查询词典 biochemical oxygen demand

Some water samples from intakes and outlets of 3 wetland pond beds growing Phragmites communis Trin, Typha angustifolia and Cyperus alternifolius were respectively taken for monitoring and contrasting 5 main water quality indexes including dissolved oxygen, chemical oxygen demand, biochemical oxygen demand in 5 days (BOD5), total nitrogen, and total phosphorus month by month all year around, so as to discover influences of different plant species on water purification efficiency.

摘 要：通过对成都活水公园人工湿地中的3种优势挺水植物所在塘床进出水口的5个主要水质指标：水中溶解氧（dissolved oxygen， DO）、化学需氧量（chemical oxygen demand， CODcr）、5日生化耗氧量（biochemical oxygen demand in 5 days， BOD5）、总氮（total nitrogen， TN）、总磷（total phosphorus， TP）的全年逐月对比监测，探索不同植物种类对污水净化效率的影响，并对湿地中不同植物塘净化效率产生差异的原因作了较全面的分析讨论。

The most common of these measures are biochemical oxygen demand and chemical oxygen demand.

并且氧气被用作有机物的分解同且用作实物。

Two measure oxygen demand directly: Biochemical Oxygen Demand and Chemical Oxygen Demand.

有三种广泛用到的测需氧量的方法，两种直接法：生化需氧量和化学需氧量

Biochemical Oxygen Demand is an important control index in wastewater effluent ,but it takes longer time(5 days)for its determination,while the time for measuring the Chemical Oxygen Demand is shorter(10 hours).

生化耗氧量是废水排放的重要控制指标，但它的测定需要时间较长，而化学耗氧量的测定时间较短，这两者是否存在稳定的关系？

Generally aerobic and anaerobic wastewater treatment plants require substantial areas of land for the effective treatment of liquid waste streams to achieve very low levels of Biochemical Oxygen Demand and Chemical Oxygen Demand reduction.

通常，好氧和厌氧的废水处理设备需要大量土地以进行有效的废液处理，把生化需氧量和化学需氧量减少到非常低的程度。

Biochemical oxygen demand over five days - BOD5: The standard biochemical oxygen demand test whereby a sample of the liquid is incubated at 20 degrees C for five days.

五天生化需氧量(简写为BOD5)：标准的生化需氧量试验。其方法是把一份溶液的样品在摄氏20度下培养五天。

Biochemical oxygen demand is one of the most important parameters characterizing the organic pollution of wastewater and widely used in the fields of water quality monitoring and the evaluation of the wastewater treatment efficiency.

生化需氧量（biochemical oxygen demand，BOD）作为表征水体中种类繁多的有机污染物的集合参数，在水质评价、污染监测以及废水处理厂的运行分析等方面发挥着重要作用。

The results showed that the IVCW effectively removed total suspended solids(85%),chemical oxygen demand(50%),five-day biochemical oxygen demand(44%),total ammonia(53%),nitrite(83%) and nitrate(54%) from the aquaculture wastewater at a hydraulic loading rate of 420mm/d.

结果表明，在420 mm/d的水力负荷下，湿地可有效地去除循环水中的总悬浮物(去除率85%)、CODCr(去除率50%)、BOD5(去除率44%)、总氨氮(去除率53%)、亚硝酸盐(去除率83%)和硝酸盐(去除率54%)，能够满足养殖用水的要求，整个试验期间系统实现了零污水排放。

The results showed that the IVCW effectively removed total suspended solids (85%), chemical oxygen demand (50%), 5-day biochemical oxygen demand (44%), total ammonia (53%), nitrite (83%) and nitrate (54%) from the aquaculture wastewater at a hydraulic loading rate of 420mm/d.

结果表明，在420mm/d的水力负荷下，湿地可有效地去除循环水中的总悬浮物(去除率85%)、CODCr(去除率50%)、BOD5(去除率44%)、总氨氮(去除率53%)、亚硝酸盐(去除率83%)和硝酸盐(去除率54%)，能够满足养殖用水的要求，整个试验期间系统实现了零污水排放。

Biochemical oxygen demand over five days -BOD5; five day biochemical oxygen demand The standard biochemical oxygen demand test whereby a sample of the liquid is incubated at 20 degrees C for five days.

生化物五天需氧量（简写为BOD5）标准的生化需氧量试验。其方法是把一份溶液的样品在摄氏20度下培养五天。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。