Evaluation of Algal Growth Inhibition of Effluents for Treated Water from Tandoku-syori and Gappei-syori Johkasou Using the WET Method

In Japan, the WET method for assessing ecological effects of wastewater in a short-term chronic toxicity test employing aquatic creatures is now being explored development. On other hand, there johkasou, which an individual decentralized treatment facility Japan. However, impact this johkasou treated water, has yet to be determined. Therefore, study, tandoku-syori and gappei-syori water greywater were collected from 120 sites Saitama, algae growth inhibition effect was evaluated test. As result, had stronger growth-inhibiting than on algae. It also confirmed that vary greatly site site. Differences observed quality between winter summer, but no significant difference growth. The correlation each sample’s concentration development sample low.