Reverse osmosis processing of organic model compounds and fermentation broths

Diltz, Robert; Marolla, Theodore V.; Henley, Michael V.; Li, Lixiong

doi:10.1016/j.biortech.2006.01.022

Cited by 38 publications

(15 citation statements)

References 21 publications

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“…Instead, in this study, the behaviors of these dissolved organic compounds were not determined. By the use of RO post-treatment, Li and his co-workers [27] recently explored the rejections of six organic compounds typically presenting in the fermentation broth, which had some similarities with the wastewater characteristics in the present study. Based on their report, the rejections of organic acids by thin-film composite polyamide RO membrane, which was chemically the same as the membrane material used in this study were mostly up to 90%, yielding an overall rejection of total organic carbon 95.5%.…”

Section: Ionic Rejectionmentioning

confidence: 91%

Purification of UF-treated anaerobically digested manure wastewater by two-pass reverse osmosis

Guo

Jin

2013

Desalination and Water Treatment

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A B S T R A C TMembrane technology provides a potential promise towards manure treatment as well as nutrients concentration and recovery in the livestock industry. A two-pass reverse osmosis (RO) system was described in this study for the purification of UF-treated anaerobically digested manure wastewater (ADMW) with respect to permeate flux, ionic rejection, permeate quality, and membrane cleaning. The permeate flux fluctuated at 26.6-33.4 and 73.7-91.2 L m À2 h À1 for the first-and second-pass RO processing, respectively, at operating pressure of 1,500 kPa in the temperature range of 24-34˚C. The overall rejections of both Na + and K + by the two-pass RO were greater than 99%, whereas in case of ammonia, it was approximately 88%. The significant presence of molecular NH 3 at relatively high pH in ADMW solution probably induced a lower rejection of total ammonium, which also largely led to the low rejection of alkalinity and further pH increase in the RO permeate. The twopass RO treatment afforded a complete rejection of Cl À . The overall rejections of dissolved solids (DS) were estimated to be 94% with the first-pass RO and 98.8% after the two-pass RO resulting in product water containing only 45 mg/L of DS. Chemical cleaning of used membrane was successfully performed by successive flush of specific acid and base cleaning agents.

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Section: Ionic Rejectionmentioning

confidence: 91%

Purification of UF-treated anaerobically digested manure wastewater by two-pass reverse osmosis

Guo

Jin

2013

Desalination and Water Treatment

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“…Ditlz et al 12) also found that the rejection of lactic acid increased with increasing transmembrane pressure.…”

Section: Effect Of Feed Velocity On Permeate Fluxmentioning

confidence: 91%

Separation and Concentration of Lactate from Cassava Fermentation Broth by Reverse Osmosis

2010

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A reverse osmosis experiment was performed to separate and concentrate lactate from cassava fermentation broth.Pure lactic acid and ammonium lactate solutions were also used as model solutions. The influence of operating conditions, including feed velocity, transmembrane pressure and feed concentration, on the filtration properties (permeate flux, rejection and osmotic pressure) were studied. The concentration factor of lactic acid during batch operation of reverse osmosis was also evaluated. In the laminar flow regime, permeate flux increased with increasing of feed velocity due to concentration polarization of the solute on the membrane surface. However, the permeate flux was not affected by feed velocity in the turbulent regime. Permeate flux and rejection increased with transmembrane pressure and decreased with feed concentration due to higher osmotic pressure. At a transmembrane pressure of 5.5MPa and an initial feed velocity of 0.7 m/s, lactic acid in the model solutions could be concentrated from three to six times; however, the concentration factor in fermentation broth only reached two. The degree of concentration increase of lactic acid was affected by the presence of medium and residual sugar in the fermentation broth, as both may contribute to the increase of osmotic pressure and also polarize the concentration effect that occurs on the membrane surface.

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“…For improving solid-liquid separation, flocculation or precipitation agents are commonly applied. For nutrient recovery, membrane technology, e.g., ultrafiltration and reverse osmosis, are used (Diltz et al 2007;Fakhru'l-Razi 1994). Membrane filtration produces a nutrient concentrate and purified process water (Castelblanque and Salimbeni 1999;Klink et al 2007).…”

Section: Impacts Of Byproducts On the Sustainability Of Bio-energiesmentioning

confidence: 98%

Recent Developments in Bio-Energy Recovery Through Fermentation

Braun¹,

Drosg²,

Bochmann³

et al. 2009

Microbes at Work

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Bio-energy recovery through fermentation is gaining importance because of limited fossil resources. Especially, bio-ethanol and biogas production are applied worldwide and have reached industrial scale. Other options such as bio-hydrogen, microbial fuel cells, and higher alcohol and acid fermentations are still in development. Current fields of intense research are the utilization of lignocellulose substrates, intensification of the recovery of wastes and industrial byproducts for bioenergy recovery, optimization of process control (especially, in anaerobic digestion), and the optimal utilization scenario of byproducts from microbial bio-energy processes (e.g., stillage, digestate). For lignocellulose utilization, the optimal pretreatment technologies (heat, acid, enzyme, steam explosion, mechanical treatment) are being investigated. For methane production, benchmarks for fermentation parameters are presented, and current bottlenecks and deficiencies of the technology are discussed.As biomass is not only needed for energy conversion, but also for other purposes (food production, animal feed, raw material for industry), the conversion efficiency from sunlight via plants to biomass and biofuels has to be enhanced. For this reason, research also focuses on increasing yields, improving conversion technologies, usage of the entire plant biomass, and improving the entire energy conversion system. Mass and energy balances, net energy balances, and combined heat and power usage are also considered.Current research tries to evaluate eco balances, greenhouse gas emissions, and the sustainability of the entire production process, in order to improve the entire conversion systems. In summary, microbial bio-energy conversion systems will be of great importance as part of a future energy mix, until alternative energy sources like direct conversion of sunlight (e.g., photovoltaics), nuclear technology (e.g., fusion), or other future energy sources can replace it. Contents

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Reverse osmosis processing of organic model compounds and fermentation broths

Cited by 38 publications

References 21 publications

Purification of UF-treated anaerobically digested manure wastewater by two-pass reverse osmosis

Purification of UF-treated anaerobically digested manure wastewater by two-pass reverse osmosis

Separation and Concentration of Lactate from Cassava Fermentation Broth by Reverse Osmosis

Recent Developments in Bio-Energy Recovery Through Fermentation

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