THE DOW CHEMICAL COMPANY
It has now been found that certain phosphonate derivatives of bis(aminoalkyl) piperazines are good threshold agents to prevent metal ion precipitation in aqueous solutions. They also function as sequestering and/or chelating agents as do those which d...
WATER ENGINEERING AND PLANT CONSTRUCTION GTA REG. TRUST
In a plant for the mechanical-biological treatment of sewage, an immersion element is rotatably mounted within a settling tank so that the element rotates about a horizontal axis. The immersion element includes a perforated outer tube and an inner tub...
PURPOSE:To prevent the propagation of bacteria in an adsorptive filter medium when the purifier is not used by impressing a specified voltage on the adsorptive filter medium. CONSTITUTION:A voltage of 1.5-27 V is impressed on the inside of an adsorpti...
A membrane separator wherein a substance is separated out by employing a semipermeable membrane to obtain either a dilute or a concentrated solution or both. The most economical operation of the membrane separator obtains a maximum amount of a desired...
The invention relates to the conversion of organic compounds present in liquid decomposition products into stable reaction products. It is very particularly suited for the treatment of waste water and sludge. In accordance with the invention the org...
The purifier has a drinking water reservoir (1), a circulating line (2) connected thereto for the drinking water, and an ozone feed line (7) which opens into the circulating line and is connected to an ozone generator (6), the purifier being designed ...