Biodegradation of Dairy Wastewater by the Use of Fish Scales as Packing in Moving Bed Bioreactors

A. El Jaafari; N. Boutaleb; B. Bahlaouan; A. Aitcheikh; T. Taiek; A. Jada; S. Lazar; S. El Antri

doi:10.1166/jcsb.2016.1151

Moving bed biofilm reactor (MBBR) for dairy wastewater treatment

Energy Reports ◽

10.1016/j.egyr.2020.11.158 ◽

2020 ◽

Vol 6 ◽

pp. 340-344

Author(s):

Andreia D. Santos ◽

Rui C. Martins ◽

Rosa M. Quinta-Ferreira ◽

Luis M. Castro

Keyword(s):

Wastewater Treatment ◽

Biofilm Reactor ◽

Dairy Wastewater ◽

Moving Bed Biofilm Reactor ◽

Moving Bed

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Treatment of Dairy Wastewater in a Novel Moving Bed Biofilm Reactor

Water Science & Technology ◽

10.2166/wst.1992.0451 ◽

1992 ◽

Vol 26 (3-4) ◽

pp. 703-711 ◽

Cited By ~ 33

Author(s):

B. Rusten ◽

H. Ødegaard ◽

A. Lundar

Keyword(s):

Surface Area ◽

Pilot Plant ◽

Industrial Effluents ◽

Biofilm Reactor ◽

Dairy Wastewater ◽

Test Results ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Biofilm Reactors ◽

In Series

A novel moving bed biofilm reactor has been developed, where the biofilm grows on small, free floating plastic elements with a large surface area and a density slightly less than 1.0 g/cm3. The specific biofilm surface area can be regulated as required, up to a maximum of approximately 400 m2/m3. The ability to remove organic matter from concentrated industrial effluents was tested in an aerobic pilot-plant with two moving bed biofilm reactors in series and a specific biofilm surface area of 276 m2/m3. Treating dairy wastewater, the pilot-plant showed 85% and 60% COD removal at volumetric organic loading rates of 500 g COD/m3h and 900 g COD/m3h respectively. Based on the test results, the moving bed biofilm reactors should be very suitable for treatment of food industry effluents.

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Dairy wastewater treatment in a moving bed biofilm reactor

Water Science & Technology ◽

10.2166/wst.2002.0441 ◽

2002 ◽

Vol 45 (12) ◽

pp. 321-328 ◽

Cited By ~ 25

Author(s):

G. Andreottola ◽

P. Foladori ◽

M. Ragazzi ◽

R. Villa

Keyword(s):

Wastewater Treatment ◽

Removal Efficiency ◽

Biofilm Reactor ◽

Dairy Wastewater ◽

Production Cycle ◽

Nutrient Loads ◽

Moving Bed Biofilm Reactor ◽

Moving Bed ◽

Pre Treatment ◽

High Concentrations

Dairy raw wastewater is characterised by high concentrations and fluctuations of organic matter and nutrient loads related to the discontinuity in the cheese production cycle and machinery washing. The applicability of a Moving Bed Biofilm Reactor (MBBR) filled with FLOCOR-RMP® plastic media to the treatment of dairy wastewater was evaluated in a pilot-plant. COD fractionation of influent wastewater, MBBR performance on COD and nutrient removal were investigated. A removal efficiency of total COD over 80% was obtained with an applied load up to 52.7 gCOD m−2 d−1 (corresponding to 5 kgCOD m−3d−1). The COD removal kinetics for the MBBR system was assessed. The order of the kinetics resulted very close to half-order in the case of a biofilm partially penetrated by the substrate. The nitrogen removal efficiency varied widely between 13.3 and 96.2% due to the bacterial synthesis requirement. The application of a MBBR system to dairy wastewater treatment may be appropriate when upgrading overloaded activated sludge plants or in order to minimise reactor volumes in a pre-treatment.

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Scanning Electron Microscopy of Fish Scales as an Adjunctive Aid in Speciation

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100095236 ◽

1972 ◽

Vol 30 ◽

pp. 394-395

Author(s):

Edward D. DeLamater ◽

Walter R. Courtenay ◽

Cecil Whitaker

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Lateral Line ◽

Species Differences ◽

Fish Scale ◽

Fish Scales ◽

Anterior Border ◽

The University ◽

Multiple Holes ◽

Scanning Electron

Comparative scanning electron microscopy studies of fish scales of different orders, families, genera and species within genera have demonstrated differences which warrant elaboration. These differences in detail appear to be sufficient to act as “fingerprints”, at least, for family differences. To date, the lateral line scales have been primarily studied. These demonstrate differences in the lateral line canals; the pattern of ridging with or without secondary protuberances along the edges; the pattern of spines or their absence on the anterior border of the scales; the presence or absence of single or multiple holes on the ventral and dorsal sides of the lateral line canal covers. The distances between the ridges in the pattern appear likewise to be important.A statement of fish scale structure and a comparison of family and species differences will be presented.The authors wish to thank Dr. Donald Marzalek and Mr. Wallace Charm of the Marine and Atmospheric Laboratory of the University of Miami and Dr. Sheldon Moll and Dr. Richard Turnage of AMR for their exhaustive help in these preliminary studies.

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SEM analysis of fish scale cross sections: A technique study

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100124124 ◽

1992 ◽

Vol 50 (1) ◽

pp. 744-745

Author(s):

M.E. Lee ◽

A. Moller ◽

P.S.O. Fouche ◽

I.G Gaigher

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Cross Sections ◽

Soft Tissues ◽

Close Association ◽

Sem Analysis ◽

Fish Scale ◽

Fish Scales ◽

Micro Structures ◽

Scanning Electron

Scanning electron microscopy of fish scales has facilitated the application of micro-structures to systematics. Electron microscopy studies have added more information on the structure of the scale and the associated cells, many problems still remain unsolved, because of our incomplete knowledge of the process of calcification. One of the main purposes of these studies has been to study the histology, histochemistry, and ultrastructure of both calcified and decalcified scales, and associated cells, and to obtain more information on the mechanism of calcification in the scales. The study of a calcified scale with the electron microscope is complicated by the difficulty in sectioning this material because of the close association of very hard tissue with very soft tissues. Sections often shatter and blemishes are difficult to avoid. Therefore the aim of this study is firstly to develop techniques for the preparation of cross sections of fish scales for scanning electron microscopy and secondly the application of these techniques for the determination of the structures and calcification of fish scales.

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