QUICK BIOCHEMICAL OXYGEN DEMAND TEST AND APPARATUS FOR THE SAME

摘要

A novel method for the determination of biochemical oxygen demand in aqueous liquids containing organic matter within 20 minutes and an apparatus for the same. The method, in which a microorganism culture is utilized as it is, comprises aerating the microorganism culture to exhaust the organic matter usable to the microorganisms, adding a sample containing the organic matter into the above exhausted culture to measure an amount of oxygen consumed by the microorganisms, and calculating the BOD of the sample directly. The apparatus according to the present invention comprises a magnetic stirrer (11), an aerating instrument (8), a dissolved oxygen/temperature sensor (1), tubing pumps (3, 4) and QBOD bottle (5). In the apparatus a timer is equipped, and a calculating method is programmed, so that BOD is automatically calculated using a dilution and OUR. Therefore, the apparatus is easy to use in a working spot.