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Flux de phosphore et collecte des boues d'une pisciculture de moyenne taille.

机译：磷流和中型养鱼场的污泥收集。

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摘要

The production of Quebec's freshwater fish farm industry was reduced due to imposed environmental constraints. By 2014, this industry aims to reduce phosphorus (P) discharge to 4.2 kg of P released/ton of fish produced within the framework of an agreement called "Quebec's freshwater aquaculture development strategy (STRADDAQ)". In Quebec, 91% of the fish farms use at least one pond for fish rearing and culture, which indicates the importance to establish an integrated management system for pond fish farms. However, not enough data is available on the dynamics of P.;The purpose of this study was to establish an annual P balance in fish farm ponds and to identify the main factors for P release in fish farms based on the P mass measured in annual aquaculture sludge removal.;For this purpose, one Quebec fish farm was studied during two years of production. The analysed parameters were: the mass of P in the pond sludge, in the distributed feed and in the fish produced in relation with the hydraulic retention time, the surface overflow load and the fish density. Two similar shotcrete ponds (;The monthly characterization of sludge in the studied ponds showed that between 63 and 91% and between 19 and 83% of P in sludge accumulated under the floating surface aerator in shotcrete pond 2 and earthen pond 3 respectively. Moreover, results of annual sludge removal indicated that the earthen pond, which recovered an estimated 31% of P not taken up by fish, appeared to be more efficient in P retention in comparison with the shotcrete ponds which recovered between 8 to 17% of P not taken up by fish. However, it is possible that removed sludge from the bottom of the earth pond would be taking phosphorus accumulated from previous years of operations and thus, the efficiency of P removal would have been overestimated. A higher hydraulic retention time (HRT), a lower surface overflow rate (SOR) and a lower fish density (f d), as well as stronger P sorption mechanisms in the earthen pond favoured a high efficiency in P removed in sludge.;Results of P balances in ponds showed that from the 100% of P added by distributed feed, between 5 and 19% (8 to 31% of P not taken up by fish) was removed in the annual sludge removal. Between 40 and 57% was released from these ponds, which represented from 3.8 to 6.3 kg of P released per ton of fish produced. Finally, the HRT, the SOR, the fish density (fd ) and the P sorption were the most important factors to improve the efficiency of P removed from aquaculture ponds.;More in-depth studies of these parameters should be carried out and ponds with lower P retention efficiency could increase their sludge removal frequency to at least twice per year.
机译：由于施加的环境限制，魁北克的淡水鱼养殖业的产量减少了。该行业的目标是到2014年在一项名为“魁北克淡水水产养殖发展战略（STRADDAQ）”的协议框架内，将磷（P）排放量减少至每公斤鱼释放4.2 kg磷。在魁北克，91％的养鱼场至少使用一个池塘进行养鱼和养殖，这表明建立池塘养鱼场综合管理系统的重要性。然而，关于磷的动态性尚无足够的数据。本研究的目的是在养鱼场中建立年度磷平衡，并根据每年测得的磷质量来确定养鱼场中磷释放的主要因素。水产养殖污泥的清除。为此，在生产的两年中研究了一个魁北克鱼场。分析的参数为：与水力停留时间，表面溢流负荷和鱼的密度有关的池塘污泥，分布的饲料和所生产的鱼中的磷质量。两个类似的喷浆池（;研究池的污泥的月度特征表明，喷浆池2和土池3的浮式曝气器下累积的污泥中P的含量分别为63％至91％和19％至83％。每年清除污泥的结果表明，与喷射混凝土池塘相比，回收了大约31％的未摄取磷的陶土池塘，回收了大约31％未被鱼类吸收的P的土质池塘似乎具有更高的磷保持效率。但是，从土池底部清除的污泥可能会吸收过去几年的运营中积累的磷，因此磷的去除效率可能被高估了。更长的水力停留时间（HRT） ，较低的表面溢流率（SOR）和较低的鱼类密度（fd）以及土池中较强的P吸附机制有利于污泥中P的高效去除。池塘中的es表明，在每年的污泥清除中，从分布式饲料中添加的100％P中，有5％至19％（鱼类未吸收的P中的8％至31％）被清除。这些池塘释放了40％至57％的磷，相当于每吨鱼类释放3.8至6.3千克磷。最后，HRT，SOR，鱼密度（fd）和P吸附是提高从水产养殖池中去除P效率的最重要因素。;应该对这些参数进行更深入的研究。较低的磷保持效率可能会将其污泥去除频率提高到每年至少两次。

著录项

  • 作者

    Sanchez Barrios, Carlos Gerardo.;

  • 作者单位

    Ecole Polytechnique, Montreal (Canada).;

  • 授予单位 Ecole Polytechnique, Montreal (Canada).;
  • 学科 Engineering Civil.;Agriculture Fisheries and Aquaculture.
  • 学位 M.Sc.A.
  • 年度 2009
  • 页码 130 p.
  • 总页数 130
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;水产、渔业;
  • 关键词

  • 入库时间 2022-08-17 11:38:26

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