Sasikunya Cheuyglintase

Doctor of Philosophy, (Soil Science)
Study Completed: 2019
College of Sciences


Thesis Title
Removal of dissolved reactive phosphorus from municipal and dairy factory wastewater using Allophanic soils

Read article at Massey Research Online: MRO icon

Phosphorus (P) is a key nutrient responsible for eutrophication through which the pristine condition of surface water is lost. An abundance of Allophanic soil with high P sorption capacities is located in the central North Island of New Zealand. Ms Cheuyglintase evaluated this Allophanic soil in laboratory and performed pilot-scale soil filtration experiments aimed at removing P from municipal and dairy factory wastewaters. To enhance the soil's P removal capacity, other operational conditions were also investigated including acidification of wastewater pH and sieving of soil particles. The exhausted phosphorus-saturated Allophanic soil was further applied as fertiliser to perennial ryegrass under glasshouse conditions to investigate its agronomic value. By quantifying the Allophanic soil's P sorption capacities under laboratory and field conditions, Ms Cheuyglintase's research contributes to a better understanding of important design parameters of full-scale soil-based treatment systems.

Dr James Hanly
Professor David Horne