Analysis on methods of phosphorus removal in wastewater
Le, Anh (2020)
2020
All rights reserved. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2020121729385
https://urn.fi/URN:NBN:fi:amk-2020121729385
Tiivistelmä
One of the most severe problems in the aquatic environment is the eutrophication phenomenon re-sulted from the excess amount of phosphorus and nitrogen compounds which can come from the release of wastewater into environment. Therefore, there is a need for removing these phosphorus and nitrogen compounds from wastewater before being discharged into the environment.
The aim of this thesis is to analyze the efficiency of using iron salts and magnesium salt in phospho-rus removal in raw municipal wastewater (influent), biologically treated wastewater (effluent) and sludge water after anaerobic stabilization. The experiments were aimed at obtaining information not only about phosphorus removal, but also about the side-effects of precipitation (NH4-N, COD re-moval efficiency). For precipitating phosphorus in wastewater, the following coagulant agents are used: solution of 40% Fe3+ and 40% mixture of Fe3+ and Al3+. In the case of sludge water, Fe3+, Fe3+/Al3+ and Mg2+ was used.
The aim of this thesis is to analyze the efficiency of using iron salts and magnesium salt in phospho-rus removal in raw municipal wastewater (influent), biologically treated wastewater (effluent) and sludge water after anaerobic stabilization. The experiments were aimed at obtaining information not only about phosphorus removal, but also about the side-effects of precipitation (NH4-N, COD re-moval efficiency). For precipitating phosphorus in wastewater, the following coagulant agents are used: solution of 40% Fe3+ and 40% mixture of Fe3+ and Al3+. In the case of sludge water, Fe3+, Fe3+/Al3+ and Mg2+ was used.