Q: What trends do you see in WWTP design and construction?
A: The regulatory community is imposing more stricter treatment criteria. Controlling and treating wet weather flow, as well as nutrient removal, are two main concerns driving these demands.
Wet weather peaks can soon surpass the system hydraulics or the safe biological treatment capacity, whether from combined sewers or leaky sanitary sewers. When employing standard bio-treatment to handle this problem, a contradiction emerges between too much tankage for a tolerable healthy biology during dry weather and too little tankage with the risk of biomass washout during the uncommon wet periods.
Additional biological treatment, as well as chemical precipitation and filtration, will be required to meet more rigorous nutrient limitations. Wet weather peaks make nutrient removal technology more sensitive. These characteristics suggest that new technology and more flexible solutions are needed to operate and protect the treatment plants in order to meet these more stringent wastewater infrastructure standards.
Q: What are the factors or issues that are causing these changes?
A: The Clean Water Act (CWA), the CSO Control Policy, and the "By-Pass Rule" are the regulatory drivers that mandate Publicly Owned Treatment Works (POTWs) to apply wet weather measures and are managed through the NPDES Permit Program.
The Bypass Rule has sparked one of the most heated debates in the last decade, with some interpreting it to mean that all flows must be biologically treated, putting many plants in violation of the CWA despite meeting permit limitations. Consent orders are driving CSO regulations, which necessitate changes at the wastewater plant and in the collecting system.
Many states have already enacted strict regulations, and the majority will do so in the future, necessitating modifications to wastewater treatment facilities' biological, physical and chemical treatment systems.
Q: How can your business react to these market changes in wastewater collection and/or treatment? Are you introducing, or have you recently introduced, any new or improved items, for example? Is there any special research and development that you're doing?
A: A company should be instrumental in the development of science-based studies and technology for the control and treatment of wet weather wastewaters and nutrients. These efforts result in the creation of a passive-type flow control device as well as a simple high-rate filtration technology that may be used at the POTW for a variety of purposes.
The use of a synthetic fiber media by the manufacturers of WWTPs,is squeezed laterally to create a porosity gradient that eliminates large and small particles of varied properties from the media bed's top to bottom.
The adaptability includes the following:
-Metal salt tertiary filtering produces reuse quality.
-When processing rainy weather flows, high-rate biological filtration captures and returns high solids overflow from secondary clarifiers.
-Secondary-type numeric criteria are produced through filtration.
-Sewage bio-filtration reduces both particulate and soluble BOD.
We at Netsol promise the adaptability of recent and reliable technology for the wastewater treatment services. Our teams work consistently to maintain the decorum and reputation earned. We serve the nature in every possible way and prove to be one of the leading manufacturers of wastewater treatment plants.