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Public sector planning, especially in developing countries, is both a theoretical and methodological challenge that is particularly important with regard to the field of environmental sanitation. This field is dominated by a technical vision that often ignores the complexity of the real world and the human dimension influenced by its actions, as opposed to a strategic one. This paper discusses the preparation of the Brazilian National Basic Sanitation Plan (Plano Nacional de Saneamento Básico -PLANSAB) with a particular focus on its future scenario construction phase, which was primarily based on Situational Strategic Planning and prospective methods. Three scenarios were developed in a participatory process that consisted of several steps and involved various social actors, including governmental officials and authorities, informed by a team of experts in charge of the whole planning process. During the process, 10 extrinsic and intrinsic factors influencing the sector were considered, which led to the generation of a set of macro directives, strategies and targets for the expansion of access to water supply, sanitation, solid waste management and urban storm water management over the next 20 years. PLANSAB was able to overcome many of the criticisms that are typically raised with regard to traditional planning, although, as with any political process, it will not be immune from inertial factors that may create obstacles during the implementation phase.

ResumoOs confinamentos de suínos e a disposição inadequada desses dejetos trazem como consequência a contaminação de águas e do solo. Em muitas granjas é comum a aplicação dos dejetos ao solo como forma de fertilização, porém, sem nenhum controle sobre a qualidade do efluente que está sendo lançado. O Ascaris suum é um parasita de suínos que pode infectar humanos, porém não é dada a devida importância à presença deste como contaminante do solo e água. Neste trabalho o efluente de uma suinocultura foi tratado em um sistema composto por reator anaeróbio compartimentado (RAC) e um reator anaeróbio de manta de lodo UASB seguido de lagoas de polimento para remoção de ovos de helmintos. O experimento foi realizado na suinocultura da Fazenda Experimental hélio Barbosa em Igarapé/MG. No afluente foi encontrado valores de ovos de helmintos na faixa de 2.891 a 88.848 ovos L -1 , enquanto o efluente apresentou ausência de ovos, mostrando a alta eficiência do sistema de tratamento. Quanto ao lodo das lagoas, este apresentou elevada concentração de ovos viáveis variando entre 10,1% a 59,8%, fora dos padrões preconizados para a sua utilização na agricultura. Palavras-chave: Contaminação, reuso agrícola, ovos de helmintos AbstractThe swine confinement farms and the improper disposal of their wastes carry result in contamination of water and soil. On many farms is common slurry application to soil as a means of fertilization, but without any control over the quality of the effluent being released. What is a parasite Ascaris suum from pigs can infect humans, but is not given due importance to the presence of this contaminant as soil and water. In this work the effluent of a pig was treated in a system composed of anaerobic baffled reactor (ABR) and a UASB followed by polishing ponds for removal of helminthes eggs. The experiment was conducted at the Hélio Barbosa Experimental Farm pig in the city of Igarapé / MG. Values found in the influent of helminthes eggs in the range from 2891 to 88,848 eggs L-1, while the effluent showed absence of eggs, showing the high efficiency of the treatment system. While the sludge ponds, it showed high concentration of viable eggs ranged from 10.1% to 59.8%, not being in conformity with the requirements for reuse in agriculture.