Wastewater

ASPAC Engineering has significant knowledge and in-house experience in wastewater and sludge treatment in a sub-Saharan context, ranging from extensive to semi-extensive systems, from centralized to decentralized approaches. Critical is the adaptation of the proposed sanitation solution to the local circumstances, ensuring sustainability in the long run.
Our engineer’s environmentally friendly process designs are based on three fundamentals:
i. Reduced operating costs
ii. Low maintenance requirements,
iii. Simple operation.

ASPAC Engineers can propose designs for:

• Centralized Wastewater Treatment:
• - Extensive = wastewater stabilization ponds (anaerobic + facultative + maturation)
• - Semi-extensive = introduction of biological treatment step such as attached growth process or biomethanisation linked to the anaerobic treatment step
• De-centralized Wastewater Treatment:
• - Septic tanks
• - Design and development of public bio-latrine (small communities, toilet combined with bio-digester)
• - Significant reduction in level of contamination
• - Recycling of resources
• Centralized Faecal Sludge Treatment:
• Decentralized wastewater treatment systems such as septic tanks may still require end-treatment to achieve final stabilized faecal sludge.
• Faecal sludge drying beds are a perfect non-intensive way of faecal sludge treatment, reducing its hazardousness and creating an end product that can be used as fertilizer.