Reviewing the anaerobic digestion of food waste for biogas production

Zhang, Cunsheng; Su, Haijia; Baeyens, Jan; Tan, Tianwei

doi:10.1016/j.rser.2014.05.038

Cited by 1,059 publications

(468 citation statements)

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“…As the world's most populous country, China produces approximate 90 million tons of KW each year [1]. Beijing, the second largest Chinese city by urban area, produces 1,700 tons of KW daily [2].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Kitchen Waste and the Formation of Floating Brown Particles (FBP) in the Anaerobic Digestion Process

Jiang

Liu

et al. 2018

Pol. J. Environ. Stud.

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Five types of kitchen waste (KW) from China -including hop pot (HP), fast food (FF), Hebei cuisine (HC), university canteen (UC), and other mixed KW (Other) -were investigated as feedstock for potential biogas and methane production. The biodegradability of KW was measured using batch anaerobic digestion (AD) tests and feedstock at an inoculum ratio (F/I) of 0.5. Gompertz and Cone models were used to determine the kinetic parameters of KW degradation, biogas, and methane production. Results showed that HP had the highest lag phase time of 5.46 days. Methane production varies with different sources of KW. HP had the highest methane yield of 363.9 mL/g-VS added as compared to a sample of FF (334.8 mL/g-VS added ), other ( 278.5 mL/g-VS added ), UC (239.2 mL/g-VS added ), and HC (236.0 mL/g-VS added ). The biodegradability of KW ranged from 39.5% to 50.4%. During the AD process a certain amount of fl oating brown particles (FBP) were formed, which may be the main inhibiting factor of methane production. Analysis of 13 C NMR and FTIR revealed that the main component of FBP was calcium stearate. The formation mechanism of calcium stearate may contribute to the relatively high lipid content (18.6% to 30.9%) of the KW sample, which subsequently resulted in over-accumulation of long-chain fatty acids (LCFAs) and reaction with Ca . Using lipid-rich substrates as feedstock may be an effi cient approach to adding Ca 2+ artifi cially for reducing the inhibition of LCFAs.

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Section: Introductionmentioning

confidence: 99%

Characteristics of Kitchen Waste and the Formation of Floating Brown Particles (FBP) in the Anaerobic Digestion Process

Jiang

Liu

et al. 2018

Pol. J. Environ. Stud.

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“…Anaerobic digestion (AD) technology has been widely applied to dispose of various kinds of organic waste products, such as agricultural solid wastes, livestock manure, and domestic waste, and has led to renewable energy production, nutrient recycling, and ecological environment protection (Zhang et al 2014;Kamali et al 2016). According to a Chinese renewable energy report, approximately 100,000 large-scale biogas-engineering projects were constructed in 2013 (Wu et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Production of Bioflocculants Prepared from Wastewater Supernatant of Anaerobic Co-Digestion of Corn Straw and Molasses Wastewater Treatment

Zhao

Sun

et al. 2017

BioResources

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a Novel bioflocculants (BS-MBF) were prepared using the wastewater supernatant from anaerobic co-digestion of corn straw and molasses wastewater as a nutrient resource. Acetic acid and ethanol were the dominant fermentation products during the anaerobic digestion process and were estimated to be 50.5% and 30.0%, respectively, after 150 d of operation. Equal volumes of bioflocculant producing bacteria F2 (Rhizobium radiobacter) and F6 (Bacillus sphaericus) were mixed to form F + , which was inoculated to wastewater supernatant at different times. A maximum flocculation activity of 91.3% was achieved, and 2.32 g/L of purified bioflocculant was extracted when a compound medium from 110-d wastewater supernatant was used. The removal efficiencies of heavy metals from simulated electroplating wastewater were tested by using these prepared bioflocculants. The optimal conditions for heavy metal removal to BS-MBF were found to be at 374 mg/L at an initial pH of 6.0 and a contact time of 40 min. The adsorption capacities for Cu 2+ and Zn 2+ reached more than 90%, while for Cr 6+ it reached approximately 30%. Overall, the study showed for the first time that wastewater supernatant from anaerobic co-digestion of corn straw and molasses wastewater can be used for producing bioflocculants, which can be effectively used to remove heavy metals from electroplating wastewater.

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“…hydrolysis is the major rate-limiting step due to the complexity of the feedstock, especially for the FPW containing lignocellulosic biomass, animal fats and protein [3,5 ]. Pretreatment and pre-hydrolysis are able to accelerate the production of intermediates (fatty acids, fermentable sugars, amino acids, etc.)…”

Section: Introductionmentioning

confidence: 99%

“…Pretreatment and pre-hydrolysis are able to accelerate the production of intermediates (fatty acids, fermentable sugars, amino acids, etc.) for synthesizing volatile fatty acid (VFA) [3]. Thermal, ultrasound, alkaline, acid, thermal-chemical and enzymatic methods are commonly employed to hydrolyse carbohydrates, such as slaughterhouse and meat-processing wastes, which are rich in protein and fats [4,8 ,9].…”

Section: Introductionmentioning

confidence: 99%