Energy Recovery from Distillery Spillage and Brokerage Waste Via Anaerobic Treatment

Abby Lamborn, Dr. Yehor Pererva, Dr. Ronald Sims, Biological Engineering, Utah State University, Old Main Hill Logan, Utah 84322

Distillery spillage and brokerage waste contains high concentrations of organic chemicals, including ethanol and sugars, that exerts high oxygen demand that results in expensive treatment using aerobic processes. Anaerobic treatment may provide effective treatment without the need to supply oxygen and also provide for energy recovery through the production of bio-methane. Samples of wastes that originated from four different distillery products were evaluated using a Bio-Methane Potential (BMP) procedure for determination of the energy recovery opportunity. The research conducted utilized and compared pre-treatment options for increasing efficiency of energy recovery, including pH adjustment and removing non-degradable suspended solids using chemical coagulation. Our laboratory conducted multiple experiments to test the effect of pre-treatment on biogas production and to compare raw untreated samples with synthetic substrates containing ethanol and sucrose. Cumulative biogas, including both methane and carbon dioxide, were quantitatively determined using gas chromatography. Biogas content was monitored at frequent intervals throughout the anaerobic digestion process, which required different times for different samples and pre-treatment options. Experimental results demonstrated the degradability of distillery waste components under anaerobic treatment and revealed sequential transformation of substrates. One group of compounds were digested earlier than other compounds that resulted in an extended transition period before digestion of other substrates. In addition, some samples demonstrated the simultaneous formation of methane and hydrogen, which the conventional refereed literature considers as competing processes. Overall results of BMP testing indicated that anaerobic treatment has potential for both treatment of and bioenergy recovery from distillery spillage and brokerage waste, which avoids the need for energy intensive aerobic treatment that does not recover bioenergy.

Additional Abstract Information

Presenter: Abby Lamborn

Institution: Utah State University

Type: Poster

Subject: Biological & Chemical Engineering

Status: Approved

Time and Location

Session: Poster 2
Date/Time: Mon 3:00pm-4:00pm
Session Number: 2558