Recycling waste oyster shells for eutrophication control

Kwon, Hyok-Bo; Lee, Chan-Won; Jun, B.S.; Yun, Jondo; Weon, Seung-Yeon; Koopman, Ben

doi:10.1016/j.resconrec.2003.08.005

Cited by 176 publications

(119 citation statements)

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“…by heat treatment, which exhibits antibacterial activity [3]. Oikawa et al [26] reported that the antibacterial activity was due to the strong alkalinity of aqueous solutions of this calcined calcium preparation.…”

Section: Antibacterial Testmentioning

confidence: 90%

“…The rough and convoluted surface indicates good decomposition during calcination [3]. A distribution curve was obtained from the PSA data ( Figure 3).…”

Section: Characterization Of Particlementioning

confidence: 99%

“…Oyster is considered as the most common shellfish that contributes 71% of total shellfish produced in Korea [2]. However, intensive shellfish production generates a large amount of waste that accounts for hundreds of thousands of tons a year [3].…”

Section: Introductionmentioning

confidence: 99%

“…Some authors reported the use of oyster shell waste as a substituent for aggregates in construction materials [4][5][6] or cement clinker [7]. Kwon et al [3] applied oyster shell materials to solve problems of water eutrophication by removing phosphate from waste water.…”

Section: Introductionmentioning

confidence: 99%

“…The main component of oyster shell is calcium carbonate (CaCO3) that is converted to calcium oxide (CaO) by heat treatment, which exhibits antibacterial activity [3]. In fact, there are several reports that shell powder heated to over 700 ℃ exhibited bactericidal activity [8,9].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Evaluation of Antimicrobial Activity of Allyl Isothiocyanate (AITC) Adsorbed in Oyster Shell on Food-borne Bacteria

Han¹,

Ahmed²,

Chun

2015

Clean Technology

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주제어 : 소성, 굴, Allyl isothiocyanate (AITC), 항균 Abstract : Oyster shells are a waste product from mariculture that creates a major disposal problem in coastal regions of southeast Korea. To make practical use of unused oyster shells, calcined oyster shell (COS) collected from a local company was allowed to adsorb AITC (allyl isothiocyanate), and then tested the powder's ability to inhibit the growth of some potential food borne disease-causing bacteria. COS powder showed bacteriostatic effect that inhibited cell growth of Escherichia coli, Staphylococcus aureus and Salmonella typhimurium from 3 to 5 log10 CFU/mL at concentrations around 1%. The MIC of pure AITC was found as 1 mg/mL, 0.8 mg/mL and 0.7 mg/mL for Escherichia coli, Staphylococcus aureus and Salmonella typhimurium, respectively. The calcined powder adsorbed about 225 mg of AITC per gram of shell, indicating porous material was created by calcination. FTIR data confirmed the adsorption of AITC by COS. Characterization of particle data showed very fine particle size and highly convoluted surface. AITC adsorbed calcined oyster shell (ACOS) completely inhibited bacterial cell at 1% concentration. ACOS showed better antibacterial effect than COS, indicating synergistic effect of AITC and calcined oyster shell powder on bacteria.

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Section: Antibacterial Testmentioning

confidence: 90%

“…The rough and convoluted surface indicates good decomposition during calcination [3]. A distribution curve was obtained from the PSA data ( Figure 3).…”

Section: Characterization Of Particlementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of Antimicrobial Activity of Allyl Isothiocyanate (AITC) Adsorbed in Oyster Shell on Food-borne Bacteria

Han¹,

Ahmed²,

Chun

2015

Clean Technology

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Pyrolysed powdered mussel shells for eutrophication control: effect of particle size and powder concentration on the mechanism and extent of phosphate removal

Abeynaike

Wang

Jones

et al. 2011

Asia-Pacific J Chem Eng

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The international shellfish farming industry has a growing problem with respect to sustainability: the shells, a by-product, are currently being mostly wasted to landfill. Instead, this calcium-rich resource can be used to produce lime [calcium oxide (CaO)] and then used to remove phosphate from rural wastewaters. Powdered mussel shell was heat treated to form lime. Two different shell particle sizes (fine, 53-106 µm; coarse, 212-250 µm) as well as various pyrolysis times, heating rates, pyrolysis temperatures and shell concentrations were used to determine the effects of these parameters on the lime formation and subsequent phosphate removal from a synthetic wastewater. Furthermore, the mechanisms of phosphate removal were determined by quantifying the phosphate content in all components before and after reaction with the synthetic wastewater. It was found that with excess of partially calcined pyrolysed shells, at a concentration of 5 g l −1 , more than 95% phosphate removal was achieved, irrespective of particle size or pyrolysis conditions. When using optimally heat-treated shells (particle size: 53-106 µm, pyrolysed for 1 h at 750 • C), it was possible to achieve over 90% phosphate removal using just 196 mg l −1 of shell. For the pyrolysed shells, the main mechanisms of phosphate removal were homogeneous nucleation to form a suspended precipitate, as well as adsorption and heterogeneous precipitation on the surface of the remaining calcite shell particles. 

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A preliminary study of processing seafood shells for eutrophication control

Currie

Harrison

Wang

et al. 2007

Asia-Pacific J Chem Eng

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Shells from the seafood processing industry in New Zealand are currently an under-utilized waste resource. In this study we investigate the processing conditions required for the creation of calcium oxide (lime) from green-lipped mussel (Perna canaliculus) and pacific oyster (Crassostrea gigas) shells. Lime is commonly used in wastewater treatment for the removal of phosphorous compounds from water, thus providing a means of eutrophication control. Mussel and oyster shells were processed in a horizontal tube furnace at various temperatures (650-800 • C) in both air and nitrogen environments. From X-ray diffraction (XRD) and weight-loss measurements, the extent of limestone calcination was found to increase with increasing furnace temperature for both shell species and furnace atmospheres. Analysis showed that the lime was present as a layer on the surface of the shell particles. From scanning electron microscope (SEM) images, significant changes in the surface morphology of the raw shells were observed as a result of heat treatment in both air and nitrogen atmospheres. Preliminary testing of shells heat-treated in both air and nitrogen atmospheres indicated that both types of shell removed about 90% of phosphates in water within 30 min, whereas up to 40% of phosphates were removed with untreated shells. Our results for heat-treated oyster shell differ slightly with studies in the literature, which report an absence of compositional and structural changes in an air atmosphere. 

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Recycling waste oyster shells for eutrophication control

Cited by 176 publications

References 1 publication

Evaluation of Antimicrobial Activity of Allyl Isothiocyanate (AITC) Adsorbed in Oyster Shell on Food-borne Bacteria

Evaluation of Antimicrobial Activity of Allyl Isothiocyanate (AITC) Adsorbed in Oyster Shell on Food-borne Bacteria

Pyrolysed powdered mussel shells for eutrophication control: effect of particle size and powder concentration on the mechanism and extent of phosphate removal

A preliminary study of processing seafood shells for eutrophication control

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