Abstract
The growth of benthos in Fukuyama inner harbor is inhibited because of the discharge of untreated wastewater into the harbor. Field experiment is conducted to examine restoring benthic environment in sewage-derived soil. Steel-slag that mainly comprised of CaO, SiO2, is used in combination with sediment macrobail fuel cell (SMFC) that can remove electrons from sediment. The restoration effects is evaluated based on benthos in soil and the soil characteristics.
The growth of benthos was improved after application of steel-slag or SMFC. Interestingly, the improvement capacity becomes higher when steel-slag was combined with SMFC. This enhancement may be partly due to the removal of electrons by SMFC, leading to decreases of COD and sulfide in soil.
