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A WASTE-TO-PRODUCT MODULE FOR MARINE RECIRCULATION SYSTEM. Hii, Yii Siang Faculty of Agrotechnology and Food Science, University Malaysia Terengganu 21030 Kuala Terengganu, Terengganu. Background. World population: 10 billion (6.6 billion July, 2007)

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A waste to product module for marine recirculation system l.jpg

A WASTE-TO-PRODUCT MODULE FOR MARINE RECIRCULATION SYSTEM

Hii, Yii Siang

Faculty of Agrotechnology and Food Science, University Malaysia Terengganu

21030 Kuala Terengganu, Terengganu


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Background

  • World population: 10 billion (6.6 billion July, 2007)

  • Demand for seafood protein increases significantly.

  • Capture fisheries at its current stage is believed to be imminent maximum sustainable yield (FAO, 2005).



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“Development that seafood supply. meets the needs of the present without compromising the ability of future generations to meet their own needs” ---

Brundtland commission, 1983

United Nation, 1987


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Sustainable aquaculture should cover at least four major aspects:

  • Environment

  • Economics

  • Food safety

  • Technical viability

    (NACA/FAO, 2001)



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  • High cost not in a "sustainable" manner.

  • Immature system development

  • Fluctuating market price

  • Risk of Investment

Need for a technically viable technology for sustainable aquaculture

  • Aquaculture nowadays focuses on production methods those independent from the influences of external factors

  • Marine recirculation aquaculture system (RAS) is environmental friendly, free from the external influences and bio-secured.


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Project Scope & Objectives not in a "sustainable" manner.

  • The principle of the module is to utilize excessive nutrients for cultivation of high value marine microalgae

  • The microalgae are confined in immobilized beads which comprises of immobilized microbes.


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Nutrients not in a "sustainable" manner.

Nutrients

The immobilized microbe utilized excessive nutrients from the marine recirculation system and converted the waste into biomass. The immobilized cells could be harvested and processed to become nutrient supplementary


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Objectives not in a "sustainable" manner.

  • The objectives of the module are:

    • To remove excessive nutrients from the marine RAS and hence stabilized water quality of the system

    • To recycle waste from the RAS for production of high value microalgae.

    • To produce high quality microbes within the immobilized cells


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Biological filtration not in a "sustainable" manner.

Aeration and oxygenation

Ornamental as well as food fish

Gas-exchange unit

Proposed module

culture vessels

(fish, shrimp, oyster, etc)

waste and solid removal

Disinfection

System Design & Activities

  • This module is an add-on module

  • It does not require re-engineering of the RAS.

  • The immobilized beads will be installed at the pre-biofiltration

The viable cells will be captured inside polymerized capsules and packed in a handling cartridge. The handling cartridge with water driven force for re-suspension of the polymerized capsules maximized total reaction area of the capsules.


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Preliminary Results not in a "sustainable" manner.

The microbe is able to grow and survive in the polymerized capsules. The microbes utilized excessive nutrients from the water under simulation.

Results revealed that the immobilized cell is able to stabilize water quality and production high omega-3 cell.

Polymerized capsules with viable cell at day-0.

Polymerized capsules with viable cell at day-3


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Project Milestones not in a "sustainable" manner.


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PARTNERSHIP not in a "sustainable" manner.

  • Underwater World Langkawi is one of the largest marine and fresh water aquaria in South East Asia. The gigantic 15-meter long walk-through tunnel consisting of 500,000 liter seawater is ideal for in-situ assessment of the module for marine ornamental aquaria.

  • Kembang Subur Sdn. Bhd. is one of the largest shrimp PL (post larvae) suppliers in Malaysia. The 3 hectares hatchery situated at Pantai Berserah, Kuantan provides an ideal testing venue for the add-on module in a food-fish production system.


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Financial Needs not in a "sustainable" manner.

  • Financial supports is needed for pre-protoytpe optimization.

  • Duration of project: 1 year


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Concluding Remarks not in a "sustainable" manner.

  • Marine recirculation system is one of the potential solutions for sustainable aquaculture.

  • The add-on module provides not only extra incomes but also diversify the risk of investment in the RAS.

  • Removal of the excessive nutrients from the marine RAS enable longer water residential time in the system. In other words, less water usage for the system (sustainable usage of water resources).

  • On top of that, the module also reduces nutrients load from the culture system on the environment.


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THANK YOU not in a "sustainable" manner.

“ The Earth Charter is important as an expression of the commitment of people throughout the Earth to ensure a sustainable future for those who inhabit the Earth now and those who will follow us on the Earth ... ”

Maurice F. Strong


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