Quantification of nitrous oxide emissions during biological nitrogen removal from waste water due to nitrifier denitrification - a systems comparison.

有强有力的证据表明，从废水中生物脱氮会排放大量的一氧化二氮（N2 O）气体。高达80%的去除的氮以N2 O的形式排放，这是一种强烈的温室气体和臭氧消耗剂。这一事实在农业废物处理方面得到了充分的报道，但在社区/工业废水处理方面却没有报道。关于农业和商业废水处理的报告之间的这种差异可能是由于这样的事实，即传统上，一氧化二氮的排放被认为是由水处理过程中涉及的不同细菌引起的。因此，商业处理厂的气体排放清单可能遗漏了这种气体的一个潜在重要来源。拟议的研究旨在调查，在实验室的控制条件下，是否处理社区/工业废水的脱氮主要会导致大量的一氧化二氮的释放。将这些结果与农业部门的现有结果进行比较，将确定这两个部门之间N2 O排放潜力是否存在一般差异。研究结果将用于制定进一步研究的战略，分别研究i）工业/公共废水沃茨中N2 O的量化和减排或ii）农业废水处理中N2 O的进一步减少。

There is strong evidence that the biological removal of nitrogen from waste water emits considerable amounts of nitrous oxide (N2O) gas. Up to 80 per cent of removed nitrogen is emitted in the form of N2O, which is a strong greenhouse gas and ozone depletant. This fact is well reported for treatment of agricultural wastes but not for the treatment of communal/industrial waste water. This difference between reports on agricultural and commercial waste water treatment may be due to the fact that, conventionally, the emission of nitrous oxide is seen to be cause by different bacteria involved in the water treatment process. Inventories of gaseous emissions from commercial treatment works thus may have missed out a potentially significant source of this gas. The proposed research aims to investigate, under controlled conditions in a laboratory, whether the treatment of communal/industrial waste water for nitrogen removal can principally lead to significant releases of nitrous oxide. Comparison between these results and those available for the agricultural sector will establish if there are generic differences in N2O emission potential between these two sectors. The results will be used in the formulation of a strategy for further research into i) the quanitification and abatement of N2O from industrial/communal waste waters or ii) further reduction of N2O from agricultural waste water treatment, respectively.