• Andrew Ofoedu
• F.N. Uzondu

Spent engine oil is a prime source of environmental pollution. It causes soil and groundwater contamination when disposed in sewers. There is therefore need to recycle the oil in order to reduce its negative effects on the environment. Spent engine oil can be treated to produce asphaltic sludge and regenerate base oil. The sludge produced can be used as a resin for black printing ink and the base oil can be refined for further use in lubrication. The spent engine oil was first treated with sulphuric acid at different temperatures to produce resinous sludge. To study the effect of acid volume and temperature on sludge weight, univariable models were developed and the coefficients determined using the least square technique. Two models were developed to determine the effect of acid volume on sludge yield and the quadratic model was found to be more accurate based on the error functions calculated. First order, quadratic, cubic and fourth order models were tested to study temperature effect on sludge weight and fourth order model was found to best fit the experimental data. The optimum temperature was found to be 52°C and the sludge weight begins to decrease when this temperature is exceeded.

Spent engine oil, base oil, acid, soil, groundwater, contamination, resin, sludge, lubrication, temperature, volume and model.

"Modeling Asphaltic Sludge Generation from Spent Engine Oil", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.1, Issue 1, page no.30-34, June-2014, Available :http://www.jetir.org/papers/JETIR1401006.pdf

"Modeling Asphaltic Sludge Generation from Spent Engine Oil", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.1, Issue 1, page no. pp30-34, June-2014, Available at : http://www.jetir.org/papers/JETIR1401006.pdf