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Occurrence of sepiolite in Croatia and its application in phosphate removal from wastewater
Abstract Within the serpentine body near Gornje Oresje, Croatia sepiolite was found as alteration product of hydrothermal activity inside peridotitic rocks, developed as monomineral veins (10cm wide and up to few meters long). Sepiolite was tested for the immobilization of phosphate (P)-accumulating bacteria Acinetobacter junii under sterile (synthetic wastewater) and non-sterile conditions (effluent from the secondary stage of wastewater treatment). In sterile conditions the number of immobilized A. junii was 5.60×109 CFUg−1. The A. junii were successfully immobilized onto non-sterile sepiolite in the original effluent water and the prepared bioparticles contained 2.43×108 CFUg−1 of A. junii and 1.19×108 CFUg−1 of heterotrophs. After 24h of incubation of bioparticles in effluent water with P concentration adjusted to 20mgL−1, the number of immobilized A. junii increased to 6.64×109 CFUg−1. The P removal from effluent water was more efficient in a reactor with bioparticles (94.1%) than in a reactor with planktonic A. junii (73.5%).
Highlights ► Sepiolite was found in Croatia as monomineral veins. ► P-accumulating bacteria immobilized onto sepiolite under non-sterile conditions. ► Bioparticles, consisting of A. junii immobilized onto sepiolite, were prepared. ► Bioparticles were very efficient in P removal from secondary effluent. ► Presence of other heterotrophs did not disturb the performance of A. junii.
Occurrence of sepiolite in Croatia and its application in phosphate removal from wastewater
Abstract Within the serpentine body near Gornje Oresje, Croatia sepiolite was found as alteration product of hydrothermal activity inside peridotitic rocks, developed as monomineral veins (10cm wide and up to few meters long). Sepiolite was tested for the immobilization of phosphate (P)-accumulating bacteria Acinetobacter junii under sterile (synthetic wastewater) and non-sterile conditions (effluent from the secondary stage of wastewater treatment). In sterile conditions the number of immobilized A. junii was 5.60×109 CFUg−1. The A. junii were successfully immobilized onto non-sterile sepiolite in the original effluent water and the prepared bioparticles contained 2.43×108 CFUg−1 of A. junii and 1.19×108 CFUg−1 of heterotrophs. After 24h of incubation of bioparticles in effluent water with P concentration adjusted to 20mgL−1, the number of immobilized A. junii increased to 6.64×109 CFUg−1. The P removal from effluent water was more efficient in a reactor with bioparticles (94.1%) than in a reactor with planktonic A. junii (73.5%).
Highlights ► Sepiolite was found in Croatia as monomineral veins. ► P-accumulating bacteria immobilized onto sepiolite under non-sterile conditions. ► Bioparticles, consisting of A. junii immobilized onto sepiolite, were prepared. ► Bioparticles were very efficient in P removal from secondary effluent. ► Presence of other heterotrophs did not disturb the performance of A. junii.
Occurrence of sepiolite in Croatia and its application in phosphate removal from wastewater
Hrenovic, J. (author) / Gobac, Z. Zigovecki (author) / Bermanec, V. (author)
Applied Clay Science ; 59-60 ; 64-68
2012-02-24
5 pages
Article (Journal)
Electronic Resource
English
Occurrence of sepiolite in Croatia and its application in phosphate removal from wastewater
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