TECHNOLOGY FOCUS - MECHANICAL ENGINEERING - Preferred Apparatus: The bowl of the horizontal axis centrifuge has a baffle plate. The recovered oil is discharged from the horizontal axis centrifuge by an adjustable weir disk or an impeller disk. The concentrated syrup is stored in a storage tank before conducting the concentrated syrup to the horizontal axis centrifuge. The concentrated syrup is conducted from the storage tank to the horizontal axis centrifuge by drawing off the concentrated syrup at the top of the syrup stored in the storage tank. The device for increasing the yield of oil production has a unit for preparing concentrated syrup as a by-product from an ethanol production and an unit for recovering oil from the concentrated syrup. The unit for recovering oil from the concentrated syrup has a horizontal axis centrifuge with a bowl, a discharge of deoiled syrup and a discharge of oil at the bowl. The oil is recovered from the concentrated syrup by horizontal axis centrifuge such as a three-phase horizontal axis centrifuge. Preferred Properties: The diameter of baffle plate is 0.7-0.95 times with respect to the diameter of the bowl of the horizontal axis centrifuge. A centrifugal acceleration of 1800-2100x G, preferably 1900-2000x G, most preferably 1960x G is provided on the concentrated syrup in the horizontal axis centrifuge. The diameter of the discharge of oil is 0.90-1.10 times with respect to diameter of a discharge of deoiled syrup.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The concentrated syrup as a by-product is obtained from an ethanol production by producing whole stillage, recovering thin stillage from the whole stillage using a horizontal axis centrifuge and concentrating the thin stillage using an evaporator. A concentrated syrup as a by-product is obtained from an ethanol production and oil is recovered from the concentrated syrup using horizontal axis centrifuge. The horizontal axis centrifuge has a discharge of oil at a bowl of the horizontal axis centrifuge.