Anaerobic digestion elutriated phased treatment of piggery waste

Ahn, Youngho; Bae, Jung Hoon; Park, S.-M.; Min, K.-S.

doi:10.2166/wst.2004.0752

Cited by 13 publications

(8 citation statements)

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“…From the initial pH 10 test, the pH was slightly reduced from 10 to 9.1 during the initial 12 h possibly due to the low acidogenesis, compared to other pH conditions. Regardless of what the initial pH was (4)(5)(6)(7)(8)(9) in the experiments, the pH changed with time, and the final pH was between 4.5 and 5.9. Figure 2.…”

Section: Hydrogen Yield Under Various Phs Conditionmentioning

confidence: 98%

“…The pHs (7,8,9) in reactors were dropped immediately except at pH 10 when hydrogen fermenter was started (Figure 2). A drop of pH in the reactors is possibly due to volatile fatty acid (VFA) accumulation and weak buffering capacity.…”

Section: Hydrogen Yield Under Various Phs Conditionmentioning

confidence: 99%

“…In addition, a few results showing successful biohydrogen fermentation using real waste have been reported, and the hydrogen yield was much lower than with the pure feed [5]. In particular, biohydrogen fermentation from high strength piggery waste showed low energy recovery [13,28,29], even though piggery waste is considered as an attractive source for bioenergy harvesting [9]. Figure 6 shows the batch mode experimental results of the effect of high BA using raw piggery waste (8.9 g CaCO3/L, pH 8.7).…”

Section: Ba In High Strength Piggery Wastementioning

confidence: 99%

“…Cai et al [8] showed that the maximal hydrogen yield from sewage sludge occurred at an initial pH of 11.0. In an acid elutriation fermenter treating municipal primary sludge and slurry-type piggery waste, the maximal activity of hydrolysis and acidogenesis was pH 9 under both mesophilic (35 °C ) and thermophilic (55 °C ) conditions [9,10]. Under these conditions, the main reaction byproducts in the semi-continuous experiments were acetate, propionate and butyrate, and the ratio was 1:0.35-0.37:0.28-0.31 for mesophilic conditions and 1:0.23-0.36:0.16-0.28 for thermophilic conditions.…”

Section: Introductionmentioning

confidence: 99%

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Biohydrogen Fermentation from Sucrose and Piggery Waste with High Levels of Bicarbonate Alkalinity

Choi

Ahn

2015

Energies

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This study examined the influence of biohydrogen fermentation under the high bicarbonate alkalinity (BA) and pH to optimize these critical parameters. When sucrose was used as a substrate, hydrogen was produced over a wide range of pH values (5-9) under no BA supplementation; however, BA affected hydrogen yield significantly under different initial pHs (5-10). The actual effect of high BA using raw piggery waste (pH 8.7 and BA 8.9 g CaCO3/L) showed no biogas production or propionate/acetate accumulation. The maximum hydrogen production rate (0.32 L H2/g volatile suspended solids (VSS)-d) was observed at pH 8.95 and 3.18 g CaCO3/L. BA greater than 4 g CaCO3/L also triggered lactate-type fermentation, leading to propionate accumulation, butyrate reduction and homoacetogenesis, potentially halting the hydrogen production rate. These results highlight that the substrate with high BA need to amend adequately to maximize hydrogen production.

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Section: Hydrogen Yield Under Various Phs Conditionmentioning

confidence: 98%

Section: Hydrogen Yield Under Various Phs Conditionmentioning

confidence: 99%

Section: Ba In High Strength Piggery Wastementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Biohydrogen Fermentation from Sucrose and Piggery Waste with High Levels of Bicarbonate Alkalinity

Choi

Ahn

2015

Energies

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“…The reactor achieved good removal efficiencies and stability at OLR between 1.1-6.8 g COD/l•d. Ahn et al (2004a) developed a novel high-rate anaerobic digestion elutriated phased treatment (ADEPT) process for treating a slurry-type piggery waste.…”

Section: Industrial Waste Treatmentmentioning

confidence: 99%

Anaerobic Processes in Waste Treatment

Chen¹,

Ji²

2005

Water Environment Research

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Anaerobic digestion is a biochemical conversion technology that can substantially destroy complex organic matter in wastes. When used in a fully engineered system, anaerobic digestion not only provides pollution prevention, but also allows for sustainable energy and nutrient recovery. As the technology continues to mature, anaerobic digestion is becoming a key method for both waste reduction and recovery of a renewable fuel and other valuable co-products. The main objective of this article is to provide an overview of the recent research on the anaerobic digestion of agricultural, industrial, and municipal wastes. Information of the recent development in anaerobic microbiology and mathematical modeling is also covered in the article. GeneralCelis-Garcia et al. (2004) evaluated the granular sludge and biofilm for their susceptibility to sulfide and dissolved oxygen. It was found that both sulfate reduction and methanogenesis in attached biomass exhibited a better tolerance to high concentrations of total sulfide and dissolved oxygen than those in granular sludge. The better performance of biofilm was attributed to the selective attachment of biomass. (2004) summarized the existing sludge treatment processes with a 1348 focus on the valuable use of organic carbon compounds as an energy source. Lahav and Morgan (2004) reviewed the titration measurement of volatile fatty acids (VFA) and carbonate alkalinity concentrations for monitoring of anaerobic digestion processes. Jordao and Volschan (2004) summarized the cost-effective solutions, particularly chemical enhanced primary treatment and upflow anaerobic sludge bed (UASB) process, for sewage treatment in Brazil. Angenent et al. (2004) reviewed the biological processing strategies that can produce bioenergy or biochemicals while treating industrial and agricultural wastewater. Yin et al. (2004) reviewed the dewaterability and the ultrasound pretreatment of bio-sludge. Yadvika et al. (2004) reviewed the different techniques that could be used to enhance the gas production rate from solid substrates. Rulkens (2004) presented a survey of the sludge treatment options that can eliminate the risks for environment and recover the valuable compounds in the sludge. Brief assessment was also given of the specific future technological development. Odegaard (2004) reviewed the sludge minimization technologies including mechanical, chemical, physical, and biological methods. Azbar et al. (2004) reviewed treatment and disposal alternatives of olive oil mill wastes. Rulkens and Biens

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Automatic initialisation of buffer composition estimation for on-line analysis of unknown buffer solutions

Zaher

Vanrolleghem

2005

Anal Bioanal Chem

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An automatic initialisation procedure for extracting useful information about buffer composition from a titration experiment is presented in this paper. The initialisation procedure identifies which buffering components are present in the sample from a relatively long list of buffers expected in the system monitored. The procedure determines approximate pKa values of the buffers and evaluates their maximum and minimum concentrations. This information is then used to start an optimisation procedure to fit the model of the buffer components to the titration data and to accurately determine buffer concentrations and pKa values. The procedure has been integrated as a software layer around the buffer capacity optimum model builder (BOMB) that fits a buffer-capacity model to a measured buffer-capacity curve to estimate model properties (pKa values and concentrations). The reliability and robustness of the resulting buffer capacity software (BCS) were tested using a titrimetric analyser simulator (TAS). The BCS was then validated off-line and on-line.

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Anaerobic digestion elutriated phased treatment of piggery waste

Cited by 13 publications

References 0 publications

Biohydrogen Fermentation from Sucrose and Piggery Waste with High Levels of Bicarbonate Alkalinity

Biohydrogen Fermentation from Sucrose and Piggery Waste with High Levels of Bicarbonate Alkalinity

Anaerobic Processes in Waste Treatment

Automatic initialisation of buffer composition estimation for on-line analysis of unknown buffer solutions

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