Anaerobic biodegradability of dairy wastewater pretreated with porcine pancreas lipase

Brazilian Archives of Biology and Technology

Adriano Aguiar Mendes²  Ernandes Benedito Pereira¹  Agenor Furigo Jr.¹  Heizir Ferreira De Castro¹ 

[1] ,Universidade Federal de São João Del-Rei Campus Sete LagoasMG ,Brasil

关键词: Biodegradability;    hydrolysis;    lipases;    lipids-rich wastewater and biogas;   

DOI  :  10.1590/S1516-89132010000600003

来源: SciELO

【 摘 要 】

Lipids-rich wastewater was partial hydrolyzed with porcine pancreas lipase and the efficiency of the enzymatic pretreatment was verified by the comparative biodegradability tests (crude and treated wastewater). Alternatively, simultaneous run was carried out in which hydrolysis and digestion was performed in the same reactor. Wastewater from dairy industries and low cost lipase preparation at two concentrations (0.05 and 0.5% w.v-1) were used. All the samples pretreated with enzyme showed a positive effect on organic matter removal (Chemical Oxygen Demand-COD) and formation of methane. The best results were obtained when hydrolysis and biodegradation were performed simultaneously, attaining high COD and color removal independent of the lipase concentration. The enzymatic treatment considerably improved the anaerobic operational conditions and the effluent quality (lower content of suspended solids and less turbidity). Thus, the use of enzymes such as lipase seemed to be a very promising alternative for treating the wastewaters having high fat and grease contents, such as those from the dairy industry.

【 授权许可】

CC BY-NC   
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