Enhancement of microbial density and methane production in advanced anaerobic digestion of secondary sewage sludge by continuous removal of ammonia

Tao, Bing; Donnelly, Joanne; Oliveira, Ivo Miguel Delgado Bandeira; Anthony, Ruth; Wilson, Victoria; Esteves, Sandra

doi:10.1016/j.biortech.2017.02.066

Cited by 57 publications

(20 citation statements)

References 32 publications

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“…Moreover, the addition of 2–4 g/dm 3 of zeolite in the batch anaerobic digestion of swine manure increased methane yield by 80–100% [ 14 ]. In another paper, Tao et al [ 5 ] demonstrated that CH 4 yields were improved by 54% during the anaerobic digestion of sewage sludge with zeolites. According to Kougias and colleagues [ 45 ], zeolite at doses of 10 g/dm 3 in batch treatments increased methane production during the mesophilic anaerobic decomposition of raw poultry manure by up to 110%.…”

Section: Resultsmentioning

confidence: 99%

“…The sorbents are porous materials characterized by their ability to: (i) lose and gain water reversibly, (ii) adsorb molecules with an appropriate cross-sectional diameter, and (iii) exchange their constituent cations without a major change in their structure [ 4 ]. Mineral sorbents’ porous structure and their ability to exchange constituent cations allow for the reduction of toxicity in the environment (e.g., the reduction of ammonia and ammonium ion concentrations in the solution) [ 5 ], supplementation (e.g., Ca 2+ and Mg 2+ ions released from zeolite) [ 6 ], and immobilization of microbial cells (e.g., high capacity for colonization of microorganisms on their surface) [ 7 ]. The most commonly described mineral sorbents used to enhance the anaerobic digestion process are zeolites [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…There are about 50 different types of zeolite with various mineralogical compositions depending on their structure and Si/Al ratio [ 9 , 10 ]. The properties of zeolites are useful in improving the anaerobic digestion process of feedstock with high concentrations of nitrogen compounds, such as cattle, pig and chicken wastes, food wastes, slaughterhouse wastes, or sewage sludge as they prevent process inhibition [ 5 , 11 , 12 , 13 ]. Firstly, zeolites are used as an ion exchanger for ammonia removal in anaerobic digestion.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Clinoptilolite and Halloysite Addition on Biogas Production and Microbial Community Structure during Anaerobic Digestion

et al. 2020

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The study presents a comparison of the influence of a clinoptilolite-rich rock—zeolite (commonly used for improving anaerobic digestion processes)—and a highly porous clay mineral, halloysite (mainly used for gas purification), on the biogas production process. Batch experiments showed that the addition of each mineral increased the efficiency of mesophilic anaerobic digestion of both sewage sludge and maize silage. However, halloysite generated 15% higher biogas production during maize silage transformation. Halloysite also contributed to a much higher reduction of chemical oxygen demand for both substrates (by ~8% for maize silage and ~14% for sewage sludge) and a higher reduction of volatile solids and total ammonia for maize silage (by ~8% and ~4%, respectively). Metagenomic analysis of the microbial community structure showed that the addition of both mineral sorbents influenced the presence of key members of archaea and bacteria occurring in a well-operated biogas reactor. The significant difference between zeolite and halloysite is that the latter promoted the immobilization of key methanogenic archaea Methanolinea (belong to Methanomicrobia class). Based on this result, we postulate that halloysite could be useful not only as a sorbent for (bio)gas treatment methodologies but also as an agent for improving biogas production.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Clinoptilolite and Halloysite Addition on Biogas Production and Microbial Community Structure during Anaerobic Digestion

et al. 2020

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“…The other study involved the use of ion exchange materials for ammonia removal (Tao et al 2017) and assessing the effect of pH reduction on the digesters' performance, particularly the features of the microbial community. The extended removal of NH 4 þ -N was completed over ion-exchanging at both temperatures (thermophilic and mesophilic), with ordinary removals of 50 and 70% for the clinoptilolite and resin-dosed reactors, respectively.…”

Section: Ion Exchange Methodsmentioning

confidence: 99%

Approaches to the mitigation of ammonia inhibition during anaerobic digestion – a review

Mutegoa

Hilonga

Njau

2020

Water Practice and Technology

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The digestion process of organic waste rich in high ammonia content has always been a gridlock during the methanogenesis process. The free ammonia may increase inhibition/toxicity, which in turn affects the microbial community in the digester and eventually leads to process failures. Substantial methods have been proposed and assessed for curtailing ammonia emissions in anaerobic digesters to attain a safe and steady process so that, along with high methane production, high quality effluents can also be recovered. There are several means for lowering the erratic ammonia in organic wastes that are in use currently, such as decrease of pH, which favours the formation of ammonium over ammonia in the equilibrium; for example, the use of chemical additives that attach ammonium-N. Ammonia can also be removed from nitrogen-rich substrates during anaerobic digestion through other methods such as struvite precipitation, membrane distillation, air stripping, ion exchange, and adsorption. A thorough survey of different articles has shown that ion exchange, adsorption and changing of the C/N ratio through the co-digestion technique are the most commonly studied methods for mitigating ammonia inhibition in wastewater during anaerobic digestion. A detailed review of these methods in the context of nitrogen-rich substrates will be discussed in this paper.

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“…In the research of Lee, Parka et al (2017) demonstrated that microbial electrolysis cells could increase the population of methane producing bacteria and increase CH4 production. Tao et al (2017) found that an increase in CH4 production could be achieved by increasing bacterial density by a factor of two and a six-fold increase in the Methanosarcinaceae population. Co-digestion.…”

Section: Conditioning Andmentioning

confidence: 99%

Biosolids and Sludge Management

Brisolara

Qi²,

Kendrick³

et al. 2018

Water Environment Research

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The field of biosolids and sludge has progressed significantly over the past year. This review includes summations of the leading research published in journals and conference proceedings in 2017. The following sections are presented: biosolids regulations and management issues; biosolids characteristics, quality and measurement including microconstituents, pathogens, nanoparticles, and metals; sludge treatment technologies including pretreatment and sludge minimization, conditioning and dewatering, digestion, composting, and innovative technologies; disposal and reuse including combustion/incineration, agricultural uses, and innovative uses; odor and air emissions; and energy issues.

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Enhancement of microbial density and methane production in advanced anaerobic digestion of secondary sewage sludge by continuous removal of ammonia

Cited by 57 publications

References 32 publications

Effect of Clinoptilolite and Halloysite Addition on Biogas Production and Microbial Community Structure during Anaerobic Digestion

Effect of Clinoptilolite and Halloysite Addition on Biogas Production and Microbial Community Structure during Anaerobic Digestion

Approaches to the mitigation of ammonia inhibition during anaerobic digestion – a review

Biosolids and Sludge Management

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