In summer, COD and BOD are the main pollutants, nitrogen and phosphorus pollution happens in winter.
夏季主要以COD、BOD有机污染为主，冬季以氮、磷污染为主。
Marine dead zones form when nitrogen and phosphorus pollution concentrates in near-coast waters through a process called eutrophication.
氮，磷污染通过被称为富营养化的这个过程，在近海岸水域集中泛滥，从而形成海洋死区。
The nitrogen and phosphorus pollution in water and over nourishment of water is also one of the major environmental issues at present.
微生物在农田污染治理和水体富营养化修复中显示出越来越重要的作用。
Excess nitrogen and phosphorus nutrients due to large quantities of feed imports, can lead to problems with manure disposal and pose a potential pollution risk.
大量的饲料进口产生过多的氮磷营养物，将导致粪便处理的问题，并构成潜在的污染风险。
With the increase in discharging of waste water containing large amount of nitrogen and phosphorus to lakes and rivers, fresh-water pollution has been becoming a more and more serious problem.
随着大量含氮和磷的废水流入湖泊和江河，导致淡水污染现象日趋严重。
The results show that nitrogen, phosphorus and organic matter from the urban sewerage and the agricultural non-point source pollution play an important role in Chaohu Lake eutrophication.
结果表明，城镇生活污水和农业面源污染输入的氮、磷以及有机物，对巢湖富营养化起着重要的作用。
The Pollution of nitrogen and phosphorus is the main cause for water ultra-nutrition.
氮，磷污染是导致水体富营养化的主要原因。
Nitrogen and phosphorus removal is important in water pollution control.
城市污水中氮、磷的处理是水污染控制的一个重要问题。
With the discharging of the waste water containing a large amount of nitrogen and phosphorus into the lakes and rivers, the pollution of the fresh water becomes more and more serious.
随着大量含氮和磷的废水流入湖泊和江河，导致淡水污染现象日趋严重。
Nitrogen and Phosphorus are restricted severely to prevent the water eutrophication. Biological nutrient removal (BNR) is an important water pollution control technology.
为遏制水体的富营养化，氮、磷的排放标准日趋严格，生物脱氮除磷工艺能有效地去除水体中的氮、磷。
So far, there is no high-efficiency and low-energy consumption, pollution-free waste water treatment technology with sludge reduction and nitrogen and phosphorus removal.
迄今为止，尚无一种集污泥减量与同时脱氮除磷为一体的高效低能耗、无污染的废水处理技术。
So far, there is no high-efficiency and low-energy consumption, pollution-free waste water treatment technology with sludge reduction and nitrogen and phosphorus removal.
迄今为止，尚无一种集污泥减量与同时脱氮除磷为一体的高效低能耗、无污染的废水处理技术。
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