摘要：We examined the biodegradability of four polyglycerine-fatty acid esters (PGFE's), all non-ionic surfactants, and their influence on the water environment. The biodegradation rates of these esters by river water or activated sludge were equal to that of alkyl benzene sulfonate (LAS), when evaluated by TOC or BOD. Further, these rates were less than those of other chemicals such as polyoxyethylene lauryl acid ether (LPE), polyoxyethylene lauryl acid ester (PAE), aniline and glucose, respectively. TLm concentrations of these esters for killfish (Himedaka), Oryzias latipes , and their inhibitive concentrations for the growth of acetic acid-assimilating bacteria exceeded 1000mg/l in all cases. We concluded that these esters do not significantly hinder water self-purification nor have damaging effects on aquatic organisms.
