Biodegradation of high phenol containing synthetic wastewater by an aerobic fixed bed reactor

Bajaj, Mini; Gallert, Claudia; Winter, Josef

doi:10.1016/j.biortech.2008.02.057

Cited by 117 publications

(53 citation statements)

References 23 publications

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“…pyridine and its derivatives) will be accumulated, which cannot be utilizable by the algae. Bacterial cultures have been verified to reduce the concentrations of these compounds in AP (Bajaj et al, 2008). For example, Nelson et al (2013) investigated the microbial utilization of AP from HTL of microalgae Nannochloropsis culata.…”

Section: Total Nitrogenmentioning

confidence: 99%

Characterization of aqueous phase from the hydrothermal liquefaction of Chlorella pyrenoidosa

Gai

Zhang

Chen

et al. 2015

Bioresource Technology

106

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h i g h l i g h t sHydrothermal liquefaction of low-lipid microalgae C. pyrenoidosa. t r a c tThis study investigated the characteristics of aqueous phase from hydrothermal liquefaction of low-lipid microalgae Chlorella pyrenoidosa. The interactions of operating conditions, including reaction temperature, retention time and total solid ratio were evaluated by response surface methodology. The chemical oxygen demand, total nitrogen and total phosphorus were selected as indicators of the property of AP. Results indicated that total solid ratio was found to be the dominant factor affecting the nutrient recovery efficiencies of AP. Based on energy recovery, GC-MS indicated that the AP at two optimized operating conditions (280°C, 60 min, 35 wt.% and 300°C, 60 min, 25 wt.%) were observed to have a higher concentration of organic acids (10.35% and 8.34%) while the sample (260°C, 30 min, 35 wt.%) was observed to have the highest concentration of N&O-heterocyclic compounds (36.16%).

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Section: Total Nitrogenmentioning

confidence: 99%

Characterization of aqueous phase from the hydrothermal liquefaction of Chlorella pyrenoidosa

Gai

Zhang

Chen

et al. 2015

Bioresource Technology

106

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“…It has been reported that phenols are inhibitory to bacteria growth at concentrations above 0.05 g/l [21], [22]. Therefore, in order to obtain efficient biodegradation, microbial acclimatization to phenol or its derivatives is necessary [21].…”

Section: Introductionmentioning

confidence: 99%

Transient Behavior in Biodegradation of 2, 4 Dichlorophenol: Is It a Starvation Effect?

Al-Khalid¹,

El‐Naas²

2013

IJCEA

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Abstract-Batch experiments were carried out to examine the biomass acclimatization during the aerobic biodegradation of 2, 4 dichlorophenol (2, 4 DCP) by Pseudomonas putida immobilized in polyvinyl alcohol (PVA) gel pellets in a bubble column bioreactor. The bacteria was acclimatized to 2, 4 DCP with concentrations of up to 200 mg/l, with and without the addition of glucose. After the acclimatization, experiments were carried out with initial 2, 4 DCP concentrations ranging from 25 to 100 mg/l. In the course of the study, a phenomenon was noticed that can be related to the effect of carbon starvation on the biodegradation ability of the bacterial cells. This paper presents the results on this phenomenon. Starved cells showed higher growth and degradation rates.

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“…Phenol has been reported for its inhibitory effect to bacteria growth at concentrations above 0.05 g L −1 (El-Naas et al, 2010b;Bajaj et al, 2008). Therefore, acclimatization (adaptation) of the microbial cultures to phenols is an important step for efficient biodegradation of these compounds due to their high toxicity to microorganisms (El-Naas et al, 2009;2010b;Bajaj et al, 2008;Al-Khalid and El-Naas, 2012;Khan et al, 2011).…”

Section: Acclimatization Of Bacteriamentioning

confidence: 99%

Biodegradation of 2, 4 Dichlorophenol

Al-Khalid¹,

El‐Naas²

2017

American Journal of Engineering and Applied Sciences

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Abstract:The present study focuses on the optimization of process parameters of the aerobic biodegradation of 2, 4 Dichlorophenol (2, 4 DCP) by a commercial strain of P. putida immobilized in PVA gel matrix, using design of experiments by Response Surface Methodology (RSM). The degradation rates obtained from these experiments were used to evaluate the effects of the main factors and their interactions during the biodegradation of 2, 4 DCP. An effective quadratic regression model predicting the rate in terms of the main independent variables, namely temperature, initial pH and initial concentration of 2, 4 DCP, was developed. The optimum conditions for DCP degradation were obtained as follows: Temperature 32.6°C, pH 5.0 and initial DCP concentration 70.5 mg L −1 , resulting in a maximum predicted degradation rate of 41.8 mg L. Under these optimized conditions, a degradation rate of 40.1 mg L −1 h −1was experimentally obtained, thus validating the model.

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Biodegradation of high phenol containing synthetic wastewater by an aerobic fixed bed reactor

Cited by 117 publications

References 23 publications

Characterization of aqueous phase from the hydrothermal liquefaction of Chlorella pyrenoidosa

Characterization of aqueous phase from the hydrothermal liquefaction of Chlorella pyrenoidosa

Transient Behavior in Biodegradation of 2, 4 Dichlorophenol: Is It a Starvation Effect?

Biodegradation of 2, 4 Dichlorophenol

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