A Study on Sewage Treatment and its Reuse for Gardening Purposes
Keywords:
Sewage Treatment, batch studies, gardening purpose, primary treatment, reuse of waste waterAbstract
Sewage or waste water treatment and its possible recycling is the need of the hour in view of
heavy demand on natural water resources. Indiscriminate disposal of sewage deteriorates the
quality of available water. The present study focuses on studying the sewage treatment
options for possible reuse for gardening purposes in an academic Institute. Three options are
considered (i) conventional secondary treatment without recycle (ii) conventional treatment
with recycle (iii) only primary treatment. Bench top model of sewage treatment plant is set up
and experiments are conducted for the above options. pH, TS, TSS, BOD and COD values
are determined in the laboratory to determine the efficiency of the treatment plant. Cow dung
and urea are added as seed and nutrient for the bacterial growth in the treatment plant. It is
noticed that the sewage requires only primary treatment and a detention time of above 2
hours is sufficient to reduce TSS by 58% to be safely used for gardening.
