Try these books;

Handbook of Water and Wastewater Microbiology

     Duncan Mara, Nigel J. Horan

Practical Atlas for Bacterial Identification, Second Edition

     D. Roy Cullimore

Standard Methods for Examination of Water and Wastewater

https://www.standardmethods.org/

Standard methods for examination of water and wastewater (APHA) and wastewater engineering: treatment and reuse by metcalf

Thanks a lot for your reply and everybody that will participate in this topic.

yours