A WASTE-TO-PRODUCT MODULE FOR MARINE RECIRCULATION SYSTEM
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Transcript of A WASTE-TO-PRODUCT MODULE FOR MARINE RECIRCULATION SYSTEM
A WASTE-TO-PRODUCT MODULE FOR MARINE RECIRCULATION SYSTEM
Hii, Yii SiangFaculty of Agrotechnology and Food
Science, University Malaysia Terengganu
21030 Kuala Terengganu, Terengganu
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).
• Aquaculture, a potential solution to cover shortage of the seafood supply.
• Aquaculture is not a totally effective solution.
• Aquaculture is reported to have potential environmental effect (GESAMP, 1996)
“Development that meets the needs of the present without compromising the ability of future generations to meet
their own needs” ---
Brundtland commission, 1983
United Nation, 1987
Sustainable aquaculture should cover at least four major aspects:
• Environment • Economics • Food safety• Technical viability
(NACA/FAO, 2001)
• 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.
•High cost
•Immature system development
•Fluctuating market price
•Risk of Investment
Need for a technically viable technology for
sustainable aquaculture
Project Scope & Objectives
• 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.
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
Nutrients
Nutrients
Objectives
• 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
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
culture vessels(fish, shrimp, oyster,
etc)
Ornamental as well as food fish
waste and solid removal
Biological filtration
Aeration and oxygenation
Disinfection
Gas-exchange unit Proposed
module
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.
Preliminary Results
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
Project Milestones Duration
01. Stabilizing immobilized cell for industrial exercise: Cell stability and enhancement
6 month
02. Prototype and in-situ examinations: efficiency assessment, cost-effectiveness, return of investment
4 month
03. Module moderation & pre-commercialization assessment
2 month
Project Milestones
PARTNERSHIP• 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.
Financial Needs
• Financial supports is needed for pre-protoytpe optimization.
• Duration of project: 1 year
Budget details Amount requested by applicant
Research Materials & Supplies (including Animals, Disposables, etc.)
15,000
Maintenance and Minor Repair Services
10,000
Professional services & other services inclu-ding printing & hospi—tality, honorarium for subjects)
10,000
Equipments (Accessories) 25,000
TOTAL AMOUNT 50,000
Concluding Remarks
• 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.