Methane emissions from a full-scale A/A/O wastewater treatment plant

详细信息    查看全文

• 作者：Jinhe Wang^a ; ^b ; Jian Zhang^a ; ^{zhangjian00@sdu.edu.cn} ; Huijun Xie^c ; Pengyu Qi^a ; Yangang Ren^a ; Zhen Hu^a
• 关键词：Greenhouse gas ; Methane emission ; Anaerobic/anoxic/oxic ; Wastewater treatment plant
• 刊名：Bioresource Technology
• 出版年：2011
• 出版时间：May 2011
• 年：2011
• 卷：102
• 期：9
• 页码：5479-5485
• 全文大小：478 K

文摘

Methane (CH₄) emissions from a full-scale anaerobic/anoxic/oxic (A/A/O) wastewater treatment plant (WWTP) (Jinan, China) were investigated during spring and summer of 2010. Results showed that the major emission sources of CH₄ performed the following descending order: anaerobic tanks, oxic tanks, aerated grit chambers and sludge concentration tanks. The total annual fluxes of CH₄ emissions from the Jinan WWTP were 1.69 × 10⁴ kg yr⁻¹, with the emission factors of per capita emissions of 11.3 g CH₄ person⁻¹ yr⁻¹ and flow-based emissions of 1.55 × 10⁻⁴ g CH₄ (L of wastewater)⁻¹. The estimated source strength of methane for all WWTPs in China was 6.2 Gg yr⁻¹ (1 Gg = 10⁹ g). The most significant factors influencing methane emissions were dissolved oxygen concentration in aerated grit chamber and oxic tank and water temperature in high density settler tanks.