In 1991, after reviewing a number of approaches, ZENON determined that immersed
membranes would ultimately be the most cost effective and reliable technology for drinking
water treatment. Immersed membranes differ from pressurized membranes in that pressure
vessels are not used. Instead, shell-less hollow fibers are immersed into a tank open to the
atmosphere and a gentle suction is applied to draw clean water through the fibers. Through
the use of tanks open to the atmosphere, ZENON's immersed membrane technology
conforms to the normal manner that water plants are operated while saving the cost of
pressure vessels. Furthermore, through the use of low trans-membrane pressures (suction),
ZENON was able to minimize fouling.
Since 1991, ZENON has continually evolved new generations of immersed membranes. The
first four generations are referred to as ZeeWeed(R) 150 and ZeeWeed(R) 500 a, b, and c. These
membranes have been designed to handle water of almost any level of turbidity as well as
very high solids applications such as direct coagulant addition or filter backwash treatment.
The ZeeWeed(R) 1000 is ZENON's fifth generation of immersed membrane technology that
has been designed for low solids feed water with the primary focus of design on minimizing
life cycle costs. The ultrafiltration membrane used in the ZeeWeed(R) 1000 system has the
same membrane chemistry and absolute pore size as its predecessors and therefore also
removes suspended solids, protozoa, bacteria and viruses.
This paper examines the key product and operating features of the ZeeWeed(R) 1000 product.
Various designs and applications of the ZeeWeed(R) 1000 membrane are presented in this paper with
data from both pilot and full-scale operations.
Includes reference, tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 660 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 06/16/2002 |
