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首页> 外文会议>International Conference on Science and Technology >The Utilization of Aquacultures Wastewater as Nutrient Sources in Nannochloropsis oculata Cultivation to Prevent Waters Contamination in Coastal Area
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The Utilization of Aquacultures Wastewater as Nutrient Sources in Nannochloropsis oculata Cultivation to Prevent Waters Contamination in Coastal Area

机译：水产养殖废水的利用作为Nannchlopsis oculata培养的营养来源，以防止水域在沿海地区污染

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Aquaculture activity on coastal area produces organic and inorganic waste that cause a high concentration of dissolved nutrient in waters. Therefore, the organic and inorganic waste should be reduced to prevent a negative impact to coastal water. One way to reduce the aquaculture waste loading to coastal water is to use it as a fertilizer on microalgae cultivation. The objective of this study was to investigate the change of dissolved nitrogen concentration in aquaculture waste during 14 days treatment in aerated and unaerated conditions. Two liters of wastewater was collected every 2 days from the reactor for culture media of microalgae Nannochloropsis oculata in 2 liters Erlenmeyer flask. The concentration of ammonia, nitrite, nitrate and phosphate were determined spectrophotometrically as well as chlorophyll-a content when waste were treated in aerated and unaerated reactor. Water temperature, dissolved oxygen, hydrogen ion and salinity were monitored throughout the treatment. Concentration of ammonia, nitrate and nitrite in aeration treatment were changed faster in aerated condition compared to unaerated condition. The phosphate concentration in both aerated and unaerated had a same pattern and these could reach the highest concentration to 0,9 mg L~(-1). Six days cultivation of N. oculata showed that N. oculata was able to assimilate nutrient from wastewater to construct its cell structure with the highest density of 19,75 × 10~6 cell mL~(-1) and its process caused extremely low nutrient concentration. This result showed that nutrient from aquaculture waste can be almost totally assimilated by N. oculata and create an extremely low concentration of nutrient from wastewater.
机译：沿海地区的水产养殖活动产生有机和无机废物，导致水中高浓度的溶解营养。因此，应减少有机和无机废物以防止对沿海水的负面影响。减少水产养殖废物加载到沿海水的一种方法是将其用作微藻培养的肥料。本研究的目的是在充气和未出现条件下探讨水产养殖废物中溶解的氮浓度的变化。从2升Erlenmeyer瓶中的微藻Nannochloropsis oculata的培养培养基反应器中每2天收集两升废水。在空气化和未曝光的反应器中处理废物和未曝光的反应器时，测定氨，亚硝酸盐，硝酸盐和磷酸盐的浓度，以及叶绿素 - 含量的含量。在整个处理中监测水温，溶解氧，氢离子和盐度。与未出现的条件相比，在曝气条件下，氨氮浓度，硝酸盐和亚硝酸盐在曝气条件下变得更快地改变。空气化和未曝光的磷酸盐浓度具有相同的图案，并且这些可以达到最高浓度至0.9mg L〜（-1）。六天肌肉培养N. Oculata表明N. Oculata能够吸收废水中的营养物，以构建其最高密度为19,75×10〜6个细胞ml〜（-1）的细胞结构，其过程引起极低的营养专注。该结果表明，来自水产养殖废物的营养素几乎完全通过N.Oculata共体现，并从废水中产生极低的营养素浓度。

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