Complex Effluent Streams as a Potential Source of Volatile Fatty Acids

Zacharof, Myrto-Panagiota; Lovitt, Robert W.

doi:10.1007/s12649-013-9202-6

Cited by 141 publications

(89 citation statements)

References 106 publications

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“…Although its production is carbon neutral, mining P is gradually becoming more costly and supply risks, related to environmental and socio-political issues, have risen. It has been reported that by 2035 the demand for P will outpace the supply as the finite resource becomes increasingly expensive (800 % rise between 2006 ($50) and 2008 ($400), current value of over $500/tonne) On the other hand, P removal from wastewater has to improve as water discharge standards become more stringent, raising the costs of wastewater treatment [30]. Substantial value also exists in the high content of metal ions in numerous agricultural and industrial wastes.…”

Section: Energy and Commodities Formation From Alternate Origins: Thementioning

confidence: 99%

“…It has a large production carbon footprint (best practice being 2.2 tonnes of CO 2 per tonne of ammonia), as during its synthesis methane is reformed to produce H 2 and CO 2 . In addition, the disposal and return of ammonia to the atmosphere through nitrification and denitrification adds additional costs to wastewater treatment [30].…”

Section: Energy and Commodities Formation From Alternate Origins: Thementioning

confidence: 99%

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Grape Winery Waste as Feedstock for Bioconversions: Applying the Biorefinery Concept

Zacharof

2016

Waste Biomass Valor

Self Cite

138

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Grape wine is among the most important alcoholic beverages in the globe, with a continuously rising world demand, currently sizing at 25 billion litres. Such a large and heavily industrialised market calls for the maintenance of a steady production of raw materials to end products. Consequently, intensive cultivation of land, harvesting of the goods and manufacturing for the production of commercially available products are being implemented. Wine making is a timed, multistage process producing a large amount of organic and inorganic waste. It has been calculated that during cultivation and harvesting about 5 tonnes of solid waste are generated per hectare per year, while the winery wastewater varies according to the production size from 650,000 m 3 (Greece) to over 18,000,000 m 3 (Spain) per year. Conventional treatments of winery waste are becoming increasingly expensive, demanding significant amounts of effort, resources and energy for safe waste discharge. Therefore, the need to recycle, reuse and recover energy and valuable chemicals from winery waste and wastewater becomes apparent. Valorisation of winery waste is possible when introducing the concept of biorefinery, i.e. the use of winery waste as bioconversions feedstock in order to produce platform chemicals, biofuels, heat and energy.

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Section: Energy and Commodities Formation From Alternate Origins: Thementioning

confidence: 99%

Section: Energy and Commodities Formation From Alternate Origins: Thementioning

confidence: 99%

Grape Winery Waste as Feedstock for Bioconversions: Applying the Biorefinery Concept

Zacharof

2016

Waste Biomass Valor

Self Cite

138

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“…The carbon based economy, in the developed Western world is challenged due to fossil fuel scarcity and socioeconomic changes, constituting the formation of petroleum distillates, such as acetic and butyric acid from alternative sources an attractive option [2]. The production of carboxylic acids by fermentation, within the biorefinery concept ergo the biobased conversion of waste, plant biomass and other materials is becoming an effective choice applied to bench, pilot and industrial scale [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Intensive Production of Carboxylic Acids Using <em>Cl. butyricum</em> in a Membrane Bioreactor (MBR)

Tajarudin¹,

Zacharof²,

Ratanapongleka³

et al. 2018

Preprint

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This work reports of the use of a bench scale chemostat (CSTR) in continuous mode and of a pilot scale membrane bioreactor (MBR) in fed-batch mode to intensively produce acetic and butyric acids using Cl. butyricum grown on synthetic media. These studies were then used to perform a cost estimation study of the MBR system to assess the potential economic impact of this proposed methodology. The MBR system was found highly productive reaching 37.88 g L -1 h-1 of acetic and 14.44 g L -1 h -1 of volumetric cell productivity, favoring acetic acid production to butyric at a ratio 3:1. The cost of preparation and production of carboxylic acids using this system was found as 0.0062 £PS/kg respectively and an up to 99% carbon recovery.

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“…There are numerous criteria that have to be met so to successfully utilise these materials as growth media. A paramount step is the removal of particulate matter and consequently sanitize the materials that can be stabilized and formulated to ensure efficient their utilization [7]. To achieve this, these streams have to be solubilised, fractionated , concentrated and reformulated [8].…”

Section: Introductionmentioning

confidence: 99%

“…Within this context, membrane filtration can offer feasible options towards an economical recovery, fractionation and concentration of these materials ( Figure 1) providing many routes to valorise these materials [9].…”

Section: Introductionmentioning

confidence: 99%

The use of membrane technology for the formulation of spent anaerobic digester effluents as a nutrient source for bacterial growth

Zacharof¹,

Vouzelaud²,

Lovitt³

2014

WIT Transactions on Ecology and the Environment

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Spent digester effluents were formulated into nutrient media , suitable for microbial growth of industrially important microorganisms, using filtration and diafiltration. The waste effluents were pretreated by dilution, sedimentation and sieving for the removal of large particulate material. The scheme used allowed the successful formulation particle, free sterile effluents, with an N:P ratio 36.6 The prepared microfiltered effluents were then physicochemically characterized before being assessed for their utilization as growth substrates of microorganism associated with chemical and fuels production. Microfiltered treated digested propagated with Escherichia coli NCIMB 8277, agricultural sludge based media were compared with in vitro media when supplied with or without addition carbohydrate sources. in bench scale batch aerobic. Good growth was achieved compared to synthetic growth media with the microorganism using filtrates. When the treated effluents were supplied with 2% w/v glucose solution a significant improvement in the growth rates and growth yields was achieved giving comparable performance with the synthetic media.

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Complex Effluent Streams as a Potential Source of Volatile Fatty Acids

Cited by 141 publications

References 106 publications

Grape Winery Waste as Feedstock for Bioconversions: Applying the Biorefinery Concept

Grape Winery Waste as Feedstock for Bioconversions: Applying the Biorefinery Concept

Intensive Production of Carboxylic Acids Using <em>Cl. butyricum</em> in a Membrane Bioreactor (MBR)

The use of membrane technology for the formulation of spent anaerobic digester effluents as a nutrient source for bacterial growth

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