礫間接触酸化法による汚濁海水の浄化能に関する実証実験

抄録

Large scale model channels (15m long, 2m wide and 1.4m deep, 2 channels in series) were constructed for contact purification experiments by stone bed with biofilm at the inner canal of Amagasaki port. And three experimental cases of different conditions which were two patterns (one-way and return) and three hydraulic retention times (15, 30, and 60 minutes) of the flow, were carried out from June 1994 to March 1995.
The results obtained are summarized as follows.
1) The removal rate for SS showed higher values than 60%, for the experimental conditions of 15 minutes in hydraulic retention time and 15m in flow distance, and the rate was regarded as the most effective value to the practical use in all other runs.
2) In the return-flow run of experiment the removal rate against the inflow load per unit surface area of stones showed higher values such as 14.6% in SS, 6.6% in COD (no filtrated) and 14.3% in TOC, respectively, than in one-way-flow runs of experiments.