STARTUP AND OPERATION OF A LARGE WASTEWATER TREATMENT PLANT IN WARM CLIMATE AND UNDER MODIFIED CONDITIONS - A CASE STUDY

摘要

This study summarizes the findings and lessons learned from the start up and operation of arnlarge wastewater treatment plant in warm climate under modified conditions. The treatmentrnworks comprise of a newly constructed sewage treatment plant located in the city of Dubai,rnU.A.E with an ultimate capacity of 300 Ml/d. The plant can be reviewed in three major parts;rni.) liquid stream, ii.) sludge stream and iii.) odor control stream all having the latest state ofrnthe art technology and related equipments. The challenge in starting up the plant was relatedrnto the fact that only 20% of the flow was available in the form of hauled sewage to be hauledrnfrom septic tanks located in various parts of the city and also from the nearby industry whichrnwas uncontrollable. Furthermore, some parts of the plant were not ready to be commissionedrnon the day of the planned startup not to mention that effluent irrigation main was not completernto receive the treated sewage effluent (TSE) from the plant. A comprehensive commissioningrnplan was implemented and followed during the startup which was tailored according to thernactual conditions. The plant commissioning was conducted in a phased sequence to cater forrnthe expected and unexpected changes related to the inlet conditions. Commissioning andrnoperation of the plant was carried for over 18 months with success considering thernchallenging and difficult conditions.