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Effect of enzymatic hydrolysis on anaerobic treatment of dairy wastewater

Paper ID Volume ID Publish Year Pages File Format Full-Text
36092 45120 2006 6 PDF Available
Title
Effect of enzymatic hydrolysis on anaerobic treatment of dairy wastewater
Abstract

The biological treatment of a synthetic dairy wastewater containing high levels of oil and grease (200, 600 and 1000 mg/l) was investigated, using two identical UASB reactors. One reactor was fed with wastewater from an upstream enzymatic hydrolysis step and the other with raw wastewater. The hydrolysis was carried out at 35 °C for 14 h, using an enzyme preparation obtained through solid-state fermentation, presenting pronounced lipase activity. The reactors were continuously operated with each fat concentration. The performance of both reactors was similar up to the concentration of 600 mg/l. However, the benefits of the hydrolysis step became evident with the highest concentration (1000 mg/l). COD removals averaged 90% in the reactor fed with the hydrolyzed effluent and 82% in the control reactor. The results showed that UASB reactors are able to operate, even when fed with high levels of oil and grease in dairy wastewaters.

Keywords
Dairy wastewater; Lipases; Enzymes; Anaerobic treatment; Enzymatic treatment; Oil and grease
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Effect of enzymatic hydrolysis on anaerobic treatment of dairy wastewater
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 5, May 2006, Pages 1173–1178
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
You save - $31
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