Tackling ammonia inhibition for efficient biogas production from chicken manure: Status and technical trends in Europe and China. (December 2018)

• Record Type: Journal Article
• Authors: Fuchs, Werner; Wang, Xuemei; Gabauer, Wolfgang; Ortner, Markus; Li, Zifu
• Is Part Of: Renewable & sustainable energy reviews. Volume 97(2018)
• Page Start: 186
• Page End: 199
• Publication Date: 2018-12
• Subjects: AD Anaerobic digestion -- Anammox Anaerobic ammonium oxidation -- BMP Bio-methane potential -- CHP Combined heat and power plant -- CSTR Continuous stirred-tank reactor -- DQY Deqingyuan (location of large chicken farm in China) -- MWel Installed electrical capacity in megawatts -- MWh Megawatt hours (amount of electric energy over a period of time) -- NH3 (Free) Ammonia -- NH4+ Ammonium ion -- OLR Organic loading rate -- TAN Total ammoniacal nitrogen -- TN Total nitrogen -- TKN Total kjeldahl nitrogen -- TS Total solids -- UASB Up-flow anaerobic sludge blanket (reactor) -- VFAs Volatile fatty acid(s) -- VS Volatile solids; Chicken manure -- Biogas -- Anaerobic digestion -- Ammonia removal -- Full-scale application; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.rser.2018.08.038
• Languages: English
• ISSNs: 1364-0321

Abstract

Abstract: The increased global consumption of chicken products has resulted in the generation of huge amounts of manure. Numerous studies emphasized the large potential of this waste as an untapped source of renewable energy through anaerobic digestion (AD). However, intrinsic difficulties, in particular the high N content, induce instable process conditions, including the accumulation of intermediates, and foaming, which reduces methane yields. Such issues limit the widespread application of this energy-rich substrate for biogas production. The process inhibition by ammonia is usually prevented by reducing the concentration of chicken manure through dilution or by operating the plant considerably below its theoretical reactor capacity. However, this process compromises process efficiency, thereby increasing capital investments and operational costs. Another option to achieve optimal process performance is co-digestion with less N-rich materials. However, co-digestion also has its limitations due to the frequent unavailability of sufficient amounts of C-rich substrates. A series of promising technical solutions have been developed to overcome the aforementioned bottlenecks. Examples include stripping or membrane extraction as means to reduce ammonia concentration in the fermenter. Several full-scale plants employing ammonia removal techniques have been installed recently. Latest research also investigated the use of additives, such as zeolites and trace elements, as well as bioaugmentation, to mitigate ammonia inhibition. The current study reviews the state of technology as well as recent achievements and perspectives. It provides an overview of the different approaches to remove ammonia from AD-process and presents practical examples from China and Europe. Graphical abstract: Highlights: High N content chicken wastes induce instable digestion process conditions. Current common approaches reduce the process efficiency or increase the costs. Co-digestion could be an option with limitation of plenty amounts C-rich substrates. Novel technologies such as stripping and membrane extraction are introduced. Some typical practical examples from China and Europe are presented.