6Schulze-Rettmer R. The simultaneous chemical precipitation of ammonium and phosphate in the form of magnesium-ammonium phosphate. Wat. Sci.Tech., 1997, 23:659 - 667.
7Miecczysla B. Recovery of Ammonium and Nitrate Ions from Wastewater and Their Conbersion to Mineral Fertilizers [J]. CA,1990, 113(2):190 339.
8Shin I S, Lee S M. Removal of nutrients in wastewater by using magnesium salts[J]. Env Technol, 1997,19(3):283-290.
9Olcay Tünay Isik Kabdasli, Derin Orhon, Saadettin Kolcak. Ammonia removal by magnesium ammonium phosphate precipitation in industrial wastewaters [J ]. Wat Sci Tech, 1997,36 (2-3) : 225 -228.
10Siegrist H. Nitrogen removal from digester supernatant-comparison of chemical and biological methods[J]. Wat Sci Tech, 1996, 34(1-2):399-406.
