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总需氧量 [zǒng xū yǎng liàng]
[环境] total oxygen demand
- 总需氧量能完全反映水中还原性物质的污染程度。
The overall aerobic quantity cam completely reflect the pollution degree of reducing matter in water. - 结果表明，该段水体已受轻度污染，主要污染因子是氨氮、总磷和化学需氧量。由此提出了污染防治的对策措施。
Results showed that the water has been contaminated by the mild, the main pollution factors is cod and ammonia nitrogen and total phosphorus. - 水质达劣Ⅴ类的为莲花洞水库，主要污染物为五日生化需氧量、总磷和总氮。
the water quality of Lianhuadong lake and reservoir is level-5 and the main pollutions are total nitrogen, total phosphorus and five-day's oxygen demand.
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