Control of Struvite (MgNH4 PO4 .6H2O) Scale Deposit in an Industrial Process

Luluk Edahwati (Department of Mechaninal Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)
Sutiyono (Department of Chemical Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)
Radissa Dzaky Issafira (Department of Mechaninal Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)
Ndaru Adyono (Department of Mechaninal Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)
Wiliandi Saputro (Department of Mechaninal Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)
Wahyu Dwi Lestari
Ahmad Khairul Faizin (Department of Mechaninal Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)
Tria Puspa Sari (Department of Mechaninal Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Surabaya 60294 Indonesia)

Nusantara Science and Technology Proceedings
2nd International Conference Eco-Innovation in Science, Engineering, and Technology

Struvite or Magnesium Ammonium Phosphate Hexahydrate (MgNH4 PO4.6H2O) is one of the precipitates generally formed in the piping system. The formation of struvite in the piping system is one of the serious problems that can cause blockages, reduced flow volume, and pipe diameter to increase maintenance and production costs. This formation of struvite scale in the industrial instrument is detrimental; however, struvite can be used as raw material for slow-release fertilizers. This study will observe the effect of pH in the range of 8, 8.5, 9, 9.5, and 10 on the formation of struvite compositions, consisting of Mg, NH4, PO4, Ca, and K in the surrounding temperature of 35oC. The results of this study will be observed using visual MINTEQ software. The result shows that the most suitable pH for struvite formation is 9.5.