Our ecovillage utilizes a biodigester as an excellent solution for sewage treatment. Biodigesters offer the ability to transform waste into usable energy, in the form of methane, and leftover product for fertilizer. Our biosystem consists of a biodigester (left), compensation box (middle), biofilters (right), lake of macrophytes (algae), and root zone (far right). It can be built with relatively low cost and ease, and does not require sophisticated materials or advanced construction knowledge to build.
The biofertilizer produced in the treatment process has no pathogens, due to the anaerobic fermentation it passes through, and is ideal for use in the maintenance of community squares and gardens because it does not pose health risks. It is consolidated as a perfect substitute for chemical fertilizers, which can be more expensive and aggressive to the environment.
The methane gas that is captured in the biodigester is of good quality and can be used in the kitchen of public schools, nurseries and hospitals, or, in large quantities, in thermoelectric plants.
Here in our reserve, initially, we built the biosystem with a focus on sewage treatment. However, the extraction of products from the process far exceeded the expectations foreseen in our planning, and today we have at least two hours of gas daily for consumption in the kitchen and workshop, while biofertilizers are used in the orchard, where we obtained a gain of productivity of at least 50%.