Naslov
Interaction of zeolites and phosphate-accumulating bacteria in wastewaters

Autori
Hrenović, Jasna

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
3rd Workshop EUREKA E!4208 – Purewater / Margeta, K - Zagreb : M&M, 2010, 31-31

ISBN
978-953-6470-49-5

Skup
3rd Workshop EUREKA E!4208 – Purewater

Mjesto i datum
Zagreb, Hrvatska, 05.05.2010. - 06.05.2010

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
bacteria; zeolite; immobilization; wastewater

Sažetak
Phosphate contained in the wastewater can cause eutrophication when it is discharged into closed natural water bodies. The enhanced biological phosphate removal is preferred process of phosphate removal from wastewater. This process is based on the accumulation of soluble phosphate present in wastewater in the form of nonsoluble polyphosphate granule inside cells of bacteria, which therefore are called phosphate-accumulating bacteria (PAB). Currently attention is being drawn to the implementation of zeolites in the wastewater treatment process in order to achieve a higher efficiency of the phosphate removal from wastewaters. Depending on the type of zeolite, different interactions between material and PAB were observed. High siliceous natural clinoptilolite tuffs allow the immobilization of PAB on the surface of particles and increase the number of total PAB in wastewater. The improved phosphate removal from wastewater containing the natural clinoptilolite tuffs is a function of high concentration of metabolically active PAB. In spite, the low siliceous commercial synthetic zeolites LTA display the toxic effect against PAB at concentrations higher than 0.1 g/L, thus causing the failure of phosphate removal from wastewater. The toxic effect of zeolites LTA is explained by the hydrolytic dissolution and leaching of aluminosilicate molecules from material.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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