Bacteria, chemicals, and other toxins are among the many contaminants found in wastewater. Its treatment tries to make the water safe for release back into the environment, by lowering the toxins to acceptable levels.

What are the 9 steps of wastewater treatment?

1: Collection of wastewater

The process of treating wastewater begins with this phase. To ensure that all wastewater is collected and sent to a single location, collection systems are set up by the municipal government, households, and business owners.

Keep in mind that the wastewater gathered here consists mostly of water used, for daily tasks like washing dishes, bathing, and doing laundry. Using subsurface drainage systems or exhauster tracks owned and run by businesses, this water is collected and then routed to a wastewater treatment facility.

2: Odour Control

Odour management at the treatment facility is crucial, to put it mildly. Wastewater is full of filthy elements that eventually give off a bad odour. At the treatment facility, odour treatment procedures are started in order to guarantee that the surrounding areas, are free of the offensive stench.

Chemicals are used to contain all odour sources and treat them in order to eliminate the ingredients, which cause bad odours. It is crucial since it is the initial step in the wastewater treatment process.

3: Screening

The process of treating wastewater continues at this stage. Large things that could in some way harm the equipment are removed during screening.

Machine and equipment issues persist if this step is not followed. Grit that is typically swept down into the sewer systems by rains, is removed using equipment that has been specially developed for the job. After being separated from the wastewater, the solid waste is subsequently carried out and disposed of in landfills.

4: Primary Treatment

The macrobiotic solid materials must be separated from the wastewater in this process. The wastewater is first treated by being poured into large tanks, where the solids are allowed to settle to the surface.

5: Secondary Treatment

The secondary treatment stage, sometimes referred to as the activated sludge process, adds seed sludge to the wastewater to guarantee that it is further broken down. In order to mix the wastewater and seed sludge, which is essentially a small amount of sludge, air is first fed into large aeration tanks.

This process promotes the growth of bacteria that use oxygen as well as other small microorganisms, which eat the residual organic matter. Large particles produced as a result of this process collect in the bottom of the enormous tanks. The enormous tank allows the effluent to pass through for 3-6 hours.

6: Biosolids management

Digesters are used for the solid waste that settles out after primary and secondary treatment stages. The digesters receive ambient heating. After that, the solid wastes are handled for a month using anaerobic digestion.

Methane gases are created during this process, and nutrient-rich bio-solids are formed, which are then recycled and dewatered into nearby businesses.

At the treatment plants, the methane gas that is produced is typically used as a source of energy. It can be used to simply power plant machinery or to generate electricity for engines. Additionally, this gas can be utilized in boilers to produce heat for digesters.

7: Tertiary Treatment

This stage, which prepares raw water for drinking, is comparable to the one utilized by drinking water treatment facilities. Up to 99 percent of the pollutants in the wastewater can be eliminated at the tertiary treatment stage.

As a result, the effluent water is nearly of drinking water grade. Because it involves specialized equipment, highly qualified equipment operators, chemicals, and a consistent energy source, this process is unfortunately somewhat expensive.

8: Disinfection

There are still some disease-causing organisms in the treated wastewater after the first treatment stage, and the secondary treatment procedure.

The effluent must be disinfected for at least 20 to 25 minutes in tanks, containing a solution of chlorine and sodium hypochlorite to get rid of them.

9: Sludge Treatment

To permit further processing, the sludge that is created and collected during the main and secondary treatment procedures, needs to be concentrated and thickened. It is placed in tanks that thicken the liquid so that it can settle, and later separate from the water.

Up to 24 hours may pass throughout this process. The residual water is gathered and returned to the enormous aeration tanks, for additional processing. Following treatment, the sludge is released back into the environment, where it can be used for agriculture.

What do we offer?

Since, wastewater composition varies, specialized wastewater management is required. Every project is different, and our experts at Netsol Water Solutions will assist you in selecting the most effective technique, for treating wastewater.

We combine cutting-edge technology with years of experience to handle the most challenging water treatment, or wastewater treatment requirements of a wide range of clients, including small enterprises, corporations, and regional government agencies. 

Netsol Water is Greater Noida-based leading water & wastewater treatment plant manufacturer. We are industry's most demanding company based on client review and work quality. We are known as best commercial RO plant manufacturers, industrial RO plant manufacturer, sewage treatment plant manufacturer, Water Softener Plant Manufacturers and effluent treatment plant manufacturers. Apart from this 24x7 customer support is our USP. Call on +91-9650608473, or write us at enquiry@netsolwater.com for any support, inquiry or product-purchase related query.