She had been employed by several private enterprises for quality systems design, operation and auditing. Gesthimani Lionta was an MSc Chemical Engineer, working at the Laboratory of Water Technology at TEI Thessaloniki. He has been involved in 8 research projects and has contributed to the publication of more than 22 papers in scientific journals. Notes on contributorsĬostas Tsioptsias is a Dr Chemical Engineer, postdoc researcher at the Laboratory of Water Technology at TEI Thessaloniki, with expertise on green chemistry processes and biological wastewater treatment techniques.
Investing in knowledge society through the European Social Fund. This research has been co-financed by the European Union (European Social Fund – ESF) and Greek national funds through the Operational Program ‘Education and Lifelong Learning’ of the National Strategic Reference Framework (NSRF) – Research Funding Program: ARCHIMEDES III. A decrease in the photobioreactor performance was observed after 35 days of operation due to biofilm formation on the light tube surface, while the operation at higher temperature accelerated microalgae growth, resulting thus in the early failure of the photoreactor. The mechanism of nitrogen removal included both the denitrification process during the anoxic stage and the microalgae activities, as the replacement of the anoxic stage resulted in low total nitrogen removal capacities. Lower COD removal was observed for the photo-bioreactor than the control, which however increased, by the replacement of the anoxic phase by a long aeration period. The transformation of the nitrogen forms in the photo-bioreactor was attributed to microalgae activity, resulting in the production of a better quality effluent. A reduction in the ammonium and nitrate content was observed in the photo-bioreactor, while the effluent’s total nitrogen consisted mainly of 50% organic nitrogen. The microalgae treatment of molasses wastewater mixture resulted in a considerable reduction in the total nitrogen content. The systems used included a sequencing batch bioreactor and a similar photo-bioreactor, favoring microalgae growth. The aim of this work was the examination of the treatment potential of molasses wastewater, by the utilization of activated sludge and microalgae.
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