Abstract
Drilling Slurry or drilling mud is used to stabilize the drilled wellbores. Unfortunately, its disposal on land renders the soil infertile, while its coagulation with aluminium salts poses potential health risks. Here, two natural coagulants: Moringa oleifera and Benincasa hispida were investigated as potential sustainable alternatives to chemical coagulants. These are cost-effective, highly biodegradable, and safe from the human health point of view. Various forms of these substance: seed powder, de-oiled seed powder, and seed oil were used to minimize the drilling mud slurries. For the turbidity removal, the best efficiency of 99.71% was obtained by using de-oiled seed powder of Benincasa hispida whereas the total solids removal efficiency of 94.19% was obtained by using de-oiled seed powder of Moringa oleifera at an optimum dosage of 10 g/l. These results are comparable to those obtained by using alum, thus confirming the effectiveness of the natural coagulants for management of drilling slurries.
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