Biological water treatment in recirculating aquaculture system by using Caulerpa lentillifera J Agardh

การบำบัดน้ำทางชีวภาพในระบบน้ำหมุนเวียนโดยใช้สาหร่ายพวงองุ่น (Caulerpa lentillifera J Agardh)

Name: Phenkae Kunawongdet

Name: เพ็ญแข คุณาวงค์เดช

LCSH: Sewage -- Purification$xBiological treatment

LCSH: Sewage -- Purification

LCSH: Caulerpa lentillifera

Abstract: Biological water treatment using Caulerpa lentillifera was investigated in a Recirculating Aquaculture System (RAS) with 4 culture densities (0, 2, 4 and 6 g/L/system). Each RAS unit consisted of a fish tank stocked with 12 Amphiprion clarkii and a purification basin contained seaweed. Each RAS unit was filled with 30 L of seawater at 32 ppt, running at a circulation rate of 800 L/hr, and the seaweed culture was lighted at 13,094.4±5,805.9 Lux for 12 hr/day. The control without seaweed was not lit. The experiment ran for 49 days and the following parameters were recorded: (1) C. lentillifera specific growth rate (SGR), (2) A. clarkii SGR, food conversion ratio (FCR) and survival rate, and (3) water quality of each RAS unit. Results indicated that seaweed SGR at 2 g/L was significantly greater than those of others densities. Seaweed SGR for all treatments decreased after 35 days. Fishes reared in RAS units with seaweed resulted lower FCR and higher survival rate than those without seaweed. The fish SGR among RAS treatments were insignificantly different. Water qualities in all seaweed treatments during lighted periods including DO, pH and alkalinity were higher while CO2 (aq) was lower than those without seaweed. However, during dark period DO of the former treatments were lower while CO2 (aq) were higher than those of the latter treatments. The concentrations of N-compounds in water with seaweed treatments were lower than those without seaweed. The treatment with 2 g/L seaweed showed highest N-compounds reduction rate. The concentrations of soluble phosphate were insignificantly different among all treatments and control.

Burapha University. Library

Address: CHONBURI

Email: buulibrary@buu.ac.th

Created: 2563

Modified: 2020-11-02

Issued: 2020-11-02

บทความ/Article

application/pdf

ISBN: 2351-0781

BibliograpyCitation : วารสารวิทยาศาสตร์บูรพา. ปีที่ 25, ฉบับที่ 2 (พ.ค.-ส.ค. 2563), หน้า 509-523

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