Biodegradation of potato slops from a rural distillery by thermophilic aerobic bacteria

Cibis, Edmund; Kent, Christopher; Krzywonos, Małgorzata; Garncarek, Zbigniew; Garncarek, Barbara; Miśkiewicz, Tadeusz

doi:10.1016/s0960-8524(02)00069-x

Cited by 35 publications

(11 citation statements)

References 12 publications

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“…When 0.05 g l −1 ZnSO 4 ·7H 2 O was added into the medium, the ethanol production was increased 10 g l −1 and glycerol was reduced to 58% of the control level. Glycerol is one of the main contributions to the chemical oxygen demand (COD) in the waste water (Cibis et al, 2002); our studies demonstrated that suitable zinc present in the culture medium can be accumulated in yeast cells and attribute to the reduced glycerol level. The decreased COD level can relieve the burden for waste-water treatment, making the ethanol fermentation process more environmentally friendly.…”

Section: Discussionmentioning

confidence: 75%

Impact of zinc supplementation on the improvement of ethanol tolerance and yield of self-flocculating yeast in continuous ethanol fermentation

Zhao

Xue

et al. 2009

Journal of Biotechnology

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Section: Discussionmentioning

confidence: 75%

Impact of zinc supplementation on the improvement of ethanol tolerance and yield of self-flocculating yeast in continuous ethanol fermentation

Zhao

Xue

et al. 2009

Journal of Biotechnology

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“…Use of low loading rates also reduces sludge production by shearing flocs allowing increased surface area for oxygen transfer. Similar removal high efficiency rates with thermophilic aerobic (50°C) biodegradation on liquid fractions of potato slops had complete removal of acetic acid and malic acid achieved (Cibis et al, 2002).…”

Section: Csrt Aerobic Biotreatment Of the Wastewatermentioning

confidence: 67%

Aerobic mesophilic treatment of potato industry wastewater

Manhokwe¹,

Parawira²,

Zvidzai³

2015

Int. J. Water Res. Environ. Eng.

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An evaluation of a laboratory-scale aerobic method for the treatment of potato-processing wastewater at 37°C was investigated. Composite samples were collected to establish batch variations. The wastewater was characterized for Chemical Oxygen Demand (COD), Permanganate Value (PV), Total Solids (TS), phosphates and pH over a period of 6 months. Wastewater with an average of 6.8 g COD/l, high concentration of total solids (up to 6725 mg/l), and low pH was subjected to active sludge treatment in a Continuously Stirred Tank Reactor (CSTR) with Organic Loading Rates (OLRs) gradually increased from 3.4 to 12.1 g COD/litre/day. Stepwise increase in OLR reduced average COD reduction from 86% at 3.4 g COD/litre/day to 76% at 12.1 g COD/litre/day. High rates of treatment efficiency (TE) were recorded at low OLRs (<6.8 g COD/litre day) with a notable pH of the effluent increasing from 4 to neutral values. TS reduction was achieved at 57% at HRT of 2 d. This study indicated that biological methods can be used for treatment of potato-processing wastewater in order to reduce the organic load and other pollutants acceptable levels for municipal discharge.

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“…The stillage used in this study contained total nitrogen concentration of 0.21 g/L and glucose concentration of 11.2 g/L. Cibis et al determined slightly higher total nitrogen (0.52–0.81 g/L) and lower reducing sugar (10.5–10.6 g/L) concentration in potato stillage. TS contained significantly higher ash concentration and therefore higher mineral element concentration, especially Zn, Fe, Mn, Ca and Mg, than BSG hydrolysate.…”

Section: Resultsmentioning

confidence: 99%

Brewers' spent grain and thin stillage as raw materials inl-(+)-lactic acid fermentation

et al. 2017

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Brewer's spent grain (BSG) hydrolysates were used for l‐(+)‐lactic acid (LA) fermentation by Lactobacillus rhamnosus ATCC 7469. In this study the effect of the addition of various amounts of thin stillage (TS) in BSG hydrolysate on LA fermentation parameters were evaluated. TS addition significantly increased utilization of glucose by up to 43.0%. In batch fermentation the highest LA concentration and volumetric productivity of 31.0 g/L, and 0.93 g/L/h, respectively, were obtained with the addition of 50% TS. L. rhamnosus cell viability also increased with the addition of 50% TS (by 2.4%). TS addition significantly increased free amino nitrogen concentration (by up to 209%) which is important for bacterial growth. A strong positive correlation between free amino nitrogen and LA concentration was noted. Compared with the results obtained in the batch fermentation (50% TS), significantly higher LA concentration, yield and volumetric productivity (54.8, 1.9 and 4.0%, respectively) were achieved in fed‐batch fermentation with glucose and TS addition. The results suggest that the combination of the by‐products of brewing and bioethanol industries could be suitable for LA production. Copyright © 2017 The Institute of Brewing & Distilling

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Biodegradation of potato slops from a rural distillery by thermophilic aerobic bacteria

Cited by 35 publications

References 12 publications

Impact of zinc supplementation on the improvement of ethanol tolerance and yield of self-flocculating yeast in continuous ethanol fermentation

Impact of zinc supplementation on the improvement of ethanol tolerance and yield of self-flocculating yeast in continuous ethanol fermentation

Aerobic mesophilic treatment of potato industry wastewater

Brewers' spent grain and thin stillage as raw materials inl-(+)-lactic acid fermentation

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