Metabolic performance of anaerobic digestion of chicken manure under wet, high solid, and dry conditions

Abstract

The anaerobic digestion (AD) of chicken manure as a solo substrate has been challenging due to the ammonium inhibition effects when adopting a high organic loading rate (OLR). In this study, through increasing both the total solid in the feeding materials from 5% to 20%, and the OLR from 1.7 to 7.1 g-volatile solids (VS)/(L•d), the AD of chicken manure under wet, high solid, and dry conditions, with a fixed hydraulic retention time of 20 days, was investigated. The results obtained indicated that the wet AD system could achieve a methane yield of 0.28 L/g-VS and a low volatile fatty acid level. However, the process deteriorated under dry conditions, and methane formed mainly through acetate oxidation and methanogenesis. Methanosarcina and Methanoplasma were found to be more tolerant But, whether the dry AD of chicken manure can survive an ammonia-stressed environment when the OLR is lowered, still needs investigation.

Evaluating the Effectiveness of Adding Chicken Manure in the Anaerobic Mesophilic Codigestion of Sewage Sludge and Wine Distillery Wastewater: Kinetic Modeling and Economic Approach

“…It has been estimated that AD of 150 million tonnes of chicken manure could produce 3 × 10 14 KJ of energy. 12,44 However, AD of CM normally operates in a wet system (the feed has a total solids content of around 6%−10%), which means a large amount of water is therefore required to dilute the raw CM, which has a TS content of at least more than 25% 12 (in the current paper, the TS content of CM was around 80%). Moreover, the financial costs of constructing biogas plants are high, which means that AD of CM is not very competitive 12,13 or even sustainable if it is carried out using clean water.…”

Material Characterization and Substrate Suitability Assessment of Chicken Manure for Dry Batch Anaerobic Digestion Processes

“…[ 30 ] was 74 mL/g VS and lower compared to the findings of this study. Other authors such as Bi et al [ 31 ] or Wang et al [ 32 ] published considerable higher methane yields of 280 mL/g VS and 437 mL/g VS respectively, partly due to ammonia extraction within the process. One possible reason for divergent results in various studies is the differences in physical and chemical composition of the manure, due to the method of rearing as well as the utilisation and kind of bedding material.…”

A Glimpse of the World of Volatile Fatty Acids Production and Application: A review

“…A high concentration of ammonia can affect the methanogenesis process and lower the quantity of methane produced during anaerobic digestion. Many kinds of literature have reported a very high ammonia concentration in wastewater ranging from 1,700 mg/L to 14,000 mg/L [ 249 , 250 ], which excess the nitrogen capacity of the land. Inhibitors in AD processes include organics such as chlorophenols, halogenated aliphatics, N-substituted aromatics, or inorganics such as ammonia, sulfide and light metal ions in nature or a combination thereof [ 149 ].…”