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CHAPTER 11

3D TRASAR™ Technologies

for Reliable Wastewater Recycling

and Reuse

2
1
1
3
Manish Singh , Ling Liang , Atanu Basu , Michael A. Belsan ,
3
G. Anders Hallsby , William H. Tripp Morris 3
1
Nalco Water India Ltd., Pune, India
2
Nalco (China) Environment Solutions Co. Ltd, Shanghai, China
3
Nalco Company, Naperville, Illinois, USA
11.1 INTRODUCTION
With the ever-increasing stress on water resources and increasingly stringent
regulatory norms on water consumption and discharge, industries are under
pressure to improve their water efficiency through reuse and recycling of
process effluents. However, recovery of these effluent streams is a rather
daunting task because the quality can have dynamic variations since it is
dependent on the production processes upstream of the effluent treatment
plants (ETPs). It is also a common practice in several industries to produce
batches of different products within the same production plant. Switching
from one batch to the other results in variation in the effluent quality and
hence adds to the complexity of treating the effluents with the same waste-
water treatment plant. Unlike the case of raw water treatment, where the
quality of incoming water (such as bore-well water or river water) constantly
stays within a certain specification, the case of industrial wastewater treat-
ment is often complicated because there is often little or no control on
the quality of the incoming wastewater to be treated. On the other hand,
for successful recycling of the treated water within the plant, its quality needs
to meet specified criteria. For example, if the treated wastewater is meant for
use as boiler makeup water, the treated water would need to meet that qual-
ity all the time irrespective of the variations that might affect it. The system
designs that allow a proactive response instead of a reactive response in such a
dynamic environment would have more operational success.
This chapter focuses on two technologies—3D TRASAR Technology
for Sugar and 3D TRASAR Technology for Membranes—that have been

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