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本文测定了生活污水中各种形态营养物的含量及各种形态间的分配比;模拟测定了污水-海水混合过程中各营养物形态之间的转化和迁移及其生物学效应,并与现场实际调查结果进行了比较,结果表明:(1)亚热带河口港湾和浮游植物在水体DIN/DIP比值较宽(15-55原子比)范围内可很好地生长,不受N、P含量波动的影响,(2)磷的各种形态之间转化速率在0.5-1.1μmol/d之间变动,(3)浮游植物生长期间优先吸收磷,其生长速率骨条藻(主要种)和混合藻分别为0.34—0.58d~(-1)和0.30—0.31d~(-1),(4)当骨条藻大量繁殖、磷大量消耗时,赤潮生物海洋原甲藻可转化为优势种,其密率高达10~7cells/l,总之,富营养化是赤潮的前提,但混浊水体可加速营养物质的降解、迁移和沉降,有利于富营养化和赤潮的缓解和减弱。
In this paper, the content of various forms of nutrients and the distribution ratio of various forms in domestic sewage were measured. The conversion and migration of various nutrient forms and their biological effects during the sewage-seawater mixing process were simulated and compared with the on-site The results of the survey show that: (1) Subtropical estuarine estuarine and phytoplankton can grow well in the range of DIN / DIP ratio of water (15-55 atomic ratio) without fluctuation of N and P contents (2) the rate of transformation between various forms of phosphorus varied from 0.5 to 1.1 μmol / d, (3) the preferential uptake of phosphorus during phytoplankton growth and the growth rate of Skeletonema albus (major species) and mixed algae 0.34-0.58d -1 and 0.30-0.31d -1, respectively. (4) When Skeletophycean algae multiply and phosphorus is consumed in a large amount, Prorocentrum donghaiense can be transformed into dominant species and its density In general, eutrophication is the premise of red tide, but turbid water can accelerate the degradation, migration and sedimentation of nutrients, which is good for eutrophication and red tide eradication and attenuation.