Treatment of nutrient-rich wastewater potentially results in direct release of greenhouse gases (GHGs) such as CO₂, N₂O or CH₄ – and thus affects Waste Water Treatment Plant's carbon footprint. Accurate CO₂ quantification is challenging due to various chemical, physical and operational conditions. A floating chamber equipped with a nondispersive infrared, single beam, dual wavelength sensor has been evaluated for a pilot approach to quantify fugitive CO₂ emissions above different wastewater treatment units. Total average CO₂ flux was 1182 g CO₂·m⁻²·d⁻¹ with minimum and maximum fluxes of 829 g CO₂·m⁻²·d⁻¹ and 1493 g CO₂·m⁻²·d⁻¹, respectively. Total observed CO₂ emissions were in 7 to 17 kg CO₂·PE⁻¹·a⁻¹ (average 12 kg CO₂·PE⁻¹·a⁻¹). The nitrification tank accounted for about 94.3% of the emissions, followed by secondary clarification (ca. 4.3%) and denitrification (ca. 1.4%), based on those average annual CO₂ emissions per population equivalent (PE).

处理富含营养的废水可能会导致直接释放温室气体（GHG），例如CO ₂，N ₂ O或CH ₄，从而影响废水处理厂的碳足迹。由于各种化学，物理和操作条件，精确的CO ₂定量分析具有挑战性。已对配备有非分散红外，单光束，双波长传感器的浮舱进行了试验性评估，以量化不同废水处理单元上方的逃逸性CO ₂排放量。总平均CO ₂通量为1182 g CO ₂ ·m ^-2 ·d ^-1，最小和最大通量为829 g CO₂ ·m ^-2 ·d ^-1和1493 g CO ₂ ·m ^-2 ·d ^-1。观测到的CO ₂排放总量为7至17 kg CO ₂ ·PE ^-1 ·a ^-1（平均12 kg CO ₂ ·PE ^-1 ·a ^-1）。根据每人口当量（PE）的年平均CO ₂排放量，硝化池约占排放量的94.3％，其次是二次澄清（约4.3％）和反硝化（约1.4％）。