Anaerobic co-digestion of a ternary mixture sewage sludge with food waste and residual glycerol was evaluated in pilot scale units, the aim to increase methane production anaerobic digesters at treatment plants. Two (useful volume 320 L) operated simultaneously for 60 days room temperature (24 °C on average). One digester received only feed, other mixture. The feeding routine respected semi-continuous mode. units continuously promoted mixing through bottom-up recirculation system hydraulic...

The goal of this work was to study the effective recovery phosphorus from supernatant anaerobic digestion sewage sludge by precipitation as struvite. formation struvite is envisioned a promising process for nutrient removal and subsequent recovery, thus providing strong incentive its implementation, since renewable source phosphorus. Struvite obtained controlled addition Mg(OH)2 or MgCl2. We evaluated ammonia phosphate under equimolar conditions magnesium stoichiometric excess 100 200%...

O artigo avalia os indicadores de desempenho operacionais e qualidade do Sistema Nacional Informações sobre Saneamento (SNIS) para sistemas abastecimento água (SAA) esgotamento sanitário (SES). Levantaram-se praticados por 11 nacionais internacionais avaliação, selecionaram-se 24 da base SNIS 2015, visando à identificação suas recorrências aplicabilidades pelos demais. Por meio Método Delphi, realizou-se uma consulta a 38 especialistas setor saneamento definição grau importância cada...

Abstract This work evaluates the reduction of scum accumulation on top surface upflow anaerobic sludge blanket (UASB) reactors by addition hydrolytic enzymes in their feed. For over 1 year, two UASB 1.4 L were maintained at 30 °C and continuously fed with synthetic domestic wastewater (containing 150 mg/L soybean oil) under a hydraulic retention time 10 h. The Control reactor was only wastewater. Beginning 226th day operation, low-cost (obtained solid-state fermentation Aspergillus terreus,...

Cost-effective solutions are a must in developing countries, not only regarding investment costs, but also respect to technology and operating practices. With these two goals mind, Brazil particular effort has been directed for the development application of Chemical Enhanced Primary Treatment (CEPT) process Upflow Anaerobic Sludge Blanket (UASB) process, both followed by complementary secondary treatment. Both technologies under current expansion Brazil. Large CEPT plants have designed...

The goal of this work was to study the effective recovery phosphorus from supernatant anaerobic digestion sewage sludge by precipitation as struvite. formation struvite is envisioned a promising process for nutrient removal and subsequent recovery, thus providing strong incentive its implementation, since renewable source phosphorus. Struvite obtained controlled addition Mg(OH)2 or MgCl2. We evaluated ammonia phosphate under equimolar conditions magnesium stoichiometric excess 100–200%...

Anaerobic treatment, such as the Upflow Sludge Blanket - UASB has many advantages: a compact system, with practically no equipment in anaerobic vessel, low operational costs, very energy consumption, and excess sludge produced. However, taking into account its poor effluent quality, legal water quality standards, post treatment is must. Brazil experiencing scheme plus aerobic secondary aiming reduction investment mainly excellent results. Three cases are discussed this paper: two small...

This paper presents bench scale experiments related to anaerobic co-digestion of aerobic sewage sludge from a pilot WWTP (waste water treatment plants), raw glycerol biodiesel industry and food waste.Assays were conducted in 100 mL non-stirring penicillin vessels, at 30 °C planned according three optimization phases: (1) binary mixture FW (food waste); (2) glycerol; (3) ternary sludge, FW, glycerol.In the first second phases, highest SMP (specific methane production) was achieved by 10%...

Em 2004, o Conselho Nacional de Meio Ambiente (CONAMA) aprovou a primeira regulamentação brasileira sobre os procedimentos para avaliação material oriundo dragagens: Resolução CONAMA n° 344/04. Esse ato normativo estabeleceu que, no prazo cinco anos, contados da data sua publicação, haveria uma revisão que fossem estabelecidos valores orientadores nacionais classificação do dragado. Tal ocorreu, culminou na publicação 454/12. Este artigo realiza análise comparativa entre 344/04 e 454/12, com...

RESUMO Tendo como referência indicadores operacionais relacionados a perdas de água e que constam na base dados do Sistema Nacional Informações sobre Saneamento (SNIS), baseados em resultados ano 2010, o presente estudo definiu critérios para estabelecimento parâmetros avaliação desempenho operacional - benchmarking , caso utilizou referentes 22 prestadores regionais serviços saneamento no Brasil, notadamente as companhias estaduais saneamento. Complementarmente, partir agrupamento dos...

Wastewater treatment plants are designed, operated, and maintained in light of environmental legislation, which mainly determines the removal certain pollutants.This article proposes to comparatively assess economic impacts wastewater technological routes commonly used Brazil.For this purpose, life cycle assessment costing were applied four processes at two different scales.The results show positive contribution up-flow anaerobic sludge blanket reactors flowcharts reduce generation by 3.15%...

The Moving Bed Biofilm Reactor/Integrated Fixed Film Activated Sludge (MBBR/IFAS) process is a recent development technology that incorporates the characteristics of processes with biomass growth in suspension and attached (biofilm).The control parameters are practically same applied to activated sludge process, saved some specifics.The principal aim this paper presents comparative analysis between implantation costs new IFAS, high-rate, conventional extended aeration plant for population...

This article aims to discuss experiences of application urine for agricultural purposes conducted in other countries such as Sweden, Germany, China and West Africa.The methodology the study included a literature search on industry production fertilizers Brazil, qualitative quantitative characterization human urine, different technologies segregation treatment extract nutrients.As result, we sought demonstrate that it can also be viable solution Brazil with focus environmental sustainability...

Anaerobic biodegradability tests of algae biomass produced on a facultative sewage stabilization pond were conducted at 303 K for up to 24 days. The addition urea and KH2PO4 enabled the adjust its chemical oxygen demand∶N∶P ratio 350∶5∶1. Comparison with raw substrate showed that it contained sufficient amounts N P bacteria metabolism. anaerobic sludge as inoculum did not affect overall degradation efficiency but increased initial biogas production rate, from 9.2 (without inoculum) 30.2...

Abstract Informal housing, and operational management deficiencies, influence sewerage system performance in Brazil. Inadequate sewage volumes storm sewers lead to fecal contamination affect recreational water environments. As overflow structures, dry-weather intakes (DWSIs) are used intercept transfer from storm- sewage- sewers. For cities without public services, the DWSI strategy has been suggested as an option enable easier more rapid responses terms of pollution control. The may also...

Anaerobic digestion is a widely used and well-established technology for sewage treatment. Derived from this practice, the great advantage of enabling biogas production, clean sustainable energy, through sludge hydrolysis. However, one main limitations resistance to degradation microbial cells present in sludge. These often contain complex carbohydrates resistant biodegradation, making hydrolysis step slower compared other steps. In sense, series technologies methods are available...

O artigo desenvolve uma avaliação do desempenho operacional e de qualidade dos modelos prestação serviços abastecimento água esgotamento sanitário vigentes no Brasil. Preliminarmente, agruparam-se as diversas categorias em quatro grupos a partir das abrangências atuação naturezas jurídico-administrativa estabelecidas pelo Sistema Nacional Informações sobre Saneamento (SNIS). Em seguida, selecionaram-se indicadores operacionais relevantes SNIS, ano-base 2015. De posse valores para cada...