Kay Thi Khaing, Chongchin Polprasert and Suwisa Mahasandana 2022. Phosphorus Recovery from Anaerobic Co-Digestion of Waste Activated Sludge and Food Waste: Effect on Molar Ratio of Mg/Ca and Mg, Ca, Fe/P. International Journal of Scientific Research and Innovative Studies. 1, 1 (Jul. 2022), 1–6.