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Buers, K.L.M.; Prince, E.L.; Knowles, Christopher J.

doi:10.1023/a:1018300628816

Cited by 17 publications

(3 citation statements)

References 7 publications

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“…With concentrations around 1% (w v -1 ), TEA represents the major carbon and nitrogen source in many cooling liquid circuits (CLC) of various production sites, leading to selective enrichment and accumulation of TEA degrading bacteria. Although biodegradability can be seen as advantageous for the disposal after use (Buers et al 1997), TEA degraders need to be identified and studied in more detail in order to control deterioration processes and bacterial colonization during its industrial application. In particular, bicine (C 6 H 13 NO 4 ) is considered an undesired degradation product that may accelerate equipment corrosion.…”

Section: Introductionmentioning

confidence: 99%

Microbiota in a cooling-lubrication circuit and an option for controlling triethanolamine biodegradation

2018

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Cooling and lubrication agents like triethanolamine (TEA) are essential for many purposes in industry. Due to biodegradation, they need continuous replacement, and byproducts of degradation may be toxic. This study investigates an industrial (1,200 m³) cooling-lubrication circuit (CLC) that has been in operation for 20 years and is supposedly in an ecological equilibrium, thus offering a unique habitat. Next-generation (Illumina Miseq 16S rRNA amplicon) sequencing was used to profile the CLC-based microbiota and relate it to TEA and bicine dynamics at the sampling sites, influent, machine rooms, biofilms and effluent. Pseudomonas pseudoalcaligenes dominated the effluent and influent sites, while Alcaligenes faecalis dominated biofilms, and both species were identified as the major TEA degrading bacteria. It was shown that a 15 min heat treatment at 50°C was able to slow down the growth of both species, a promising option to control TEA degradation at large scale.

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Section: Introductionmentioning

confidence: 99%

Microbiota in a cooling-lubrication circuit and an option for controlling triethanolamine biodegradation

2018

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“…In 1941 Lee and Chandler investigated the microbial growth in MWF and isolated bacteria from fresh and used emulsions [7]. Further publications on the topic of microbial contamination of MWF are from the middle [8][9][10][11] and the end of the last century [12][13][14][15][16] and are still in the focus of actual scientific publications [17][18][19][20][21][22][23][24]. Due to the fact that some MWF components can be used as a carbon-and energy source by MO and are not simultaneously consumed [25], the physical and chemical changes caused by microbial degradation are hardly predictable.…”

Section: Introductionmentioning

confidence: 99%

Microorganisms as a Replacement for Metal Working Fluids

Redetzky

Rabenstein

Palmowski

et al. 2014

AMR

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Most of the several billion liters of metalworking fluid (MWF) used worldwide and annually are water-based and thus prone to a microbial contamination. The microbial growth leads to a deterioration and therefore to a loss of quality and technical performance. In most cases, biocides, which pose a potential risk to health and environment, are used to reduce the microbial load. To avoid these limitations, the paradigm shift of using microorganisms in a positive way in a manufacturing process as a lubricant is investigated in this paper. Some microorganisms are able to synthesize equivalent MWF components like e.g. fatty acids or sulfur compounds. Due to this fact, it is possible to create a regenerative system on a microbiological basis for the substitution of mineral oil containing MWF components. To demonstrate the lubrication potential of bacteria, preliminary investigations were conducted on a Brugger-tribotester. Against this background, the approach presented here intends to investigate the lubrication properties of special microorganisms and the influence of the microbial cell counts on the lubrication behavior respectively. The results of the tribological tests show that the microbial-suspensions exhibit Brugger-values as high as highly concentrated conventional MWF and indicate the potential to replace these respective components.

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“…Until recently biocidial qualities of borate esters were believed to prevent them functioning as growth substrates for bacteria. However, the utilization of amine borates has been shown to occur (2,15). Biodegradation of monoethanolamine (6, 10, 11), diethanolamine (9) and triethanolamine (4,16) has been demonstrated.…”

Section: Introductionmentioning

confidence: 99%