The recycling of oyster shells: An environmental analysis using Life Cycle Assessment

Alvarenga, Rodrigo Freitas de; Galindro, Bruno Menezes; Helpa, Camile de Fátima; Soares, Sebastião Roberto

doi:10.1016/j.jenvman.2012.04.017

Cited by 92 publications

(74 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A key consideration in shell valorisation is the proximity of shell waste production to suitable processing facilities, as well as proximity to regions in which potential shell applications have a market. A recently conducted a life cycle assessment (LCA) on oyster shell waste (Crassostrea gigas) in Brazil, incorporating distance between shell source and the processing facility, found that a distance >323 km between the two yielded no environmental benefit of shell valorisation over landfill disposal (de Alvarenga et al 2012), highlighting that consideration must be given to the potential distances between source and application. Aside from environmental benefits, economic benefits of shell valorisation are also very dependent on distance.…”

Section: Shell Valorisationmentioning

confidence: 99%

Shells from aquaculture: a valuable biomaterial, not a nuisance waste product

Morris

Backeljau

Chapelle³

2018

Reviews in Aquaculture

144

108

View full text Add to dashboard Cite

Mollusc aquaculture is advocated as a highly sustainable food source and may play an important role in future food security globally. With production increasing worldwide, it is timely to appraise all aspects of aquaculture when considering its expanding role as a food source. In this regard, one regularly overlooked aspect of mollusc aquaculture is waste generation: namely the production of calcareous shells. Shells from the aquaculture industry are widely regarded as a nuisance waste product, yet at the same time, calcium carbonate is mined in the form of limestone and viewed as a valuable commodity. In a time of increased awareness of the need for a circular economy, the aquaculture and seafood industry should consider shells as a valuable biomaterial that can be reused for both environmental and economic benefit. This review discusses the current waste shell issue and identifies large‐scale shell applications that are already in place. Further, it highlights proposed applications that have the potential to be scaled up to address the problem of waste shell accumulations and reduce our reliance on environmentally damaging incineration and landfill disposal. Of the plethora of shell valorisation techniques proposed in the scientific literature, this review will focus only on those that can incorporate large‐scale shell utilisation, and do not require high‐energy processing, and are thus; simple, sustainable and potentially economically viable. Further, this review questions whether, in many cases, shells can provide more inherent value being returned to the marine environment rather than being used in land‐based applications.

show abstract

Section: Shell Valorisationmentioning

confidence: 99%

Shells from aquaculture: a valuable biomaterial, not a nuisance waste product

Morris

Backeljau

Chapelle³

2018

Reviews in Aquaculture

144

108

View full text Add to dashboard Cite

show abstract

“…de Alvarenga et al [6] conducted a cradle-to-grave life cycle assessment (LCA) of oysters produced in southern Brazil, incorporating the recycling of oyster shells into the LCA. Two scenarios-disposal in landfills and use as raw material-were considered.…”

Section: And Aminesmentioning

confidence: 99%

“…In Fig. 4a, the prisms are ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 6 reclined at about 30~45° in the outermost part of lamella. At a thickness of 50 µm, the angle increases progressively until prisms grow almost perpendicular to the inner surface.…”

Section: Microstructurementioning

confidence: 99%

See 1 more Smart Citation

Bivalve Shell: Not an Abundant Useless Waste but a Functional and Versatile Biomaterial

Yao

Xia

et al. 2014

Critical Reviews in Environmental Science and Technology

148

View full text Add to dashboard Cite

Running title: Bivalve shell-a functional and versatile biomaterialBivalve shells, available in abundance, have no eminent use and are commonly regarded as waste.Their improper disposal causes a significant level of environmental concern and also results in a waste of natural resources. Bivalve shell is formed by biomineralization and consists mainly of CaCO 3 with a small amount of organic matrix, giving it a potential for use as raw material.Recycling shell waste could potentially eliminate the disposal problem, and also turn an otherwise useless waste into high value-added products. The present review first describes the microstructure and physicochemical properties of bivalve shell, then focuses on its current Downloaded by [Florida International University] at 15:37 30 August 2014 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2 applications. Finally, the current status of bivalve shell studies and directions for future research are considered.

show abstract

“…The major component of clamshell waste is calcium carbonate (CaCO 3 ) which decomposes into calcium oxide (CaO) when calcined. These ingredients can be used as water treatment, and building materials, and as a catalyst for transesterification [3,4,5,6,7,8]. …”

Section: Introductionmentioning

confidence: 99%

Bacteriostatic Effect of a Calcined Waste Clamshell-Activated Plastic Film for Food Packaging

et al. 2018

View full text Add to dashboard Cite

The addition of calcined waste clamshells (CCS) into polyethylene (PE) plastic bags imparts antibacterial properties due to the presence of CaO. In this study, different proportions of calcined waste clamshells were added to PE to explore its bacteriostatic effects. The PE plastic bags with 9% and 11% of CCS exhibited antibacterial efficacy. Further, total aerobic viable count (TVC) values for raw fish fillet packaging in 9% and 11% CCS-PE plastic bags for five days were similar to the 0% CCS-PE plastic bag group after three days of incubation. In addition, the CCS-PE plastic bag demonstrated stability against solvents when examined using the metal migration test under heptane, ethanol, and acetic acid treatments. The results revealed that the CCS-PE bag retains its CaO bacteriostatic efficacy and that the addition of CCS powder to PE prolongs the shelf life of raw fish fillets, as well as mitigating safety concerns from metal leakage.

show abstract

The recycling of oyster shells: An environmental analysis using Life Cycle Assessment

Cited by 92 publications

References 25 publications

Shells from aquaculture: a valuable biomaterial, not a nuisance waste product

Shells from aquaculture: a valuable biomaterial, not a nuisance waste product

Bivalve Shell: Not an Abundant Useless Waste but a Functional and Versatile Biomaterial

Bacteriostatic Effect of a Calcined Waste Clamshell-Activated Plastic Film for Food Packaging

Contact Info

Product

Resources

About