Waste Water Treatment

Waste water treatment is the process of removing contaminants from wastewater, including household sewage and runoff (effluents). It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants. Its objective is to produce an environmentally safe fluid waste stream (or treated effluent) and a solid waste (or treated sludge) suitable for disposal or reuse (usually as farm fertilizer). With suitable technology, it is possible to re-use sewage effluent for drinking water, although this is usually only done in places with limited water supplies.

Waste Water Treatment

Waste Water Treatment Plants

Sewage can be treated close to where the sewage is created, a decentralized system (in septic tanks, biofilters or aerobic treatment systems), or be collected and transported by a network of pipes and pump stations to a municipal treatment plant, a centralized system (see sewerage and pipes and infrastructure). Sewage collection and treatment is typically subject to local, state and federal regulations and standards. Industrial sources of sewage often require specialized treatment processes. Sewage treatment generally involves three stages, called primary, secondary and tertiary treatment.

Primary treatment consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be discharged or waste water treatment company in kerala subjected to secondary treatment. Secondary treatment removes dissolved and suspended biological matter. Secondary treatment is typically performed by indigenous, water-borne micro-organisms in a managed habitat. Secondary treatment may require a separation process to remove the micro-organisms from the treated water prior to discharge or tertiary treatment. Tertiary treatment is sometimes defined as anything more than primary and secondary treatment in order to allow rejection into a highly sensitive or fragile ecosystem (estuaries, low-flow rivers, coral reefs,...). Treated water is sometimes disinfected chemically or physically (for example, by lagoons and microfiltration) prior to discharge 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.

Treatment Segments:

  • Aerators, Flash Mixers, Flocculators Clarifier
  • Parallel Plate separator, Tube Settler, HRSCC
  • Clariflocculator Sand Filtration
  • Dual Media Filters
  • Activated Carbon filters, Ultra Filtration Mill Scale Filtration

  • Chlorination
  • Side Stream Filter, Softener
  • Chemical Dosing System

  • DM plant
  • RO unit
  • Ultra Filtration
  • Condensate Polishing

  • Backwash/DM Water treatment
  • Cooling Tower/Boiler Blow down

  • Moving Media Bioreactor, MBR systems, Sewage Recycle Plant

  • API/Tilted Plate Interceptor (TPI)



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