Sewage Treatment
Sewage treatment plant is basically characterized as below system based on usage
of Oxygen / Air in Secondary Treatment Stage (Biological Decomposition of organic matter).
Aerobic STP
Here Oxygen/Air is continuously supplied to the Biological (Aeration) Reactor either by direct Surface Aeration system using Impellers propelled by Pumps or Submerged Diffused Aeration system using Air Root Blowers for Air supply through diffusers. Aerobic condition leads to complete oxidation of Organic Matter to Carbon Dioxide, Water, Nitrogen etc. thus eliminating Odor problem caused due to incomplete oxidation. Also Air supply aids in uniform and efficient mixing inside the tank.
Anaerobic STP
Here sewage is partially decomposed in closed Biological Reactor in absence of Air which leads to reduction of Organic Matter into Methane, Hydrogen Sulfide, Carbon Dioxide etc. It is widely used to treat wastewater sludge and organic waste because it provides volume and mass reduction of the input material to a large extent.
Conventional
Sewage treatment plant involves three stages, called primary, secondary and tertiary treatment.
First, the solids are separated from the wastewater stream. Then dissolved biological matter is progressively converted into a solid mass by using indigenous, water-borne micro-organisms. Finally, the biological solids are neutralized then disposed of or re-used, and the treated water may be disinfected chemically or physically (for example by lagoons and microfiltration).
The final effluent can be discharged into a stream, river, bay, lagoon or wetland, or it can be used for the irrigation of a golf course, green way or park. If it is sufficiently clean, it can also be used for groundwater recharge or agricultural purposes.
There are areas within the cities, towns and villages that are impossible to cover under centralized wastewater treatment system, to offer perfect solution for the same, Shubham steps in this field. Shubham package type wastewater treatment system is compact, effective and economical for wastewater treatment in decentralized manner. PWTS-AM series is ideal for individual bungalows, low rise apartments, restaurants, offices, small factories, etc. NBF series is ideal for malls, hospitals, office building, institutions, townships/colonies, high rise buildings etc.
Operation Principle
1. Solid Separation Zone: This is the primary treatment process that separates solid and scum from wastewater.
2. Aeration Zone: Clear water flows into this stage. Oxygen supplied by air blowers is required for the digestion of bacteria culture thriving in and around the plastic media inside the aeration zone, thus reducing the amount of contaminants while generating more contacts with the bacteria culture on the surface area of media. The quality of water becomes better.
3. Sedimentation Zone: The next step of treatment involves the sedimentation where organic wastes are settled in the sedimentation zone. The settled waste in the bottom of the tank can then be pumped back to the solid separation as a return sludge to ensure that quality of effluent passes the required standard. Chlorine is sometimes introduced before discharging the effluent into public mains.
Advantages
1. 100% Eco friendly
2. Rust Proof
3. Leak Proof
4. Durable Light Weight
5. Easy to Install
6. Massive reduction of BOD
by: Shubham Inc.
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