Microscreen effects on water quality in replicated recirculating aquaculture systems

Fernandes, Paulo; Pedersen, Lars‐Flemming; Pedersen, Palle

doi:10.1016/j.aquaeng.2014.10.007

Cited by 36 publications

(29 citation statements)

References 52 publications

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“…The nitrate-N level was approximately 60 mg N/L (Fig. S12), which is comparable to previous studies performing in similar conditions Fernandes et a., 2015).…”

Section: A N U S C R I P Tsupporting

confidence: 90%

Ozonation control and effects of ozone on water quality in recirculating aquaculture systems

et al. 2018

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To address the undesired effect of chemotherapeutants in aquaculture, ozone has been suggested as an alternative to improve water quality. To ensure safe and robust treatment, it is vital to define the ozone demand and ozone kinetics of the specific water matrix to avoid ozone overdose. Different ozone dosages were applied to water in freshwater recirculating aquaculture systems (RAS). Experiments were performed to investigate ozone kinetics and demand, and to evaluate the effects on the water quality, particularly in relation to fluorescent organic matter. This study aimed at predicting a suitable ozone dosage for water treatment based on daily ozone demand via laboratory studies. These ozone dosages will be eventually applied and maintained at these levels in pilot-scale RAS to verify predictions. Selected water quality parameters were measured, including natural fluorescence and organic compound concentration changes during ozonation. Ozone reactions were described by first order kinetics. Organic matter, assessed as chemical oxygen demand and fluorescence, decreased by 25% (low O), 30% (middle O) and 53% (high O), while water transmittance improved by 15% over an 8-day period. No fish mortality was observed. Overall, this study confirms that ozone can improve RAS water quality, provides a better understanding of the ozone decay mechanisms that can be used to define further safe ozone treatment margins, and that fluorescence could be used as a monitoring tool to control ozone. This study might be used as a tool to design ozone systems for full-scale RAS by analysing water sample from the specific RAS in the laboratory.

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“…The nitrate-N level was approximately 60 mg N/L (Fig. S12), which is comparable to previous studies performing in similar conditions Fernandes et a., 2015).…”

Section: A N U S C R I P Tsupporting

confidence: 90%

Ozonation control and effects of ozone on water quality in recirculating aquaculture systems

et al. 2018

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“…Fernandes et al . () reported that systems with different microscreens (i.e. 100, 60 and 20 μm) presented 3.5 times less particles than the control systems, and fine mesh (20 μm) treatment groups reaching steady state faster than systems with 60 or 100 μm.…”

Section: Physical Filtration Equipments Of Rassmentioning

confidence: 98%

A review on the research status and development trend of equipment in water treatment processes of recirculating aquaculture systems

Xiao

Wei

et al. 2018

Reviews in Aquaculture

164

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Recirculating aquaculture systems (RASs) are intensive aquaculture facilities models that depend on diverse water treatment equipment to maintain good water quality and produce safe and healthy high-quality aquatic products. This article combines the main farming-mode of water purification recirculating processes with recent cultivation-mode scientific research and the current development of the recirculating aquaculture industry. Harmful substances are present in aquaculture wastewater due to large quantities of residual particulate matter such as residual feed, faeces and small suspended solid particles, as well as ammonia, nitrite, bacteria and carbon dioxide (CO 2 ), in the water. These harmful substances seriously affect the quality of aquatic products, so water treatment equipment is needed to remove these substances, add oxygen (O 2 ) to the water and adjust the temperature of the water to ensure a high-quality environment for fish survival. This article reviews the equipment for physical filtration (e.g. solid-liquid separation equipment, microscreen drum filter and foam fractionator) that could remove suspended solids during the water treatment of RASs and the equipment for biological filtration (e.g. fluidized sand biofilter (FSB), moving-bed biofilm reactor (MBBR) and rotating biological contactor (RBC)) that could remove ammonia nitrogen, nitrite and other hazardous substances from wastewater, as well as equipment for water disinfection and sterilization, O 2 addition, CO 2 removal and temperature control. Comprehensive analysis and discussion of water treatment efficiency are provided for reference to create efficient high-end recirculation aquaculture models and increase the precision and intelligence degree of recirculating water treatment technologies in the future.

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“…There is an increasing need to screen water in surface water collection systems to remove floating debris and small aquatic organisms to protect the receiving water bodies [37]. Previous studies found that a microscreen can remove solids by 3.5 times regardless of mesh size, but it is not effective in lessening the amount of dissolved substances [38]. The main purpose of using a microscreen in this study was to make the water free from debris or other larger particles, such as floatables, which may have clogged the channel by depositing on the channel bed.…”

Section: Site Descriptionmentioning

confidence: 99%

Water Quality Improvement and Pollutant Removal by Two Regional Detention Facilities with Constructed Wetlands in South Texas

Guerrero¹,

Mahmoud

Alam

et al. 2020

Sustainability

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Stormwater runoff introduces several pollutants to the receiving water bodies that may cause degradation of the water quality. Stormwater management systems such as detention facilities and wetland can improve the water quality by removing various pollutants associated with the runoff. The objective of this research project is to determine the performance and efficiency of two major regional detention facilities (RDFs) with different designs and structures in reducing pollutants based on various storm events in McAllen, Texas. The two sites are the McAuliffe RDF and the Morris RDF; each site was incorporated with a constructed wetland with a different design and structure to enhance the pollutant removal process. The McAuliffe RDF reduced the concentration and load of many stormwater constituents in comparison to the Morris RDF. The observed concentrations and pollutant loads of suspended solids were much lower in the runoff of the inlet compared to the outlet for both sites. The McAuliffe RDF showed better concentration and load reduction for nutrients, such as nitrogen and phosphorus, of different species. However, both sites did not show a significant improvement of organic material. In addition, the indicator bacteria concentration represented a fluctuation between the inlet and outlet at each site.

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Microscreen effects on water quality in replicated recirculating aquaculture systems

Cited by 36 publications

References 52 publications

Ozonation control and effects of ozone on water quality in recirculating aquaculture systems

Ozonation control and effects of ozone on water quality in recirculating aquaculture systems

A review on the research status and development trend of equipment in water treatment processes of recirculating aquaculture systems

Water Quality Improvement and Pollutant Removal by Two Regional Detention Facilities with Constructed Wetlands in South Texas

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