Thank you for sharing this insightful perspective on the resource potential of Fecal Sludge (FS). The approach you describe demonstrates a practical and innovative pathway for advancing circular economy principles within the sanitation and construction sectors. Utilizing FS whether in its raw, methane-emitting form as a kiln fuel, or as an additive in brick production offers a sustainable alternative that reduces waste, recovers energy, and supports environmentally responsible building materials.The combination of roughly 20% ash with 80% clay, followed by high-temperature baking, provides a viable method for producing strong, well-insulated bricks suitable for construction. The fact that these bricks can be tested for mechanical strength, thermal properties, and durability further enhances their credibility and market potential.Your emphasis on integrating FS, STP sludge, and material collected from open defecation sites into brick manufacturing highlights a fully circular sanitation pathway. This contributes not only to improved waste management but also to climate resilience, reduced environmental contamination, and new livelihood opportunities.
We appreciate your commitment to promoting sustainable innovations and join you in encouraging members to explore and adopt FS-based brick production as a meaningful step toward a cleaner, greener future.

Dear Members:
FS Fecal Sludge is an excellent Resource for making sanitized Bricks as used in Construcion Industry. 
When FS is more raw and emanating Methane, FS can be used as fuel in a Brick kiln.
Ash accrual kept at 20%, clay 80%, raw matter for raw cast and Baked at higher temperature as good quality Bricks Etc.
Bricks made can be tested for it's strength, insulation properties Etc.
This gives a complete Circularity path, and sustainable too.
With FS, STP sludges and collections from OD sites NSS path, collections can be used for Bricks production. 
We offer our Best wishes to Members to use FS for Bricks production. 

In Zambia, we’re beginning to see how inclusive Faecal Sludge Management (FSM) models can make sanitation systems more equitable and sustainable. These approaches go beyond technology they ensure that low-income communities, sanitation workers, and local enterprises are all part of the solution.A good example is the FSM Action Research Project in Lusaka, implemented by Catalyst Development (CaDev) with support from the Bill & Melinda Gates Foundation. The project tests and compares emptying and transport technologies to identify affordable, safe, and scalable solutions for underserved areas. It also works closely with local authorities to formalize service providers, improve worker safety, and integrate FSM into city systems.Key points include:• Affordability and inclusion: Tiered pricing models ensure even low-income households can access safe emptying services.• Worker dignity: Mechanized tools and licensing frameworks reduce health risks and increase professionalism.• Evidence for scale: The research-action model provides data to guide policy and future investment.• Local ownership: Implementing through a Zambian social enterprise (CaDev) grounds innovation in real community contexts.Ultimately, Zambia’s experience shows that innovation in sanitation isn’t just about technology it’s about designing services that work for everyone, especially the most vulnerable.