Aquacultural Engineering最新文献_第4页

Collection rates of detached mobile sea lice according to net mesh and body size: A benchtop model 根据网目数和身体尺寸分离的移动海虱收集率：台式模型

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-02-05 DOI: 10.1016/j.aquaeng.2025.102514

Luke T. Barrett , Frode Oppedal , Minnie Harvey , Christiane Eichner , Florian Sambraus , Sussie Dalvin

{"title":"Collection rates of detached mobile sea lice according to net mesh and body size: A benchtop model","authors":"Luke T. Barrett , Frode Oppedal , Minnie Harvey , Christiane Eichner , Florian Sambraus , Sussie Dalvin","doi":"10.1016/j.aquaeng.2025.102514","DOIUrl":"10.1016/j.aquaeng.2025.102514","url":null,"abstract":"<div><div>A variety of aquaculture activities, such as crowding and delousing treatments, can lead to mobile parasitic stages of salmon lice (<em>Lepeophtheirus salmonis</em>) and sea lice (<em>Caligus elongatus</em>) being detached from host salmon (<em>Salmo salar</em>) and entering the environment, where they may pose a reinfestation risk for farmed or wild fish. Here, we constructed a benchtop physical model to simulate the retention of detached mobile lice (<em>L. salmonis</em> and <em>C. elongatus</em>) within crowding nets of differing mesh sizes and mesh types: 0.8, 1.6 and 2.0 mm polyester square mesh, and catchLICE™ mesh, a nominal 2.0 mm hexagonal weave. Mesh types and louse classes (species, life stage, sex) were each measured according to standardized methods. The 0.8 mm square mesh retained all mobile life stages of both sexes (pre-adult I to adult <em>L. salmonis</em>, and adult <em>C. elongatus</em>), while the 1.6 mm square mesh retained all pre-adult II female and adult <em>L. salmonis</em>, but not all adult <em>C. elongatus</em>. The 2 mm square mesh and catchLICE™ mesh retained all adult female <em>L. salmonis</em>, with varying loss rates for all other louse classes. Measurements of the cephalothorax length, width and height of each louse stage indicated that size was not the sole determinant of collection success, as lice that might have fitted through the mesh openings were often retained, even after repeated ‘flushing’ flow events. Behavioural observations of lice grasping and crawling on the net surface may partly explain this discrepancy. Overall, finer-meshed crowding nets offer a partial solution to loss of lice during crowding, especially for the largest life stages.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"110 ","pages":"Article 102514"},"PeriodicalIF":3.6,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cost effective optimization of bacteria removal in Nannochloropsis oceanica concentrates 海洋纳米绿藻浓缩液除菌的成本效益优化

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-01-20 DOI: 10.1016/j.aquaeng.2025.102513

Cynthia Couto , Fabio Roselet , Bruno Kubelka , Fernando Gonçalves , Robson Matheus Marreiro Gomes , Juan Rafael Buitrago Ramírez , José Maria Monserrat , Dariano Krummenauer

{"title":"Cost effective optimization of bacteria removal in Nannochloropsis oceanica concentrates","authors":"Cynthia Couto , Fabio Roselet , Bruno Kubelka , Fernando Gonçalves , Robson Matheus Marreiro Gomes , Juan Rafael Buitrago Ramírez , José Maria Monserrat , Dariano Krummenauer","doi":"10.1016/j.aquaeng.2025.102513","DOIUrl":"10.1016/j.aquaeng.2025.102513","url":null,"abstract":"<div><div>The objective of this study was to decrease bacterial contamination and improve the net benefit-cost of the process while preserving the integrity of microalgae cells. The washing process conditions were optimized to increase the rate of bacterial removal, making the process economically viable without impacting cell viability. To this, a Central Composite Rotational Design with four variables and two levels (CCRD 2<sup>4</sup>) was performed, generating 27 experimental units (runs). Cell viability was determined by subculture in culture medium and growth rate calculation. The rate of bacterial removal was estimated by directly counting bacteria in the concentrate before and after undergoing the washing process, and a Partial Budget Analysis estimated the net benefit-cost for each run. The experimental models of each response were combined using the desirability index to find the combination that generated the best result in all responses. The best relation between cell viability, bacterial removal efficiency rate, and PBA was found by repeating the process 5 times at 3.405 g-force at 24 °C for 20 min. To make the washing process economically viable, it was necessary to increase the sales price by 10 %, which is justified by the increase in shelf life that the process generates.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102513"},"PeriodicalIF":3.6,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140085","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}

引用次数: 0

Effect of coconut waste and its biochar as hydroponics substrates on system performance and nitrogen transformation in aquaponics 椰渣及其生物炭作为水培基质对水培系统性能和氮转化的影响

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2025-01-18 DOI: 10.1016/j.aquaeng.2025.102512

Tianpei Li , Xiaochan Wang , Ze Zhu , Oorbessy Gaju , Yinyan Shi , Yuru Chang

{"title":"Effect of coconut waste and its biochar as hydroponics substrates on system performance and nitrogen transformation in aquaponics","authors":"Tianpei Li , Xiaochan Wang , Ze Zhu , Oorbessy Gaju , Yinyan Shi , Yuru Chang","doi":"10.1016/j.aquaeng.2025.102512","DOIUrl":"10.1016/j.aquaeng.2025.102512","url":null,"abstract":"<div><div>Aquaponic systems combine aquaculture and hydroponics, creating a circular and sustainable agricultural model that optimizes nutrient utilization. Improving nitrogen use efficiency is crucial for the system’s operational performance and nutrient cycling. This study explored the growth response of cherry tomatoes (<em>Lycopersicon esculentum</em> var. <em>Cerasiforme</em>) to different substrates, including coconut wastes and their biochar and medical stone, in the decoupled aquaponics system, focusing on reusing ammonia, nitrate and nitrite from crucian carp (<em>Carassius auratus</em>) farming effluent. Cherry tomato plants physiological information (plant height, fresh weight of the whole plant, and weight of tomato fruits, etc) and water quality parameters (ammonia nitrogen, nitrite nitrogen and nitrate nitrogen, pH) were monitored across different compartments. Results showed that using 6 mm columnar biochar as a substrate significantly improved the fresh weight, chlorophyll content, and overall weight of tomato plants, and the nitrogen conversion rate from aquaculture effluent to cherry tomatoes exceeded 89 %. Within 76 days, the relative removal rates of ammonia, nitrite and nitrate were above 84.20 %, 95.13 % and 83.98 %, respectively. The biochar composite with a 6 mm particle size demonstrated superior nitrogen immobilization and removal, suggesting a novel approach for the resource utilization of biomass materials. In conclusion, using biochar composite as a cultivation substrate improves nitrogen conversion rates and overall system efficiency of the aquaponic system, providing an effective and sustainable method for biomass material utilization.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102512"},"PeriodicalIF":3.6,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140088","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}

引用次数: 0

Feeding control and water quality monitoring on bioenergetic fish growth modeling: Opportunities and challenges 饲料控制和水质监测在生物能鱼生长模拟中的应用：机遇与挑战

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-31 DOI: 10.1016/j.aquaeng.2024.102511

Fahad Aljehani , Ibrahima N’Doye , Taous-Meriem Laleg-Kirati

{"title":"Feeding control and water quality monitoring on bioenergetic fish growth modeling: Opportunities and challenges","authors":"Fahad Aljehani , Ibrahima N’Doye , Taous-Meriem Laleg-Kirati","doi":"10.1016/j.aquaeng.2024.102511","DOIUrl":"10.1016/j.aquaeng.2024.102511","url":null,"abstract":"<div><div>Aquaculture systems can benefit from the recent development of advanced control strategies to reduce operating costs and fish loss and increase growth production efficiency, resulting in fish welfare and health. Monitoring the water quality and controlling feeding are fundamental elements of balancing fish productivity and shaping the fish growth process. Currently, most fish-feeding processes are conducted manually in different phases and rely on time-consuming and challenging artificial discrimination. The feeding control approach influences fish growth and breeding through the feed conversion rate; hence, controlling these feeding parameters is crucial for enhancing fish welfare and minimizing general aquaculture costs. In addition to feeding, several important environmental factors, such as temperature, dissolved oxygen, and ammonia, also affect fish health and production. Therefore, there is a critical need to develop control strategies to determine optimal, efficient, and reliable feeding processes and monitor water quality. This paper reviews the main control design techniques for fish growth in aquaculture systems, namely algorithms that optimize the feeding and water quality of a dynamic fish growth process. Specifically, we review model-based control approaches and model-free reinforcement learning strategies to optimize the growth and survival of the fish or track a desired reference live-weight growth trajectory. The model-free framework uses an approximate fish growth dynamic model and does not satisfy constraints. We discuss how model-based approaches can support a reinforcement learning framework to efficiently handle constraint satisfaction and find better trajectories and policies from value-based reinforcement learning.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102511"},"PeriodicalIF":3.6,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140080","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}

引用次数: 0

Effects of light intensity on the behavioural response and physiological parameters of rainbow trout (Oncorhynchus mykiss) 光照强度对虹鳟行为反应及生理参数的影响

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-25 DOI: 10.1016/j.aquaeng.2024.102510

Xiao Liu , Liuyi Huang , Yuyan Li , Jianfeng Guan

{"title":"Effects of light intensity on the behavioural response and physiological parameters of rainbow trout (Oncorhynchus mykiss)","authors":"Xiao Liu , Liuyi Huang , Yuyan Li , Jianfeng Guan","doi":"10.1016/j.aquaeng.2024.102510","DOIUrl":"10.1016/j.aquaeng.2024.102510","url":null,"abstract":"<div><div>Light conditions play a pivotal role in enhancing the welfare of rainbow trout (<em>Oncorhynchus mykiss</em>) in deeper-offshore aquaculture systems in China. However, optimal light intensity and duration for improving rainbow trout welfare remain unclear due to limited foundational knowledge. This study investigated the effects of different light intensities (control group <em>L</em><sub>0</sub>: 0 lx; treatment groups <em>L</em><sub>1</sub>: 42.8 lx, <em>L</em><sub>2</sub>: 59.0 lx, <em>L</em><sub>3</sub>: 63.5 lx, <em>L</em><sub>4</sub>: 73.0 lx) and exposure durations (1 hour and 7 days) on the behavioural responses and physiological parameters of rainbow trout. Behavioural tests measured the frequency of fish crossing a light curtain during a 10-minute period, while physiological parameters including plasma cortisol, total protein (TP), albumin (ALB), triglyceride (TG), total cholesterol (TC), aspartate transaminase (AST), and alanine transaminase (ALT) were assessed after 1-hour and 7-day treatments. Results reveal that the rainbow trout exhibits the highest crossing frequency under <em>L</em><sub>1</sub>, alongside significantly lower levels of cortisol, TP, TG, TC, and AST compared to higher light intensities. In contrast, higher light intensities (<em>L</em><sub>2</sub>, <em>L</em><sub>3</sub>, and <em>L</em><sub>4</sub>) cause increased stress, reflected by elevated plasma cortisol, protein, lipid, and enzyme levels. There are no significant differences in behaviour or physiological responses between <em>L</em><sub>0</sub> and <em>L</em><sub>1</sub>. These findings imply that <em>L</em><sub>1</sub> represents a balanced light intensity that supports natural swimming behaviours with minimal stress, while higher intensities induce elevated stress. Therefore, a light intensity of 42.8 lx (<em>L</em><sub>1</sub>) is recommended to enhance fish welfare in deeper-offshore aquaculture systems when artificial light is utilized.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102510"},"PeriodicalIF":3.6,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140086","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}

引用次数: 0

Towards understanding the dynamic behaviour of bioflocs in a fish tank culture: Integration of fish growth and activated sludge modelling 迈向了解鱼缸养殖中生物絮团的动态行为：鱼类生长和活性污泥模型的整合

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-19 DOI: 10.1016/j.aquaeng.2024.102509

Nurhayati Br Tarigan , Marc Verdegem , Julie Ekasari , Karel J. Keesman

{"title":"Towards understanding the dynamic behaviour of bioflocs in a fish tank culture: Integration of fish growth and activated sludge modelling","authors":"Nurhayati Br Tarigan , Marc Verdegem , Julie Ekasari , Karel J. Keesman","doi":"10.1016/j.aquaeng.2024.102509","DOIUrl":"10.1016/j.aquaeng.2024.102509","url":null,"abstract":"<div><div>Biofloc can improve the nutrient use efficiency of an aquaculture system. However, knowledge of the dynamic behaviour of biofloc related to the nutrient concentration in the water is limited. This study combined the fish growth model with the activated sludge model (ASM), later called fish-ASM, to understand the dynamic behaviour of biofloc in Nile tilapia culture. Fish were fed two types of diets that differ in fiber content. One of the diet contains three times higher fiber, which was formulated by incorporating more non-starch-polysaccharides (NSP). NSP is expected to increase carbon content in the water and promote more biofloc growth. Initial model parameter values were gained from experiments and ASM number 1. In fish-ASM, waste comes from uneaten feed, fish faeces, decay of heterotrophic and autotrophic biomass, and fish gill excretion (ammonia). Heterotrophic and autotrophic biomass then utilize the waste as substrates for their growth and part of the biomass is consumed by fish as natural food. The main model outputs in this study are hourly dynamics of fish, biofloc, and nitrogen in water. After trial and error calibration process, the model was fit to the fish, biofloc, and nitrogen dynamics of the lower fiber diet datasets with relative mean square error of 3 %-34 % to the corresponding average observations. However, future improvement was needed in the higher fiber diet simulation, especially related to biofloc and ammonia dynamics. The study shows that the development of biofloc was strongly influenced by organic matter availability.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102509"},"PeriodicalIF":3.6,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Testing of a passive foam fractionator prototype in a commercial recirculating trout farm 在商业循环鳟鱼养殖场进行被动泡沫分馏机样机的测试

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-13 DOI: 10.1016/j.aquaeng.2024.102507

Kim João de Jesus Gregersen, Lars-Flemming Pedersen

{"title":"Testing of a passive foam fractionator prototype in a commercial recirculating trout farm","authors":"Kim João de Jesus Gregersen, Lars-Flemming Pedersen","doi":"10.1016/j.aquaeng.2024.102507","DOIUrl":"10.1016/j.aquaeng.2024.102507","url":null,"abstract":"<div><div>Foam fractionation has emerged as a technical solution to reduce the build-up of microparticles and dissolved organic matter in recirculating aquaculture systems (RAS). However, commercial application in freshwater RAS is challenging and expensive. In the present study, a simple, low-cost passive foam fractionation (PFF) prototype was developed and tested under commercial conditions. The prototype was tested in a Model Trout Farm (MTF) in three different production raceways during winter and spring to assess the operation and removal potential. A number of different water quality parameters, including organic matter, particles, bacterial activity, and phosphorus were examined in the system water and in the removed foamate. Overall, the PFF prototype removed particles as well as particulate and dissolved organic matter, reduced the amount of bacteria and total phosphorus in the water, regardless of sampling time and place. By utilizing the existing airlifts in the MTF, the associated cost of construction and operation was kept low. Overall, the results demonstrate that the passive foam fractionation has the potential to help address some of aquaculture’s pressing issues in a cost effective manner.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102507"},"PeriodicalIF":3.6,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of diameter-to-depth ratio on the hydrodynamics in recirculating aquaculture tank 水产养殖循环池径深比对水动力的影响研究

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-12 DOI: 10.1016/j.aquaeng.2024.102506

Chenxu Zhao , Yixuan Hu , Xiaozhong Ren , Hangfei Liu , Shupeng Du , Gang Wu , Yinxin Zhou

{"title":"Investigation of diameter-to-depth ratio on the hydrodynamics in recirculating aquaculture tank","authors":"Chenxu Zhao , Yixuan Hu , Xiaozhong Ren , Hangfei Liu , Shupeng Du , Gang Wu , Yinxin Zhou","doi":"10.1016/j.aquaeng.2024.102506","DOIUrl":"10.1016/j.aquaeng.2024.102506","url":null,"abstract":"<div><div>To maximize the spatial utilization rate of the recirculating aquaculture system (RAS) and improve the growth conditions of aquaculture varieties, the present study used the numerical simulation method to investigate the distribution characteristics of the flow velocity inside the aquaculture tank. It is of great practical importance for the design and optimization of the aquaculture tank structures. The computational fluid dynamics (CFD) method and the RNG k-ε turbulent model were applied to analyze the effects of diameter-to-depth ratio <em>(L/H)</em> on the hydrodynamic characteristics inside the aquaculture tank, including the average flow velocity, resistance coefficient, flow velocity uniformity, energy utilization coefficient, vortex and Fraud correction coefficients. The accuracy of proposed method was verified by experimental results. The results show that as the diameter-to-depth ratio <em>(L/H)</em> of the rectangular arc angle aquaculture tank increases, the turbulence intensity in the flow field gradually weakens, the low-velocity area increases, and the average flow velocity decreases. When the diameter-to-depth ratio <em>(L/H)</em> is 3:1–5:1, uniformity coefficients, energy effective use coefficients, and Fraud correction coefficients have significantly been improved, and the flow pattern in the aquaculture tank is the best. Through the research of the present study, it can effectively improve the utlization rate of aquaculture tank space, and provide technical support for the realization of the welfare aquaculture of the recirculating aquaculture system.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102506"},"PeriodicalIF":3.6,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140081","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}

引用次数: 0

Effect of drum filter mesh size on RAS water quality 鼓式滤网孔径对RAS水质的影响

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-12 DOI: 10.1016/j.aquaeng.2024.102508

Kim João de Jesus Gregersen , Petter Olsson , Carles Pellicer-Nàcher , Per Bovbjerg Pedersen

{"title":"Effect of drum filter mesh size on RAS water quality","authors":"Kim João de Jesus Gregersen , Petter Olsson , Carles Pellicer-Nàcher , Per Bovbjerg Pedersen","doi":"10.1016/j.aquaeng.2024.102508","DOIUrl":"10.1016/j.aquaeng.2024.102508","url":null,"abstract":"<div><div>Drum filters play an important role in recirculating aquaculture systems (RAS) by removing particulate matter from production units. Optimizing their performance has significant importance for water quality as well as investment and running costs. One important parameter affecting both issues is the mesh size applied. This study investigates the impact of drum filter mesh size (70, 45, and 30 µm mesh size and a control group without drum filters) on water quality and system performance in a triplicate trial using rainbow trout (Oncorhynchus mykiss), for a period of eight weeks. The use of drum filters led to significantly less particulate organic matter in the RAS water (more than 60 % reduction in particles, particulate BOD, and particulate COD) as well as reduced microbial activity (50 % reduction of microbial activity in water), while no significant reduction in dissolved organic matter was observed. The removal of particulate organic matter led to improvements across most metrics studied. The study demonstrated that mechanical filters had positive effects on water quality parameters and that reducing mesh size from 70 µm to 45 µm led to further improvements in most water quality parameters, while an additional reduction to a 30 µm mesh did not further improve water quality. The findings underscore the importance of particle removal, mesh size selection, and system design to ensure the best removal rates while maintaining maximum filtration capacity. Interestingly, the changes in water quality achieved by the drum filters led to an improvement in feed utilization resulting in increased biomass production. The results suggest that optimizing drum filter mesh size, particularly utilizing 45 µm mesh, can enhance water quality and perhaps operational profitability in RAS.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102508"},"PeriodicalIF":3.6,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and testing of a fully automatic aquatic plant combing machine for Eriocheir sinensis farming 中华绒螯蟹养殖全自动水生植物精梳机的设计与试验

IF 3.6 2区农林科学

Aquacultural Engineering Pub Date : 2024-12-07 DOI: 10.1016/j.aquaeng.2024.102504

Hao Yuan , Jiaao Sun , Jiakai Jiang , Jinsheng Ku , Yueping Sun , Yun Qin

{"title":"Design and testing of a fully automatic aquatic plant combing machine for Eriocheir sinensis farming","authors":"Hao Yuan , Jiaao Sun , Jiakai Jiang , Jinsheng Ku , Yueping Sun , Yun Qin","doi":"10.1016/j.aquaeng.2024.102504","DOIUrl":"10.1016/j.aquaeng.2024.102504","url":null,"abstract":"<div><div>Aquatic plant cleaning in Eriocheir sinensis farming currently relies heavily on manual methods, which are labor-intensive and inefficient. To address this issue, this study explores fully automated aquatic plant raking technology. Considering the physical characteristics of aquatic plant in Eriocheir sinensis farming, a novel approach using torsion spring hooks instead of traditional cutting blades for plant removal is proposed. A aquatic plant combing mechanism and a water depth adjustment mechanism were designed to enhance functionality. Furthermore, a multi-drawer-type aquatic plant spreading method was introduced, along with an automatic mechanism for uniformly spreading aquatic plant. Adams simulation software was employed to analyze the movement of the multi-drawer silo under various working conditions, determining the minimum damping force required for the damping mechanism in extreme scenarios. A prototype was subsequently fabricated and tested. Experimental results confirmed that the combing mechanism operated smoothly without jamming, meeting all design specifications. The prototype demonstrated stable underwater performance, reliable depth adjustment, and high cleaning efficiency, fully aligning with the intended design objectives.</div></div>","PeriodicalId":8120,"journal":{"name":"Aquacultural Engineering","volume":"109 ","pages":"Article 102504"},"PeriodicalIF":3.6,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143140087","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}

引用次数: 0