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贝藻处理工厂化养殖废水的研究 总被引:8,自引:1,他引:8
研究了常见大型藻类对氮、磷营养盐的去除效果和贝类对悬浮颗粒物的去除效果。结果表明,石莼和海带在同样的实验条件下吸附氮、磷营养盐的效果明显高于鼠尾藻和马尾藻,密度2g/L的石莼和7.52g/L的海带是较好的养殖密度。与扇贝和文蛤比较,牡蛎具有较高的去除悬浮颗粒物的效率,可以在24h内除去养殖废水中93%的悬浮颗粒物。在20L养殖废水中投放1000g牡蛎和40g石莼组成的净化养殖废水的生物滤器对营养盐和悬浮颗粒物具有最好的去除效果,其去除效率分别为PO4P67.8%、NO2N60.2%、NH4N55.8%、NO3N59.0%和SPM82.5%。在20L养殖废水中投放1000g牡蛎和150g海带组成的生物滤器对营养盐和悬浮颗粒物的去除效果较好,其去除效率分别为PO4P62.6%,NO2N55.7%,NH4N46.0%,NO3N56.6%和SPM84.5%。 相似文献
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广东省海水养殖贝藻类碳汇潜力评估 总被引:8,自引:0,他引:8
大型藻类和滤食性贝类可以直接或者间接吸收水体中的碳(C),收获养殖产品形成了一个"可移出的碳汇",提高了海域的碳汇潜力。文章从物质量评估和价值量评估两方面对广东省贝、藻养殖的碳汇贡献进行了定量评估。物质量评估结果显示,2009年广东省海水养殖的贝类和藻类收获可以从海水中移出C约11×104t,相当于39.6×104t二氧化碳(CO2);价值量评估结果显示封存固定这些CO2所需要的费用约0.59×108~2.38×108美元。因此,基于贝、藻养殖的碳汇渔业具有巨大的经济效益、生态效益和社会效益。 相似文献
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综合生物塘处理养殖废水初探 总被引:4,自引:0,他引:4
2003年8~9月进行综合生物塘处理养殖废水试验。综合生物塘面积34m^2,水深76cm,种植眼子菜、灯心草、金鱼藻等5种水生植物,放养无齿蚌、圆田螺和细鳞斜领鲴。试验分生物措施处理(试验Ⅰ)、生物措施加微生物净水剂处理(试验Ⅱ)两部分。经过15d的试验,试验工的电导率、NH3-N、NO3-N、COD、总硬度、总磷分别下降了31.9%、70.5%、47.2%、53.0%、33.2%、47.4%;试验Ⅱ的相同指标分别下降了34.5%、47.0%、82.8%、86.7%、30.9%、45.5%。 相似文献
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为保护海域环境质量,减轻养殖产业的自身污染,在浙江省东海塘水产养殖基地的设计中,为505.1 hm2的海水养殖池塘配置了80.0 hm2的潮汐式人工湿地生物净化池和13.3 hm2的河道式颗粒物降解系统。模型试验表明,海水人工湿地净化的工艺流程基本合理,净化系统运行平稳,经过跌水曝气—微生物膜降解—沙蚕摄食—缢蛏、牡蛎滤食—江蓠、紫菜、龙须菜的组合吸收等过程,养殖废水的COD、PO43--P、TAN、TSS等4项主要污染指标的平均降解率分别为70.45%、65.98%、71.10%、91.37%,取得了较显著的效果,实现了海水养殖废水的净化、减排的目的。 相似文献
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为了解江苏省海水养殖贝藻类的碳汇能力,根据2010—2020年江苏省海水养殖贝藻类的产量,从物质量和价值量2方面对其碳汇量进行定量评估,并与沿海省份进行对比,分析差异原因。结果显示,江苏省年平均海水养殖贝藻类产量约为70.62万t,年平均碳汇量约为6.38万t,固定二氧化碳(CO2)约为23.41万t,节约经济价值约0.35×108~1.41×108美元。指出,江苏省海水养殖贝藻类的产量和碳汇量在沿海省份中排名靠后,可以创造一定的经济和环境效益,但与一些海水养殖大省还有比较大的差距。 相似文献
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池塘养殖是我国海水养殖的传统方式,也是当前陆基海水养殖的主体。自20世纪70年代,海水池塘养殖经历了粗放式、半集约、集约化和多营养层次生态养殖的发展历程。然而,海水池塘养殖产业中仍存在养殖生物生态适应性机制不清、养殖系统产出不稳定、营养物质利用效率低等“瓶颈”问题,严重制约了海水池塘养殖产业的发展。因此开展海水养殖虾蟹良种与生态环境的互作机制解析,研发养殖生态系统结构优化和营养物质资源化高效利用技术,搭建养殖信息采集与智能化管控平台,创建生态工程化养殖新模式,实现养殖系统高效可持续产出,是我国海水池塘养殖产业绿色高质量发展的关键。 相似文献
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In coastal countries, marine shrimp industry poses a problem with respect to the waste effluent disposal into the ocean as well as the nearby area. Constructed microbial mats offer an interesting alternative for shrimp culture effluents. The treatment concept relies on the immobilization of natural marine microbial consortium on glass wool to mitigate the levels of dissolved nitrogen from a shrimp culture effluent. Our results indicate that average efficiencies of ammonia nitrogen removal from shrimp (Litopenaeus vannamei) effluent was 97% and 95% for nitrate nitrogen, over a 20 days period of treatment. This treatment via constructed microbial mats is a technically feasible method for simultaneously reducing effluent nutrient loading (especially nitrate and ammonia) and for reducing organic loading (especially BOD5) of shrimp culture effluents. 相似文献
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Secondary sewage effluent has been used as a nutrient source for the outdoor mass culture of marine phytoplankton that serve as food for bivalve molluscs in a combined tertiary sewage treatment-aquaculture system. Using a daily harvest rate of 50%, yield in algae ranged from one to five grams carbon/m2/day and averaged 2.6 over the four-month experimental period. 相似文献
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D.E. Brune 《Aquacultural Engineering》1982,1(1):63-70
An automatic self-cleansing high density brine shrimp reactor has been designed and tested, and the concept appears successful. Initial experiments suggest that extra-ordinarily high densities of brine shrimp may be maintained in such a system. The concept of a flowing film of glass beads appears to be a very useful technique in scouring waste material from animal culture tanks. The concept is particularly useful for culture of small marine herbivores in continuous culture. The bead flow rapidly removes waste material while allowing for water passage, yet completely containing the animals.Further design improvement and development should result in a high density brine shrimp culture system which is both simple and inexpensive to build, as well as reliable and cost effective to operate, and capable of efficient algal cell removal from culture water. 相似文献
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《Aquaculture (Amsterdam, Netherlands)》1986,53(2):133-143
The suitability of chlorinated secondary domestic sewage effluent as a fertilizer for culturing tilapia in seawater ponds was investigated. The only food source was the increased in situ algal production and the associated fauna and flora that were derived from the added sewage nutrients. The effluent quality was monitored, i.e., pH, NH4N, NO3N, ortho-P, chemical oxygen demand, suspended solids and residual chlorine. Each monitored parameter and its possible effect on the culture system is discussed.The added effluent was found to provide a suitable and inexpensive fertilizer source with projected fish yields of between 3.9 and 8.1 t ha−1 per growth season of 210–226 days, depending on conditions. 相似文献
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对虾养殖过程中的水质控制 总被引:5,自引:0,他引:5
一、水质因子对养虾的影响及对虾养殖对水质的要求在水产养殖的过程中,通常用溶解氧、pH值、氨氮、硫化氢、盐度、水色、水的味道和透明度来表示水质化学指标和物理性状。溶解氧不仅是保证对虾正常生理功能和健康生长的必需物质,又是改良水质和底质的必需物质,在对虾养殖的全过程中均应保证有充足的溶解氧,最好能保持在5mg/L以上。养殖南美白对虾底层水一般不应低于3.5mg/L,当溶解氧降到1mg/L时,南美白对虾便有浮头死亡的危险;养殖中国对虾底层水一般在短时间内不得低于4mg/L。池塘底质和水中浮游生物也需要消耗大量的溶… 相似文献