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Publikācija: Characterisation of a Ceramic Carriers after Wastewater Treatment Process in the Model Column Cascade with Ethanol Addition

Publication Type Scientific article indexed in ERIH database, in INT1 or INT2 category journals
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Characterisation of a Ceramic Carriers after Wastewater Treatment Process in the Model Column Cascade with Ethanol Addition
Field of research 2. Engineering and technology
Sub-field of research 2.11 Other engineering and technologies
Authors Andrejs Bērziņš
Zaiga Petriņa
Vizma Nikolajeva
Ruta Švinka
Visvaldis Švinka
Silvija Strikauska
Olga Muter
Keywords Removal of nitrogen, wastewater, ceramic pellets, ethanol
Abstract Nitrogen and phosphorus removal from wastewater remains one of the serious environmental problems worldwide. The present study was aimed at combining the both nitrification and phosphorus accumulation processes in the laboratory-scale model system. Synthetic wastewaters (28 mg N-NH4+ L-1) were treated consequently in the cascade of three columns, which were designed for nitrification and phosphorus accumulation processes, respectively, and were packed with porous ceramic beads. Six treatment cycles of seven days in each column were performed. Addition of 3% ethanol to wastewater increased the efficiency of ammonium removal in the first column of the cascade during the 7 day period to 81.9 %, which was accompanied by a decrease of pH from 7.3 to 6.2. An increase of soluble phosphates was shown in Columns II and III of the cascade. Microbial enzyme activity, number of CFU and diversity of the microbial community differed among the three columns tested. The most active biofilm formation was detected in Column I. The thermal analysis of beads has revealed mass losses of 0.23% and 0.08%, due to decomposition of light volatile organic substances at 173 °C and 481 °C, respectively. In turn, the beads in Column II and III were not covered by thick biofilm, while blue crystals were found on the surface. Accumulation of nitrogen and phosphorus on the beads was detected. Vegetation experiments have revealed some stimulation effect of the beads applied as an amendment to loamy sand soil, to the growth of rye and cress.
DOI: 10.2174/1874070701509010076
Hyperlink: http://benthamopen.com/ABSTRACT/TOBIOTJ-9-76 
Reference Bērziņš, A., Petriņa, Z., Nikolajeva, V., Švinka, R., Švinka, V., Strikauska, S., Muter, O. Characterisation of a Ceramic Carriers after Wastewater Treatment Process in the Model Column Cascade with Ethanol Addition. The Open Biotechnology Journal, 2015, Vol.9, pp.76-84. ISSN 1874-0707. Available from: doi:10.2174/1874070701509010076
ID 21685