What is STP?

  •        STP receives the waste from domestic, commercial and industrial sources and filters it to remove the harmful substances that deteriorate water quality and affect public health and safety when discharged into rivers, canals, and other water bodies.   

We provide various chemical, physical and biological interaction to take out wastewater and to deliver an earth safe liquid waste stream.

          The objective behind supplying the commercial STP in the country is to create a disposable effluent without carrying any harm to the surrounding environment.

1.     What is Sewage?

Wastewater produced by a community is referred to as sewage
a) Domestic wastewater from sinks, toilets, and other plumbing fixtures
b) Discharges of untreated or treated industrial effluent into the sewage systems.
c) Runoff from cities and rainwater.

The primary component of sewage is domestic wastewater. Sewage flow rates and composition vary from location to location based on economic factors, social behavior, the type and number of industries present, climatic conditions, water usage, type of sewer systems, etc. Suspended particles, soluble organic compounds, and faucal pathogenic bacteria are the three primary contaminants in sewage. In addition to human waste and water, sewage also contains a wide range of chemicals, including pesticides, heavy metals, trace elements, detergents, solvents, and other odd substances including medicines, antibiotics, and hormones, as well. hazardous substances, such as pesticides and vehicle oil, are carried out by urban runoff.


Domestic sewage, industrial sewage, and storm sewage are the three main categories of sewage.

  •  Household or sanitary sewage

Domestic sewage is made up of liquid wastes that are discharged from urinals, latrines, bathrooms, kitchen sinks, wash basins, and other plumbing devices in residential, commercial, or institutional structures. The extremely offensive odour of this sewage is caused by the inclusion of human excreta.

  •  Wastewater or Industrial Sewage

Industrial sewage is made up of liquid wastes from various industrial operations, such as dyeing, paper manufacture, brewing, etc. Industrial sewage quality depends on the type of industry and the chemicals used in their process waters. Before being disposed of in public drains, they may occasionally be exceedingly foul and require extensive treatment.

  • It is important to take care of both the environment and our personal health.
  • To prevent groundwater pollution
  • To prevent sea shore
  • To prevent marine life
  • Protection of public life
  • To reuse the treated effluent, for agriculture,  groundwater recharge,  industrial recycle
  • Resolving the social issue brought on by the buildup of wastewater.

The environment and human health could be significantly damaged by improper wastewater treatment.

1. Characteristics of waste water

Wastewater is characterized as, Physical, Chemical, Biological

a.  Physical Characteristics of Wastewater

The physical characteristics of wastewater are based on color, odor, temperature, solids and turbidity.

• Color: Common wastewater is grey and appears hazy. While going to the septic, the wastewater’s color will change (if travel time in the collection system increases). Sewage from a septic system will be dark in color.

  • Odor: Domestic wastewater that is still fresh has a musty smell. This smell will turn into a rotten egg smell if the wastewater is permitted to go septic.
  • Temperature: To encourage biological activity, sewage should be maintained at a temperature of 20 °C. Wastewater frequently has a higher temperature than the water as a result of the addition of warm water from households and industrial buildings.
  • Supply Solids: Except for water, all substances in a liquid are referred to as solids. Total solids are all the materials that evaporate at 103 to 105 degrees Celsius and remain as residue. Those materials in wastewater that are not dissolved are referred to as suspended solids. Scum or floatable solids are the terms used to describe suspended materials that float. Grit, sludge, or settle able solids are the names for those suspended materials that eventually settle. Volatile solids are any solids that burn or evaporate between 500°C and 600°C. Fixed solids are those substances that do not burn or evaporate at temperatures between 500°C and 600°C but instead remain as a residue. Grit, clay, salts, and metals are all possible components of fixed solids, which are often inorganic in nature.
  • Turbidity: The amount that material floating in water reduces light transmission through the water is referred to as turbidity, which is a measure of water clarity.
b.  Chemical Characteristics of Wastewater

               Chemical characteristics of wastewater are: organic matter, measurements of organic matter, inorganic matter, gases, and pH.

  • Inorganic Matter: Chloride, nitrogen, phosphorus, Sulphur, hazardous inorganic compounds, and heavy metals are the inorganic substances in wastewater that are of concern.
  • Organic Matter: Carbohydrates like cellulose, cotton, Fibre, starch, sugar, etc. make up organic matter. oils and fats retrieved from garages, businesses, laundries, etc. proteins and the byproducts of protein breakdown are nitrogenous substances.
  • pH: This technique is used to determine how acidic the wastewater is. The pH scale ranges from 1 to 14. The pH of wastewater should typically be between 6.5 and 9.0. The pH value of the sewage must be determined, which is crucial.
  • Gases: The wastewater’s composition determines the specific gases and typical concentrations. Carbon dioxide, hydrogen Sulphide, and oxygen are all commonly found in relatively low amounts in home wastewater.
  • Oxygen Demand: There are three ways of expressing oxygen demand like as Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Theoretical Oxygen Demand (ThOD).
c.  Biological Characteristics of Wastewater

The presence of bacteria and other live creatures, such as algae, fungi, protozoa, etc., is what gives sewage its biological features.

Sewage Treatment Plant Process-STP:-
  1. Primary Treatment – It includes physical treatment which consists of screening, oil & grease removal, collection/ Equalization.
  2. Secondary Treatment – It includes biological treatment to degrade the complex organic matter into simpler compounds by micro- organisms.
  3. Tertiary Treatment –It disinfect the effluent by killing pathogenic bacteria and to remove residual suspended solids, organic matter, color, odor etc.
Objectives of STP:-

a. To create a solid waste stream that is appropriate for reuse or disposal and a fluid waste stream that is safe for the environment.

b. To create disposable effluent without endangering the environment and to stop pollution.

c. To prepare human waste for disposal without endangering the environment or human health.

Additionally, it uses MBBR, or Moving Bed Bio Reactor, technology to efficiently and thoroughly filter water. Innovative technology known as the MBR (Membrane Bioreactor System) provides users with many operational and financial advantages over the price of traditional wastewater treatment facilities. Last but not least, our experts use SAFFR as another way for treating water.

In numerous industries, including the hospital, mechanical, food, and medical, we have offered STP services. The capacity ranges from around 1 KLD to 300 KLD.

What are the advantages of installing STP?
  1. Reliable, unlikely to experience issues, and simply requires routine maintenance.
  2. Installation is possible even on difficult or small places.
  3. Cost-effective over time, requiring only payment for installation, power, and maintenance.
The following are the names of the businesses where we put our STP plant:
  1. Sahuwala Cereals Pvt Ltd, Pune
  2. Palm Grove Eco Resort, Andaman & Nicobar Islands
  3. Bahirat Estates LLP, Pune
  4. Ocean Highway facilities & solution Pvt Ltd, Lonand
  5. Cooper Corporation Pvt Ltd, Satara
  6. Cogeme Precision parts India Pvt Ltd
  7. Hy – Tech Engineering Pvt Ltd, Satara
  8. Inteva Product India Automotive Pvt Ltd, Pune
  9. Kelkar Auto parts Pvt Ltd, Pune
  10. Sejal World, Pune

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