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Chicken Eggshell as an Innovative Bioflocculant in Harvesting Biofloc for Aquaculture Wastewater Treatment

Journal of Renewable Materials 2023年第5期11卷 2321-2332页

作者： Hajjar Hartini Wan Jusoh Nor Azman Kasan hidayah manan Nurfarahana Mohd Nasir Fareza Hanis Mohd Yunos Sofiah Hamzah Ahmad Jusoh Faculty of Ocean Engineering Technology and Informatics Universiti Malaysia TerengganuKuala NerusTerengganu21030Malaysia Institute of Tropical Aquaculture and Fisheries(AKUATROP) Universiti Malaysia TerengganuKuala NerusTerengganu21030Malaysia Faculty of Engineering Universiti Putra MalaysiaUPM SerdangSelangor Darul Ehsan43400Malaysia

Implementation of biofloc technology(BFT)system in aquaculture industry shows high productivity,low feed conversion ratio,and an optimum culture *** study was divided into two *** first phase involved maintaining the water quality using the optimum carbon-to-nitrogen ratio by manipulating pH in culture *** second phase examined the performance of harvesting biofloc(remaining phytoplankton and suspended solids in the system)using chicken eggshell powder(CESP).This study showed that pH 7 to 8 were the best biofloc performance with high removal percentage of ammonia(>99%)with a remaining ammonia concentration of 0.016 mg L^(−1)and 0.018 mg L^(−1),*** second phase of this study was performed to determine the optimal formulation and conditions of using CESP as a bio-flocculant in harvesting excess *** use of eggshell showed a higher harvesting efficiency of more than 80%under the following treatment conditions:0.25 g L^(−1)of eggshell dosage;with rapid and slow mixing rates of 150 and 30 rpm,respectively;30 min of settling time;settling velocity of 0.39 mm s^(−1)and pH of 6 to ***,the results indicated that biofloc would be the best green technology approach for sustainable aquaculture wastewater and the CESP is an organic matrix that environmental-friendly bio-coagulant for biofloc harvesting.

关键词： Chicken eggshell aquaculture biofloc coagulant water quality harvesting

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A review of gynogenesis manipulation in aquatic animals

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Aquaculture and Fisheries 2022年第1期7卷 1-6页

作者： hidayah manan A.B.Noor Hidayati Nur Aina Lyana Adnan Amin-Safwan Hongyu Ma Nor Azman Kasan Mhd Ikhwanuddin Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and FisheriesUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Institute of Biological Science Faculty of ScienceUniversity of MalayaKuala Lumpur50603Malaysia Guangdong Provincial Key Laboratory of Marine Biotechnology Shantou UniversityShantou515063China STU-UMT Joint Shellfish Research Laboratory Shantou UniversityShantou515063China

Gynogenesis is an established technique to generate all female type offspring and this technique has been successfully induced diploid gynogens progeny in aquatic animals of fishes and *** culture of all female shrimp and fishes were selected attribute to all female type offspring which have better size than male and help increase the market size and *** article discusses on the protocol applied to produce gynogens progeny and the successful rate of gynogenesis production in fishes,molluscs and aquatic crustaceans of shrimps in *** most of the UV length applied for irradiated the sperm were around 254-365 nm for(20-40 s),(20-80 s)and(5-8 s)for shrimps,254 nm,30 s for molluscs species and for fishes were around 254 nm for(1.5min)and(2-12 min)time of exposure *** gynogenesis induction,the fertilized eggs were treated with cold shock,heat shock or cytochalasin-B for both shrimp and fishes gynogens *** rate was identified around 4.33%-19.67%in *** hatching rate was identified around 3.0%,14.9%-37.2%of gynogens offspring in shrimp and various percentages of hatching rates were identified from each species of fish ***,there is still low survival rate of gynogens produced using gynogenesis technique and further study should be carried out to improve the gynogens *** discussed protocols serve as a guide lines for the gynogenesis technique application of all female monosex culture in the future.

关键词： UV-Length Irradiated sperm Fertilized eggs Hatching rate Survival rate Gynogens

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Synergistic effects of Recirculating Aquaculture System(RAS)with combination of clear water,probiotic and biofloc technology:A review

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Aquaculture and Fisheries 2024年第6期9卷 883-892页

作者： Muhammad Taufik Tuan Ismarani Tuan Ismail hidayah manan Mhd Ikhwanuddin Amir Ihsan Abdul Salam Ahmad Ideris Abdul Rahim Ahmad Najmi Ishak Amyra Suryatie Kamaruzzan Ahmad Shuhaimi Draman Nor Azman Kasan Higher Institution Centre of Excellent(HICoE) Institute of Tropical Aquaculture and FisheriesUniversiti Malaysia TerengganuKuala NerusTerengganu21030Malaysia STU-UMT Joint Shellfish Research Laboratory Shantou UniversityShantou515063China Aqua Ihsan Sdn.Bhd.FKA Hannan Diversified Sdn.Bhd.A-3-2 Megan PhoenixCherasKuala Lumpur56000Malaysia

Recirculating Aquaculture System(RAS)is introduced in aquaculture farming industry to reduce water resource utilization,efficient the energy and land uses,and also help minimalize the water *** system enables utilization of unsuitable land and promotes a sustainable environment in aquaculture ***,this technology has been established and proved efficient in monitoring the aquatic animal condition subsequently helps in maintaining the water quality and help remove solid particle wastes from the aquaculture *** today,RAS has been developed with more effective technologies such as the use of UV irradiation,solid capture,protein skimmer and also provided with highly techno bio-filtration ***,this system was applied for broodstock maturation,nursery phase,and grow-out *** this review article,we provide an overview of RAS between the clear water,probiotic,and biofloc technology,and the advantages of its *** though RAS and biofloc is two different parallel system,the application of the probiotic and biofloc in the semi-RAS application system is intense to be *** synergistic effect of RAS using this combination towards high yield aquaculture production will be highlighted in this review *** this review paper will generate awareness and useful information on the RAS application in the aquaculture system operation with help in maximize the impact to the aquaculture yield production.

关键词： Biofloc Aquaculture Green-technology Probiotic Biofloc technology Feed cost

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