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Preface
Table
of Contents
Foundation
Hybrid
Lagoon System
Case
Study
Applications
Proposals
1. Origins of the Activated Sludge Treatment Method.
The activated sludge treatment method (employing suspended microorganisms) has been in use throughout the world since its invention in Great Britain at the beginning of the 20th century. On considering the development of technology for use in activated sludge treatment, we may note a number of important milestones.
Establishment of the biological explanation of activated sludge as consisting of microorganisms.
Establishment of engineering for continuous waste water treatment facilities:
Method for calculating capacities of biological reaction basins;
Method for calculating amount of oxygen required:
Method for calculating water area load in sludge separation basin;
Method for calculating amount of sludge returned.
Establishment of technology for high-speed high-load processing, and other advances.
Recognition of the fact that the essence of activated sludge is microorganisms, and the establishment of the standard activated sludge treatment method, represent highly important events in human history.