Nitrogen recovery in a decoupled aquaponic system with lamellar settler and trickling biofilter: implications for system management

Gebauer, Radek; Lehman, Liliana; Monsees, Hendrik; Rennert, B.; Mráz, Jan; Kloas, Werner

doi:10.1007/s10499-022-00888-6

Cited by 2 publications

(4 citation statements)

References 45 publications

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“…As a result, fish cultured in the aquaponics system grew optimally. This can be seen from the fact that the crude protein retention of fish obtained in the present study was higher compared to some previous studies using Nile tilapia, including 21.0% and 27.9% (Wongkiew et al, 2018) or 21.1% (Gebauer et al, 2022), Table 5. Table 5 shows the calculated nutrient retention obtained in the present study compared to the previous study.…”

contrasting

confidence: 61%

“…However, few studies reported still that the wastes degrading process in an aquaponics system is very slow, resulting in a low nitrogen recovery (Gebauer et al, 2022;Paudel, 2020). One way to deal with this issue is by improving the work or nitrifying bacteria in the system.…”

Section: Discussionmentioning

confidence: 99%

“…The work is dominantly performed by ammonia‐oxidizing bacteria (AOB) and nitrite‐oxidizing bacteria (NOB), generally known as nitrifying bacteria (Paudel, 2020). However, few studies reported still that the wastes degrading process in an aquaponics system is very slow, resulting in a low nitrogen recovery (Gebauer et al, 2022; Paudel, 2020). One way to deal with this issue is by improving the work or nitrifying bacteria in the system.…”

Section: Discussionmentioning

confidence: 99%

“…Total protein retention 98%: 91% (Wahyuningsih et al, 2015) 33% in fish 21.1% (Gebauer et al, 2022). 23.33% (Adhikari et al, 2020 29.3% (Paudel, 2020).…”

Section: Present Study Previous Studiesmentioning

confidence: 99%

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Isolation and screening of indigenous nitrifying bacteria to enhance nutrient recovery in an aquaponics system

Amin

Agustono

Ali

et al. 2023

J World Aquaculture Soc

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The recycling processes of aquaponic waste into fertilizers are highly dependent on the type and activity of nitrifying bacteria in the system. This study aims to find indigenous nitrifiers to enhance nutrient recovery in an aquaponics system. Twelve indigenous nitrifiers consisting of ammonia and nitrite‐degrading bacteria were isolated from a local earthen pond of Nile tilapia (Oreochromis niloticus), and two isolates (AQ4 and AQ12) were selected due to their highest capacity to degrade either ammonia or nitrate respectively. Based on the 16S rRNA gene sequences, these isolates were identified as Marinobacter nauticus (AQ4) with 98.64% similarity, and Bacillus sp. (AQ12) with 99.89% similarity. When these bacterial isolates were applied in aquaponics systems with bacterial enhancement (aquaponicsBE), the nutrient recovery was significantly higher compared to the control (aquaponicsctrl), indicated by a 500 g higher total harvested biomass. With a significance value of p < 0.05, aquaponicsBE gives 17% higher crude fat and protein retention in vegetables while in fish 14% higher crude fat was found. Energy retention in vegetables was 23% higher than in the control. Furthermore, fish grew better in the aquaponicsBE system, with 0.6%BW/day higher specific growth rate, and 0.05 better feed conversion ratio compared to that of fish reared in the control.

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contrasting

confidence: 61%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…Total protein retention 98%: 91% (Wahyuningsih et al, 2015) 33% in fish 21.1% (Gebauer et al, 2022). 23.33% (Adhikari et al, 2020 29.3% (Paudel, 2020).…”

Section: Present Study Previous Studiesmentioning

confidence: 99%

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