Programme - IWA

6
L E A D I N G - E D G E
Plenary Speakers
Algae Alchemy: Wastewater as Biofuel
Frank Rogalla, Aqualia, Spain
Frank Rogalla’s specialty is advanced treatment technology,
where he holds a handful of patents and was instrumental in
bringing high rate treatment systems to full scale for the first
time. The consortium he compiled and is leading, All-Gas,
is implementing one of the large EU projects to demonstrate
´Algae to Biofuel´ on a 10 ha scale. His talk will present details
of this and related similar projects.
Biologically Stable Water: from Concepts to Practice
Frederik Hammes, EAWAG, Switzerland
Frederik Hammes’ LET talk will deal with the topic of biological
stability of water - a term loosely used to describe the absence
of bacterial growth potential in engineered aquatic systems due
to nutrient limitation or inhibition from to disinfectants. The
presentation will explore the underlying principles governing
biological stability, and specifically how a broad and inclusive
conceptual and methodological approach allows for a better
understanding, improved monitoring and possible control
thereof.
What Wastewater? A Solid Solution to Scaling
Geert-Jan Witkamp, TU Delft, The Netherlands
Scale-up of the Aerobic Granular Sludge Technology
Bart de Bruin, Royal HaskoningDHV, The Netherlands
For true Zero Liquid Discharge operation, a final step involving
crystallisation of salts is required. As a cheaper alternative to
evaporative crystallisation, eutectic freeze crystallisation (EFC)
allows crystallisation of salts from concentrates with much less
corrosion issues and with a better up-scaling potential, yielding
highly pure water as ice. Industrial demonstrations at full continuous
200 L scale, experimental and design work as well as
cost calculations have been performed for a variety of salt
containing aqueous streams, including reverse osmosis
retentates ex horticultural water treatment. The presentation
will concretely address various aspects from technology to
business”.
Aerobic granulation is considered as the possible future standard
for industrial and municipal wastewater treatment and subsequently
research efforts are quickly developing in this field.
Recently, as an outcome of a concerted Dutch research and
development program, an aerobic granular sludge technology has
been scaled-up and implemented for the treatment of municipal
and industrial wastewater. This Nereda® technology is considered
being the first aerobic granular sludge technology applied at
full scale. During the presentation the various scale-up aspects
as well as the performance of various full-scale plants up to
capacities of 140,000 person equivalents will be presented.