The study consisted of the evaluation of the treatment of septic tank sludge in a vertical constr... more The study consisted of the evaluation of the treatment of septic tank sludge in a vertical constructed wetland system (CW), built according to the first stage of the French system. The system operated also for sewage treatment and one of the beds (area of 29.1 m², height of the support medium of 0.7 m and planted with Tifton 85 grass, Cynodon dactylon Pers), began to receive the application of sludge from clean-pit trucks once a week. The percolated liquid was directed to post-treatment in the other two beds of the French system. The application of the raw sludge had average hydraulic loading rate of 13.1 m³/m².year and solids loading rate of 81 kgTS/ m².year. The system improved the quality of percolated liquid in terms of carbonaceous and nitrogenous matter (average COD removal efficiencies of 82% and TKN of 63%), but the percolate post-treatment strategy did not result in substantial improvements. The dewatering of the accumulated sludge on top of the bed occurred satisfactorily (55% of dry solids), the Tifton 85 grass was resistant to the operational conditions and the system proved to be a compact technology (sludge treatment capacity of an equivalent population between 1140 and 3799 inhabitants in the unit of 29.1 m 2 , corresponding to 39 to 131 inhabitants per m 2 of surface area).
No ano de 2006, quando aproximadamente 97% dos 853 municipios do Estado de Minas Gerais lancavam ... more No ano de 2006, quando aproximadamente 97% dos 853 municipios do Estado de Minas Gerais lancavam os esgotos brutos nos corpos d’agua, foi publicada a Deliberacao Normativa COPAM no 96/2006, sobre a implantacao de sistema de tratamento de esgotos sanitarios em todos os municipios. Com isso, no mesmo ano, implantou-se o Programa Minas Trata Esgoto com o objetivo de realizar a gestao estrategica da implantacao desses sistemas, monitorando o aumento do percentual de esgoto tratado no Estado por meio do processo de licenciamento ambiental das ETE. Tal monitoramento possui muitas fragilidades e para tentar minimiza-las o Programa realiza campanhas de vistoria, por bacia hidrografica, para avaliacao da situacao real do esgotamento sanitario dos municipios. O presente trabalho consiste em uma avaliacao ex-post do inicio do Programa ate o ano de 2012, tendo em vista o ciclo de politicas publicas. A implementacao ocorreu da forma top-down , sem a consideracao de alguns condicionantes sistemic...
The study consisted of the evaluation of the treatment of septic tank sludge in a vertical constr... more The study consisted of the evaluation of the treatment of septic tank sludge in a vertical constructed wetland system (CW), built according to the first stage of the French system. The system operated also for sewage treatment and one of the beds (area of 29.1 m², height of the support medium of 0.7 m and planted with Tifton 85 grass, Cynodon dactylon Pers), began to receive the application of sludge from clean-pit trucks once a week. The percolated liquid was directed to post-treatment in the other two beds of the French system. The application of the raw sludge had average hydraulic loading rate of 13.1 m³/m².year and solids loading rate of 81 kgTS/ m².year. The system improved the quality of percolated liquid in terms of carbonaceous and nitrogenous matter (average COD removal efficiencies of 82% and TKN of 63%), but the percolate post-treatment strategy did not result in substantial improvements. The dewatering of the accumulated sludge on top of the bed occurred satisfactorily (55% of dry solids), the Tifton 85 grass was resistant to the operational conditions and the system proved to be a compact technology (sludge treatment capacity of an equivalent population between 1140 and 3799 inhabitants in the unit of 29.1 m 2 , corresponding to 39 to 131 inhabitants per m 2 of surface area).
No ano de 2006, quando aproximadamente 97% dos 853 municipios do Estado de Minas Gerais lancavam ... more No ano de 2006, quando aproximadamente 97% dos 853 municipios do Estado de Minas Gerais lancavam os esgotos brutos nos corpos d’agua, foi publicada a Deliberacao Normativa COPAM no 96/2006, sobre a implantacao de sistema de tratamento de esgotos sanitarios em todos os municipios. Com isso, no mesmo ano, implantou-se o Programa Minas Trata Esgoto com o objetivo de realizar a gestao estrategica da implantacao desses sistemas, monitorando o aumento do percentual de esgoto tratado no Estado por meio do processo de licenciamento ambiental das ETE. Tal monitoramento possui muitas fragilidades e para tentar minimiza-las o Programa realiza campanhas de vistoria, por bacia hidrografica, para avaliacao da situacao real do esgotamento sanitario dos municipios. O presente trabalho consiste em uma avaliacao ex-post do inicio do Programa ate o ano de 2012, tendo em vista o ciclo de politicas publicas. A implementacao ocorreu da forma top-down , sem a consideracao de alguns condicionantes sistemic...
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