water, effectively cleaning it.
The final stage of a sewage treatment plant is one last settlement tank. This final tank allows the very last solids that may remain to sink to the bottom of the tank before the effluent is discharged into a soakaway or watercourse.
Once the treatment process has been completed and the wastewater has been treated as thoroughly as possible, it can be discharged into the environment. This is another key area where sewage treatment plants differ from sewage treatment plants. Whereas you must discharge effluent from a septic tank into a soakaway for further treatment in the ground, subject to an Environment Agency Consent to Discharge, you can discharge your effluent into local water sources straight from your treatment plant. This is because of the vastly improved effluent quality that the treatment process produces.
4 Main Stage of the Waste Water Treatment Plant Process
Preliminary – in the preliminary stage of the wastewater treatment process, large, bulky solids are removed by a series of methods including:
- Screening – the wastewater passes through a series of screens containing openings and large matter is filtered out. The openings of the screens reduce in size so that smaller waste materials are separated out.
- Grit removal – grit, sand, stones and other smaller debris in the water settle for easier removal.
Primary – this is the first stage in cleansing the water. Water is left in sedimentation tanks for a period of time to allow any remaining solids to settle at the bottom of the tank as sludge. Any grease or oil can then rise to the top of the tank as scum which can be skimmed from the wastewater.
Secondary – this is the second stage in the water treatment process, where biological methods are used to remove any remaining organic compounds from the wastewater. Effluent that has been treated to a secondary standard is considered safe for certain applications such as irrigation. However, water will need to undergo a final treatment stage in order to be safe for human consumption.
Tertiary – the final stage in the wastewater treatment process is where the water is disinfected to achieve a drinking water quality standard. There are a number of techniques used in the disinfection of water, including:
- UV disinfection – ultraviolet lamps emit UV light which destroys the DNA of bacteria.
- Chemical processes – chemicals such as chlorine are used to destroy microorganisms.
The aim of a wastewater treatment plant is to achieve water quality standards in line with water safety regulations. This is an on-going process which allows us to enjoy safe, clean drinking water straight from the tap.
Applications Area
The application area for this Plants industry types are described below:
Textiles, Pharmaceuticals, Chemicals, Breweries, Swimming pools, Potable Water, Hospitals, Automobile, and Battery, Fertilizers etc.
We Offer
Our company offers excellent quality services for Sewage Treatment Plant (STP) installation through technically advanced process. Today, we are regarded as one of the trusted Sewage Treatment Plant (STP) Plant Service Provider.