Treatment of screened dairy manure by upflow anaerobic fixed bed reactors packed with waste tyre rubber and a combination of waste tyre rubber and zeolite: Effect of the hydraulic retention time

Umaña, Oscar; Николаева, С. В.; Sánchez, E.; Borja, R.; Raposo, F.

doi:10.1016/j.biortech.2008.01.009

Cited by 38 publications

(37 citation statements)

References 32 publications

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“…Ribas and Barana (2003) reported that a decrease in the HRT from 16.6-9.7 d increased the TS of anaerobically treated wastewater from 2.3-4.8%. Umana et al (2008) reported an increase in the TS removal efficiency from 14.6-68.8% when the HRT was increased from 1-5.5 d during the treatment of dairy manure. Rico et al (2011a) noted that the concentration of TS increased from 39.2-45.3 g L −1 as the HRT was decreased from 20-10 d during the treatment of dairy manure.…”

Section: Volatile Fatty Acidsmentioning

confidence: 99%

“…Generally, the shorter the HRT the lower the TVS reduction. De la Rubia et al (2002) reported an increase in the TVS reduction (from 53-73%) as the HRT increased from 27-75 d. Ribas and Barana (2003) reported an increase in the TVS from 1.6-4.3% in a wastewater treatment system as the HRT was decreased from 16.6-9.7 d. Umana et al (2008) reported an increase in the TVS reduction (from 26.3-78.8%) during the treatment of dairy manure as the HRT was increased from 1-5.5 d. Rico et al (2011b) noted that the concentration of TVS increased from 23.7-27.8 g L −1 during anaerobic treatment of dairy manure as the HRT decreased from 20-10 d. The reduction in the TVS obtained in this study (25.2-39.7%) were within the range reported in the literature. The diurnal cycling temperature also affected the TVS reductions, the higher the temperature the higher the TVS reduction.…”

Section: ------------------------------------------------------------mentioning

confidence: 99%

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Effect of Diurnally Cyclic Temperature on the Performance of a Continuous Mix Anaerobic Digester

Ghaly¹,

Hattab²

2011

American Journal of Biochemistry and Biotechnology

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Problem statement: Concentrated livestock production is a major contributor to environmental problems through the production of large quantity of husks on relatively small land area. Anaerobic digestion represents a valuable means of cover by these husks into methane while reducing manure pollution problems. Methodology: An experimental apparatus, including data acquisition and control system, was developed and used to investigate the effects of two diurnally cyclic temperature ranges (20-40 and 15-25°C) and four levels of hydraulic retention times (25, 20, 15 and 10 d) on the performance of anaerobic reactors operated on screened dairy manure. Results: The reactor temperature exhibited a lag relative to the chamber temperature. For the 20-40°C temperature cycles, the average lag at the maximum chamber temperature was 3.75 h while the lag at the minimum chamber temperature was 4.37 h. For the 15-25°C temperature cycle, the average lag at maximum chamber temperatures was 3.61 while the lag of the minimum chamber temperature was 4.34 h. The effluent solids content, total Kjeldahl nitrogen and ammonium nitrogen concentrations were not adversely affected by the reactor diurnally cyclic temperature. The observed values of these parameters compared fairly well with the values obtained by other researchers. The effluent total solids, volatile suspended solids, TKN, NH 4 -N and methane content of the biogas diurnally cyclic patterns were out of phase with the diurnally cyclic pattern of the reactor temperature by about 12 h under most of the investigated operating conditions. The pH and the carbon dioxide content of the biogas all exhibited a diurnally cyclic pattern which was in phase with the reactor diurnally cyclic temperature. The reductions in total solids, total suspended solids, fixed suspended solids, total Kjeldahl nitrogen, ammonium nitrogen and methane yield were all significantly affected by the diurnal temperature range and hydraulic retention time. Conclusion: The measured reactor pH followed a diurnally cyclic pattern which was in phase with the reactor temperature. At the operating temperature cycle of 20-40°C, the reactor pH ranged from 6.80-7.54 while VFA concentration ranged from 44.7-154.8 mg L .

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Section: Volatile Fatty Acidsmentioning

confidence: 99%

Section: ------------------------------------------------------------mentioning

confidence: 99%

Effect of Diurnally Cyclic Temperature on the Performance of a Continuous Mix Anaerobic Digester

Ghaly¹,

Hattab²

2011

American Journal of Biochemistry and Biotechnology

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“…However, the anaerobic digestion process in the lagoon is affected by climatic conditions (temperature) as well as the water table on the site especially since liquid can seep into underground spring and streams [95]. In recent times, with the quest for retaining active microbial population in the digester in order to improve process stability and control; biodigesters are designed with active microbial populations attached to inert supports as biofilms or form aggregates or granules [9,94]. Sakar et al [9] revealed that up flow anaerobic sludge blanket is most suitable for the anaerobic digestion of poultry wastes.…”

Section: Types Of Bio-digesters For Treating Animal Manurementioning

confidence: 99%

“…In addition, HRT also affects the quality of effluent in terms of microbial load, nutrient content as well as the methane yield. Umaňa et al [94] investigated the influence of HRT on anaerobic fixed bed reactor and noted that the quality of effluent and methane yield increased due to increase in HRT.…”

Section: Hydraulic Retention Time and Organic Loading Ratementioning

confidence: 99%

Microbial Anaerobic Digestion (Bio-Digesters) as an Approach to the Decontamination of Animal Wastes in Pollution Control and the Generation of Renewable Energy

Manyi-Loh¹,

Mamphweli²,

Meyer³

et al. 2015

Biological Treatment of Solid Waste

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Abstract:With an ever increasing population rate; a vast array of biomass wastes rich in organic and inorganic nutrients as well as pathogenic microorganisms will result from the diversified human, industrial and agricultural activities. Anaerobic digestion is applauded as one of the best ways to properly handle and manage these wastes. Animal wastes have been recognized as suitable substrates for anaerobic digestion process, a natural biological process in which complex organic materials are broken down into simpler molecules in the absence of oxygen by the concerted activities of four sets of metabolically linked microorganisms. This process occurs in an airtight chamber (biodigester) via four stages represented by hydrolytic, acidogenic, acetogenic and methanogenic microorganisms. The microbial population and structure can be identified by the combined use of culture-based, microscopic and molecular techniques. Overall, the process is affected by bio-digester design, operational factors and manure characteristics. The purpose of anaerobic digestion is the production of a renewable energy source (biogas) and an odor

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“…Perle et al (2000) analyzed the biochemistry aspects of anaerobic degradation of a dairy wastewater and reported inhibitory effects in biodegradation in relation to the presence of casein and especially regarding the levels of milk lipids. Much has been researched for the development of systems for treatment of dairy wastewater using UASB reactors; however, the effects of inhibition caused by levels of lipids and casein (low efficiency) are often discussed in the literature (Perle et al, 2000;Demirel et al, 2005;Umaña et al, 2008).…”

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confidence: 99%

Employment of factorial design to evaluate the organic loading and aeration of biological systems in the degradation of dairy wastewater

Salazar

Carrocci²,

Filho³

2011

Ambi-Agua

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Among industries producing foodstuffs, the dairy industry is notable for producing great amount of wastewater and high water consumption. Organic loading treatment based on biological degradation is a preferential treatment for dairy wastewater and effluents. However, it has some limiting factors for broader application due to the organic loading variation that results in an overload and wash-out of biological treatment systems. Considering these limitations, the organic loading and oxygen supply as factors in the rated efficiency of biological treatment systems with results expressed as removal efficiency of chemical oxygen demand (%COD removed ) were evaluated. The variables investigated were: 1) initial concentration of organic load [raw, diluted 1:1 v/v (wastewater/distilled water) and diluted 1:3 v/v (wastewater/distilled water)] and 2) aeration (with or without). A Doehlert factorial design type (2x3) was employed for these studies. Aerobics systems with organic loading at a 1:3 ratio (v/v dairy effluent /distillated water) showed elevated efficiency in biodegradation (88.31 ± 2.16 %COD removed ). The least efficient biodegradation was observed in anaerobic system for raw dairy effluent equal to 10.42 ± 3.97 %COD removed . This indicated that a dilution of effluent organic loading was necessary in obtaining greater efficiency from a biodegradation system and low hydraulic retention time.Keywords: dairy; wastewater; effluent; biodegradation; design of experiment.Emprego de planejamento fatorial para avaliação da carga orgânica e aeração de sistemas biológicos na degradação de efluente lácteo RESUMOAs indústrias de alimentos do setor de laticínios estão entre as mais poluentes que há em termos de volume de resíduos líquido gerado e pelo alto volume de água consumido. Neste contexto, os processos de degradação de matéria orgânica baseados em sistemas biológicos continuam sendo uma das opções mais promissoras para a redução da carga orgânica dos efluentes lácteos. Entretanto alguns fatores inerentes ao efluente podem levar a sobrecarga dos sistemas biológicos de tratamento e consequente ineficiência de tratamento. Neste sentido, o objetivo dessa investigação foi avaliar a influência de diferentes cargas orgânicas [efluente bruto; diluído em 1:1 (efluente lácteo: água destilada); e diluído 1:3 (efluente lácteo: água SALAZAR, R. F. S.; CARROCCI, J. S.; IZÁRIO FILHO, H. J. Employment of factorial design to evaluate the organic loading and aeration of biological systems in the degradation of dairy wastewater. Ambi-Agua, Taubaté, v. 6, n. 3, p. 98-109, 2011 . (http://dx.doi.org/10.4136/ambi-agua.522) 99 destilada)] em sistemas de tratamento biológico aerado e não aerado. Para avaliação e otimização dos sistemas empregou-se um planejamento fatorial do tipo Doehlert (2x3). Os resultados foram apresentados em termos de eficiência de remoção da demanda química de oxigênio (%DQO removido ) e verificou-se que os sistemas aeróbios com diluição 1:3 v/v (efluente lácteo / água destilada) apresentaram maior eficiênc...

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Treatment of screened dairy manure by upflow anaerobic fixed bed reactors packed with waste tyre rubber and a combination of waste tyre rubber and zeolite: Effect of the hydraulic retention time

Cited by 38 publications

References 32 publications

Effect of Diurnally Cyclic Temperature on the Performance of a Continuous Mix Anaerobic Digester

Effect of Diurnally Cyclic Temperature on the Performance of a Continuous Mix Anaerobic Digester

Microbial Anaerobic Digestion (Bio-Digesters) as an Approach to the Decontamination of Animal Wastes in Pollution Control and the Generation of Renewable Energy

Employment of factorial design to evaluate the organic loading and aeration of biological systems in the degradation of dairy wastewater

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