Abstract:
This study was development of a C-language computer program to be used for primary design and preliminary cost estimation of biological wastewater treatment systems. The treatment processes included sand trap or grit chamber, equalization tank, primary sedimentation tank, aeration tank, secondary clarifier, aerated lagoon, anaerobic pond, facultative pond, maturation pond and disinfection by chlorination, ozone and UV as well as anaerobic digestion, sludge-drying beds and mechanical dewatering machines, i.e,. vacuum filter, filter press, belt press and centrifuge. This program will enable engineers to design a more proper and precise wastewater treatment plant in a shorter time. All parameters in this program can be easily changed or corrected to give the most satisfying result. Using computer in designing and primary cost estimation of wastewater treatment systems can be very useful, regarding its time saving and mistake-free calculation. Be playing around with different treatment approaches, one can analyse and finally get the most economical process.