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Although developments in wastewater treatment over recent decades
have focused on the biological reactor, the secondary settling tank
(SST) also plays a major role in achieving increasingly stringent
effluent quality standards. This report collates many of the
significant developments that have taken place in SST theory,
design, modelling and operation. Earlier SSTs were designed only by
empirical hydraulic criteria such as overflow rate, which do not
recognize sludge concentration and settleability. Today, there are
available not only much improved design procedures but also
hydrodynamic models for simulating water and solids distribution
and flows in full-scale SSTs. Nine chapters cover a wide range of
subjects including: Flocculation and settling behaviour of
biological sludges SST performance evaluation protocols Development
and evaluation of the different design procedures such as the flux
theory and the ATV design rules Developments in and application of
one- two- and three-dimensional modelling Experience-based aspects
of design and operation of circular, rectangular and vertical SSTs.
Reprinted for 2006 Scientific and Technical Report No.6
Advances in Wastewater Treatment presents a compendium of the key
topics surrounding wastewater treatment, assembled by looking at
the future technologies, and provides future perspectives in
wastewater treatment and modelling. It covers the fundamentals and
innovative wastewater treatment processes (such as membrane
bioreactors and granular process). Furthermore, it focuses
attention on mathematical modelling aspects in the field of
wastewater treatments by highlighting the key role of models in
process design, operation and control. Other topics include: *
Anaerobic digestion * Biological nutrient removal *
Instrumentation, control and automation * Computational fluid
dynamics in wastewater * IFAS systems * New frontiers in wastewater
treatment * Greenhouse gas emissions from wastewater treatment Each
topic is addressed by discussing past, present and future trends.
Advances in Wastewater Treatment is a valid support for
researchers, practitioners and also students to have a frame of the
frontiers in wastewater treatment and modelling.
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