Quiminha (Angola) Wastewater Treatment Plant Project

Wastewater Treatment Plant
340 cubic meters per day

The Quiminha Wastewater Treatment Plan (WWTP) project was part of the design and implementation of an integrated rural development project covering 5,000 hectares in the Quiminha region, some 40 kilometers from the capital, Luanda.

The project was to develop a WWTP for the agricultural land and residential area occupied by 300 families. The main challenges were to reduce the Biochemical Oxygen Demand (BOD) (inlet 200-400 mg/l, treated water <20 mg/l), ammonia, phosphate and Total Suspended Solids (TSS) (inlet up to 400 mg/l, treated water <30 mg/l).

WaterMatic designed and installed an advanced containerized biological treatment (Moving Bed Biofilm Reactor or MBBR- Biological Nutrient Removal or BNR technology).

The treatment process implemented in the system to achieve the required water quality includes pre-treatment using stone trap, mechanical screen (raked bar screen), equalization tank and pumping station, biological treatment using MBBR-BNR technology with biomass carriers based process (anoxic + aerobic), Solid-Liquid separation using tube settlers and sludge treatment using sludge-drying beds.