Interest in biodegradability grew as a necessity when problems were created by the use and subsequent discharge of chemicals which did not degrade but persisted in the environment. Probably the best known example is the introduction of the first synthetic detergents in the 1950’s. These detergents, now described as “hard,” were only partially removed in sewage treatment and passed through treatment works, largely unchanged, to rivers. It was common, at least in the UK, to see huge banks of foam created by aeration in activated sludge plants and also at weirs and other sites of turbulence on polluted rivers. The problem, caused by the inability of aquatic bacteria to degrade sufficiently rapidly the highly branched chain alkyl benzene sulphonates, was satisfactorily solved by replacement by the manufacturers of the “hard” type with a biodegradable (“soft”) product in which the degree of branching had been considerably reduced.
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Biodegradation of Water-Soluble Compounds
H. A. Painter
E. F. King
- Springer Berlin Heidelberg