Impact of carrier on ammonia and organics removal from zero-discharge marine recirculating aquaculture system with seque
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WATER ENVIRONMENTAL POLLUTION AND STATE OF THE ART TREATMENT TECHNOLOGIES
Impact of carrier on ammonia and organics removal from zero-discharge marine recirculating aquaculture system with sequencing batch biofilm reactor (SBBR) Jin Li 1 & Weiqiang Zhu 1,2 & Huiyu Dong 3 & Zhenlin Yang 1 & Peiyu Zhang 1 & Zhimin Qiang 3 Received: 2 December 2018 / Accepted: 15 March 2019 # Springer-Verlag GmbH Germany, part of Springer Nature 2019
Abstract Marine recirculating aquaculture system (MRAS) is an effective technology that provides sustainable farming of food fish globally. However, dissolved organics material (chemical oxygen demand, COD) and especially ammonia are produced from uneaten feed and metabolic wastes of fish. To purify the MRAS water, this study adopted a sequencing biofilm batch reactor (SBBR) and comparatively investigated the performances of four different carriers on ammonia and COD removal. Results indicated that the NH4+-N removal rates were 0.045 ± 0.05, 0.065 ± 0.008, 0.089 ± 0.005, and 0.093 ± 0.003 kg/(m3·d), and the COD removal rates were 0.019 ± 0.010, 0.213 ± 0.010, 0.255 ± 0.015, and 0.322 ± 0.010 kg/(m3·d) in the SBBRs packed with porous plastic, bamboo ring, maifan stone, and ceramsite carriers, respectively. Among the four carriers, ceramsite exhibited the best performance for both NH4+-N (80%) and COD (33%) removal after the SBBR reached the steady-state operation conditions. For all carriers studied, the NH4+-N removal kinetics could be well simulated by the first-order model, and the NH4+-N and COD removal rates were logarithmically correlated with the carrier’s specific surface area. Due to its high ammonia removal, stable performance and easy operation, the ceramsite-packed SBBR is feasible for MRAS water treatment. Keywords Sequencing biofilm batch reactor (SBBR) . Carrier . Marine recirculating aquaculture system (MRAS) . Water treatment, ammonia
Introduction
Responsible editor: Philippe Garrigues Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-019-04887-8) contains supplementary material, which is available to authorized users. * Zhimin Qiang [email protected] 1
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China
2
Department of Bioscience Engineering, Research Group of Sustainable Energy, Air and Water Technology, University of Antwerp, 2020 Antwerp, Belgium
3
Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-environmental Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100085, China
Driven by a combination of population growth, rising income, and urbanization, global fish production is growing and aquaculture is among the fastest growing food-producing sectors, which accounts for almost half of the total food fish supply (FAO 2014; Pulvenis 2009). Excessive fishing due to increased consumption, water pollution, and destruction of natural habitats has caused depletion of fish stocks in natural aquatic environm
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