TY - JOUR AU - Ahmad, Jamil AU - Umar, Muhammad AU - karim, Syed Shujaat AU - amaduddin, Muhammad AU - Shah, Feroz AU - Hussain, Iltaf PY - 2017/12/30 Y2 - 2024/03/29 TI - Design of a car wash waste water treatment process for local car wash stations JF - Journal of the Pakistan Institute of Chemical Engineers JA - JPIChE VL - 45 IS - 2 SE - Articles DO - UR - http://piche.org.pk/journal/index.php/jpiche/article/view/371 SP - AB - <p>The car wash water treatment and recycling study was conducted using laboratory scale coagulation flocculation followed by sand &amp; gravel filtration unit. Results obtained have been submitted for publishing and currently under review process. Based upon the results obtained a treatment and recycling process was designed for the actual 16.2 m<sup>3</sup>/day car wash water. The process comprised of a coagulation flocculation tank, coagulation storage tank, a sand and gravel filter and a final treated water storage tank. Different design options along with merits and demerits of each one were proposed. The final design selected includes coagulation flocculation tank underground, the sand &amp; gravel filter at a height of 6 m above the ground level while the coagulant storage tank and the treated water storage tank at the ground level.  The design dimensions of various units calculated given as 1 m<sup>3</sup> of coagulant storage tank, coagulation flocculation tank with 4.35 m height and 2.175 m diameter, A sand and gravel filter with 2.5 m<sup>2</sup> surface area and a 20 m<sup>3</sup> water storage tank. The total cost of the treatment system including fixed cost of Rs 407049 and running cost of 438135 was calculated as Rs 845184.</p> ER -