| 摘要 |
A process of environmental recovery in urban regions that acts along the entire watercourse mesh of an urban region, from the canalized domestic course of sewerage systems to the urban sections of riverbed, including the following stages: from the domestic section, such as a sewerage gallery, to promote a micro application of floating or coagulating material in the watercourse to be treated, whether rainwater or sewer matter; followed by micro flocculation, so as to promote an aggregation of particles in suspension downstream, defining flakes of greater dimensions; submit those larger aggregated particles in suspension downstream in this domestic watercourse to, at least one step of dissolution and air injection, causing a micro floatation of such aggregated particles; allowing a micro aggregation of the floating material to occur downstream, which will be removed from this domestic course before it reaches a streamlet or even a river effluent; next, after the flow of water submitted to a micro treatment is thrown into a streamlet or secondary effluent (which is referred to as a regional course of water), submitted to at least one step of air injection or aeration; followed by a medium application of flocculating or coagulation material in this secondary watercourse to be treated, formed by micro treated sewers and rainwater from the fountainhead of the streamlet itself; provided that such aeration followed by a medium flocculation, so as to cause an aggregation of particles in suspension downstream, evidencing flakes of greater dimensions; to submit those larger aggregated particles downstream of this secondary watercourse to, at least, one more stage of dissolution and injection of air, causing a medium floatation of those aggregated particles and the occurrence of a medium aggregation of the floating material downstream, which is removed from this secondary course before it reaches a river effluent in its urban section; next, after the flow of the secondary watercourse is submitted to a medium treatment, it is cast into a river effluent, provided that such urban watercourse is submitted to at least one stage of air injection or aeration intercalating with successive and sequential stages of macro flocculation or coagulation, macro aeration followed by macro flocculation, with aggregation of particles in suspension, evidencing flakes of greater dimensions, which are submitted to aggregation with at least one more stage of dissolution and air injection, causing a macro floatation of such aggregated particles and allowing a macro aggregation of the floating material to occur downstream, provided that such material is removed along the urban section of the watercourse of the effluent before it reaches the water dam for urban supply.
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