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N2O generation and emission from two biological nitrogen removal plants in China

机译：中国两家生物脱氮厂的N2O产生和排放

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摘要

Nitrous oxide (N2O) generation and emission from No. 3 wastewater treatment plant (WWTP) in Xi'an (Orbal oxidation ditch) and No. 4 WWTP in Xi'an (reversed A/A/O) were measured throughout a year following the water environment research foundation protocol. The N2O generation and emission rates of No. 4 WWTP (generation rate of 14.43kg (N2O)/d and emission rate of 13.78kg (N2O)/d) were about twice that of No. 3 WWTP (generation rate of 7.09kg (N2O)/d and emission rate of 6.52kg (N2O)/d). The N2O emission factor of No. 4 WWTP (54.64mg (N2O)/m(3) INF) was about 1.7 times that of No. 3 WWTP (36.20mg (N2O)/m(3) INF). The ammonia oxidation rate, nitrite oxidation rate, and nitrous oxide generation rate were also measured. Results showed that the key factors of N2O generation and emission were the microbial population and aeration strategy.
机译：在接下来的一年中，对西安市第三污水处理厂（Orbal氧化沟）和西安市第四污水处理厂（反向A / A / O）中一氧化二氮（N2O）的产生和排放进行了测量。水环境研究基金会协议。 4号污水处理厂的N2O产生和排放率（14.43kg（N2O）/ d的产生率和13.78kg（N2O）/ d的排放率）是3号污水处理厂的7.02kg（ N2O）/ d和排放速率6.52kg（N2O）/ d）。第4污水处理厂的N2O排放因子（54.64mg（N2O）/ m（3）INF）约为第3污水处理厂（36.20mg（N2O）/ m（3）INF）的1.7倍。还测量了氨氧化速率，亚硝酸盐氧化速率和一氧化二氮生成速率。结果表明，N2O产生和排放的关键因素是微生物数量和通气策略。

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