The prevailing hyper-arid climate of Kuwait is not favourable to the existence of any river systems in the country. There are no permanent rivers or lakes. The use of treated wastewater becomes one of the most important solutions for irrigation of agricultural crops and landscape. In the year 2000, a sewage treatment system was required to treat the local wastewater for irrigation use in the Wafra area.

Napier-Reid provided a BIO-BATCH™ Sequencing Batch Reactor (SBR) system to the general contractor, Burhan Kuwaiti Trading & Construction Company, one of the leading construction groups in the Gulf Region. The design flow is 4,000 m3 per day.

Napier-Reid’s scope of supply included one 316L stainless steel arc bar screen, a manual standby bar screen, and a vortex grit removal system to efficiently remove sand and grit particles; one screw grit classifier to separate and dewater grit/sand; one 2 HP air blower assembly; two SBR tanks and one sludge holding digester both furnished with PVC headers and tubular fine bubble diffusers; two 316L stainless steel Uni-Flow™ decanters (one per SBR tank), each with 5m of weir length. A PLC control panel was supplied for control of the entire process.

The project is one of the first SBR systems done in the Middle East. It has been operating to the satisfaction of the customer.