Anaerobic treatment of slaughterhouse waste using a granular sludge UASB reactor

Sayed, S.; Campen, L. van; Lettinga, G.

doi:10.1016/0269-7483(87)90143-1

Cited by 105 publications

(48 citation statements)

References 3 publications

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“…Since the early 90's, solutions based on Up-flow Anaerobic Sludge Blanket (UASB) reactors have begun to be developed. These systems have been traditionally employed, given the interesting results achieved in terms of treatment efficiencies and energy recovery through the production of biogas, for the treatment of high strength industrial wastewaters produced for example by sugar and dairy industries, distilleries, slaughterhouses, breweries, pulp and paper and food industries [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

UASB followed by Sub-Surface Horizontal Flow Phytodepuration for the Treatment of the Sewage Generated by a Small Rural Community

2014

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Abstract:The paper presents the results of an experimental process designed for the treatment of the sewage generated by a rural community located in the north-east of Brazil. The process consists of a preliminary mechanical treatment adopting coarse screens and grit traps, followed by a biological treatment in a UASB reactor and a sub-surface horizontal flow phytodepuration step. The use of a UASB reactor equipped with a top cover, as well as of the phytodepuration process employing a porous medium, showed to present important health advantages. In particular, there were no significant odor emissions and there was no evidence of the proliferation of insects and other disease vectors. The plant achieved the following mean abatement efficiencies: 92.9% for BOD5, 79.2% for COD and 94% for Suspended Solids. With regard to fecal indicators average efficiencies of 98.8% for fecal coliforms and 97.9% for fecal enterococci were achieved. The UASB reactor showed an important role in achieving this result. The research was also aimed at evaluating the optimal operating conditions for the UASB reactor in terms of hydraulic load and organic volumetric OPEN ACCESS Sustainability 2014, 6 6999 loading. The achieved results hence indicated that the process may be highly effective for small rural communities in tropical and sub-tropical areas.

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Section: Introductionmentioning

confidence: 99%

UASB followed by Sub-Surface Horizontal Flow Phytodepuration for the Treatment of the Sewage Generated by a Small Rural Community

2014

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“…A better understanding of the microbiological and hydraulic mechanisms that regulate the system has contributed to the development of more compact and modern high-rate reactors, such as the upflow anaerobic sludge blanket (UASB), which combines operational simplicity and efficiency. Effluents generated by agro-industry, especially by meat packing, have high levels of proteins, lignocellulose compounds and fats as soluble matter and suspended solids and require preliminary treatment before they can be biologically treated (Martinez et al, 1995;Oliva et al, 1995;Sayed et al, 1987Sayed et al, , 1988a. It has been reported that a naerobic treatment of slaughterhouse wastewater at mesophilic temperatures is slowed down or impaired because of high concentrations of suspended solids (SS), particularly fat particles (Masse et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

A full-scale UASB reactor for treatment of pig and cattle slaughterhouse wastewater with a high oil and grease content

Miranda

Henriques

Monteggia

2005

Braz. J. Chem. Eng.

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-This paper discusses the performance of an 800m 3 full-scale UASB reactor in treating meatpacking plant and slaughterhouse effluents containing high concentrations of oil and grease (O&G) (413-645 mg/L), resulting in a COD/O&G ratio of 26-32%. Those macromolecules were considered responsible for the unbalance of the system resulting in a total washout of the biomass. The removal of O&G from the influent using a physicochemical system (coagulation-flocculation) improved the physical characteristics of the anaerobic sludge, controlling the biomass washout. Reactor performance was significantly improved when the COD/O&G ratio influent was maintained in the 10%. The COD and O&G removal rates obtained after implantation of the physicochemical system were 70-92% and 27-58%, respectively. The specific methanogenic activity (SMA) of the biomass shows towards a tendency stabilisation and adaptation to the substrate influent. Pretreatment of the influent allowed the maximum organic load to be increased (1.46 to 2.43 Kg COD/m 3 .d) and improved the quality of the effluent.

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“…Several factors, such as sludge flotation and inhibition due to the effect of fats and longchain fatty acids, or the adsorption of finely dispersed colloidal matter on the surface of the sludge, may cause the granulation process to be difficult or the granular sludge to deteriorate (Sayed, 1987;Rinzema, 1988;Hawkes, 1995). In addition, low gradients of substrate concentration and reduced methanogenic activity at low temperatures could enhance the negative effects of these factors.…”

Section: Introductionmentioning

confidence: 99%

Sludge granulation during anaerobic treatment of pre-hydrolysed domestic wastewater

Ligero¹,

Soto

2002

WSA

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The aim of this study was to examine sludge granulation during the anaerobic treatment of pre-hydrolysed municipal wastewater. The pretreated wastewater had a total chemical oxygen demand (CODt) of 432 ± 20 mg/l, a soluble COD (CODs) of 259 ± 8 mg/l, volatile fatty acids (VFA) of 101 ± 9 mg/l and suspended solids (SS) of 94 ± 12 mg/l. Prior to entering the digester, the influent was supplemented with sucrose, which increased the total and soluble COD by 300 mg/l. An upflow anaerobic sludge bed (UASB) digester was operated at different hydraulic retention times (HRT) ranging from 26.7 h to 2.2 h, while the organic load rate (OLR) ranged from 0.9 to 7.3 kgCOD/m 3 ·d. Sludge granulation was observed after day 150 of operation, at an HRT of 3.4 h, when small granules of less than 2 mm in size appeared. The granules had a weak structure and low density, with the specific methanogenic activity of the sludge being about 0.24 g CH 4 -COD/gVSS·d. After granulation, the digester performance was 57% CODt removal and 76% CODs removal for steady state operation at an HRT of 3.4 h and an OLR of 5.6 kgCOD/m 3 ·d.

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Anaerobic treatment of slaughterhouse waste using a granular sludge UASB reactor

Cited by 105 publications

References 3 publications

UASB followed by Sub-Surface Horizontal Flow Phytodepuration for the Treatment of the Sewage Generated by a Small Rural Community

UASB followed by Sub-Surface Horizontal Flow Phytodepuration for the Treatment of the Sewage Generated by a Small Rural Community

A full-scale UASB reactor for treatment of pig and cattle slaughterhouse wastewater with a high oil and grease content

Sludge granulation during anaerobic treatment of pre-hydrolysed domestic wastewater

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