Results Report of Project

Transcription

1 Results Report of Project Developing and Operating a Demonstrative Grow-out farm for Sustainable and Advanced Pangasius Aquaculture in Vietnam Can Tho University

2 Contents 1. Introduction of project 2. Results of trial in Phu Thuan farm 3. Operation of raceway in CTU 4. Evaluation and suggestion

3 1. Introduction of project 1.1 Participation Sponsor: Embassy of Denmark in Hanoi Project Leader: Ministry of Agriculture & Rural Development Project Management: Vietnam Association of Seafood Exporter & Producers (VASEP) Implementing institutions: Can Tho University (CTU) Thuan Hung Fisheries Co.Ltd (THUFICO) Vietnam Danish Aquaculture Technology Excellence Center (VIDATEC)

4 1. Introduction of project VIDATEC: include 6 companies AKVA Group DHI PERKULATOR OXY GUARD GRUNDFOS RK-Plast

5 1. Introduction of project 1.2 Objectives To increase product quality and improve water quality Specific objectives: To reduce feed conversion ratio (FCR) To organize sustainable and environmentally friendly aquaculture production To be able to conduct traceability completely

6 1. Introduction of project 1.3 Content and Activities Establishing a demonstration Pangasius aquaculture farm Producing 2 continuous crops Designing future Pangasius aquaculture pond applying advanced technology

7 1. Introduction of project Location of trial ponds: Phu Thuan farm, Thuan Hung Fisheries

8 1. Introduction of project Location of raceway, recirculation aquaculture system: College of Aquaculture and Fisheries

9 2. Results of trial in Phu Thuan farm

10 2. Results of trial in Phu Thuan farm 2.1 Experimental equipments Biofilter Pond 5 Pond 4 Pond 3 Pond 2 Pond 1 Control No aeration Aeration type 2 Aeration type 2 Reservor Aeration type 1 Density: 100 Hand feeding Density: 100 Hand feeding Density: 120 Pendulum feeder Density: 100 Blower feeder Water supply channel

11 2. Results of trial in Phu Thuan farm Pond No. 1 3 Airturbo RV2 (3 kw motor, 54 m 3 /hour) 4 blower feeder

12 2. Results of trial in Phu Thuan farm Pond No. 3 1 Air blower (1,500 m 3 /hour), 3 air diffusers (L x W x H = 6 x 1.33 x 2.5 m) 8 pendulum feeders

13 2. Results of trial in Phu Thuan farm 1 Moving Bed Biofilm Reactor (6 x 2 x 1.2 m); filled with 5 m 3 bio-media Operated 2 months before harvesting

14 2. Results of trial in Phu Thuan farm Pond No. 4 1 Air blower (1,500 m 3 /hour), 3 air diffusers. 1 Moving Bed Biofilm Reactor Hand feeding Pond No. 5: Control pond, apply company s technology

15 2. Results of trial in Phu Thuan farm Water quality monitoring equipments (OxyGuard): Prober: DO, CO 2, ph, total gas and temperature Processor, recorder and controller

16 2. Results of trial in Phu Thuan farm 2.2 Fingerling: larvae were reared in Phu Thuan farm. Size of stocked fingerling was in g

17 2. Results of trial in Phu Thuan farm 2.3 Feed and feeding rate Protein content: 22-32% Types of feed: Greenfeed, Proconco, Viet Thang Ratio of feed type and feeding rate were similar between trial ponds

18 2. Results of trial in Phu Thuan farm 2.4 Water management: Daily water exchange rate according to fish size < 200 g: 5-10% g: 10-20% > 300 g: 20-30%

19 2. Results of trial in Phu Thuan farm 2.5 Results i) Water environment: Dissolved oxygen (DO) DO level of trial ponds was improvable than that in control pond. DO level dropped below 2 mg/l from the 5 th month when fish reach the size > 250 g DO level during culture period fish size above 500g DO level during 24 hours in the 8 th month

20 2. Results of trial in Phu Thuan farm 2.5 Results i) Water environment: CO 2 Highest CO 2 level was observed in control ponds (no aeration) when fish reach to the size above 350 g CO 2 in pond No.1 and No.3 reduced during the time operating the biofilter CO CO 2 2 level in in ponds during the culture period CO 2 level in ponds when operating the biofilter

21 2. Results of trial in Phu Thuan farm 2.5 Results i) Water environment: Other parameters TAN, NO 2, NO 3, had large fluctuations and depended on water exchange rate. TSS in applied aeration ponds was higher than that in control, which consider as a factor affected to flesh quality. TAN level in ponds during the culture period TSS level in ponds during the culture period

22 2. Results of trial in Phu Thuan farm 2.5 Results ii) Fish growth: Pond SGR (%/day) SR (%) Mortality of fish during culture period - Specific growth rate (%/day) and survival of the fish in ponds applied aeration were higher than that of control pond

23 2. Results of trial in Phu Thuan farm iii) Efficiency: Pond Yield (kg) Feed intake (kg) Productivity (ton/ha/crop) FCR 1 72, , , , , , , , At the same density, but the yields in two aeration ponds increased 18.7% and 29.3% compared to control. Due to limited water sources, increase in density (120 ind./m 2 ) leaded to yield increase, but FCR was

24 iii) Efficiency: Pond 2. Results of trial in Phu Thuan farm Production cost (VND/kg) Electricity cost (VND/kg) Ratio of fish <750 g (%) 1 22,826 1, , , , Having the same fish density, power used for aeration and water exchange in pond 3 was equivalent to that of water exchange in control: reduced amount water used Increased fish density may increases size variation

25 iii) Efficiency : 2. Results of trial in Phu Thuan farm Pond Ratio of flesh color (%) Drug & chemical used compared to control (%) 1 35% white; 65% pinky-white % white; 70% pinky-white % white; 65% pinky-white % white; 76% pinky-white Applying aeration and reducing water exchange was still ensuring fillet quality (color) and reduce the cost of drugs and chemicals used

26 3. Operation of raceway in CTU

27 3. Operation of raceway in CTU 3.1 Culture system: Total area: 320 m 2, culture volume: 460 m 3 ; water deepth: 2 m; biofilter volume: 136 m 3 ; bio-media volume: 40 m 3

28 3. Operation of raceway in CTU 3.2 Grow-out protocol: Experimental fish: was purchased from Dong Thap province; average size of 33 g Feed and feeding: Proconco and Greenfeed (26-28% CP); feeding rate was according to Thufico protocol. Tank 1 Tank 2 Total number of fish 17,803 17,622 Stocking density (inds/m 3 ) Survival rate (%) on 28/04/

29 3. Operation of raceway in CTU 3.2 Grow-out protocol: Water quality management: Water quality parameters: measured by Oxyguard devices (automatic) and analyzed in the laboratory in College of Aquaculture and Fisheries, CTU No water exchange, water was only added due to evaporation and discharge waste in the bottom

30 3. Operation of raceway in CTU 3.3 Preliminary results: i) Water quality: DO was maintained above 4 mg/l in the first three months 10,0 8,0 6,0 4,0 2,0 0,0 19/1/16 26/1/16 8,0 7,0 6,0 5,0 4,0 3,0 2,0 1,0 0,0 19/1/16 26/1/16 Oxygen concentration in ended raceway (mg/l) 2/2/16 9/2/16 16/2/16 23/2/16 1/3/16 8/3/16 15/3/16 22/3/16 29/3/16 5/4/16 12/4/16 19/4/16 26/4/16 3/5/16 Oxygen concentration in middle raceway (mg/l) 2/2/16 9/2/16 16/2/16 23/2/16 1/3/16 8/3/16 15/3/16 22/3/16 29/3/16 5/4/16 12/4/16 19/4/16 26/4/16 3/5/16

31 3. Operation of raceway in CTU Water quality CO 2 : < 20 mg/l ph: >7 20,0 15,0 10,0 5,0 0,0 19/1/16 26/1/16 9,00 8,00 7,00 6,00 5,00 4,00 3,00 2,00 1,00 0,00 19/1/16 26/1/16 CO2 in the raceway (middle) (mg/l) 2/2/16 9/2/16 16/2/16 23/2/16 1/3/16 ph in the raceway (middle) 8/3/16 15/3/16 22/3/16 29/3/16 5/4/16 12/4/16 19/4/16 26/4/16 3/5/16 2/2/16 9/2/16 16/2/16 23/2/16 1/3/16 8/3/16 15/3/16 22/3/16 29/3/16 5/4/16 12/4/16 19/4/16 26/4/16 3/5/16

32 3. Operation of raceway in CTU i) Water quality: TSS: high fluctuation, but still in suitable range /01/16 TSS of 1st position in system per two weeks (mg/l) 22/01/16 25/01/16 04/02/16 15/02/16 29/02/16 15/03/16 01/04/16 15/04/16 28/04/16 TSS of 1st position in system per two weeks (mg/l) /01/16 22/01/16 25/01/16 04/02/16 15/02/16 29/02/16 15/03/16 01/04/16 15/04/16 28/04/16

33 3. Operation of raceway in CTU i) Water quality: TAN: was maintained in suitable range (<2 mg/l) NO 2 : large fluctuation due to reducing of ph. NO 2 was overcome when ph> 7 2,5 2 1,5 1 0, ,5 1 0,5 0 20/01/16 TAN of 1st position in system per two weeks (mg/l) 22/01/16 25/01/16 04/02/16 15/02/16 29/02/16 15/03/16 01/04/16 15/04/16 NO2 of 1st position in system per two weeks (mg/l) 28/04/16 20/01/16 22/01/16 25/01/16 04/02/16 15/02/16 29/02/16 15/03/16 01/04/16 15/04/16 28/04/16

34 ii) Growth rate: 3. Operation of raceway in CTU Growth rate after the period three months cultured gam/day %/day Tank Tank Fish in raceway growth faster than fish grown in aeration ponds in Phu Thuan farm (Ex: pond No.4: 2,03%/ngày)

35 3. Operation of raceway in CTU ii) Efficiency: The amount of water used (until 15/05/2016) was 5, m 3 need L of water to produce 1 kg of fish (that was 4,700 L/kg in normal production pond) Medicine and drugs: minerals and vitamins were added into the feed to increase the fish s resistance but antibiotics were not.

36 4. Evaluation and suggestion - Equipments: Increase DO level: results in better growth, survival rate, productivity, and improve FCR than those of traditional pond. However: Due to deep pond (4 m), can not put out all waste, it caused in decreasing of DO (<2 mg/l from 5 th month) in last months of crop when fish was bigger than 250 g Increased turbidity in the pond Need to improve equipment and cultured pond (reduce water depth, find solutions for waste removal)

37 4. Evaluation and suggestion Feeder: Very good in control feed delivery (quantity, time, feeding frequency) Small volume, slow feed distribution that was not suitable for large fish stage Suggestion: Applied for larval rearing to fingerling stage

38 4. Evaluation and suggestion Biofilter tank: Good performance in degassing, and reducing NO 2 Small volume: functioning of water improvement in large ponds is not clear. High energy consumption Reduce pond water volume (reduced water depth) to make the current distributed water around the pond

39 4. Evaluation and suggestion Water monitoring equipments: Perfect system for measuring and recording variation of water parameters Store large amounts of data. However, manipulation of accessing, adjusting, and connecting between water quality probes and controller make it difficult for farmers to run the system. High investment costs Organize training courses; establish policy of recommendations, and support the use of equipments

40 Thank you for your attention