Compostaje de biosólidos de plantas de tratamiento de águas residuales

Torres, Patricia; Pérez, Andrea; Escobar, Juan Carlos; Uribe, Iris Eugenia; Imery, Ricardo

doi:10.1590/s0100-69162007000100021

Cited by 13 publications

(14 citation statements)

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“…2) yielded similar values to those reported for this substrate by Torres et al [21]. In a similar manner, TDB yielded baseline data in accord to reports by Smith and Durham [22], Tarrasón et al [23], and Ramírez et al [24]; whereas AB presented values for nitrogen losses of 28%, consistent with those previously by found by Czechowski and Marcinkowski [25].…”

Section: Baseline Biochemical Characterization Of Experimental Substrsupporting

confidence: 89%

Thermal Drying and Alkaline Treatment of Biosolids: Effects on Nitrogen Mineralization

Silva-Leal¹,

Torres–Lozada²,

Cardoza³

2012

CLEAN Soil Air Water

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Biosolids from the Cañeveralejo WWTP were dehydrated by filter press and then applied two processes to reduce pathogens (PRP): thermally dried biosolid (TDB) and alkalinized biosolid (AB). Untreated, dehydrated biosolid (DB) was used as a control. We evaluated the impact of thermal drying and alkaline treatments on nitrogen mineralization in these substrates. Moreover, agronomic rates for biosolid applications to sugarcane were estimated for each of the treatments leading to application rates of 35.8, 36.4, and 54.5 t/ha for DB, TDB, and AB, respectively, to meet the nitrogen requirement (200 kg N/ha) for sugarcane cultivation (Saccharum officinarum). The results showed that the biosolid rates used increased the mineral nitrogen content of soils by an average of 93.8 and 439.8 mg/kg for all biosolids and the PRP (thermal drying and alkaline treatment) in biosolids had significant effects on mineralization rate, showing better results for the TDBs.

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Section: Baseline Biochemical Characterization Of Experimental Substrsupporting

confidence: 89%

Thermal Drying and Alkaline Treatment of Biosolids: Effects on Nitrogen Mineralization

Silva-Leal¹,

Torres–Lozada²,

Cardoza³

2012

CLEAN Soil Air Water

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“…Desta forma, independentemente do tratamento, o processo de compostagem apresentou eficiência de 100% na redução dos coliformes. Resultados semelhantes a esses foram observados por Curci et al (2007), Torres et al (2007) Tabela 5 -Teores (g/kg de sólidos totais) de macro e micronutrientes no início e ao final do período de compostagem dos dejetos produzidos por bovinos alimentados com dietas com duas relações volumoso:concentrado organismos patogênicos muito próximas a 100%, mesmo se tratando de micro-organismos esporulados. Independentemente do nutriente avaliado, houve correspondência entre as reduções de sólidos totais obtidas com a compostagem e a concentração de nutrientes (Tabela 5).…”

Section: Resultsunclassified

Compostagem dos dejetos da bovinocultura de corte: influência do período, do genótipo e da dieta

Orrico¹,

Orrico

Lucas

et al. 2012

R. Bras. Zootec.

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RESUMO -O objetivo neste estudo foi identificar possíveis alterações na composição e no processo de compostagem dos dejetos produzidos por bovinos Canchim e Nelore em diferentes períodos do confinamento alimentados com diferentes proporções de volumoso e concentrado. O experimento foi conduzido em delineamento inteiramente casualizado em esquema fatorial com parcelas subdivididas no tempo. As parcelas foram compostas por quatro tratamentos: dejetos provenientes de duas dietas (40% de volumoso e 60% de concentrado e 60% de volumoso e 40% de concentrado) e dois genótipos (Canchim e Nelore) e as subparcelas pelos três períodos de coleta dos resíduos (início, meio e final). A eficiência do processo de compostagem foi avaliada pelas reduções de volume, sólidos totais, sólidos voláteis, frações fibrosas, carbono orgânico e temperatura, além do número mais provável de coliformes totais e termotolerantes e teores de nitrogênio e macro e microminerais. Não houve efeito do genótipo nem do período de coleta dos resíduos sobre a composição dos dejetos, no entanto o aumento da proporção de volumoso na dieta levou a menor eficiência do processo de compostagem dos dejetos. Também foram observadas reduções de 100% no número mais provável de coliformes totais e termotolerantes e aumento no teor dos nutrientes no composto final.Palavras-chave: Canchim, composto, meio ambiente, NeloreComposting of beef cattle manure: influence of period, genotype and diet ABSTRACT -The objective of this study was to identify possible alterations in composition and in the composting process of manure produced by Canchim and Nellore cattle in different periods of feedlot and fed different forage to concentrate ratios. The experiment was carried out in complete randomized design in factorial scheme with time as subdivided plot. Plots were established by four treatments: manure from two diets (40% forage and 60% concentrate and 60% forage and 40% concentrate) and two genotypes (Canchim and Nellore) and sub-plots by three periods of manure gathering (initial, intermediate and final). The efficiency of composting process was evaluated by reductions of volume, total solids, volatile solids, fibrous fraction, organic carbon and temperature, besides the most probable number of total and thermotolerant coliforms and contents of nitrogen and macro and micro minerals. There was no effect of genotype and period on manure composting; however, the increase in the roughage level in the diet promoted the lower efficiency of the process. Decrease of 100% in the most probable number of total and thermotolerant coliforms and increase in the nutrients content of the final compost were observed. IntroduçãoToda atividade produtiva tem algum impacto sobre o ambiente. As atividades agropecuárias causam mudanças físicas, químicas e biológicas cuja extensão depende do modelo de produção, pois, na maioria das vezes, os resíduos são inadequadamente utilizados ou dispostos. Em sistemas de produção de alimentos de origem animal, os modelos empregados como estratégia para aumen...

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“…Those authors observed 100% reduction, with numbers of 1.1 x 10 8 NMP g -1 in the beginning and 0 NMP g -1 at the end of composting for total and thermotolerant coliforms. Other studies, such as those of Curci et al (2007), Torres et al (2007), and Orrico et al (2007), also observed that composting was efficient to eliminate pathogenic microorganisms. The maintenance of bacterial counts in the present study may have been due to shorter fermentation time, favoring further nitrogen reduction.…”

Section: Resultsmentioning

confidence: 79%

Broiler litter reutilization applying different composting concepts

Sonoda

Moura

Bueno³

et al. 2012

Rev. Bras. Cienc. Avic.

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Broiler litter reutilization consists in using the same bedding material to cover the house floor for several broiler flocks. This requires the litter to be treated in order to reduce the amount of microorganisms, according to international recommendations. The aim of this study was to evaluate two methods of broiler litter fermentation based on composting concepts and their effect on litter and the air quality during fermentation in small-scale broiler houses. The experiment was carried out in the Environmental Laboratory I of the School of Agricultural Engineering of the State University of Campinas, utilizing six smallscale houses. Litter from the same grow-out (one, two or three) was distributed in two experimental houses, where it was either piled or spread. Before beginning the treatment, six litter samples were collected from each house and analyzed for total nitrogen content, humidity, pH and microbial counts. Litter humidity, gas emission (NH 3 and CO 2 ), environmental temperature, air relative humidity, and air velocity were determined during and after composting. Bacterial population, especially of Salmonella sp, was higher when the litter was piled compared with spread litter. However, fungi population showed a different pattern, decreasing after composting. Nevertheless, both treatments were not able to significantly reduce bacterial counts, specifically Salmonella sp, when the population before and after fermentation were compared. INTRODUCTIONThe poultry industry is one of the fastest growing sectors of global agribusiness because of the increasing demand for animal protein, including meat and eggs. However, one of the main challenges of modern poultry production is the disposal of waste, particularly of broiler litter (Bolan et al., 2010). At the same time, the poultry industry also faces litter availability problems because of the increasing demand. Therefore, different substrate types and qualities available in the market need to be used (Bigili et al., 2009).Litter is used to provide comfort to the birds and to maintain carcass quality, as it reduces the incidence of breast and footpad lesions, as well of lesions in other less commercially important parts (Oliveira et al., 2002).According to Kelleher et al. (2002), litter and waste predominantly consist of water, carbon (C), nitrogen (N) and phosphorus (P), and lower levels of chlorine (Cl), calcium (Ca), magnesium (Mg), sodium (Na), manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), and arsenic (As). These levels vary among broiler houses and regions, depending on the substrate, number of flocks reared, drinking systems, hygiene status, cleaning method, and storage (Edwards & Daniel, 1992;Jacob et al., 1997;Dao & Zhang, 2007

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Compostaje de biosólidos de plantas de tratamiento de águas residuales

Cited by 13 publications

References 0 publications

Thermal Drying and Alkaline Treatment of Biosolids: Effects on Nitrogen Mineralization

Thermal Drying and Alkaline Treatment of Biosolids: Effects on Nitrogen Mineralization

Compostagem dos dejetos da bovinocultura de corte: influência do período, do genótipo e da dieta

Broiler litter reutilization applying different composting concepts

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