title: Methane emissions from a full-scale A/A/O wastewater treatment plant.
abstract: Methane (CH(4)) 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 CH(4) performed the following descending order: anaerobic tanks, oxic tanks, aerated grit chambers and sludge concentration tanks. The total annual fluxes of CH(4) emissions from the Jinan WWTP were 1.69 × 10(4)kg yr(-1), with the emission factors of per capita emissions of 11.3g CH(4) person(-1)yr(-1) and flow-based emissions of 1.55 × 10(-4)g CH(4) (L of wastewater)(-1). The estimated source strength of methane for all WWTPs in China was 6.2 Gg yr(-1) (1 Gg=10(9)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.
authors.affiliation: Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, 27 Shanda Nanlu, Jinan 250100, PR China.
authors.forename: Jinhe
authors.initials: J
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Huijun
authors.initials: H
authors.lastname: Xie
authors.forename: Pengyu
authors.initials: P
authors.lastname: Qi
authors.forename: Yangang
authors.initials: Y
authors.lastname: Ren
authors.forename: Zhen
authors.initials: Z
authors.lastname: Hu
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D002681:China; D005374:Filtration; D006863:Hydrogen-Ion Concentration; D008697:Methane / Q000032:analysis*; D009566:Nitrates / Q000032:analysis; D009573:Nitrites / Q000032:analysis; D010100:Oxygen / Q000032:analysis; D012722:Sewage / Q000737:chemistry; D013696:Temperature; D014835:Volatilization; D014865:Waste Disposal, Fluid; D018508:Water Purification / Q000379:methods*
chemical_list: D009566:Nitrates; D009573:Nitrites; D012722:Sewage; D008697:Methane; D010100:Oxygen