Treatment of domestic wastewater by anaerobic denitrification: Influence of the type of support media on the production of extracellular polymer substances | Zendy

Youssef Salama | Zendy; Mohammed Chennaoui | Zendy; Aboubakr Sylla | Zendy; Mohammed Mountadar | Zendy; Mohammed Rihani | Zendy; Omar Assobhei | Zendy

Open Access

Treatment of domestic wastewater by anaerobic denitrification: Influence of the type of support media on the production of extracellular polymer substances

Author(s) -

Youssef Salama,

Mohammed Chennaoui,

Aboubakr Sylla,

Mohammed Mountadar,

Mohammed Rihani,

Omar Assobhei

Publication year - 2016

Publication title -

african journal of biotechnology

Language(s) - English

Resource type - Journals

ISSN - 1684-5315

DOI - 10.5897/ajb2014.14371

Subject(s) - pulp and paper industry , wastewater , hydraulic retention time , chemistry , denitrification , anaerobic exercise , chemical oxygen demand , extracellular polymeric substance , nitrate , anaerobic filter , polyvinyl alcohol , waste management , nitrogen , environmental science , environmental engineering , biofilm , organic chemistry , anaerobic digestion , methane , biology , physiology , genetics , bacteria , engineering

Eighteen Erlenmeyer flask containing six different support media [pozzolan, polyvinyl chloride1 (PVC1), polyvinyl chloride2 (PVC2), foam, polyethylene terephthalate (PET) and polystyrene (PS)] were subject to identical volumetric organic loadings and hydraulic retention time in treating synthetic protein ± carbohydrate waste. The objective was to examine the influence of support media on performance of anaerobic denitrification and retention and their resulting impact on system performance and failure. According to the results relative to every control support media, it was noticed that the best support media were the ones in PVC1 and PVC2, with successive reduction rates of 68.33 and 61.93% for chemical oxygen demand (COD), and 55 and 49% for nitrate. On the other hand, in two submerged anaerobic biofilter reactor packed with the support media of PVC1 and PVC2, the reactor with PVC1 media exhibited 89.93% COD and 78.75% nitrate removal efficiency attributable to its higher production of EPSp and EPSc. Key words: Wastewater, anaerobic biofilm, extracellular polymeric substances (EPS), extraction, support media.

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