Trends in Green Chemistry Open Access

Biological nutrient removal: The effect of organic load

Joint Event: 5^th International Conference on Green Chemistry and Technology & 6^th International Conference on Environmental Chemistry and Engineering

July 24-26, 2017 Rome, Italy

Tea Sirac, Ana Mikulin, Ana Spehar and Tibela Landeka Dragicevic

University of Zagreb, Croatia
Agroproteinka, Croatia

Posters & Accepted Abstracts: Trends in Green chem

Abstract:

Biological Nutrient Removal (BNR) of nitrogen and phosphorus has been widely used in wastewater treatment practice to control eutrophication in receiving water bodies. The most widely used nitrogen removal methods are biological nitrification (aerobic transformation of NH4-N to NO2-N and NO3-N), and denitrification methods (anoxic reduction of NO3-N to N2). Simultaneous nitrification-denitrification process (SND), in compare to conventional biological nitrogen removal process, can offer several advantages including reducing carbon source and alkalinity consumption, low energy consumption, high nutrients removal efficiencies, and simplifying the treatment system. P removal is achieved through Enhanced Biological Phosphorus Removal (EBPR) under alternating anaerobicâ�?�?aerobic conditions. Biological nutrient removal (N and P) in batch anoxic experiments was investigated. The initial concentration of P and N were 10-18 mg PO43â�?�?P/L and 48�?±2 mg NH4+- N/L. Sodium acetate was used as carbon source, at C/N 1 to C/N 7. Results indicated that the increase of C/N ratio improved efficiency of N removal in a range from 14.3 % at C/N 1 to 89,7 % at C/N 7. And also, the highest P removal of 61% was achieved at C/N 4. Nutrient removal was achieved by simultaneous nitrification and denitrification, and phosphorus removal.

Biography :

Tea Širac graduated from Faculty of Food Technology and Biotechnology at the University of Zagreb in 2016. She is a Master of Molecular Biotechnology. From 2017. she has been working at Faculty of Food Technology and Biotechnology as a Scientific Assistant in a Laboratory for the Biological Wastewater Treatment. Tea has been participant at IWA MEWE 2016 in the field of Microbial ecology in aerobic granular sludge processes, and at 16th Ru�?¾i�?ka days within the topic: Environmental Protection.

Email: tsirac@pbf.hr