A new approach of pellet formation of a filamentous fungus -Rhizopus oryzae.

doi:10.1016/J.BIORTECH.2006.10.028

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A new approach of pellet formation of a filamentous fungus -Rhizopus oryzae.

Journal Article•DOI•

A new approach of pellet formation of a filamentous fungus -Rhizopus oryzae.

Wei Liao¹, Yan Liu¹, Craig Frear¹, Shulin Chen¹•Institutions (1)

Washington State University¹

01 Dec 2007-Bioresource Technology (Elsevier)-Vol. 98, Iss: 18, pp 3415-3423

TL;DR: A new approach to form pellets has been developed using only potato dextrose broth, soybean peptone, and calcium carbonate allowing for pellet size to be controlled by adjusting inoculum size and the concentrations of potato deXTrose broth.

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About: This article is published in Bioresource Technology.The article was published on 2007-12-01. It has received 101 citations till now. The article focuses on the topics: Rhizopus oryzae & Pellet.

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Journal Article•DOI•

Microbial production of organic acids: expanding the markets.

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Michael Sauer, Danilo Porro¹, Diethard Mattanovich, Paola Branduardi¹•Institutions (1)

University of Milan¹

01 Feb 2008-Trends in Biotechnology

TL;DR: Through analysis of the current advances in production of citric, lactic and succinic acid production, guidelines for future developments in this fast-moving field are presented.

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750 citations

Journal Article•DOI•

Novel Fungal Pelletization-Assisted Technology for Algae Harvesting and Wastewater Treatment

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Wenguang Zhou¹, Yanling Cheng¹, Yanling Cheng², Yun Li¹, Yun Li³, Yiqin Wan³, Yuhuan Liu¹, Xiangyang Lin⁴, Roger Ruan¹, Roger Ruan³ - Show less +6 more•Institutions (4)

University of Minnesota¹, Beijing Union University², Nanchang University³, Fuzhou University⁴

27 Apr 2012-Applied Biochemistry and Biotechnology

TL;DR: The results showed that pH was the key factor affecting formation of fungi–algae pellet, and pH could be controlled by adjusting glucose concentration and fungal spore number added, and the best pelletization happened when adding 20 g/L glucose and approximately 1.2E8/L spores in BG-11 medium.

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Abstract: A novel fungi pelletization-assisted bioflocculation technology was developed for efficient algae harvesting and wastewater treatment. Microalga Chlorella vulgaris UMN235 and two locally isolated fungal species Aspergillus sp. UMN F01 and UMN F02 were used to study the effect of various cultural conditions on pelletization process for fungi–algae complex. The results showed that pH was the key factor affecting formation of fungi–algae pellet, and pH could be controlled by adjusting glucose concentration and fungal spore number added. The best pelletization happened when adding 20 g/L glucose and approximately 1.2E8/L spores in BG-11 medium, under which almost 100 % of algal cells were captured onto the pellets with shorter retention time. The fungi–algae pellets can be easily harvested by simple filtration due to its large size (2–5 mm). The filtered fungi–algae pellets were reused as immobilized cells for treatment wastewaters and the nutrient removal rates of 100, 58.85, 89.83, and 62.53 % (for centrate) and 23.23, 44.68, 84.70, and 70.34 % (for diluted swine manure wastewater) for ammonium, total nitrogen, total phosphorus, and chemical oxygen demand, respectively, under both 1- and 2-day cultivations. The novel technology developed is highly promising compared with current algae harvesting and biological wastewater treatment technologies in the literature.

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209 citations

Cites background from "A new approach of pellet formation ..."

...Various factors have been discovered to influence the pellet formation, including culture medium, pH and initial inoculum spore number, and so forth [13, 14, 34]....
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...Since COD is commonly used to indirectly measure the amount of organic compounds in wastewater, it suggests that the organic carbon could be utilized by both algae and fungal species [14, 31]....
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...oryzae for growing small, smooth pellets during the culture [14]....
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...Filamentous fungi can be widely used to produce many bioproducts and biofuels [13, 14], and it can be grown in submerged cultures in different morphological forms including suspended mycelia, clumps, or pellets [15]....
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...[14] found that filamentous fungi could grow well when supplied with organic carbon in the medium....
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Journal Article•DOI•

Fungal pelleted reactors in wastewater treatment: Applications and perspectives

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Erika J. Espinosa-Ortiz¹, Eldon R. Rene¹, Kannan Pakshirajan², Eric D. van Hullebusch³, Piet N.L. Lens¹ - Show less +1 more•Institutions (3)

UNESCO-IHE Institute for Water Education¹, Indian Institute of Technology Guwahati², University of Paris³

01 Jan 2016-Chemical Engineering Journal

TL;DR: This review presents the mechanisms involved in the formation and growth of fungal pellets as well as the different factors that influence the stability of the pellets, and discusses the different organic and inorganic pollutants treated using fungal pelleted reactors.

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176 citations

Cites background from "A new approach of pellet formation ..."

...The inoculum size also impacts the pelleted growth [22], and an inversely proportional relationship was reported between the amount of inoculum used and pellet size [27]....
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...Previous studies have reported the formation of biomass pellets during the growth of different filamentous fungal cultures, including Cladosporium cladosporoides, Aspergillus nidulans, Rhizopus oryzae, Anthracophyllum discolor, Trichoderma reesei and Pleurotus ostreatus [21–24]....
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Journal Article•DOI•

Filamentous fungi assisted bio-flocculation: A novel alternative technique for harvesting heterotrophic and autotrophic microalgal cells

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Wenguang Zhou¹, Min Min¹, Bing Hu¹, Xiaochen Ma¹, Yuhuan Liu¹, Wang Qin¹, Jian Shi¹, Paul Chen¹, Roger Ruan¹ - Show less +5 more•Institutions (1)

University of Minnesota¹

02 Apr 2013-Separation and Purification Technology

TL;DR: The novel harvesting technology developed in this study might reduce the microalgae harvesting cost and will have potential to be applied to all types ofmicroalgae species as alternative to other traditional harvesting methods.

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168 citations

Journal Article•DOI•

White-rot fungal conversion of wheat straw to energy rich cattle feed

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Bhuvnesh Shrivastava¹, Shilpi Thakur, Yogender Pal Khasa¹, Akshaya Gupte, Anil Kumar Puniya², Ramesh Chander Kuhad¹ - Show less +2 more•Institutions (2)

University of Delhi¹, National Dairy Research Institute²

01 Jul 2011-Biodegradation

TL;DR: Results suggest that the fungal fermentation of wheat straw effectively improved CP content, OM digestibility, SCFAs production, ME value and simultaneously lowered the C/N ratio, thus showing potential for bioconversion of lignin rich wheat straw into high energy cattle feed.

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Abstract: In order to improve the digestibility and nutrient availability in rumen, wheat straw was subjected to solid state fermentation (SSF) with white-rot fungi (i.e. Pleurotus ostreatus and Trametes versicolor) and the fermented biomass (called myco-straw) was evaluated for biochemical, enzymatic and nutritional parameters. The fungal treatment after 30 days led to significant decrease (P < 0.05) in cell wall constituents viz, acid detergent fiber (ADF), neutral detergent fiber (NDF), hemicellulose, lignin and cellulose to the extent of 35.00, 38.88, 45.00, 37.48 and 37.86%, respectively in P. ostreatus fermented straw, while 30.04, 33.85, 39.90, 31.29 and 34.00%, respectively in T. versicolor fermented straw. However, maximum efficiency of fermentation in terms of low carbohydrate consumption per unit of lignin degradation, favoring cattle feed production was observed for P. ostreatus on the 10th day (17.12%) as compared with T. versicolor on the 30th day (16.91%). The myco-straw was found to contain significantly high (P < 0.05) crude protein (CP; 4.77% T. versicolor, 5.08% P. ostreatus) as compared to control straw (3.37%). Metabolizable energy (ME, MJ/kg DM), percent organic matter digestibility (OMD) and short chain fatty acids (SCFAs; mmol) production also increased considerably from control straw (4.40, 29.91 and 0.292) to a maximum up to P. ostreatus fermented straw (4.92, 33.39 and 0.376 on 20th day) and T. versicolor fermented straw (4.66, 31.74 and 0.334 on 10th day), respectively. Moreover, the myco-straw had lower organic carbon and was rich in nitrogen with lower C/N ratio as compared to control wheat straw. Results suggest that the fungal fermentation of wheat straw effectively improved CP content, OM digestibility, SCFAs production, ME value and simultaneously lowered the C/N ratio, thus showing potential for bioconversion of lignin rich wheat straw into high energy cattle feed.

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138 citations

Cites background from "A new approach of pellet formation ..."

...…fungal pellets as inoculum has been reported to be advantageous as compared to filamentous inoculum in obtaining decreased viscosity, desirable mixing, better mass and oxygen transfer into the biomass and lower energy consumption for aeration and agitation (Suijdam et al. 1980; Liao et al. 2007)....
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...able mixing, better mass and oxygen transfer into the biomass and lower energy consumption for aeration and agitation (Suijdam et al. 1980; Liao et al. 2007)....
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References

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Open Access

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TL;DR: This review is focused on the factors influencing the fungal morphology and metabolite production in submerged culture and the development of any particular morphological form.

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