Sewage Treatment Plant

Sewage treatment is the process of removing contaminants from domestic wastewater, Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater (or treated effluent) that is safe enough for release to the environment. A by-product of sewage treatment is a semi-solid waste or slurry, called sewage sludge. The sludge has to undergo further treatment before being suitable for disposal or application to land.
Water Care Systems is a leading Sewage treatment plant manufacturer in Bhubaneswar, Odisha, providing best solutions for healthy, hygienic and purified water and providing best services at affordable prices. We are using following technologies in STPs.

• MBBR (Moving Bed Biofilm Reactor)
• MBR (Membrane Bio Reactor)
• SBR (Sequencing Batch Reactor)
• Upflow Anaerobic Sludge Blanket Reactor (UASB), Anaerobic Sludge Digestion

The Moving Bed Biofilm Reactor process refers to the operation of activated sludge tanks in various configurations in a combination of:

1. Suspended biomass
2. MLSS (mixed liquor suspended solids)
3. Attached biomass

• Packaged or in Civil Construction
• Energy Efficient
• Compact and user friendly
• Better specific volumetric capacity of activated sludge tanks
• Controlled biomass activity
• Reduced operating cost

The term ‘Membrane Bioreactor’ (MBR) is generally used to define wastewater treatment processes where a perm-selective membrane e.g. microfiltration or ultra filtration is integrated with a biological process – a suspended growth bioreactor. MBRs differ from ‘polishing’ processes where the membrane is employed as a discrete tertiary treatment step with no return of the active biomass to the biological process.

All commercial MBR processes available today use the membrane as a filter, rejecting the solid materials which are developed by the biological process, resulting in a clarified and disinfected product effluent.

A membrane bio reactor is essentially a version of the Conventional Activated Sludge (CAS) system. While the CAS process uses a secondary clarifier or settlement tank for solid/liquid separation, an MBR uses a membrane for this function. This provides a number of advantages relating to process control and product water quality.

• Compactness and small layout size of the plant
• Simple management of the plant, as a result of high degree of automation (low dependence on human factor)
• Small quantity of excess sludge and there with connected costs
• Constant effluent quality
• Operation costs are lower than in conventional biological plant
• Almost bacteria is removed
• Possibility of reuse of treated wastewater for flushing, HVAC, irrigation purposes or as process water
• No odor emission
• Fast construction, because of relatively small size of the plant
• Reduced quantity of chemicals needed
• Reduces even slowly degradable BPK5
• No risk of biomass loss
• Flexibility on maximal and minimal inflows, within the given parameters
• No need for permanent crew
• MBR technology belongs to the group of so called “Green Technologies”
• Possibility of underground or surface type of construction, with architectural solutions for blending in environment
• MBR plants enable total waste water management

As opposed to the conventional activated sludge process in which wastewater treatment takes place in various, linearly arranged tanks, the SBR process (Sequencing Batch Reactor) occurs sequentially in the same tank. The resulting typical process step sequence is as follows:

• Filling and mixing or aeration
• Aeration
• Sedimentation
• Withdrawal of the treated water

Due to the batch charging of the tanks, continuous wastewater treatment demands that an SBR plant consists of various SBRs and/or of a buffer tank.

• Operating flexibility and control
• Potential capital cost savings by eliminating clarifiers and other equipment
• Equalization, primary clarification (in most cases), biological treatment, and secondary clarification can be achieved in a single reactor vessel
• Minimal footprint
• Single tank design

The upflow anaerobic sludge blanket reactor (UASB) is a single tank process. Wastewater enters the reactor from the bottom, and flows upward. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it.

• High reduction of BOD
• Can withstand high organic and hydraulic loading rates
• Low sludge production (and, thus, infrequent desludging required)
• Biogas can be used for energy (but usually first requires scrubbing)