I found this great article from Samsco Corp
http://www.samsco.com/information-samsco-evaporation-initial-steps.html
There are two initial steps that companies can take to help reduce their
wastewater volumes:
- Generate less wastewater by better controlling manufacturing processes.
- Recycle the process/manufacturing waters, if cost-effective and practical.
1. Generate Less Wastewater
Companies should focus on controlling manufacturing variables that can directly
reduce wastewater generation. But there is a caveat: manufacturers should be careful that their
waste-reduction effort does not create critical and negative manufacturing issues nor erode product quality (produce rejects). The pursuit of environmental compliance should not become the "disposal tail that wags the production dog".
2. Recycling
Recycling is potentially a good approach for
reducing wastewater volumes and, when appropriate, reusing process chemistries. This is often the preferred method when handling large volumes of wastewater or when the new process chemistry is expensive.
Traditional methods of recycling can often be time consuming and expensive. In addition, traditional efforts can often generate "out-of-spec" water that is not reusable or dischargeable (see Issues to Consider, for other concerns).
The Samsco WasteSaver™ Vacuum Evaporator and the
Samsco EnviroStill Mechanical Vapor Recompression (MVR) evaporator now offer a better alternative to traditional recycling methods.
These technologies produce "distilled water" that typically exceeds most incoming city water specifications. In addition, the concentrated chemistry can often be reused because the process is conducted under vacuum at a relatively low temperature.
For more information see
The WasteSaver Vacuum Evaporator and
The EnviroStill MVR Evaporator .
Issues to Consider
Heavy commitment to the daily management of wastewater chemistry
- Time
- Discipline
- Manpower
- Training
- Cost
Even if all recycling conditions are consistently met:
- Endpoint of the chemical life of process waters is inevitable
- Spent process waters still require a disposal plan and methodology (typically hauling off-site or evaporation)
- Method is inflexible and cannot handle multiple, varying waste streams
Poly Products has introduced a new Poly Products Corro-Fan™. This is a great Tube Axial Fan for any application where corrosive air needs to be moved.
