Unit BOD Load of Cooked Food Waste

• Published in: Journal of Home Economics of Japan Vol. 41; no. 9; pp. 833 - 840
• Main Authors: HASEGAWA, Reiko, MORI, Motoko, FUNASAKA, Ryozo, OSE, Youki
• Format: Journal Article
• Language: English; Japanese
• Published: The Japan Society of Home Economics 1990; 一般社団法人 日本家政学会
• Subjects: BOD load; cooked food waste; ignition loss; multiple regression analysis; regression equation; water pollution; 回帰式; 強熱減量; 水質汚濁; 生物化学的酸素要求量負荷; 調理食品廃棄物; 重回帰分析
• ISSN: 0913-5227; 1882-0352
• DOI: 10.11428/jhej1987.41.833

In Japan, water quality has been improving gradually year by year, but recently the tendency has been retarded by the increased input of gray-water, especially cooked food waste. Untreated cooked food waste disposed directly into the river through street gutters, is decomposed in the river and plays an important ingredient as BOD materials. The authors tabulated the BOD per unit g of food for 99 kinds of uncooked foods and 33 kinds of cooked foods to estimate the BOD load for each type of food waste, together with carbon tetrachroride extractable materials, ignition loss and water contents. Simple and significant correlation between BOD and ignition loss was obtained when both variables were expressed in logarithmic forms : ln y=0.913 ln x +0.448 (γ=0.865), where y, BOD expressed as ppm; x, ignition loss ex pressed as %. Correlation coefficient between measured and predicted BOD was significant at 1% (γ=0.865), and the BOD of food, whose value was not determined, will be estimated from the above equation by using the ignition loss. The agreement between the calculated and determined BOD values was found for the food listed in “The Japan Standard Food Composition Table, ” and it is thought that BOD value of food can be estimated from the above equation.