Improving understanding of the chemical and biological nutrient removal mechanisms in existing wastewater lagoons

Autor:	Vendramelli, Richard Adam
Předmět:	Phosphorus removal wastewater stabilization ponds lagoon wastewater nitrogen removal
Popis:	Many rural communities in Manitoba use wastewater lagoons to treat sewage, but the nutrient removal process is not fully understood. This thesis’ purpose is to improve understanding of chemical and biological nutrient removal mechanisms of wastewater lagoon treatment and compare two different stabilization ponds – one aerated and one facultative. Samples were collected from stabilization ponds and analysed for a pond average. The facultative lagoon achieved overall ammonia-N removals similar to those of the aerated lagoon, and lower orthophosphate removals. Nitrogen appears to be removed by ammonia volatilization; and assimilation into biomass. Phosphorus appears to be removed by assimilation into biomass; and precipitation at alkaline pH. There appears to be nitrogen limiting conditions in the secondary cells of both stabilization systems based on nitrogen-phosphorus ratios. There does not appear to be any significant advantage between aerated or facultative lagoons; they will meet their ammonia limits, but will require additional phosphorus treatment. October 2016
Databáze:	Networked Digital Library of Theses & Dissertations
Externí odkaz:	http://hdl.handle.net/1993/31509 Zobrazit plný text záznamu