Bacterial cellulose as an oleaginous yeast cell carrier for soybean oil refinery effluent treatment and pyrolysis oil production

2020 ◽  
Author(s):  
Nan Qiao ◽  
Xue Fan ◽  
Shuang Hu ◽  
Xiuzhen Zhang ◽  
Ling Wang ◽  
...  
Keyword(s):  
Soybean Oil ◽  
Yeast Cell ◽  
Bacterial Cellulose ◽  
Oleaginous Yeast ◽  
Oil Production ◽  
Oil Refinery ◽  
Effluent Treatment ◽  
Pyrolysis Oil ◽  
Refinery Effluent ◽  
Cell Carrier

Palm oil refinery effluent treatment by sequencing batch reactors

1987 ◽  
Vol 20 (2) ◽  
pp. 101-109 ◽  
Author(s):  
K.K. Chin ◽  
W.J. Ng ◽  
A.N. Ma
Keyword(s):  
Palm Oil ◽  
Oil Refinery ◽  
Effluent Treatment ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Refinery Effluent

Comparison of hybrid ultrafiltration-osmotic membrane bioreactor and conventional membrane bioreactor for oil refinery effluent treatment

2019 ◽  
Vol 378 ◽  
pp. 121952 ◽  
Author(s):  
Priscila B. Moser ◽  
Clara Bretas ◽  
Eduardo Coutinho Paula ◽  
Clara Faria ◽  
Bárbara C. Ricci ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
Oil Refinery ◽  
Effluent Treatment ◽  
Refinery Effluent ◽  
Osmotic Membrane Bioreactor

Bacterial cellulose–alginate composite sponge as a yeast cell carrier for ethanol production

2013 ◽  
Vol 77 ◽  
pp. 103-109 ◽  
Author(s):  
Suchata Kirdponpattara ◽  
Muenduen Phisalaphong
Keyword(s):  
Yeast Cell ◽  
Ethanol Production ◽  
Bacterial Cellulose ◽  
Cell Carrier

KINETIC CONSTANTS DETERMINATION OF PETROLEUM REFINERY EFFLUENT TREATMENT IN A UASB REACTOR USING RSM

2017 ◽  
Vol 16 (1) ◽  
pp. 121-130 ◽  
Author(s):  
Seyyed Mohammad Mousavi ◽  
Seyed Omid Rastegar ◽  
Seyed Abbas Shojaosadati ◽  
Soheila Sheibani
Keyword(s):  
Petroleum Refinery ◽  
Kinetic Constants ◽  
Effluent Treatment ◽  
Uasb Reactor ◽  
Refinery Effluent ◽  
Petroleum Refinery Effluent

scholarly journals Simultaneous lipid biosynthesis and recovery for oleaginous yeast Yarrowia lipolytica

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Pratik Prashant Pawar ◽  
Annamma Anil Odaneth ◽  
Rajeshkumar Natwarlal Vadgama ◽  
Arvind Mallinath Lali
Keyword(s):  
Yarrowia Lipolytica ◽  
Oil Recovery ◽  
Oleaginous Yeast ◽  
Fermentation Broth ◽  
Continuous Production ◽  
Oil Production ◽  
Biofuel Production ◽  
Oil Yield ◽  
Microbial Oil

Abstract Background Recent trends in bioprocessing have underlined the significance of lignocellulosic biomass conversions for biofuel production. These conversions demand at least 90% energy upgradation of cellulosic sugars to generate renewable drop-in biofuel precursors (Heff/C ~ 2). Chemical methods fail to achieve this without substantial loss of carbon; whereas, oleaginous biological systems propose a greener upgradation route by producing oil from sugars with 30% theoretical yields. However, these oleaginous systems cannot compete with the commercial volumes of vegetable oils in terms of overall oil yields and productivities. One of the significant challenges in the commercial exploitation of these microbial oils lies in the inefficient recovery of the produced oil. This issue has been addressed using highly selective oil capturing agents (OCA), which allow a concomitant microbial oil production and in situ oil recovery process. Results Adsorbent-based oil capturing agents were employed for simultaneous in situ oil recovery in the fermentative production broths. Yarrowia lipolytica, a model oleaginous yeast, was milked incessantly for oil production over 380 h in a media comprising of glucose as a sole carbon and nutrient source. This was achieved by continuous online capture of extracellular oil from the aqueous media and also the cell surface, by fluidizing the fermentation broth over an adsorbent bed of oil capturing agents (OCA). A consistent oil yield of 0.33 g per g of glucose consumed, corresponding to theoretical oil yield over glucose, was achieved using this approach. While the incorporation of the OCA increased the oil content up to 89% with complete substrate consumptions, it also caused an overall process integration. Conclusion The nondisruptive oil capture mediated by an OCA helped in accomplishing a trade-off between microbial oil production and its recovery. This strategy helped in realizing theoretically efficient sugar-to-oil bioconversions in a continuous production process. The process, therefore, endorses a sustainable production of molecular drop-in equivalents through oleaginous yeasts, representing as an absolute microbial oil factory.

scholarly journals Conventional and High Resolution Chemical Characterization to Assess Refinery Effluent Treatment Performance

Chemosphere ◽  
2021 ◽  
pp. 130383
Author(s):  
M. Hjort ◽  
K.H. den Haan ◽  
G. Whale ◽  
J. Koekkoek ◽  
P.E.G. Leonards ◽  
...  
Keyword(s):  
High Resolution ◽  
Chemical Characterization ◽  
Effluent Treatment ◽  
Refinery Effluent ◽  
Treatment Performance

Evaluation of secondary refinery effluent treatment using ultrafiltration membranes

1999 ◽  
Vol 33 (9) ◽  
pp. 2172-2180 ◽  
Author(s):  
Carmen C Teodosiu ◽  
Marie D Kennedy ◽  
Henry A van Straten ◽  
Jan C Schippers
Keyword(s):  
Effluent Treatment ◽  
Ultrafiltration Membranes ◽  
Refinery Effluent

scholarly journals The use of photocatalytic degradation to improve the quality of crude refinery effluent

2018 ◽  
Author(s):  
◽  
Dushen Bisetty Naidoo
Keyword(s):  
Photocatalytic Degradation ◽  
South African ◽  
Catalyst Concentration ◽  
Phenol Degradation ◽  
Degradation Process ◽  
Effluent Treatment ◽  
Optimum Conditions ◽  
Effluent Quality ◽  
Refinery Effluent ◽  
South African Water

Water plays a fundamental role in sustaining life on Earth. Water is largely used by industries to support their processes and utilities. Through growing industrialisation, each year more and more wastewater is generated and the demand for water rises rapidly. The incorrect and unsustainable use of water is placing a great strain on the South African water supply. Much emphasis is now being placed on industries re-using and treating their effluent and wastewater. Of recent, government has placed stringent specifications for industrial effluent quality and industry find it difficult to continuously improve their effluent quality to be within acceptable limits. Crude refineries are major contributors to wastewater, producing effluent comprising largely of Oil, grease and hydrocarbon. Much focus is placed on finding alternate means of wastewater treatment to assist with the removal of oil and hydrocarbon contaminants. More effluent treatment processes need to be explored to ensure industries operate in a sustainable manner and do not place unnecessary strain on the South African water supply. Photocatalytic degradation is a wastewater treatment technique that has drawn a lot of attention in the last decade. This is an Advanced Oxidation Process (AOP) which involves the production of a hydroxyl radical (OH-) which is then used for the degradation of organic contaminants. The degradation converts the organic pollutants into CO2 and H2O. A synthetic crude refinery effluent was developed and underwent the photocatalytic degradation process. The catalyst concentration was varied at 2 g/L, 5 g/L and 8 g/L. The oxidation reaction took place over time intervals of 30, 60 and 90 minutes and aeration to the reaction vessel was supplied at 0.768 L/min, 1.11 L/min and 1.48 L/min. This photodegradation took place under UV light conditions. The degradation process was conducted with the aim of evaluating the degradation of oil and phenol in crude refinery effluent. Sulphates were also monitored to observe if an effect was noticed. Design of Experiment (DOE) involved the development of experimental run matrices for a multilevel factorial design, Central Composite Design (CCD) and Box-Behnken Design (BBD) model. Randomized runs were then conducted as per the design matrix for each model. Model verification and evaluation was then conducted and the best suited degradation models were selected. It was observed that the best fitted model for the degradation of oil in water was the BBD. The best design model for phenol degradation was the CCD. Throughout the photocatalytic degradation process, it was noted that no change took place with the sulphates. The models were then optimised to determine the optimum degradation conditions. This was carried out using Response Surface Methodology (RSM) techniques. The CCD model yielded a combined oil and phenol degradation of 71.5%. This occurred at a catalyst concentration of 2.07g/L, a run time of 90 minutes and an air flow rate of 0.768L/min. The BBD model produced a combined oil and phenol degradation of 68%. This took place at a catalyst concentration of 2 g/L, a run time of 30 minutes and an air flow rate of 1.04 L/min. pH were monitored throughput the degradation process and both these models yielded output products within the stipulated pH band. The testing of a local crude refinery effluent was conducted using the CCD and BBD optimum conditions. When using the CCD optimum conditions degradation of 76.98% and 84.21% was observed for both oil and phenol respectively. The BBD optimum conditions yielded a degradation of 83.33% for oil and 78.95% for phenol. This indicated that the photocatalytic process can be considered for degrading crude refinery effluent as its products met the specifications of municipal industrial waste water. The above results clearly indicate a positive outcome for the treatment method of photocatalytic degradation on the synthetic crude refinery effluent. This technique can therefore be further explored when considering crude effluent treatment and the treatment advantages should be used by all industries to improve effluent quality and allow for more sustainable and environmentally friendly operations.

Sign in / Sign up

Export Citation Format

Share Document