The Design of Industrial Wastewater Treatment Plants

Our wastewater treatment services help reduce your costs and environmental impact.

design of industrial wastewater treatment plant

A wastewater treatment plant is a vital infrastructure that removes pollutants and other impurities from sewage and industrial waste. The process involves various subprocesses to ensure quality wastewater.

Design of an industrial wastewater treatment plant is an important task that requires significant experience and expertise from the engineering firm. It also depends on the characteristics of the wastewater and the customer requirements.


Unlike public wastewater treatment plants that handle domestic, household sewage, industrial wastewater typically has a much higher concentration of contaminants such as metals, organics and chemicals. These pollutants can interfere with the sewage plant’s operations and affect water quality in nearby streams, rivers and lakes.

We can help you save money and protect the environment with our cost-effective wastewater treatment solutions.

As a result, wastewater from these sources needs to be treated differently than domestic wastewater. This is often referred to as “pretreatment.”

Pretreatment can include physical, chemical or biological processes to reduce or remove the pollutants in the waste stream before discharging it to the municipal sewer system.

This is especially true for substances that cannot be reduced by traditional wastewater treatment methods such as ozone or adsorption. Other treatment options may include filtration, granulation, sludge dewatering and carbon supplementation.

Our team can help you reduce your costs and improve your environmental performance with our advanced wastewater treatment technologies.

The City of Irving’s Industrial Pretreatment Program is designed to protect the city’s wastewater collection system, treatment facilities and environment from uncontrolled toxic pollutants. We do this by enforcing local effluent limits, issuing permits and monitoring permitted industries.

Primary Treatment

Primary treatment is the first phase in turning wastewater into clean water that can be safely returned to a natural source. It removes solid materials that could damage equipment during secondary wastewater treatment and prepares the water for further filtration.

During primary treatment, the waste stream is treated by gravity and physical processes to remove substances that will float or settle in the water. Approximately 25 to 50% of the biochemical oxygen demand (BOD5), 50 to 70% of the total suspended solids (SS), and 65% of oil and grease are removed during this process.

Chemical disinfection, often using chlorine in contact basins, is typically added after primary treatment and is the main source of bacteriological control for most industrial wastewaters. However, ozone and UV irradiation can also be used in addition to chlorine for disinfection.

Secondary Treatment

Secondary treatment is a process that follows primary wastewater treatment to remove remaining organic matter and suspended solids from the water. This is a very important part of wastewater treatment and ensures that the water is clean enough to return to a natural water source.

In the secondary phase of wastewater treatment, bacteria are used to digest the remaining pollutants. They are able to do this by mixing the wastewater with oxygen. This increases the rate of their metabolism and helps them break down the remaining waste faster.

There are many different methods of secondary wastewater treatment. Some of these include activated sludge treatment and biofilters.

Activated sludge is the most common type of biological wastewater treatment method. This process uses bacteria to break down the waste and produce cleaner water that can be safely returned to the environment. It is also one of the most efficient and cost effective ways to treat wastewater. It is often the preferred method for many industrial facilities around the world.

Tertiary Treatment

After domestic, agricultural and industrial use, water undergoes treatment in a wastewater treatment plant to purify it for reuse or discharge into the environment. It is a multi-stage process that involves primary, secondary and tertiary treatment phases.

Primary treatment includes filtration, biofiltration and aeration, all processes that help to remove large particles from the wastewater. Secondary treatment focuses on biological and chemical processes that remove BOD and TSS, the two main solid contaminants in wastewater.

Bacteria in bioreactors or tanks can digest the contaminants in sewage, reducing them to harmless compounds such as nitrate, phosphate and ammonia. Some systems also have an ultraviolet light treatment, which sterilizes the bacteria and microorganisms that contaminate the wastewater.