Dear OvGU fellow Salman Amjad, thanks for posting this interesting technical question on RG. There are several review articles and books available about this topic available. I would recommend to have a look at the following articles:
PHOSPHORUS RECOVERY FROM WASTEWATER BY STRUVITE CRYSTALLISATION: A REVIEW
Phosphorus recovery from wastewater by struvite crystallization: Property of aggregates
Article Phosphorus recovery from wastewater by struvite crystallizat...
This paper is not freely available as public full text on RG. However, two of the authors have RG profiles. Thus you can easily contact one of them directly via RG and request the full text from him.
Also please check:
Phosphorus recovery from wastewater through struvite formation in fluidized bed reactors: a sustainable approach
These might also be of help to you, thought they are not books. You might find additional references therein. Good luck!
Guest JS, Skerlos SJ, Barnard JL, Beck MB, Daigger GT, Hilger H, Jackson SJ, Karvazy K, Kelly L, Macpherson L, Mihelcic JR, Pramanik A, Raskin L, Van Loosdrecht MCM, Yeh D, Love NG (2009) A New Planning and Design Paradigm to Achieve Sustainable Resource Recovery from Wastewater. Environ Sci Technol 43(16):6126-6130. https://doi.org/10.1021/es9010515
Hao X, Wang C, van Loosdrecht MCM, Hu Y (2013) Looking Beyond Struvite for P-Recovery. Environ Sci Technol 47(10):4965-4966. https://doi.org/10.1021/es401140s
Kozik A, Hutnik N, Piotrowski K, Mazienczuk A, Matynia A (2013) Precipitation and Crystallization of Struvite from Synthetic Wastewater under Stoichiometric Conditions. Advances in Chemical Engineering and Science 3:20-26. https://doi.org/10.4236/aces.2013.34B004
Kozik A, Hutnik N, Piotrowski K, Mazienczuk A, Matynia A (2014) Precipitation and crystallization of struvite from synthetic wastewater at the magnesium ions excess. Przemysl Chemiczny 93(5):756-761
Matynia A, Koralewska J, Głuchy A, Kwiecień J (2003) Strącanie Hydroksyapatytu I Struwitu z Wody Kopalnianej [Precipitation of Hydroxyapatite and Struvite from Mine Water]. Chemia i Inżynieria Ekologiczna 10(1-2):133-143