Enhancing biogas production from anaerobic biodegradation of the organic fraction of municipal solid waste through leachate blending and recirculation

Nair, Arjun; Sartaj, Majid; Kennedy, Kevin J.; Coelho, N.

doi:10.1177/0734242x14546036

Cited by 33 publications

(15 citation statements)

References 22 publications

(27 reference statements)

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“…The behavior of the system is usually described by the quadratic equation shown as Eq. (3) (Montgomery 2008).…”

Section: Discussionmentioning

confidence: 99%

“…The balance of these two types of ammonia is mainly a function of pH and temperature. It is common in aquatic chemistry to refer to and express the sum of the two as simply ammonia or total ammonia nitrogen (TAN) (Nair et al 2014). The presence of excess ammonia can contribute to accelerated eutrophication of lakes and rivers, dissolved oxygen depletion and fish toxicity in receiving water bodies (Du et al 2005).…”

Section: Introductionmentioning

confidence: 99%

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Optimization of ammonia removal by ion-exchange resin using response surface methodology

Ding

Sartaj

2016

Int. J. Environ. Sci. Technol.

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The ability of ion-exchange resin for ammonia removal from aqueous solution was studied. The results showed that Amberlite ion-exchange resin was effective in removing ammonia from aqueous solution. Factorial design and response surface methodology were applied to evaluate and optimize the effects of pH, resin dose, contact time, temperature and initial ammonia concentration. Low pH condition was preferred with the optimum pH found to be 6. High resin dose generated high removal rate and low exchange capacity. Results of factorial design and response surface methodology showed that temperature was not a significant parameter. The model prediction was in good agreement with observed data (R 2 = 0.957). The optimum Q e was 28.78 mg/ g achieved at pH = 6 and initial TAN concentration of 3000 mg/L. The kinetics followed the pseudo-second-order kinetic model (R 2 = 0.999). Equilibrium data were fitted to Langmuir and Freundlich isotherm models with Langmuir model providing a slightly better predication (R 2 = 0.996). The resin was completely regenerated by 2 N H 2 SO 4 .

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“…The behavior of the system is usually described by the quadratic equation shown as Eq. (3) (Montgomery 2008).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of ammonia removal by ion-exchange resin using response surface methodology

Ding

Sartaj

2016

Int. J. Environ. Sci. Technol.

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“…The OFMSW includes components from the major food groups that are representative of food used in Canadian kitchens and was derived based on the Canadian Food Guide (Nair et al, 2014). OFMSW simulated kitchen waste consisted of cooked rice (17.5 wt %), cooked pasta (17.5 wt %), carrot (11 wt %), apple (11 wt %), banana (11 wt %), cabbage (11 wt%), ground beef (10 wt %), dog food (10 wt %) and biodegradable garbage bags (1 wt %).…”

Section: Substrates Characteristicsmentioning

confidence: 99%

Enhanced biogas production by anaerobic co-digestion from a trinary mix substrate over a binary mix substrate

2015

Self Cite

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The synergetic enhancement of mesophilic anaerobic co-digestion of trinary and binary mix of organic fraction of municipal solid waste (OFMSW) + primary sludge (PS) + thickened waste activated sludge (TWAS) as substrates was investigated through batch biological methane potential (BMP) and semi-continuous flow reactor tests. Cumulative biogas yield (CBY) yield for the binary mix of OFMSW:TWAS was 555, 580, and 660 mL/g volatile solids (VS)added for an OFMSW:TWAS ratio of 25:75, 50:50, and 75:25, respectively, which was 48, 78.5, and 140% higher than the calculated expected biogas (CEB) yield from the corresponding individual substrates. The trinary mixture of OFMSW:TWAS:PS at ratios of 25:37.5:375.5, 50:25:25 and 75:12.5:12.5 was able to produce 680, 710 and 780 mL/g VSadded, respectively, which was 25.5, 62.0 and 135.6% more biogas than the calculated expected biogas yield from the corresponding individual substrates. Cumulative methane yield (CMY) of trinary mixtures was also higher than the corresponding binary mixtures (20, 27, and 12 % increase for OFMSW:TWAS:PS at a ratio of 25:37.5:37.5, 50:25:25, and 75:12.5:12.5 compared to the binary mix of OFMSW:TWAS at a ratio of 25:75, 50:50, and 75:25, respectively). Methane content of the biogas varied from 54 to 57%. The results from semi-continuous flow anaerobic reactors under hydraulic retention times (HRT) of 15, 10 and 7 days supported the results of batch biological methane potential tests. The results were conclusive that enhancement in biogas production was noticeably higher from the co-digestion of trinary mix of organic fraction of municipal solid waste+ thickened waste activated sludge + primary sludge than the binary mix organic fraction of municipal solid waste+thickened waste activated sludge or thickened waste activated sludge+primary sludge with concomitant improvements in VS removal and biodegradability for tri-digestion of organic fraction of municipal solid waste, thickened waste activated sludge and primary sludge.

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“…Hublin et al (2014) investigated the economic and environmental effects of biogas derived from the anaerobic digestion of agro-industrial waste and Calabrò et al (2011) modeled biogas extraction from an Italian landfill. Operational and meteorological influences on the biogas composition (Meres et al, 2004), system integration (Edwards et al, 1988;Polprasert et al, 1986), leachate blending and recirculation (Nair et al, 2014) are among the rich sources of information found in the literature. The effects of key parameters on biogas production are another topic of interest.…”

Section: Feasibility Study For Retrofitting Biogas Cogeneration Systementioning

confidence: 99%

Feasibility study for retrofitting biogas cogeneration systems to district heating in South Korea

Chung

Park

2015

Waste Manag Res

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A feasibility study was performed to assess the technical and economic merits of retrofitting biogas-based cogeneration systems to district heating networks. Three district heating plants were selected as candidates for accommodating heat recovery from nearby waste treatment stations, where a massive amount of biogas can be produced on a regular basis. The scenario involves constructing cogeneration systems in each waste treatment station and producing electricity and heat. The amounts of biogas production for each station are estimated based on the monthly treatment capacities surveyed over the most recent years. Heat produced by the cogeneration system is first consumed on site by the waste treatment system to keep the operating temperature at a proper level. If surplus heat is available, it will be transported to the nearest district heating plant. The year-round operation of the cogeneration system was simulated to estimate the electricity and heat production. We considered cost associated with the installation of the cogeneration system and piping as initial investments. Profits from selling electricity and recovering heat are counted as income, while costs associated with buying biogas are expenses. Simple payback periods of 2-10 years were projected under the current economic conditions of South Korea. We found that most of the proposed scenarios can contribute to both energy savings and environmental protection.

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Enhancing biogas production from anaerobic biodegradation of the organic fraction of municipal solid waste through leachate blending and recirculation

Cited by 33 publications

References 22 publications

Optimization of ammonia removal by ion-exchange resin using response surface methodology

Optimization of ammonia removal by ion-exchange resin using response surface methodology

Enhanced biogas production by anaerobic co-digestion from a trinary mix substrate over a binary mix substrate

Feasibility study for retrofitting biogas cogeneration systems to district heating in South Korea

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