Avaliação de viabilidade para tratamento de lodos de tanques sépticos com soluções individuais e consorciadas

Abstract

In Brazil, sewage treatment with individual solutions is still widely used, due to the nonexistence or impracticability of a sewage collection network, individual solutions can be considered a good alternative as long as they are properly operated. One of the premises to maintain good operation is the removal of sludge from septic tanks, which needs to be treated and properly of disposed, but the municipalities that most use this type of treatment are small municipalities, which often do not have conditions of investing in an adequate system, disposing of it inappropriately, or generating high costs to treat it, one of the alternatives is to work with consortium solutions, which can make feasible the proper destination of this material, but the displacement to carry out the treatment can make it unfeasible this alternative, as a result, this work aimed to raise the volume of sludge generated in septic tanks in the municipalities that make up the Associação dos Municípios do Nordeste Rio Grandense (Amunor), as well as to evaluate individual and consortium treatment solutions. With the data, it was noticed that the Amunor region is characterized by small municipalities, which consequently have a low volume of sludge, and considering daily collections, the cost of transport has a significant impact, but there is an alternative for temporary storage that makes this cost praticable. , in addition, it was possible to perceive that even in the largest municipalities in the region, it is possible to work with consortium solutions, since, regardless of whether it is an individual or collective solution, certain structures with fixed costs are necessary, and the larger the size, the greater this cost is diluted.