If you are looking for specific concepts without buying the full text, consider these open resources:

Methods of anaerobic sludge digestion, thickening, and drying beds.

Check platforms like National Digital Library of India (NDL) or Internet Archive , which sometimes host older editions for educational viewing.

: Detailed methodologies for estimating sewage discharge and the hydraulic design of sewers, focusing on maintaining self-cleansing velocities. Wastewater Treatment

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The book provides detailed explanations of the concepts, along with numerous examples, illustrations, and design problems. The text is written in a clear and concise manner, making it easy for students and professionals to understand and apply the concepts.