For many years YASA ET developed and installed various industrial effluent treatment systems and plants for treating any kind of wastewater by combining different treatment technologies.
Applications of such treatment systems and plants space from oily wastewater treatment for metalworking industry to chemical and pharmaceutical industry effluents.
If you want to learn more about our industrial treatment systems, technologies and applications, continue reading this informative article.
What Is an Industrial Wastewater Treatment System?
Most industrial processes, such as metalworking factories, chemical and petrochemical plants have their own specific wastewater treatment system to treat their industrial effluents so that the pollutant concentrations in the treated wastewater comply with the regulations regarding disposal into sewers or into rivers, lakes or oceans.
Industrial wastewater treatment describes the processes used for treating wastewater that is produced by industries as an undesirable by-product. After treatment, the treated industrial wastewater (or effluent) may be reused or released to a sanitary sewer or to a surface water in the environment. In the image below shows the three stages of a wastewater treatment system.
Primary, Secondary, and Tertiary Wastewater Treatment
Wastewater treatment can be divided into primary, secondary, and tertiary, depending on the technology used, the treatment methods employed, and treatment stages.
Primary Treatment of Wastewater
Primary treatment of wastewater involves treatment technologies that remove oil and particulates, such as gravitation, filtration, flotation and centrifugation. This is the first and often necessary step for treating wastewater.
Solids such as stones, grit, and sand may be removed from wastewater by gravity when density differences are sufficient to overcome dispersion by turbulence. This is typically achieved using a grit channel designed to produce an optimum flow rate that allows grit to settle and other less-dense solids to be carried forward to the next treatment stage. Gravity separation of solids is part of the primary treatment of sewage and is often performed by settling tanks or sedimentation tanks.
An efficiently operate primary treatment system typically removes 90% of settleable solids, 40 to 60% of suspended solids, and 20 to 40% of incoming biochemical oxygen demand (BOD).
Secondary Treatment of Wastewater
Secondary treatment is the removal of biodegradable organic matter (in solution or suspension) from sewage or similar kinds of wastewater. The aim is to achieve a certain degree of effluent quality in a sewage treatment plant suitable for the intended disposal or reuse option.
In industrial applications the treatment options to separate or “treat” the pollutants from water include ultrafiltration, chemical separation, evaporation or electrocoagulation treatment technologies.
Tertiary Treatment of Wastewater
Tertiary treatment of waste water is the final stage of the multi-stage wastewater cleaning process. This third stage of treatment completely removes inorganic compounds, bacteria, and viruses. Removing these harmful substances makes the treated water safe to reuse, recycle, or release into the environment.
The tertiary treatment of wastewater simply involves polishing and cleaning the effluent of secondary treatment technologies. The tertiary treatment of wastewater includes processes like filtration, ion exchange, activated carbon adsorption, electrodialysis, nitrification, and denitrification.
Example of an Industrial Wastewater Treatment System by YASA ET
In the following paragraphs we present the interesting example shown in the video of an industrial wastewater treatment system.
This system is made of primary, secondary, and tertiary treatment. In this application the initial COD of the waste water was reduced from 40000 to under 200 mg/L.
In this case, the treatment of metalworking fluids wastewater required a multi-stage treatment to reduce pollutants in the industrial effluents within legal limits. For this reason, YASA ET engineers designed an industrial wastewater treatment system by combining PREDEST electrocoagulation, EVADEST vacuum evaporator, and REWATER membrane filtration technology.
Electrocoagulation for Pre-treatment of Industrial Wastewater with PREDEST-EC Equipment
In many applications, electrocoagulation is used for the treatment and pre-treatment of industrial wastewater in industrial effluent treatment system.
Electrocoagulation (EC) is a technique for applying direct current to sacrificial electrodes that are submerged in an aqueous solution. EC is a straightforward and efficient technique to remove the flocculating agent produced by electro-oxidation of a sacrificial anode and generally made of iron or aluminium.
YASA ET developed PREDEST, an unique electrocoagulation equipment which uses metal rods instead of the classical metal plates. More information can be found by clicking here.
Secondary Treatment of Industrial Wastewater with EVADEST Vacuum Evaporators
In secondary treatment of industrial wastewaters, vacuum evaporators are among the most chosen technologies for treating industrial effluents.
In this case, the EVADEST vacuum evaporator was needed to achieve the requirements of Zero Liquid Discharge. The evaporator works on MVR technology which has lower energy consumption, low maintenance costs and more efficiency than traditional evaporators. More details can be found here or you can get in touch with our team.
The vacuum evaporator design developed by YASA ET guarantees high efficiency and low energy consumption.
Final Treatment of Industrial Effluent Wastewater by REWATER Membrane Filtration Technology
For the final stage of a wastewater treatment system often involves the installation of a membrane filtration equipment.
In many projects, YASA ET REWATER is the preferred choice for polishing the distillate from vacuum evaporators. By using this technology, the permeate can be reused in the production line.
This machine can be equipped with Reverse Osmosis (RO), Ultrafiltration (UF), Microfiltration (MF), and Nanofiltration (NF) membranes with pollutants reduction up to 99.9% in optimal conditions.
What Is the Best Treatment System for My Wastewater and Industrial Sewage?
The best treatment system for industrial wastewaters and sewage often involves various stages and technologies. The correct equipment needs to be selected and carefully manufactured to reach the optimal results.
The first step in designing a wastewater treatment system is to analyse the chemical composition and pollutants contained in the industrial effluent to be treated. Secondly, extensive testing needs to be undertaken to find the correct parameters for treating the specific wastewater. Finally, the right equipment for the treatment system can be manufactured and the system can be installed at the client site.
For the right treatment system, you need the right expertise. For more information about our wastewater treatment systems kindly get in touch at:
🌐 www.yashahuanjing.cn (中文）
📱 +86 136 3643 1077
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Primary Treatment of Wastewater
Wastewater Treatment. (2020). United States: CRC Press.
Removal of quinolone antibiotics from wastewaters and sewage sludge - ScienceDirect