4.7 Article

Effect of hydraulic retention time on solid-phase denitrification reactor in recirculating aquaculture system

Journal

AQUACULTURE
Volume 543, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.aquaculture.2021.736928

Keywords

Solid-phase denitrification; HRT; RAS; Microbial community; Litopenaeus vannamei

Funding

  1. National Key Research and Development Program of China [2019YFD0900403, 2018YFD0900702]
  2. National Natural Science Foundation of China [31873039]
  3. China Agriculture Research System [CARS-48]
  4. Aoshan Innovation Project of Qingdao National Laboratory for Marine Science and Technology [2015ASKJ02]
  5. Central Public-interest Scientific Institution Basal Research Fund, CAFS [2021XT0604, 2020TD46]
  6. Blue Industrial Leader Talent Support Project of Shandong Province

Ask authors/readers for more resources

The study revealed that hydraulic retention time (HRT) significantly influences the performance of solid-phase denitrification reactors, affecting denitrification efficiency and bacterial community structure. Under optimal HRT conditions, solid-phase denitrification reactors can achieve the best denitrification effect and promote the growth of total bacteria.
Hydraulic retention time (HRT) is one of the most critical operational parameters for solid-phase denitrification. The effect of HRT on solid-phase denitrification reactors (DR) packed with corrugated paperboard was investigated in recirculating aquaculture systems (RAS). Denitrification efficiencies of DR were 81.21-85.05% at HRTs of 0.5-2.0 h. The optimal HRT for denitrification was 2.0 h with a rate of 14.81 mg/(L substrate day). HRT significantly affected the bacterial community structure in DR by changing the population dynamics of the dominant bacteria and denitrifying functional bacteria such as Rhizobiaceae, Desulfovibrionaceae, and Arcobacteraceae. Moreover, the HRT of the DR showed a significant effect on the bacterial community in the nitrification reactor and culture water. Reducing HRT can promote the growth of total bacteria in the DR. However, it revealed a limiting effect on the abundance of key genes of the nitrogen cycle, including the amoA, nirK and nosZ. Under the condition of short HRT, the DR can also achieve a good denitrification effect, which provides feasible management measures for nitrogen removal in RAS.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available