Aquacultural Engineering最新文献

{"title":"Nascent application of aerobic granular sludge for recirculating aquaculture system effluent treatment: Performance, granule formation, and microbial community","authors":"Talvikki Suhonen ,&nbsp;Raed A. Al-Juboori ,&nbsp;Antonina Kruglova ,&nbsp;Jani Pulkkinen ,&nbsp;Jouni Vielma ,&nbsp;Anna Mikola","doi":"10.1016/j.aquaeng.2023.102361","DOIUrl":"10.1016/j.aquaeng.2023.102361","url":null,"abstract":"<div><p>This study presents for the first time an evaluation of the feasibility of aerobic granular sludge (AGS) for treating recirculating aquaculture system (RAS) effluent in a sequential batch reactor configuration for nutrient removal. An AGS process was started using synthetic wastewater to grow the granules, and the feed was then switched to RAS effluent, and a systematically decreasing carbon supplementation was applied. Total nitrogen removal significantly decreased from around 75 % to as low as 13 %, but granules could restore their performance when allowed enough time (2 weeks) to acclimate to the change in feed. The dynamics of AGS microbial communities were followed by Illumina sequencing. A high abundance of microbial populations—indicating dense and stable granules—was observed after 97 days of operation with RAS wastewater. In particular, the genera <em>Neomegalonema, Hydrogenophaga, Thauera, Bdellovibrio, Flavobacterium,</em> and <em>Pseudomonas</em> represented most of the community, showing the heterotrophic, denitrifying, and phosphorus-accumulating potential of the studied operational design. The AGS showed promising results for a small-footprint solution for RAS treatment, but the energy consumption of aeration and carbon addition still requires further development.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"103 ","pages":"Article 102361"},"PeriodicalIF":4.0,"publicationDate":"2023-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49076572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Industry 4.0-based smart systems in aquaculture: A comprehensive review","authors":"Vitorino Biazi,&nbsp;Carlos Marques","doi":"10.1016/j.aquaeng.2023.102360","DOIUrl":"10.1016/j.aquaeng.2023.102360","url":null,"abstract":"<div><p>The Aquaculture industry is a sector that faces difficulties in maintaining a high-quality production of food in a sustainable way due to the technological limitations of the commercial tools and the lack of integration of systems and sensors that can monitor the environmental variables and physiological characteristics of the animals. In most aquaculture farms, human operators are still responsible for collecting data manually and over long time intervals. In this way, management and decision-making depends on the operator's experience and can be negatively affected by human subjectivity. The application of Industry 4.0 concepts to collect and store data in real time using interconnected sensors and other automated equipment allows to increase the accuracy of the farm's operation and support faster and evidence-based decisions. This work presents an overview of some Industry 4.0-based approaches used to improve the quality, productivity and sustainability of the aquaculture industry. Initially, the Industry 4.0 definition and main concepts are presented as well as the consequences of its implementation for the improvement of general industrial processes. Following that, the current scenario of the aquaculture industry in terms of global food production and the main limitations of the sector that can be supported by intelligent systems to improve results are presented. In the next sections, specific technologies such as camera systems for animal and environmental monitoring, sensing networks and IoT to collect, transmit and store data, automated devices to support some activities and monitoring tasks, tools to support data interpretation and decision-making and modern sensing strategies for hard-to-monitor parameters are detailed. This review article shows the feasibility of using the aforementioned technologies to improve results of the aquaculture industry and, due to its advantages, it is believed that its widespread use can fill the existing gaps in this field of research in the next years.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"103 ","pages":"Article 102360"},"PeriodicalIF":4.0,"publicationDate":"2023-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47946499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feeding intensity assessment of aquaculture fish using Mel Spectrogram and deep learning algorithms","authors":"Zhuangzhuang Du ,&nbsp;Meng Cui ,&nbsp;Qi Wang ,&nbsp;Xiaohang Liu ,&nbsp;Xianbao Xu ,&nbsp;Zhuangzhuang Bai ,&nbsp;Chuanyu Sun ,&nbsp;Bingxiong Wang ,&nbsp;Shuaixing Wang ,&nbsp;Daoliang Li","doi":"10.1016/j.aquaeng.2023.102345","DOIUrl":"10.1016/j.aquaeng.2023.102345","url":null,"abstract":"<div><p><span>Accurately and objectively analyzing fish feeding intensity is essential to guiding feeding and production techniques. Fish feeding intensity in recirculating aquaculture systems (RAS) can be used to indicate a fish's appetite. However, the low efficiency and lack of objectivity of manual observation are problems with current fish feeding intensity assessment processes. Applying acoustic techniques to aquaculture issues is an insufficiently explored area that requires new investigations, particularly into methods that explore temporal information in acoustic spectrograms. With </span><em>Oplegnathus punctatus</em> as the experimental species, we proposed a fish feeding intensity detection method based on the Mel Spectrogram and MobileNetV3-SBSC lightweight networks. First, the <em>Oplegnathus punctatu</em>s feeding sound dataset, which has a total of 3 types—\"strong,\" \"medium,\" and \"none,\" was built. Next, Mel Spectrogram feature maps were extracted using steps including preprocessing, Fast Fourier Transform (FFT), Mel filter bank (MFB), etc. Finally, the MobileNetV3-SBSC lightweight network was used to detect and recognize the obtained feature maps. Experimental results indicated that the proposed MobileNetV3-SBSC model, as compared to the MobileNetV3-S model, improved test accuracy by 4.6% and decreased test loss by 67.4% with only a 0.84% increase in the number of parameters and a 3.08% increase in the model size. Additionally, we have verified that the accuracy of the test set was 59.6%, 53.3%, 83.3%, 85.3%, and 85.9% for groups of 5, 15, 40, 70, and 100 fish, respectively. This study demonstrated that the proposed method is not applicable to a small number of fish, which means that when the numbers of fish are small, changes in the feeding of individual fish would have a significant effect on the whole feeding feature map, leading to negligible changes in feeding features. However, in view of the commonly high aquaculture density, the proposed method can be used to automatically and objectively examine fish feeding, which could provide a theoretical basis and methodological support for further feeding decisions.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102345"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43411026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentation efficiency evaluation of an aquaculture tank through experimental floc characterization and CFD simulation","authors":"Boris Miguel López-Rebollar,&nbsp;Daury García-Pulido,&nbsp;Carlos Diaz-Delgado,&nbsp;Ivan Gallego-Alarcón,&nbsp;Juan Antonio García-Aragón,&nbsp;Humberto Salinas-Tapia","doi":"10.1016/j.aquaeng.2023.102343","DOIUrl":"10.1016/j.aquaeng.2023.102343","url":null,"abstract":"<div><p><span>One of the most important parameters for the proper functioning of an aquaculture tank<span><span> is water quality. The survival and healthy growth of fish depends on it. The main factors affecting water quality are the remains of food and feces of fish which form cohesive particles called flocs that are kept within the tank or in the modules of the recirculating aquaculture system (RAS). Through the application of non-invasive optical techniques such as particle tracking </span>velocimetry (PTV) it was possible to experimentally characterize the particles from aquaculture tanks obtaining diameters and settling velocity distribution, which allowed estimating the effective density of the flocs. With these parameters, the discrete phase model (DPM) was applied using computational fluid dynamics (CFD) to estimate the position and velocity of the particles within a prototype tank with geometry that promotes hydrodynamics suitable for particles sedimentation while maintaining the conditions for fish growth. Through an experimental validation it was verified that by having a tank with circular geometry, central settler made of concentric cylinders, perimeter gratings and outlet </span></span>spillway cone, it is possible to achieve an efficiency of 77.91–90% of particles sedimentation not exceeding 1 h in the process. Thus, through computer simulation coupled with experimental validation, it was possible to establish geometric parameters for the design of aquaculture tanks with self-cleaning characteristics under the sustainable scheme of water recirculation and reuse.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102343"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46208009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Steady-state and dynamic model for recirculating aquaculture systems with pH included","authors":"Allyne M. dos Santos ,&nbsp;Lucas F. Bernardino ,&nbsp;Kari J.K. Attramadal ,&nbsp;Sigurd Skogestad","doi":"10.1016/j.aquaeng.2023.102346","DOIUrl":"10.1016/j.aquaeng.2023.102346","url":null,"abstract":"<div><p><span>In this work, simplified steady-state and dynamic models of a Recirculating Aquaculture System (RAS) of Atlantic salmon (</span><span><em>Salmo salar</em></span><span>) are described. The RAS process under study includes a fish tank, a biofilter, a CO</span>₂<span> stripper, and an oxygen cone. Compared to existing models, the main contribution is that it explicitly models the pH, by using reaction invariants such as total inorganic carbon (TIC), total ammonia nitrogen (TAN), and alkalinity. As the possibility of placing the pH/alkalinity adjustment (base or buffer addition) into the fish tank or into the biofilter was considered, four steady-state scenarios were studied, where one of the adjustments is utilized in each scenario. A dynamic simulation of the process with oxygen and pH controllers was performed and compared with commercial RAS production data, and what adjustments had to be done to get an agreement between the model and the plant data.</span></p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102346"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47678613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing traditional vs. biodegradable seed mussel collectors (SMCs) for seed settlement, seed density, and seed growth: Effect of deployment depth and location","authors":"Lisanne A. van den Bogaart ,&nbsp;Jildou Schotanus ,&nbsp;Jacob J. Capelle ,&nbsp;Tjeerd J. Bouma","doi":"10.1016/j.aquaeng.2023.102344","DOIUrl":"10.1016/j.aquaeng.2023.102344","url":null,"abstract":"<div><p>Mussel bottom culture is historically based on transplanting wild mussel seed to designated culture plots. Seed mussel collectors (SMCs) that are deployed in the water column are gradually replacing benthic mussel beds for mussel seed resource provisioning. Traditional SMCs consist of weighted filamentous nylon ropes. The performance of SMCs are promising, but the major disadvantages are the increased cost, effort, and the use of non-sustainable materials. In this study, we developed an innovative SMC: the BioShell-SMC. It consists of a coconut core rope surrounded by empty cockle shells that are held in place by biodegradable socking. The advantage of this system compared to traditional SMCs is that it provides biodegradable and sustainable resource material suitable for on-bottom placement. We compared its relative performance to that of a traditional SMC at different deployment depths and locations used for SMC deployment in the Dutch Wadden Sea and Oosterschelde. The results from this experiment indicated that in six out of nine locations mussel seed biomass was comparable between the two collector types. On both collector types, mussel seed biomass was higher in the Wadden Sea than in the Oosterschelde. We also found that mussel seed biomass development was not affected by deployment depth, though mussels were more numerous and shorter in deep water. The results of the current study provide a promising start toward a more sustainable mussel seed collection for bottom cultivation.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102344"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41659381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ebb and flow versus constant water level on the sweet banana chili pepper (Capsicum annuum) production in an aquaponic system","authors":"Nicholas Romano ,&nbsp;Shahidul Islam ,&nbsp;Hayden Fischer","doi":"10.1016/j.aquaeng.2023.102340","DOIUrl":"10.1016/j.aquaeng.2023.102340","url":null,"abstract":"<div><p><span>Bell siphons are used in aquaponic<span> systems to create rising and falling water levels in plant culture beds that facilitates water exchanges and elevates dissolved oxygen (DO) although this may also remove nutrient rich organic debris from the plant culture bed. Sweet banana chili pepper (</span></span><span><em>Capsicum annuum</em></span>) plants were aquaponically grown until maturity and then further cultured in a media-filled bed with or without a bell siphon for one month in triplicate. Water quality was measured throughout as well as the total chili number, weight, mineral composition and sugar levels. Channel catfish (30 individuals/replicate; initial weight = 289 g ± 10.2) were fed twice/day for 5 days/week. Results showed that a bell siphon significantly increased DO in both the fish and plant culture tanks, but dissolved nitrogen and pH were similar. Fish growth, survival and feeding efficiency were similar among treatments. The total count (982 and 747) and weight of chilies (7450 and 7413 g) were similar without or with a bell siphon, but individually, chilies were significantly heavier with a bell siphon. Soluble and insoluble sugars were unaffected but among the tested minerals, sodium, potassium, calcium and zinc were significantly elevated in chilies cultured without a bell siphon. The lower mineral content was likely due to the bell siphon removing excess organic debris from the media-filled plant culture bed that would otherwise be mineralized. Based on these findings and under the culture conditions, bell siphons may not provide benefits to plant production and the lower DO may be mitigated by providing additional aeration in the plant culture bed.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102340"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48944072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing sensing techniques for detecting markers of approaching ecdysis in juvenile tropical rock lobsters, Panulirus ornatus","authors":"Charles Sutherland ,&nbsp;Alan Henderson ,&nbsp;Andrew J. Trotter ,&nbsp;Dean Giosio ,&nbsp;Greg Smith","doi":"10.1016/j.aquaeng.2023.102342","DOIUrl":"10.1016/j.aquaeng.2023.102342","url":null,"abstract":"<div><p><span><span>The development of hatchery technology for </span>spiny lobsters<span><span> has promoted interest in the establishment of a commercial on shore lobster aquaculture industry in Australia. Cannibalism in culture is extensive with cannibalistic interactions occurring during a relatively brief vulnerability while moulting. Therefore, pre-ecdysis characterisation would create an opportunity to intervene and disrupt cannibalism. Detecting pre-ecdysis with a sensor would open the scope of research into cannibalism reducing culture environments. During this study, three markers that have the potential to indicate ecdysis are assessed: growth of the new </span>integument, formation of </span></span>suture lines, and pigment changes. These markers were assessed using high frequency imaging ultrasound, computer vision, and digital image analysis in the HSV colour space, respectively.</p><p><span>For individual animals, carotenoid pigment shift is an early and clear marker of pre-ecdysis, however variability between individuals excludes </span>pigmentation<span> being useful in characterising pre-ecdysis. Suture line definition was problematic under visible light because its definition was reduced by similarly coloured pigments, therefore using suture lines as a pre-ecdysis characteriser requires better definition. A logical research approach to enhance suture line clarity in images is to image them with light outside the visible spectrum. Growth of the new integument was visible on sonographs beneath the branchiostegites indicating that ultrasound may be a useful tool for sensing pre-ecdysis in lobsters. Ultrasonic investigation using a single element transducer may be a lower cost and robust sensing solution to detect new integument growth and is a high priority future research pathway.</span></p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102342"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49460254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MSIF-MobileNetV3: An improved MobileNetV3 based on multi-scale information fusion for fish feeding behavior analysis","authors":"Yuquan Zhang ,&nbsp;Chen Xu ,&nbsp;Rongxiang Du ,&nbsp;Qingchen Kong ,&nbsp;Daoliang Li ,&nbsp;Chunhong Liu","doi":"10.1016/j.aquaeng.2023.102338","DOIUrl":"10.1016/j.aquaeng.2023.102338","url":null,"abstract":"<div><p>Assessing the intensity of fish feeding activity using fish feeding behavior can help farmers efficiently decide on the amount of feeding bait. However, accurate extraction of fish feeding behavior features is difficult because of the small area of fish in the image and the randomness of fish swimming. To address this problem, an improved MobileNetV3 network, namely multi-scale information fusion (MSIF)-MobileNetV3, was proposed for analyzing the fish feeding behavior. Specifically, MSIF is a novel channel attention module used to replace the Squeeze-and-Excitation (SE) module that improves the attention of the model to fish schools behavior in feeding images using spatial information integration and multi-scale feature fusion. To evaluate the effectiveness of the proposed method, its performance was compared with that of the MobileNetV3 network optimized using multiple training strategies and other classical convolutional neural networks. It was trained and tested using a self-built dataset, and the experimental results showed that the MSIF-MobileNetV3 network using a basic training strategy obtained an optimal classification accuracy of 96.4 % on the test set. Thus, by analyzing the feeding activity of fish, the proposed method can assist in the automatic selection of bait feed under factory farming conditions.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102338"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48628305","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Smart headset, computer vision and machine learning for efficient prawn farm management","authors":"Mingze Xi ,&nbsp;Ashfaqur Rahman ,&nbsp;Chuong Nguyen ,&nbsp;Stuart Arnold ,&nbsp;John McCulloch","doi":"10.1016/j.aquaeng.2023.102339","DOIUrl":"https://doi.org/10.1016/j.aquaeng.2023.102339","url":null,"abstract":"<div><p>Understanding the growth and distribution of the prawns is critical for optimising the feed and harvest strategies. An inadequate understanding of prawn growth can lead to reduced financial gain, for example, crops are harvested too early. The key to maintaining a good understanding of prawn growth is frequent sampling. However, the most commonly adopted sampling practice, the cast net approach, is unable to sample the prawns at a high frequency as it is expensive and laborious. An alternative approach is to sample prawns from feed trays that farm workers inspect each day. This will allow growth data collection at a high frequency (each day). But measuring prawns manually each day is a laborious task. In this article, we propose a new approach that utilises smart glasses, depth camera, computer vision and machine learning to detect prawn distribution and growth from feed trays. A smart headset was built to allow farmers to collect prawn data while performing daily feed tray checks. A computer vision + machine learning pipeline was developed and demonstrated to detect the growth trends of prawns in 4 prawn ponds over a growing season.</p></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"102 ","pages":"Article 102339"},"PeriodicalIF":4.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50174026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}