scholarly journals Smart and Sustainable Aquaculture Farms

2021 ◽  
Vol 13 (19) ◽  
pp. 10685
Author(s):  
Taher Kassem ◽  
Isam Shahrour ◽  
Jamal El Khattabi ◽  
Ahmad Raslan
Keyword(s):  
Water Quality ◽  
Energy Consumption ◽  
Hydraulic System ◽  
High Performance ◽  
Water Discharge ◽  
Waste Recycling ◽  
Quality Parameters ◽  
Aquaculture System ◽  
Recirculation Aquaculture System ◽  
Reduce Energy Consumption

This paper presents the design and construction of a smart and sustainable fish farm. The farm is based on the hybrid aquaculture concept that combines the advantages of the recirculation aquaculture system (RAS), the zero-water discharge (ZWD), and smart technology. The system’s smartness consists of using the latest technology, including monitoring and automation, ensuring zero water discharge, good water quality, reduced energy consumption, and high biosecurity. In addition, the system does not use chemicals in the aquaculture process. The paper describes the design of this system, including the hydraulic system, the smart monitoring system, the feeding regime, and the control of the biological parameters. Tests conducted in Tabuk, Saudi Arabia, showed high performance of this system with around 90% survival rate. In addition, observations showed the system’s capacity to maintain the water quality parameters within the optimal water quality ranges, reduce energy consumption, and sustain efficient shrimp waste recycling.

scholarly journals High performance envelope design for the modular building system

2021 ◽  
Author(s):  
Hawkins David
Keyword(s):  
Energy Consumption ◽  
High Performance ◽  
Building Envelope ◽  
Building Industry ◽  
Air Infiltration ◽  
Demand Reduction ◽  
Air Tightness ◽  
Reduce Energy Consumption ◽  
Building System ◽  
Hygrothermal Analysis

The best way to reduce energy consumption in homes is to reduce air infiltration and increase thermal resistance of the building envelope. This research aimed to develop four envelope systems for the modular building system that are super insulated and designed for maximum air tightness. Rigid sheathing with taped seams is a superior air sealing strategy compared to existing air barrier systems used in barrier systems used in the modular building industry. Connection details were developed for vulnerable connection locations using long lasting air sealing methodologies. Connection interfaces were modeled with THERM software and two connections had bridging more than Ψ 0.01[W/m⋅k]. Hygrothermal analysis revealed that the moisture content of the structural sheathing layer of the assemblies maintained at safe levels. Annual heating demand reduction of 64-69% was simulated using the proposed four assemblies compared to an OBC 2012 building code baseline envelope assembly.

scholarly journals High performance envelope design for the modular building system

2021 ◽  
Author(s):  
Hawkins David
Keyword(s):  
Energy Consumption ◽  
High Performance ◽  
Building Envelope ◽  
Building Industry ◽  
Air Infiltration ◽  
Demand Reduction ◽  
Air Tightness ◽  
Reduce Energy Consumption ◽  
Building System ◽  
Hygrothermal Analysis

The best way to reduce energy consumption in homes is to reduce air infiltration and increase thermal resistance of the building envelope. This research aimed to develop four envelope systems for the modular building system that are super insulated and designed for maximum air tightness. Rigid sheathing with taped seams is a superior air sealing strategy compared to existing air barrier systems used in barrier systems used in the modular building industry. Connection details were developed for vulnerable connection locations using long lasting air sealing methodologies. Connection interfaces were modeled with THERM software and two connections had bridging more than Ψ 0.01[W/m⋅k]. Hygrothermal analysis revealed that the moisture content of the structural sheathing layer of the assemblies maintained at safe levels. Annual heating demand reduction of 64-69% was simulated using the proposed four assemblies compared to an OBC 2012 building code baseline envelope assembly.

scholarly journals Effect of aeration on growth and production of fish in intensive aquaculture system in earthen ponds

2017 ◽  
Vol 15 (1) ◽  
pp. 113-122 ◽  
Author(s):  
T Sultana ◽  
MM Haque ◽  
MA Salam ◽  
MM Alam
Keyword(s):  
Water Quality ◽  
Soil Quality ◽  
Pond Water ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Phytoplankton Production ◽  
Zooplankton Abundance ◽  
Aquaculture System ◽  
Earthen Ponds ◽  
Intensive Aquaculture

An experiment was conducted to assess the effect of aeration using blower on growth and production of tilapia (Oreochromis niloticus) in intensive aquaculture system in six (6) earthen ponds at BAU campus, Mymensingh from May to September, 2016. Treatment 1 (T1) with 3 aerated ponds and Treatment 2 (T2) with 3 non-aerated ponds were designed with similar stocking density (300/decimal) of tilapia. Oxygen supply was ensured by blower for 9 hours daily when oxygen depletion occurs in pond water. Fish growth, pond water and soil quality parameters were sampled and assessed. The DO content in the aerated ponds was higher (7.23 mg/l) from the beginning to the end of experiment compared to non-aerated ponds (2.33 mg/l). There were significant differences (p<0.05) of DO content between two treatments at first and last sampling stages. The higher length (15.64±1.56 cm) and weight gain (143.36±39.33 gm), higher SGR (% per day) for tilapia was (2.54±0.00) found in T1 compared to T2 (2.42±0.00) with significant differences (p<0.05) between two treatments. In addition, the higher production of tilapia was obtained in T1 (9581.87±0.00 kg/ha/100 days) compared to T2 (6490.80±0.00 kg/ha/100 days). The average phytoplankton production was relatively higher in T2 and conversely zooplankton abundance was higher in T1 without any significant differences (p>0.05) between the treatments for the abundances of various groups of phytoplankton and zooplankton. Different water quality parameters were found with the better range in aerated ponds. Various intrinsic relationships between DO and other water quality and weather parameters showed that DO content had negative relationships with rainfall, air pressure and humidity but the relationships were not statistically significant. Moreover, different soil quality parameters of pond sediments were found in ideal range for fish culture in both treatments. These results suggest that aeration can be a potential mechanism of aqua-farming to enhance the growth and production of tilapia and DO content in pond water synchronizing other water quality parameters in ponds.J. Bangladesh Agril. Univ. 15(1): 113-122, January 2017

Organic characterisation tools for distribution system management

2009 ◽  
Vol 9 (1) ◽  
pp. 1-8 ◽  
Author(s):  
C. W. K. Chow ◽  
Philipp Kuntke ◽  
Rolando Fabris ◽  
Mary Drikas
Keyword(s):  
Water Quality ◽  
Organic Carbon ◽  
Distribution System ◽  
High Performance ◽  
Distribution Systems ◽  
Management Strategies ◽  
Molecular Size ◽  
Quality Parameters ◽  
Size Exclusion ◽  
Treated Drinking Water

In this investigation, high-performance size exclusion chromatography (HPSEC) was used to characterise organic matter in treated drinking water at key sampling locations along two selected distribution systems (chlorinated and chloraminated). Other water quality parameters such as colour, UV254, dissolved organic carbon (DOC) and assimilable organic carbon (AOC) as measured by bacterial regrowth potential (BRP), were also determined. One of the aims of this work was to develop new tools to monitor organic character change along the distribution system in order to identify impacting factors and develop management strategies based on water quality change. This study used samples from two contrasting distribution systems with different disinfection regimes and organic characteristics together with samples generated from laboratory simulations. System 1 is a chlorinated distribution system and generally requires elevated chlorine dosage to meet the demand due to the high DOC level. System 2 is a chloraminated system with stable water quality, low DOC and low chloramine dose (mild oxidation). Molecular size distribution determination using HPSEC is a very informative technique in assessing treatment processes and in this study the appearance of a molecular peak at 1,700 Da that can be used as an indicator of biological activity in distribution systems was confirmed. The use of BRP values, for upstream and downstream samples in the distribution system, was found to be a good approach to assess biological impacts on water stability. The observed biological impact from the biofilms between the studied systems were particularly useful in confirming the organic characterisation results.

scholarly journals Recirculating system using biological aerated filters on tambaqui fingerling farming

2019 ◽  
Vol 54 ◽  
Author(s):  
Jô de Farias Lima ◽  
Daniel Montagner ◽  
Sting Silva Duarte ◽  
Eliane Tie Oba Yoshioka ◽  
Márcia Kelly Reis Dias ◽  
...  
Keyword(s):  
Water Quality ◽  
Hematological Parameters ◽  
Quality Parameters ◽  
Ichthyophthirius Multifiliis ◽  
Recirculating Aquaculture ◽  
Aquaculture System ◽  
Solids Concentration ◽  
Similar Materials ◽  
The Media ◽  
Biological Filters

Abstract: The objective of this work was to evaluate a recirculating aquaculture system using biological aerated filters in tanks for tambaqui (Colossoma macropomum) fingerlings farming, with two initial stocking densities (1.4 and 2.5 kg m-3). The biofilters had similar materials (media) and the same granulometric standards, but inverted orders of the media (classic and inverted). The following were monitored for 90 days: water quality; zootechnical, parasitological, and hematological parameters; and hematimetric indices. Water temperature, oxygen levels, pH, electrical conductivity, and dissolved solids concentration were compatible with tambaqui farming and did not differ between the different biofilters and densities. The ammonia and nitrite value was associated with the stocking densities and not with biofilter. The zootechnical and hematological parameters and the hematimetric indices evaluated were not influenced either by the type of biofilter or by the stocking densities. Ichthyophthirius multifiliis, Anacanthorus spathulatus, Notozothecium janauachensis, and Mymarothecium boegeri were the parasites found. The aerated, classical, and inverted biological filters have similar efficiency in maintaining water quality parameters for tambaqui fingerling farming.

scholarly journals Análise de Características Comportamentais de Aplicações OpenMP para Redução do Consumo de Energia

2018 ◽  
Author(s):  
Gabriel B. Moro ◽  
Lucas Mello Schnorr
Keyword(s):  
Operating System ◽  
Energy Consumption ◽  
High Performance Computing ◽  
High Performance ◽  
Previous Analysis ◽  
Computer Systems ◽  
Specific Knowledge ◽  
Reduce Energy Consumption ◽  
Performance Computing ◽  
Processor Frequency

Performance and energy consumption are fundamental requirements in computer systems. A very frequent challenge is to combine both aspects, searching to keep the high performance computing while consuming less energy. There are a lot of techniques to reduce energy consumption, but in general, they use modern processors resources or they require specific knowledge about application and platform used. In this paper, we propose a library that dynamically changes the processor frequency according to the application's computing behavior, using a previous analysis of its Memory-Bound regions. The results show a reduction of 1,89% in energy consumption for Lulesh application with an increase of 0,09% in runtime when we compare our approach against the governor Ondemand of the Linux Operating System.

scholarly journals Assessment of water quality of Garmat Ali river for irrigation purposes

2019 ◽  
Vol 118 ◽  
pp. 03054
Author(s):  
Dina A. Yaseen ◽  
Saad Abu-Alhail ◽  
Haider A. Khanfar
Keyword(s):  
Water Quality ◽  
Water Discharge ◽  
Quality Parameters ◽  
Polluted Water ◽  
Wet Season ◽  
Severe Problem ◽  
Discharge Point ◽  
Food And Agriculture ◽  
Sodium Toxicity ◽  
Sodium Percentage

This study investigates the suitability of Garmat Ali river (Iraq) for irrigation uses. Two stations were chosen: station A; far from any polluted water discharge point, and station C; near to a very contaminated water discharge point). Water samples were picked up and tested for pH, electrical conductivity, total dissolved solids, sodium, potassium, calcium, magnesium, bicarbonate, sulfate, chlorine, and nitrate. Three samples were collected in January and March 2019 from each site, to reflect the wet season in Iraq. Besides the classification of water quality parameters of Garmat Ali river for watering, other parameters were also calculated, such as sodium adsorption ratio, soluble sodium percentage, exchangeable sodium percentage, magnesium hazard, kelly ratio, permeability index, and potential salinity. According to the Food and Agriculture Organization (FAO) guidelines, the overall results showed that the salinity and chlorine were within the range that causing severe problem to plants. In addition, sodium toxicity and hazard were classified the river water as unsuitable for irrigation. Potential salinity was under the class of unsuitable for irrigation. Bicarbonate hazard was under the category “slight to moderate”. However, the remaining parameters were within the accepted range. Most of the contaminants were higher in the polluted station.

scholarly journals Water Quality Parameters for the Culture of Rainbow Trout, Oncorhynchus mykiss (Walbaum) in the Raceways of Kathmandu, Nepal

Our Nature ◽  
2015 ◽  
Vol 13 (1) ◽  
pp. 50-57
Author(s):  
Rakesh Prasad Bhagat ◽  
Sudip Barat
Keyword(s):  
Water Quality ◽  
Electrical Conductivity ◽  
Rainbow Trout ◽  
Relative Humidity ◽  
Water Discharge ◽  
Quality Parameters ◽  
Water Velocity ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Rainbow Trout Oncorhynchus Mykiss

Eighteen water quality parameters (5 physical, 9 chemical, 2 climatic and 2 geographical) were investigated for the water quality assessment so as to know whether water in the raceways from spring-fed torrential stream at a high altitude was feasible and suitable for the culture of rainbow trout, Oncorhynchus mykiss (Walbaum) or not. Results indicated colourless, odourless, and crystal-clear water throughout the year with air temperature ranging from 11.4-26.9 (20.3±1.1oC), water temperature 8.4-21.5 (16±1.1oC), water velocity 1.5-3.5 (2.5±0.11m sec-1), water discharge 37-92 (56±2.87L sec-1), turbidity 3-19 (11± 1.04NTU), pH 6.5-8.2 (7.44±0.11), electrical conductivity 35-204 (112.13±11.2µS cm-1), dissolved oxygen 5.9-10.5 (8.2±0.3mg L-1), free carbon dioxide 1.4-5.1 (3.6±0.2mg L-1), total alkalinity 17-97 (55.1±5.32mg L-1), total hardness 11-90 (47±5.06mg L-1), phosphate-P 0.01-0.50 (0.14±0.02mg L-1), ammonium-N 0.09-0.91 (0.28 ±0.04mg L-1), nitrate-N 0.01-0.83 (0.17±0.04mg L-1), relative humidity 62.4-88.7 (75.01±1.59%), rainfall 0.0-503.4 (132.44±32.83mm), altitude 1550msl, and water resource stream-fed torrential stream. Correlation analyses of the parameters showed strongest correlation at the significance level of 0.01. All parameters were positively correlated except pH, electrical conductivity, dissolved oxygen, total alkalinity, and total hardness which were negatively correlated with rest. Parameters of the first year were slightly higher than second due to fluctuation in temperature, velocity and discharge, relative humidity, and rainfall influenced by climatic factors, geography, seasons, and environment of the origin and occurrence of the water resource, thus affecting rest of the parameters. Water velocity and water discharge could be maintained as per requirement of the culture. These parameters were within permissible limits being feasible and suitable for rainbow trout culture.Our Nature (2015), 13(1): 50-57

scholarly journals Effects of ozonation on water quality and pikeperch (Sander lucioperca) performance in a recirculating aquaculture system

2021 ◽  
Vol 66 (No. 9) ◽  
pp. 381-390
Author(s):  
Jitka Kolářová ◽  
Jiří Křišťan ◽  
Oleksandr Malinovskyi ◽  
Josef Velíšek ◽  
Alžběta Stará ◽  
...  
Keyword(s):  
Water Quality ◽  
Oxygen Demand ◽  
Thiobarbituric Acid ◽  
Treatment Method ◽  
Ozone Treatment ◽  
Control Group ◽  
Thiobarbituric Acid Reactive Substance ◽  
Sander Lucioperca ◽  
Aquaculture System ◽  
Recirculation Aquaculture System

The aim of this study was to examine the effects of ozonation on the water quality, and growth, blood biochemistry, antioxidant capacity and survival of pikeperch (Sander lucioperca) reared in a recirculation aquaculture system for 30 weeks. A group without ozone treatment was used as a control. The ozone application led to a significant reduction of the water chemical oxygen demand, biological oxygen demand and unsuspended solids concentration. The results revealed that an ozone treatment as a water treatment method has a positive influence on the intensive culture of pikeperch ensuring a higher survival rate (77%) compared to the non-treated control group (67.2%). Moreover, the ozonation prevented fin damage to a large extent and reduced the prevalence of an Ichthyophthirius multifiliis infection. Furthermore, the ozone application led to a reduction in the thiobarbituric acid reactive substance level and enhanced the superoxide dismutase activity in the fish gills. However, the effect of ozonation was null on the plasma biochemical parameters. Overall, these findings suggest that an ozone treatment, using adequate technological equipment to destroy the residual ozone, improves the water quality and protects pikeperch against any possible infection and fin damage in a recirculation aquaculture system.

Sign in / Sign up

Export Citation Format

Share Document