Wastewater Treatment
Wastewater treatment (Biological treatment) is the process of modifying or removing objectionable characteristics of wastewater such as its biological oxygen demand (BOD), chemical oxygen demand (COD), pH or any other contaminants to produce an effluent meeting effluent standards for discharge to the environment or made suitable for its intended use or re-use.
Treatment systems can be physical or chemical or biological in nature. The chemical treatment systems utilize a chemical addition along with screening, settling, dissolved air flotation and filtration. The biological treatment systems utilize aerobic and anaerobic bacteria in controlled conditions to perform the treatment. Often a combination of both physical/chemical and biological treatments are necessary depending on the system requirements.
The latest trend in biological treatment is the membrane bio-reactor or MBR.
Membranes are playing a greater role in current wastewater treatment systems and are the critical process in membrane bio-reactors.
Example includes a muni wastewater treatment plant wanting further treatment levels to render water suitable for spray irrigation on an agricultural field pumping by Watertronics & Lindsay irrigation.
Example: rainwater harvesting system is collecting rainwater and wants to incorporate greywater (sink/shower/laundry) and treat it for reuse in irrigation or toilet-flushing, we provide the wastewater treatment. Blackwater can be treated with the biological (membrane bio-reactor) treatment to produce an effluent that can be discharged back to the environment or its intended reuse purpose.
Golf example: Instead of irrigating golf courses with potable water, use the brackish well-water or treated wastewater to bring the water up to usage standards.