首页|Combined biological treatment/ozonation of wastewaters for the mineralisation of non-biodegradable naphthalene-1,5-disulphonic acid
Combined biological treatment/ozonation of wastewaters for the mineralisation of non-biodegradable naphthalene-1,5-disulphonic acid
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NSTL
This paper deals with the ozonation and biological treatment for achieving the mineralisation of the non-biodegradable compound naphthalene-1,5-disulphonic acid (NADSA; C10H8O6S2), a basic chemical for dyes and building materials. This combination of ozonation and biological treatment is expected to minimise the ozone consumption compared to ozonation alone. To examine the influence of ozone on the biodegradability of NADSA, a lab-scale plant was run semi-continuously and batch tests were conducted for comparison. For total ozonation, 1.8 mol O-3/Mol DOC have to be used. For optimum biodegradation, only 0.8 mol O-3/mol DOC are needed. The results show that by using a combination of ozonation and biological treatment the ozone consumption can be reduced by more than 50% compared to ozonation alone.
NSTL
