Ben & Gaws is specialized on turnkey wastewater treatment projects, wherein the contaminants are removed from wastewater as well as household sewage, to produce waste stream or solid waste suitable for discharge or reuse. Wastewater treatment methods are categorized into three sub-divisions, physical, chemical and biological.

Levels of Wastewater Treatment options may be classified into the groups of processes according to the function they perform and their complexity:

Preliminary Treatment – includes simple processes that deal with debris and solid material. The purpose of preliminary treatment is to remove those easily separable components. This is usually performed by screening (usually by bar screens) and grit removal. Their removal is important in order to increase the effectiveness of the later treatment processes and prevent damages to the pipes, pumps and fittings.

Primary Treatment – is mainly the removal of solids by settlement. Simple settlement of the solid material in sewage can reduce the polluting load by significant amounts. It can reduce BOD up to 40%. Some examples of primary treatment is septic tanks, septic tanks with up-flow filters etc.

Secondary Treatment – In secondary treatment the organic material that remains in the wastewater is reduced biologically. Secondary treatment actually involves harnessing and accelerating the natural process of waste disposal whereby bacteria convert organic matter to stable forms. Both aerobic and anaerobic processes are employed in secondary treatment. Some examples of secondary treatment are UASB, reed bed systems, trickling filters and stabilization ponds.

Tertiary treatment – is the polishing process whereby treated effluent is further purified to acceptable levels for discharge. It is usually for the removal of specific pollutants e.g. nitrogen or phosphorus or specific industrial pollutants. Tertiary treatment processes are generally specialized processes. Some examples of tertiary treatment are bank’s clarifiers, grass plots, etc

Most secondary treatment processes are biological in their nature – i.e. they use the natural activity of the bacteria to break down polluting material. Biological treatment processes can themselves be divided into two general sub-divisions – aerobic and anaerobic processes. Advanced treatment are applicable only to industrial wastes to remove specific contaminants.

Primary treatment

Secondary Treatment

Tertiary Treatment

Advanced Treatment

Bar or Bow Screen
Grit removal
Oil/ fat removal
Flow equalization
pH neutralization
Imhoff tank

Activated Sludge
Extended Aeration
Aerated lagoon
Trickling filter
Rotation bio-discs
anaerobic Sequence
batch reactor
Anaerobic filter

Denitrification Chem.
Filtration Chemical
Oxidation Biological

Chemical treatment
reverse Osmosis
Electro dialysis
Carbon adsorption
Selective ion

We Design, Manufacture, Supply, Erection and Commissioning Effluent Treatment Plant (ETP) on Turnkey basis for various types and natures of wastewaters, effluents which combines advanced physico-chemical treatment processes with tertiary polishing system for the removal of organic, inorganic, oil and grease, heavy metals & suspended solids.

We analyze the effluent samples for different effluent parameters as per nature and compositions, carry out the treatability studies by using different methods checking techno-commercial Feasibility and then designed treatment schemes, processes accordingly to suit the purpose and need.

Our ETP systems are very compact, tailor made designs, portable required very less foot-print to accommodate, energy efficient. The up-gradation, modification in the existing ETP system is possible to achieve desired limiting standard laid down by the Pollution Control Board (PCB).

The Principle:
The principle of operation of ETP is Physic-Chemical treatment followed by Polishing Treatments like –Sand Filtration, Activated Charcoal treatment (Adsorption), Ozonisation (Chemical Oxidation), Ultra Filtration (UF), Reverse Osmosis (RO) and evaporation (If required).

As the effluent characteristics changes from company to company, so it becomes vary important to carry out the Feasibility & Treatability study of the effluent. According to the study we suggest the necessary treatment options and steps. We have various pilot plants at our MoEF laboratory for carrying out the study. We suggest the optimum solution as per the effluent Characteristics.

We Design, Fabricate, Supply, Erection and Commissioning Sewage Treatment Plants (STP) for treating sewage generated by Industry, Hotels, Hospitals, IT Parks and commercial buildings.

Sewage Treatment Plant (STP) became statutory requirement of all the State Pollution Control Boards, everybody, whether Hotelier or Industrialist were looking for economical, easy to install and operate compact type Sewage Treatment Plant.

Principle of Treatment :
Its working on the principle of Aerobic Treatment with the help of aerobic bacteria, which is most conventional and proven method throughout the world.  Its works on principle on anaerobic digestion.

Technologies Used :

  • ASP : Activated Sludge Process
  • MBBR : Moving Bed Bio reactor
  • SAFF : Submerged aerated Fixed Film
  • SBR : Sequential Bioreactor
  • MBR : Membrane Bio Reactor

Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants from wastewater and household sewage, both runoff (effluents) and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants.

We provide end to end solution for Grey water treatment. We have various options of treatment of water according to space availability, Budget & Location we are suggesting the optimum solution.

Note: We are manufacturer and supplier of Water Treatment Plant , Rain water harvesting Plant for India, Bangladesh, Sri Lanka, Nepal, Myanmar, Indonesia, Cambodia, Vietnam, Egypt, Saudi Arabia, Iran, Oman, Jordon, Tanzania, South Africa, Namibia, Kenya, Nigeria, Zambia, Ethiopia, Argentina, Bolivia, Mexico, Peru, Brazil, Colombia.