Anaerobic co-digestion of sewage sludge and grease trap: Assessment of enzyme addition

作者：Donoso Bravo Andres^*; Fdz Polanco Maria

来源：Process Biochemistry, 2013, 48(5-6): 936-940.

DOI：10.1016/j.procbio.2013.04.005

• Co-digestion
• Grease trap
• Lipase
• Methane
• Modeling
• Sewage sludge

Anaerobic co-digestion of grease trap and sewage sludge from a wastewater treatment plant is evaluated. Enzyme-lipase application, both addition and dosage, are evaluated by fitting the methane production of biochemical potential tests with the first order model. The enzyme addition effect, at 2,5 and 10% of grease trap (%GTVS(FED)(-1)) and the enzymes doses, between 0.25 and 1.67% (v/v), without and with grease trap presence were studied. Grease trap addition showed a negative effect on the waste biodegradability, which was completely overcome by the addition of lipase. Enzyme addition improved notably the methane production for all grease trap fractions studied. In regards to the dosage, the best result was achieved between 0.33 and 0.83% (v/v) of enzyme. The co-digestion

• 出版日期2013-6
• 单位INRIA