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• W771212694 abstract "Human development and population growth during the twentieth century increased the water demand, tripling its consumption between 1950 and 1990. As the water streams were polluted; and as water is the source of minerals and also regulates vital functions, it becomes the vehicle of transmission and consequently spreads many diseases. Probably, the industries are the major responsible for this pollution when they dump untreated effluents to water streams, saturating the already insufficient net of sanitation facilities polluting water and soil. An effective treatment has been established with low cost in Europe and the United States, through constructed systems on wetlands Constructed Wetland Systems CWSs, gradually used in other countries in the last three decades. Lately, we observe a continuous growth in Brazilian poultry business, and poultry industry showed greatest dynamism in the country, following the global market. Pondering this information and the efficiency of such treatment, this work aimed to study prototypes, in a laboratory scale, simulating ascending and descending types of CWSs, vegetated with aquatic macrophytes Eichhornia crassipes and the uses of aggregates and soil, to treat industrial wastewater from slaughterhouses and aviary. We conducted the initial characterization of the effluent to have an idea of its constituents and to scale the system and the continuous flow. Furthermore, we characterized the soil to be used in this system. The collects are periodically made in the refrigeration industry FRICOCK FRIGORIFICACAO AVICULTURA INDUSTRIA E COMERCIO LTDA. for local treatment simulation. The effluent that was treated with 12 prototypes of CWSs are analyzed with some frequency. The results of these reviews were compared to the effluent coming from the industry, attaining significant removals. The highest efficiencies occurred in the following parameters: conductivity, salinity and total dissolved solids (TDS) 50%, total suspended solids (TSS) 92%, 99% turbidity, 59% nitrite, nitrate 93%, 81% ammonia, sulfide 98% sulfate 79%, chemical oxygen demand (COD) and biochemical oxygen demand (BOD) 93%, 84% total phosphorus and total nitrogen 83%, and total coliforms and 99.9%Escherichia coli. The treatment system that proved to be the most effective was the ascendant flow containing soil filter combined with the aquatic macrophytes, it showed the greatest reductions in almost all parameters. Fitting into the 8468/76 State Decree Law 997 Article 19 A, which sets the limits for effluent discharge into sewer systems, we can propose a trend that CWSs are an efficient system for the treatment of industrial effluents if operated with proper maintenance." @default.
• W771212694 created "2016-06-24" @default.
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• W771212694 date "2010-01-01" @default.
• W771212694 modified "2023-09-23" @default.
• W771212694 title "Uso de sistemas construídos de áreas alagadas (Constructed Wetland System - CWS) tipo ascendente/descendente, para tratamento de efluentes avícolas" @default.
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