Introducing Fog to Sludge – A Sticky Proposition

Shea, Tim; Johnson, Thomas D.; Gabel, Dale; Forbes, Bob

doi:10.2175/193864710798170513

Cited by 6 publications

(2 citation statements)

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“…Despite the claimed benefits of codigestion, research into the anaerobic digestion of high-strength lipid wastes European Scientific Journal, ESJ ISSN: 1857-7881 (Print) e -ISSN 1857-7431 11th Eurasian Multidisciplinary Forum, EMF, 1-2 September 2022, Batumi, Georgia www.eujournal.org 127 has shown a slew of practical difficulties. Inhibition of acetoclastic and methanogenic bacteria, substrate and product transport limitations, sludge flotation, digester foaming, pipe and pump obstructions, and clogging of gas collection and handling systems are among the operational issues (Hanaki et al, 1981;Koster et al, 1987;Shea et al, 2010;Dasa et al, 2016). The LCFAs are the organic parts of FOG that are critical to methane production in anaerobic digestion.…”

Section: Effect Of Lcfa Content On Biogas Productionmentioning

confidence: 99%

Effect of Lipid Content on Anaerobic Digestion Process and Microbial Community: Review Study

Alhraishawi

Aslan

2023

ESJ

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The indiscriminate release of significant amounts of food waste, fat oil and grease, and sewage sludge (SS) into the environment causes severe contamination in many nations. There are numerous potential treatment methods to cope with organic wastes, but anaerobic digestion is currently widely accepted to handle different kinds of biological waste. One of the pillars supporting anaerobic digester biogas production increase in treatment plants is the use of fats in the wastewater. However, it has been claimed that high-fat wastes, particularly mono-digestion in the anaerobic reactor, inhibit acetoclastic and methanotrophic bacteria delay the formation of gas even more, and overtax the system. The aim of this review is to review several publications that dealt with the effect of LCFs and FOG on AD performance and associated methane production and microbial communities, as well as the mechanism of LCFA generation and its inhibitory effect on anaerobic digestion performance, and also addressed the improvement of system efficiency using co-digestion with lipid wastes.

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Section: Effect Of Lcfa Content On Biogas Productionmentioning

confidence: 99%

Effect of Lipid Content on Anaerobic Digestion Process and Microbial Community: Review Study

Alhraishawi

Aslan

2023

ESJ

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“…Gas samples from eight anaerobic digesters from various wastewater treatment plants showed fairly consistent composition of methane and carbon dioxide and highly variable results of hydrogen sulfide and siloxanes (Bullard et al, 2010). A summary of various experiences for accepting and co-processing FOG wastes with sludges at various treatment plants was described (Shea et al, 2010).…”

Section: Process Technologymentioning

confidence: 99%

Anaerobic Processes

Evans¹

2011

wer

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The anaerobic processes literature review contains a comprehensive discussion of articles published in 2010 with emphasis on biological wastewater treatment processes that exploit an environment devoid of oxygen. Anaerobic systems, like the upflow anaerobic sludge blanket (UASB) reactor and the anaerobic filter (AF), represent the traditional emphasis of anaerobic processes literature review. Anaerobic hydrogen production and anaerobic ammonia oxidation (anammox) have been incorporated more recently into this chapter of the literature review. This year's anaerobic processes literature review is divided into the following sections: integrated approaches, modeling advances, process technology, hydrogen production, microbiology, anammox, treatability studies, and inhibition of the anaerobic process. Integrated Approaches The integrated approaches section incorporates research concerning pretreatment and post-treatment steps used to enhance the anaerobic processes. Research regarding co-digestion of agricultural, municipal, and other wastes is included in this section. Additionally, evaluation of coupled technologies is considered; e.g. anaerobic digestion (AD) incorporated into ethanol facilities to enhance overall conversion of cellulose to useful products. Pretreatment. High crystalline cellulose was pretreated with N-methyl-morpholine-N-oxide (NMMO) at 90-120°C for 0.5-15 h in three different types of NMMO solutions (Jeihanipour et al., 2010). Pretreatment with NMMO resulted in complete digestion of cellulose after 15 d with a corresponding biogas yield of 415 L/kg-cellulose.The use of alkaline, solid-state pretreatment of corn stover with sodium hydroxide (NaOH) concentrations of 1%, 2.5%, 5.0%, and 7.5% was investigated for improving lignin degradation and biogas production potential (Zhu, Wan, et al., 2010). Lignin degradation increased from 9.1% to 46.2% for NaOH concentrations from 1% to 7.5%, respectively, and biogas yield peaked at 372.4 L/kg-volatile solids (VS) for an NaOH concentration of 5%. A study was conducted to evaluate the effect of thermal pretreatment at 70-90°C on biogas production, solubilization of organic compounds, the release of inorganic species, and the effect

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