Algae, bacteria, and zooplankton were counted in samples drawn from 120- and 150-m2 high-rate algae ponds (those used for wastewater treatment). The fraction of nondegraded organic matter was estimated by comparing the ratio of biological and chemical oxygen demands and the bacterial, algal, and zooplankton counts to volatile suspended solids. With pond effluent quality at an acceptable level (around 18 mg of dissolved biological oxygen demand), the algae/bacteria ratio was around 1:100 or even higher, the zooplankton count was negligible, and the bacterial concentration was approximately 1011 cells per liter by direct count. The data for bacteria exceeded those of earlier studies by one to three orders of magnitude.
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机译：从120和150 m 2 高速率藻类池塘（用于废水处理的池塘）抽取的样本中对藻类，细菌和浮游动物进行了计数。通过比较生物需氧量和化学需氧量与细菌，藻类和浮游动物计数与挥发性悬浮固体的比率，可以估算出未降解有机物的比例。如果池塘的出水水质处于可接受的水平（大约18 mg溶解的生物需氧量），藻类/细菌的比率约为1：100甚至更高，浮游动物的数量可以忽略不计，细菌的浓度约为10 11 每升直接计数的细胞。细菌数据超出了早期研究的数据一个到三个数量级。
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