Continuous Enzymatic Prehydrolysis Treatment of High-Fat Wastewater
| Autor: | Franco Oliveira Zawadzki, Rodrigo Augusto, Prado, Marcelo Real, David Mitchell, Krieger, Nadia |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Food Technology and Biotechnology Volume 51 Issue 2 Food Technology and Biotechnology, Vol 51, Iss 2, Pp 293-300 (2013) ResearcherID |
| ISSN: | 1334-2606 1330-9862 |
| Popis: | Za obradu otpadnih voda bogatih mastima iz tvornice za preradu mesa i izradu kobasica u São José dos Pinhais, Paraná, Brazil korištena je lipolitička smjesa, proizvedena fermentacijom na čvrstoj podlozi od otpadaka šećerne trske i suncokretove pogače pomoću mikroorganizma Rhizopus microsporus CPQBA 312-07 DRM u bioreaktoru s nasutim slojem nosača. Ovim se načinom obrade pri hidrauličkom vremenu zadržavanja od 24 h smanjio udjel masti i ulja u otpadnim vodama čak i do 96 %, a povećao omjer petodnevne biokemijske potrošnje kisika i kemijske potrošnje kisika (BOD5/COD). Taj je omjer u uzorku netretiranih otpadnih voda bio samo 0,19, što je upućivalo na slabu biorazgradivost, no nakon obrade omjer je porastao na 0,55, što znači da se otpadne vode mogu pročistiti nakon tretmana pomoću aerobnih mikroorganizama ili aktivnog mulja. Mikrobiološkom je analizom potvrđeno da je R. microsporus bio aktivan u fermentiranoj smjesi čak i nakon 96 dana obrade u bioreaktoru. Rezultati pokazuju da se otpadne vode bogate mastima mogu uspješno pročistiti u protočnom bioreaktoru s nasutim slojem nosača koristeći smjesu fermentiranu s pomoću R. microsporus. A lipolytic fermented solid was produced by solid-state fermentation of Rhizopus microsporus CPQBA 312-07 DRM on a mixture of sugarcane bagasse and sunflower seed meal and used, in a packed-bed bioreactor, to pretreat a high-fat wastewater from a meat and sausage processing factory located in São José dos Pinhais, State of Paraná, Brazil. With a hydraulic residence time of 24 h, this pretreatment not only reduced the wastewater’s oil and grease content by up to 96 %, but also increased its 5-day biochemical oxygen demand to chemical oxygen demand (BOD5/COD) ratio. This ratio was only 0.19 in the raw wastewater, indicating poor biodegradability, but increased to 0.55 in the pretreated wastewater, indicating that it had a sufficiently high biodegradability to be sent to a traditional anaerobic digestion or activated sludge process. After 96 days of operation of the packed bed, a microbiological analysis showed that R. microsporus was still present and viable in the fermented solid. Our work shows that a continuous packed-bed bioreactor containing fermented solid produced by R. microsporus has good potential for the treatment of high-fat wastewater. |
| Databáze: | OpenAIRE |
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