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Development of aeration-assisted combined nitrification and solid removal unit for a compact recirculating aquaculture system
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Document Title
Development of aeration-assisted combined nitrification and solid removal unit for a compact recirculating aquaculture system
Author
Aumnongpho K., Pungrasmi W., Powtongsook S., Nootong K.
Name from Authors Collection
Affiliations
Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Research Network of NANOTEC-CU on Environment, Department of Environmental Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence in Marine Biotechnology, Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand; National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani12210, Thailand; Bio-Circular-Green-economy Technology & Engineering Center (BCGeTEC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
Type
Article
Source Title
Engineering Journal
ISSN
01258281
Year
2021
Volume
25
Issue
1
Page
41275
Open Access
All Open Access, Bronze, Green
Publisher
Chulalongkorn University, Faculty of Fine and Applied Arts
DOI
10.4186/ej.2021.25.1.1
Format
Abstract
This work focused on the development of water treatment unit, called aeration-assisted combined nitrification and solid removal (ACNS), for compact aquaculture system. Results of preliminary study indicated that aerated filtration could extend filtration time significantly and capture more solids as compared to non-aerated filtration. Operating parameters of ACNS, including screen pore size, influent flow rate, aeration rate and position of air diffuser, were determined at 130 μm, 750 L/h, 120 L/h and 1.0 cm below the base of screen, respectively. ACNS was subsequently evaluated for its performance in nitrogen and solid removal during the 60-days closed-water tilapia cultivation. Performance of aquaculture system with ACNS, as the only treatment unit, was comparable to the aquaculture system having both nitrifying biofilter and ACNS, as separated units. Specifically, ACNS could maintain suspended solids (28 ± 7.6 mg SS/L), ammonia (< 0.5 mg N/L) and nitrite (< 0.5 mg N/L) concentration below the recommended limits for extended period. ACNS also produced relatively high and constant effluent flux close to initial value despite increasing the filtration time in aerated compartment up to 7 days. This led to continuous filtration, without stopping the system to remove solids on screen, for 50 days. © 2021, Chulalongkorn University, Faculty of Fine and Applied Arts. All rights reserved.
Keyword
Aquaculture | Nitrification | RAS | Solid | Tilapia
Industrial Classification
Knowledge Taxonomy Level 1
Knowledge Taxonomy Level 2
Knowledge Taxonomy Level 3
Funding Sponsor
Chulalongkorn University; National Science and Technology Development Agency; National Nanotechnology Center; Ministry of Science and Technology of Thailand
License
CC BY-NC-ND
Rights
Author
Publication Source
Scopus