Possibilities of Phoslock® application to remove phosphorus compounds from wastewater treated in hybrid wetlands

Magda Kasprzyk; Hanna Obarska-Pempkowiak; Fabio Masi; Magdalena Gajewska

doi:10.1016/j.ecoleng.2018.07.020

Possibilities of Phoslock® application to remove phosphorus compounds from wastewater treated in hybrid wetlands

Abstract

Treatment wetland technologies for wastewater treatment can be easily applied for removal of all pollutants except phosphorous. They are applicable in a small towns and rural areas, places where conventional wastewater treatment plant cannot properly operate because of common economic constraints. In Poland only the 8% of rural areas are equipped with sewer system, thus treatment wetlands might be an alternative, effective and low- cost method to treat wastewater from households. The aim of this study was to optimise the operational parameters for Phoslock® application on treated wastewater and to prove that Phoslock® may also be success- fully used to remove phosphorus compounds from treated wastewater and possibly recover them. Phoslock® also known as lanthanum-modified bentonite (LMB) is an adsorbent material developed by the Land and Water Division of Australia’s CSIRO (Commonwealth Scientific and Industrial Research Organization). Experimental trials were carried out in the laboratory with batch reactors pilot units in three separate stages to establish sorption capacity of material, define characteristic constants of isotherms of adsorption and verify kinetic parameters by using pseudo-second order model. Carried out research confirmed high sorption capacity of LMB – Phoslock® for removal of phosphorous compounds from wastewater both synthetic and effluent from treatment wetland. Performed kinetic studies have shown that LMB is much less effective in case of real effluent from WWTP (2.09 mg/g) than in synthetic wastewater (4.31 mg/g). Langmuir and Freundlich adsorption models have shown relatively good matching of isotherms in graphical. Results obtained for kinetic studies have shown correlation coefficient close to 1.0 both for synthetic and effluent from WWTP. Application of LMB caused not only a rapid decrease of PO4 3−-P concentration, but also no other meaningful influence on the water solution was discovered.

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Authors (4)

Magda Kasprzyk dr inż.
Hanna Obarska-Pempkowiak prof. dr hab. inż.
Fabio Masi
- IRIDRA Srl
Magdalena Gajewska prof. dr hab. inż.

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Category:

Articles

Type:

artykuł w czasopiśmie wyróżnionym w JCR

Published in:

ECOLOGICAL ENGINEERING no. 122, pages 84 - 90,
ISSN: 0925-8574

Language:

English

Publication year:

2018

Bibliographic description:

Kasprzyk M., Obarska-Pempkowiak H., Masi F., Gajewska M.: Possibilities of Phoslock® application to remove phosphorus compounds from wastewater treated in hybrid wetlands// ECOLOGICAL ENGINEERING. -Vol. 122, (2018), s.84-90

DOI: