Dear Lara, The choice of ...
Published by Prem Baboo, Researcher at www.researchGate.net
Dear Lara,
The choice of treatment process depends upon the volume to be treated, available space, costs of construction and quality of the discharge required. - it depends on the price/availability of land. If there is insufficient land for activated sludge, or if the discharge quality requirements are so tight that it makes economic sense, processes like membrane bioreactors are used, but at the expense of higher capital and operating costs.
Some cheaper operations are following
- Trickling Filters,
- RBC
Activated sludge is also better if there is a requirement to remove nitrogen from the wastewater, since trickling filters can't provide the anoxic conditions needed to remove nitrates. Constructed wetlands are treatment systems that use natural processes involving wetland vegetation, soils, and their associated microbial assemblages to improve water quality. These systems can be used commercially for efficient biological treatment of wastewater, and it will also act as a better eco-friendly method when compared with other conventional treatment methods. Natural wetlands, marshes, swamps, and bogs play an important role in protecting water quality. Constructed or artificial wetland systems mimic the treatment that occurs in natural wetlands by relying on plants and a combination of naturally occurring biological, chemical, and physical processes to remove pollutants from the water. Because constructed wetland systems are designed specifically for wastewater treatment, they typically work more efficiently than natural wetlands. Some constructed wetland system designs can closely resemble natural wetlands enough to provide additional habitat areas for many birds, animals, and insects that thrive in wetland environments.
Regards,
Prem Baboo