A critical review on inhibition of anaerobic digestion process by excess ammonia

Rajagopal, Rajinikanth; Massé, Daniel I.; Singh, Gursharan

doi:10.1016/j.biortech.2013.06.030

Cited by 1,061 publications

(561 citation statements)

References 69 publications

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“…One form of dilution is co-digestion with a low nitrogen co-substrate to achieve a favourable C/N ratio and ensure that TAN and free ammonia nitrogen (FAN) remain below the threshold inhibitory concentrations. For animal manures this can be achieved by mixing with agricultural crops, as suggested by a number of researchers; this may also have the benefit of improving the volumetric methane production of the digester and thus its economic performance (Rajagopal et al, 2013). The co-digestion of cattle slurry with up to 50% fruit and vegetable wastes can provide a good methane yield (Callaghan et al, 2002) and an increase in methane production of 93% has been reported for chicken manure compared to its mono-digestion (Abouelenien et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Because of the high nitrogen and solids content, co-digestion of CM and MS in their original undiluted form may be technically challenging (Rajagopal et al, 2013). Dilution with water, however, involves the additional costs of the water required and the subsequent treatment of substantial amounts of effluent (Nie et al, 2015;Niu et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biogas production from undiluted chicken manure and maize silage: A study of ammonia inhibition in high solids anaerobic digestion

Sun

Cao

Banks

et al. 2016

Bioresource Technology

156

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The feasibility of co-digestion of chicken manure (CM) and maize silage (MS) without water dilution was investigated in 5-L digesters. Specific methane production (SMP) of 0.309 L CH 4 g -1 volatile solids (VS) was achieved but only at lower %CM. Above a critical threshold for total ammonia nitrogen (TAN), estimated at 7 g N L -1 , VFA accumulated with a characteristic increase in acetic acid followed by its reduction and an increase in propionic Methanogenesis was completely inhibited at TAN of 9 g N L -1 . The low digestibility of the mixed feedstock led to a rise in digestate TS and a reduction in SMP over the 297-day experimental period. Methanogenesis appeared to be failing in one digester but was recovered by reducing the %CM. Co-digestion was feasible with CM ≤20% of feedstock VS, and the main limiting factor was ammonia inhibition.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biogas production from undiluted chicken manure and maize silage: A study of ammonia inhibition in high solids anaerobic digestion

Sun

Cao

Banks

et al. 2016

Bioresource Technology

156

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“…AD is an effective biochemical process for organic waste treatment and for biogas production because AD offers numerous significant advantages, such as low sludge production, low energy requirement, and green energy recovery. It has been evaluated as one of the most energy-efficient and environmentally beneficial technologies for bioenergy production [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Using Chemically Enhanced Primary Treatment (CEPT) as a Pretreatment Option for Anaerobic Digestate from Cattle Manure Digestion System

Gong

Luo

et al. 2017

Water

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Anaerobic digestate from cattle manure fermentation may pose a threat to the environment. How to stabilize the digestate's characteristics so that they do not disturb the bio-system is a critical issue for digestate management. Chemically enhanced primary treatment (CEPT) was investigated as a pretreatment option for digestate treatment. The performance of CEPT for digestate management was carried out under rapid mixing (200 r/min) and slow stirring (40 r/min), respectively. The optimal dosage of ferric chloride (FeCl 3 ) was 40 mg/L. The combination of FeCl 3 and anionic polyacrylamide (APAM) had no obvious influence on TP removal, while COD removal efficiency was improved by 15.4%. The digestate pH and temperature remained stable for CEPT application and required no adjustment. The results indicate that CEPT was effective and feasible in enhancing the removal of COD and TP for digestate pretreatment by using FeCl 3 and APAM.

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“…In Experiment 2, ammonia concentration was similar in all the tests, with 0.31 ± 0.02 gN-NH 3 /l as average value. Due to the proteinrich composition of fleshing, ammonia inhibition is reported by many authors as possible drawback of anaerobically treating such a waste (Chen et al, 2008;Kovács et al, 2013;Rajagopal et al, 2013). Nevertheless, this was not the case in our experiments due to the relatively low concentration of substrate that never lead to inhibitory condition from ammonia.…”

Section: Batch Testsmentioning

confidence: 63%

Modeling the Disintegration Process in Anaerobic Digestion of Tannery Sludge and Fleshing

Polizzi

Alatriste‐Mondragón

Munz

2017

Front. Environ. Sci.

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Mathematical modeling of anaerobic digestion (AD) is widely acknowledged as a powerful tool to v of the process and to support full-scale plant design, operation and optimization. In this work, a modified version of the IWA-ADM1 model is proposed to simulate the AD of tannery primary sludge (TPS) and fleshing, with special emphasis on the disintegration formulation. Multiple batch tests were performed at different inoculum/substrate VS-mass ratio, in order to evaluate the biodegradability of the two substrates and to provide experimental data for modeling purposes. Beside the necessary adjustments of substrates' COD fractionation, the structure modifications of the model focused on the disintegration and hydrolysis. The Contois Monod-based model was adopted to describe disintegration kinetics and the results were compared to the traditionally adopted first-order kinetic. The fate of particulate matter generated from biomass lysis was also questioned and a new model variable was introduced to account for cellular lysis products. Finally, a further modification differentiated substrate particulate matter into a readily and a slowly hydrolysable fraction. Batch tests confirmed that TPS and fleshing are suitable substrates for AD, exhibiting specific methane productions of: 0.26 ± 0.06 and 0.47 ± 0.05 Nm 3 Kg −1 VS, respectively. Modeling results showed that the proposed modifications were crucial for successful simulation of experimental data referring to fleshing, whereas did not have a significant effect on the results related to primary sludge degradation. This work is the first application of an IWA-ADM1-based model to AD of tannery waste.Keywords: anaerobic digestion, tannery waste, modeling, ADM1, hydrolysis INTRODUCTIONLeather industry comprises a chain of processes required to transform raw animal hides into the finished product. A large amount of tannery wastewater and of solid waste is generated throughout the process, especially in the highly water-demanding pre-tanning phases. Dedicated wastewater treatment plants are often conceived to treat tannery pollutant load, characterized by high concentrations of organic matter (including recalcitrant compounds), ammoniacal nitrogen, sulfide and salts (Mannucci et al., 2010). Tannery fleshing (TF) represents the main solid waste; it originates from the removal of animal tissue from the raw hide, usually after liming process (de-haring phase). Tannery primary sludge (TPS) and TF has been traditionally disposed in landfill or incinerated. In the last decades, new stringent regulations and environmental policies Polizzi et al. Modeling Anaerobic Digestion of Tannery Wastehave been encouraging alternative eco-friendly treatments, worldwide. Among them, anaerobic digestion (AD) has been acknowledged as a valuable solution for the treatment of a wide variety of organic waste, whose multiple advantages range from waste volume reduction to renewable energy production and cost-effective management. AD of tannery-originated wastes found its first applications in the late...

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A critical review on inhibition of anaerobic digestion process by excess ammonia

Cited by 1,061 publications

References 69 publications

Biogas production from undiluted chicken manure and maize silage: A study of ammonia inhibition in high solids anaerobic digestion

Biogas production from undiluted chicken manure and maize silage: A study of ammonia inhibition in high solids anaerobic digestion

Using Chemically Enhanced Primary Treatment (CEPT) as a Pretreatment Option for Anaerobic Digestate from Cattle Manure Digestion System

Modeling the Disintegration Process in Anaerobic Digestion of Tannery Sludge and Fleshing

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