Organic Waste Recycling

Polprasert, Chongrak

doi:10.2166/9781780402024

Cited by 50 publications

(19 citation statements)

References 34 publications

(53 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Another reason that may have contributed to digester failure when 37%-40% BW was added was the C/N ratio. The C/N ratio for optimum digestion and optimal gas production should be 25-30:1 (Polprasert 1989), though in other studies, the C/N was found to be 700:5 (Sahm et al 1985;Seghezzo et al 1998). The main source of the N in the co-digestion of BW with MS is the proteins content of the MS.…”

Section: Stage 5: Adding Bw To Ms [35% 36% 37% 40% 42% and 44% Bwmentioning

confidence: 92%

Modifying the ADM1 Model to Predict the Operation of an Anaerobic Digester Co-digesting Municipal Sludge with Bakery Waste

Demitry¹,

Zhong²,

Hansen³

et al. 2015

View full text Add to dashboard Cite

Anaerobic Digestion Model Number1 (ADM1) was modified in order to predict accurately the impact of co-digesting bakery waste (BW) with municipal sludge (MS). BW is an industrial waste (300,000 gallons per day in USA) that contains a high concentration of organic matter (carbohydrates, low lipids and non-detected proteins). BW is an easily biodegradable substrate for creating a favorable microorganism growth environment, which enhances the biogas production needed for wastewater facilities. The modified ADM1 successfully predicted changes in pH, volatile fatty acids (VFA), propionic acid and methane gas production. The ADM1 outputs were compared to experimental batch reactor results of actual BW addition percentages in order to validate the model. Stability of the digestion process was achieved until the ratio range of 37-40% BW: 60-63% MS, and the digestion processes were inhibited at higher ratios of BW. This research provides an alternative to BW management through utilizing the BW to enhance methane production.

show abstract

Section: Stage 5: Adding Bw To Ms [35% 36% 37% 40% 42% and 44% Bwmentioning

confidence: 92%

Modifying the ADM1 Model to Predict the Operation of an Anaerobic Digester Co-digesting Municipal Sludge with Bakery Waste

Demitry¹,

Zhong²,

Hansen³

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The moisture content in human faeces is between 63 and 86 per cent w/w (Rose et al, 2015), while urine is mainly composed of water: between 93 and 96 per cent w/w (Polprasert, 1995).…”

Section: Human Faecal Sludge Characterizationmentioning

confidence: 99%

“…Organics in urine solids range from 65 to 85 per cent (Strauss, 1985) and are predominantly composed of urea (Putman, 1971). The urine liquid fraction is composed mainly of water, organic acids (uric acid, citric acids), electrolytes, solubilized metabolites, hormones, vitamins, ammonium salts, nitrogenous compounds and inorganic salts (Putman, 1971;Polprasert, 1995).…”

Section: Human Faecal Sludge Characterizationmentioning

confidence: 99%

Microwaving human faecal sludge as a viable sanitation technology option for treatment and value recovery – A critical review

Afolabi

Sohail

2017

Journal of Environmental Management

View full text Add to dashboard Cite

“…Anaerobic digestion was the breakdown of complex organic matter by the microorganisms in the absence of free oxygen producing methane, carbon dioxide, and ammonia, traces of other gases and organic acids of low molecular weight as end products of the process [16]. An anaerobic digestion of fruit and vegetable wastes were the rapid acidification due to the lower pH of wastes and the larger production of volatile fatty acids (VFA), which reduced the methanogenic activity of the reactor.…”

Section: Wastes Of Fruit and Vegetablementioning

confidence: 99%

Characterisation Peal of Fruit and Leaf of Vegetable Waste with Cow Dung for Maximizing the Biogas Yield

Abebe¹

2017

IJEPE

View full text Add to dashboard Cite

Abstract:The biogas production and methane (CH 4 ) enrichment for anaerobic digestion (AD) of fruit and vegetable waste (FVW). The biogas production and methane content of fruit and vegetable wastes (FVW) degradation were evaluated against a treatment combination with a cow dung at a Ratio of FVW to Cow dung T1 (cow dung alone), T2 (1:3), T3 (1:1), T4 (3:1),and T5 (FVW alone). The digesters were operated for 80 days. The highest total methane yields about 78.35% was obtained from the cow dung digester (T1). The highest production of biogas yield (7552.67 ml) was observed in T1 and the lowest biogas production rate (2652.83ml) was from a reactor operated by FVW alone. Similar to the biogas yield, higher percentage of methane was produced in 1. Anaerobic digestion; vegetable and fruit wastes of high calorific contents can be transformed to a source of energy through the production of biogas in this day and age of energy insufficiencies. Role in maximizing the process of anaerobic digestion through speeding up hydrolysis and to compare production potentials of commonly available wastes in Addis Ababa for possible co-digestion in large scale production of biogas. Thermo-chemical pre-treatment was the most effective for speeding up hydrolysis with the co-digested substrates producing maximum biogas. The moisture content ranged between 67-83%. The pH reduced from 6.8-7.2 before digestion to 6.2-6.8 after digestion. The desired C: N ratio was between 18:1 to 32:1 for Anaerobic Digestion. The gas produced was found to contain 63.89% methane, 33.12% CO 2 and 3% other gases.

show abstract

Organic Waste Recycling

Cited by 50 publications

References 34 publications

Modifying the ADM1 Model to Predict the Operation of an Anaerobic Digester Co-digesting Municipal Sludge with Bakery Waste

Modifying the ADM1 Model to Predict the Operation of an Anaerobic Digester Co-digesting Municipal Sludge with Bakery Waste

Microwaving human faecal sludge as a viable sanitation technology option for treatment and value recovery – A critical review

Characterisation Peal of Fruit and Leaf of Vegetable Waste with Cow Dung for Maximizing the Biogas Yield

Contact Info

Product

Resources

About