Seafood Processing Wastewater Treatment

There is very little known about the effectiveness of wastewater treatment systems for saline wastewater generated by seafood processing industries, aquaculture and tourism activities. In particular, the effect of salinity on nitrogen and phosphorus removal in wastewater treatment processes is not well understood. Therefore we devised experiments to examine the treatment of highly saline wastewater, by using artificial seafood processing wastewater, for removal of nitrogen and phosphorus. Lab scale sequencing batch reactors (SBR) were initially operated at low, and then at increasing salt levels, to determine the overall effects of salinity on the nutrient removal performance. The microbial populations during these experiments were monitored to determine the specific effect of salinity on the various bacterial groups responsible for nutrient removal. The methods used were whole cell probing with fluorescently labelled RNA-directed oligonucleotide probes. Experimental data showed that the SBRs achieved good biological nutrient removal (BNR) when salinity levels in the influent were low (0.03% to 0.2% NaCl) but showed difficulties with biological phosphorus removal at salinity levels of 0.5%. It was found that there was a dominance of Gram-positive bacteria with a high mol% G+C in their DNA in the SBR treating wastewater with NaCl at 0.03% to 0.2%. The addition of acetate to improve BNR performance increased the proportion of bacteria from the beta Proteobacterial subclass.

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Performance and microbial surveying in submerged membrane bioreactor for seafood processing wastewater treatment

Journal of Membrane Science ◽

10.1016/j.memsci.2007.11.011 ◽

2008 ◽

Vol 317 (1-2) ◽

pp. 43-49 ◽

Cited By ~ 22

Author(s):

P SRIDANG ◽

A POTTIER ◽

C WISNIEWSKI ◽

A GRASMICK

Keyword(s):

Wastewater Treatment ◽

Membrane Bioreactor ◽

Submerged Membrane Bioreactor ◽

Seafood Processing

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Extraction of Bio Polymers from Crustacean Shells and its Application in Refinery Wastewater Treatment

Walailak Journal of Science and Technology (WJST) ◽

10.48048/wjst.2021.11543 ◽

2021 ◽

Vol 18 (5) ◽

Author(s):

Khadija Salim ABDULLAH AL BALUSHI ◽

Geetha DEVI ◽

Amira Sulaiman RASHID KHAMIS AL GHARIBI ◽

Mohammed Adeeb Salim ADEEB ◽

Alaa Saif Mohammed AL HUDAIFI ◽

...

Keyword(s):

Wastewater Treatment ◽

Thermo Gravimetric Analysis ◽

Oxygen Demand ◽

Cost Effective ◽

Gravimetric Analysis ◽

Refinery Wastewater ◽

Solution Ph ◽

X Ray ◽

Refinery Effluent ◽

Seafood Processing

The fisheries sector is one of the most ancient and important sectors in the world and plays a significant role in providing the nutrition and socio-economic development of the country. The fish processing industry produces huge quantities of wastewater, encompassing significant amounts of contaminants in the form of soluble, colloidal, and particulate matters. The disposal of shellfish waste is a serious issue, and the effluents discharged from seafood-processing plants contain high amounts of Chemical Oxygen Demand (COD), Biochemical Oxygen Demand (BOD), dissolved solids, suspended solids, and turbidity. The existing waste management system lacks a cost-effective and environmentally friendly method. The current research focus on the extraction of a biopolymer chitosan from crab shells by ecofriendly methods and its application in refinery wastewater treatment. The chemical structure and crystallinity of the extracted chitosan was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD) analyses. Surface morphology and elemental composition were determined using Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray Analysis (EDX). Thermal properties were detected using Thermo Gravimetric Analysis (TGA). The extracted chitosan was successfully employed in the batch treatment of refinery effluent by varying the experimental parameters (refinery effluent solution pH, contact time, dosage of chitosan, and stirring speed) and the optimizations of the processing conditions were established.

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