Greentech Lead America: Linde North America has announced
a new environmentally friendly gas treatment system that can efficiently
control pH, biological oxygen demand (BOD), dissolved organics and odors in
water and wastewater treatment plants.
The gas injection systems will be featured at WEFTEC
2012 in New Orleans, October 1-3. The system includes oxygen (O2), ozone
(O3) and carbon dioxide (CO2) gas-dissolution systems that can significantly
improve treatment process efficiencies while helping customers meet
environmental requirements — often at a lower cost than existing treatment
methods.
The water treatment technology finds best use in dairy and
beverage, meat and poultry, pulp and paper, textiles and dyeworks; as well as
prepared foods, laundry, cement, desalination and chemical processing
industries.
The gas injection system works on SOLVOX process,
which offers an effective supplement or replacement to forced air systems.
Since air is only 21 percent oxygen, the SOLVOX oxygenation process can be
almost 5 times more efficient. Oxygen use can also save energy required for
compressors in high-volume aeration systems.
SOLVOCARB process is an economical way to neutralize
alkaline wastewater with a high degree of control using CO2. When dissolved in
water, CO2 forms carbonic acid to quickly reduce pH to appropriate levels
for discharge.
Carbon dioxide is an inert gas and mild buffering agent,
providing a much safer alternative to hazardous and corrosive mineral acid treatments,
such as sulfuric acid (H2SO4). CO2 gases are also important to reverse
osmosis (RO) and remineralization systems.