Abstract
Trihalomethane formation potential (THMFP) from chlorination of three species blue-green algae and one species green alga, which often proliferate in eutrophic Lake Kasumigaura, was examined in batch culture experiment. And removal effect of THM-precursor by biological activated carbon fluidized bed reactor (BACFR) was compared with that by biological oxidation reactor packed with honey comb tube (BORHT) under continuous flow conditions. THMFP of green alga Scenedesmus sp. was extremely higher than any other blue-green algae, Microcystis aeruginosa, Oscillatoria mougeotii and Phormidium tenue. DOC concentration and E260 as THMFP parameters were efficiently removed by BACFR. The removal of the two parameters by BACFR was 60%, while those of them by BORHT were 20% and 10%, respectively. It was found that BACFR was much more efficient than BORHT to the removal of THM precursor from algae appearing in an eutrophic lake.
