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Conversion of Organic Carbon in Food Processing Wastewater to Photosynthetic Biomass in Photo-bioreactors Using Different Light Sources
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  • Journal title : Environmental Engineering Research
  • Volume 19, Issue 3,  2014, pp.293-298
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2014.S1.009
 Title & Authors
Conversion of Organic Carbon in Food Processing Wastewater to Photosynthetic Biomass in Photo-bioreactors Using Different Light Sources
Suwan, Duangkamon; Chitapornpan, Sukhuma; Honda, Ryo; Chiemchaisri, Wilai; Chiemchaisri, Chart;
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An anaerobic photosynthetic treatment process utilizing purple non-sulfur photosynthetic bacteria (PNSB) was applied to the recovery of organic carbon from food processing wastewater. PNSB cells, by-product from the treatment, have high nutrition such as proteins and vitamins which are a good alternative for fish feed. Effects of light source on performance of anaerobic photosynthetic process were investigated in this study. Two bench-scale photo-bioreactors were lighted with infrared light emitting diodes (LEDs) and tungsten lamps covered with infrared transmitting filter, respectively, aiming to supply infrared light for photosynthetic bacteria growth. The photo-bioreactors were operated to treat noodle-processing wastewater for 323 days. Hydraulic retention time (HRT) was set as 6 days. Organic removals in the photo-bioreactor lighted with infrared LEDs (91%-95%) was found higher than those in photo-bioreactor with tungsten lamps with filter (79%-83%). Biomass production in a 150 L bench-scale photo-bioreactor was comparable to a 8 L small-scale photo-bioreactor in previous study, due to improvement of light supply efficiency. Application of infrared LEDs could achieve higher treatment performance with advantages in energy efficiency and wavelength specifity.
Anaerobic photosynthetic process;Food processing wastewater;Infrared light emitting diode (LED);Photo-bioreactor;Purple non-sulfur bacteria (PNSB);
 Cited by
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