How are Industrial RO Plants used in tertiary treatment of wastewater?
Salts and other dissolved solids can be difficult to remove from wastewater. Standard filtration, as well as coagulation and sedimentation, have little effect on dissolved solids. These may reduce TDS to some extent, but in cases, where total dissolved solids (TDS) are especially high, additional treatment is required.
As a result, tertiary wastewater treatment using industrial reverse osmosis systems, will enable the safe and compliant discharge, or reuse of this wastewater stream.
Treatment of Industrial Wastewater: Usage of RO in tertiary wastewater treatment
· Textile Industries
The dyeing process in the textile industry necessitates the use of a large amount of pure water. Contaminants can damage the machines that are in use. Because, dissolved salts and dyes in wastewater can be difficult to eliminate using other methods, tertiary wastewater treatment using reverse osmosis is very popular in the textile industry.
· Food / Beverage Processing Industries
Water is a key component in many food and beverage products. It is also used during processing for cleaning, rinsing, and other similar tasks. Many of these applications, particularly as an ingredient, necessitate high-quality, if not potable, water. Utilizing tertiary wastewater treatment with reverse osmosis, dissolved solids and trace pollutants can be easily removed, allowing the wastewater to be reused.
· Oil / Gas Manufacturing Sector
Brine water, which has been trapped underground with oil and gas, is well known in oil fields. Lower salinity brines can be handled by standard treatments, but elevated TDS water cannot. Reverse osmosis is frequently used as a tertiary treatment to eliminate salts and other dissolved solids.
Water can then be used to extract more oil from the well, reused in irrigation or other non-potable uses, or safely discharged in some way. The RO process is typically inapplicable to water streams, with TDS levels greater than 47,500mg/l.
· Pulp / Paper industry
To produce a high-quality product, pulp and paper requires a large amount of high-quality water. It is advantageous for a manufacturing company to be able to reuse their wastewater, in order to lower costs and reuse it in processes that require a specific grade of water. Using an Industrial RO system for tertiary wastewater treatment can help with reuse.
· Power Plants
Water is used in power plants to generate steam, as well as, it is used in cooling towers. These systems are less efficient and have higher operational costs, when they lack clean water.
Power plant feed water frequently contains salts, hardness minerals, and other trace contaminants. Tertiary reverse osmosis can eliminate these contaminants, while keeping the boilers and cooling towers running smoothly. To reduce raw water usage, the wastewater generated by these can also be sent through the treatment, for tertiary wastewater treatment and reuse.
· Hotels and resorts
Hotels and resorts have really been treating grey water on-site for non-potable reuse. If they use reverse osmosis in a tertiary wastewater treatment stage, they could reuse grey water for other process water applications on their properties, or for potable water, if regulations permitted.
· Pharmaceutical sector
There has recently been increased concern about the potential effects of pharmaceuticals, on drinking water. This is due to pharmaceutical companies treating their wastewater in standard treatment facilities, which are not equipped to handle such small, complex compounds.
As a result, pharmaceutical industries have felt increased pressure to self-treat their wastewater, and to aid in this effort, industrial reverse osmosis has been used as a tertiary wastewater treatment step. After that, the treated water can be safely discharged.
· Metal manufacturing
The manufacturing of semiconductors and metals can result in the release of a few harmful,and difficult-to-treat pollutants into wastewater. Semiconductors, for example, are notorious for releasing PFAS into wastewater after production. In recent years, there has been much concern about PFAS, but reverse osmosis can eliminate nearly all traces of the chemical in wastewater.
TDS levels in wastewater are higher in some industries than in others. Whether, they want to safely discharge or reuse their wastewater, the high TDS levels make meeting disposal requirements difficult.
Netsol Water offers tertiary wastewater treatment, which includes Industrial RO Plants. If regulations allow, it may also allow municipalities and industries to recycle wastewater for potable use. Tertiary wastewater treatment with RO can be used in industrial applications, for streams with high TDS levels.