Detergents in the environment by Milan J. Schwuger

By Milan J. Schwuger

Deals assurance of the environmental behaviour of detergent ingredients, concentrating on physiochemical interactions with soil and sediments. this article provides the present country of information on lately brought detergent ingredients, together with zeolites, polycarboxylate compounds, ethylene dinitrilotetraacetic acid (EDTA), and nitrilotriacetic acid (NTA).

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Sewage treatment effluent is diluted in surface waters. The dilution factor varies substantially from place to place. In surface waters, naturally and occurring human-generated substances, including some remaining surfactant traces, are further intensively biologically metabolized by a ''self-cleaning'' process. Depending upon the intended use of the surface waters and the performance profile of sewage treatment plants, there are legal requirements for surfactants and ingredients of detergents and cleaning products.

During sewage treatment, substantial dispersion of the suspended solids was observed with increasing concentrations of surfactants. This impacted on the efficiency of the sedimentation process. In biological sewage treatment plants with aeration tanks, the efficiency of the oxygen uptake of the medium and fine bubbly aggregates was reduced by more than 80% during the activated sludge stage. Foam flotation of the activated sludge substantially disturbed the functioning of the sewage treatment unit.

It is the first book available based on this conception, thus closing a gap in consideration of the environmental influence of detergents. I hope this new approach will be of interest and will be well received as a contribution to the extensive literature on biodegradability. MILAN JOHANN SCHWUGER Page v CONTENTS Preface iii Contributors vii I. Surfactants 1. Loading Surface Waters with Surfactants Franz Malz 3 2. Physicochemical Interactions of Surfactants and Contaminants in Soil Erwin Klumpp and Milan Johann Schwuger 39 3.

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