浄化槽における未利用資源の有効活用に関する実験的研究

概要

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We provided a household with a combined treatment-type jokaso system that could treat garbage disposer wastewater and then tested the usefulness of the treated water and excess sludge generated from the jokaso system. Water treated with the tank was used for toilet flushing, car washing, and field irrigation. Excess sludge in the jokaso system was extracted as scum, fermented for a certain period, and then used as compost for the cultivation of corn. The treated water was of good quality. About 13% of the water was utilized for toilet flushing, whereas only a very small amount was used for car washing and field irrigation. In addition, the compost generated from the scum had a nitrogen content of 2.3%, a phosphorus content of 0.8%, and a potassium content of 0.69%. Corn grown using this compost had a low yield because of a poor balance of nitrogen, phosphorus, and potassium. To increase the corn yield it would be necessary to improve this balance by adding phosphorus and potassium to the fertilizer.
社団法人日本建築学会の論文
2006-06-30