Activated sludge process workshop manual
By: Training and Certification Section, Pollution Control Branch, Ministry of the Environment.
Edition: 5th ed., 2d rev. --
Publisher: Training and Certification Section, Ministry of the Environment
Published: 1978
Place of publication: Toronto
Language: eng
Number of pages: 206
Subjects: Sewage -- Purification -- Activated sludge process; Sewage disposal -- Ontario