Lucas Botero under the direction of the Municipal Design Subcommittee of the
Technical Practice Committee in which 30 more water professionals helped review
the manuscript before its publication. The work of these volunteers is especially
noteworthy because grit sampling and characterization are small, narrow subjects,
which are normally ignored by engineers and managers.
In this publication, the currently used grit sampling and characterization methods
are introduced and reviewed, and modeling and expectations are discussed.
The book consists of four chapters. Chapter 1 introduces the grit characteristics,
historical and current definitions of wastewater solids, and the roles of service
utilities, consulting engineers, testing companies, and grit removal equipment manufacturers. Chapter 2 describes the various methods and equipment used for
obtaining a grit sample, such as bucket sampling, single-point pumped sampling,
multiple-port vertical sampling, vertically integrated slotted sampling, manifold
pumped sampling, siphon cross-channel sampling, and complete influent mixing/
sampling. Chapter 3 covers various methods for pretreatment, solids determination,
settling velocity determination, grit particle size and shape analysis, and calculations.
Chapter 4 focuses on international practices, design/operational expectations, grit
characterization modeling, and future expectations.
This book is meant for utility owners, consulting engineers, and grit equipment
manufacturers who want to understand the implications and selection of a grit
sampling and characterization method for proper grit chamber design and grit
removal optimization. The book is not intended to address various types of grit
removal equipment and grit slurry processing equipment, evaluate the equipment
performance, or discuss the grit removal and slurry processing costs.
For further improvement of this excellent publication, practical examples should
be added in Chapter 3, Section 5 “Calculations,” so licensed wastewater operators
with a high school education can be included as intended readers. Normally,
operators at a resource recovery facility will operate the grit chambers and take
grit samples for analysis.
3 Activated Sludge and Nutrient Removal, Manual
of Practice No. OM-9, Third Edition (2018). Water
Environment Federation (WEF), 601 Wythe Street,
Alexandria, VA 22314-1994, USA, 450 pp., $125,
softcover, ISBN: 978-1-57278-340-9.
This extensively revised third edition of Activated Sludge and Nutrient Removal,
Manual of Practice No. OM-9, reflects best practices and the latest advances. This is
one of the best books ever published by WEF. The book is not only a primary
reference for the design and operation of the activated sludge process but also an
414
L. K. Wang and M.-H. S. Wang
Technical Practice Committee in which 30 more water professionals helped review
the manuscript before its publication. The work of these volunteers is especially
noteworthy because grit sampling and characterization are small, narrow subjects,
which are normally ignored by engineers and managers.
In this publication, the currently used grit sampling and characterization methods
are introduced and reviewed, and modeling and expectations are discussed.
The book consists of four chapters. Chapter 1 introduces the grit characteristics,
historical and current definitions of wastewater solids, and the roles of service
utilities, consulting engineers, testing companies, and grit removal equipment manufacturers. Chapter 2 describes the various methods and equipment used for
obtaining a grit sample, such as bucket sampling, single-point pumped sampling,
multiple-port vertical sampling, vertically integrated slotted sampling, manifold
pumped sampling, siphon cross-channel sampling, and complete influent mixing/
sampling. Chapter 3 covers various methods for pretreatment, solids determination,
settling velocity determination, grit particle size and shape analysis, and calculations.
Chapter 4 focuses on international practices, design/operational expectations, grit
characterization modeling, and future expectations.
This book is meant for utility owners, consulting engineers, and grit equipment
manufacturers who want to understand the implications and selection of a grit
sampling and characterization method for proper grit chamber design and grit
removal optimization. The book is not intended to address various types of grit
removal equipment and grit slurry processing equipment, evaluate the equipment
performance, or discuss the grit removal and slurry processing costs.
For further improvement of this excellent publication, practical examples should
be added in Chapter 3, Section 5 “Calculations,” so licensed wastewater operators
with a high school education can be included as intended readers. Normally,
operators at a resource recovery facility will operate the grit chambers and take
grit samples for analysis.
3 Activated Sludge and Nutrient Removal, Manual
of Practice No. OM-9, Third Edition (2018). Water
Environment Federation (WEF), 601 Wythe Street,
Alexandria, VA 22314-1994, USA, 450 pp., $125,
softcover, ISBN: 978-1-57278-340-9.
This extensively revised third edition of Activated Sludge and Nutrient Removal,
Manual of Practice No. OM-9, reflects best practices and the latest advances. This is
one of the best books ever published by WEF. The book is not only a primary
reference for the design and operation of the activated sludge process but also an
414
L. K. Wang and M.-H. S. Wang