Greenhouse gas emissions from landfill leachate treatment plants: A comparison of young and aged landfill

Wang, Xiaojun; Jia, Mingsheng; Chen, Xiaohai; Xu, Ying; Lin, Xiangyu; Kao, C. L.; Chen, Shaohua

doi:10.1016/j.wasman.2014.02.004

Cited by 35 publications

(10 citation statements)

References 31 publications

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“…Leachate from an intermediate age landfill is characterized by high COD (2000–20,000 mg/L), low BOD 5 (500–1000 mg/L) and fairly high NH 4 + -N (1000–4000 mg/L) (Wang et al 2014 ). The bioavailability of leachate, characterized by the BOD 5 /COD ratio, declines with age of the landfill due to a decreasing share of low molecular weight organic compounds in the leachate (Kulikowska 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Temperature-induced changes in treatment efficiency and microbial structure of aerobic granules treating landfill leachate

Mieczkowski

Cydzik‐Kwiatkowska

Rusanowska

et al. 2016

World J Microbiol Biotechnol

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This paper investigates the effect of temperature on nitrogen and carbon removal by aerobic granules from landfill leachate with a high ammonium concentration and low concentration of biodegradable organics. The study was conducted in three stages; firstly the operating temperature of the batch reactor with aerobic granules was maintained at 29 °C, then at 25 °C, and finally at 20 °C. It was found that a gradual decrease in operational temperature allowed the nitrogen-converting community in the granules to acclimate, ensuring efficient nitrification even at ambient temperature (20 °C). Ammonium was fully removed from leachate regardless of the temperature, but higher operational temperatures resulted in higher ammonium removal rates [up to 44.2 mg/(L h) at 29 °C]. Lowering the operational temperature from 29 to 20 °C decreased nitrite accumulation in the GSBR cycle. The highest efficiency of total nitrogen removal was achieved at 25 °C (36.8 ± 10.9 %). The COD removal efficiency did not exceed 50 %. Granules constituted 77, 80 and 83 % of the biomass at 29, 25 and 20 °C, respectively. Ammonium was oxidized by both aerobic and anaerobic ammonium-oxidizing bacteria. Accumulibacter sp., Thauera sp., cultured Tetrasphaera PAO and Azoarcus–Thauera cluster occurred in granules independent of the temperature. Lower temperatures favored the occurrence of denitrifiers of Zooglealineage (not Z. resiniphila), bacteria related to Comamonadaceae, Curvibacter sp., Azoarcus cluster, Rhodobacter sp., Roseobacter sp. and Acidovorax spp. At lower temperatures, the increased abundance of denitrifiers compensated for the lowered enzymatic activity of the biomass and ensured that nitrogen removal at 20 °C was similar to that at 25 °C and significantly higher than removal at 29 °C.

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Section: Introductionmentioning

confidence: 99%

Temperature-induced changes in treatment efficiency and microbial structure of aerobic granules treating landfill leachate

Mieczkowski

Cydzik‐Kwiatkowska

Rusanowska

et al. 2016

World J Microbiol Biotechnol

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“…Within an efficiently designed IWMS water is not considered a final carbon sink. After the adequate treatment, the carbon present in the leachate leaves the liquid phase as CO2 or CH4 (Wang et al, 2014), whereas the carbon in wastewater is distributed between the gaseous emissions and the sludge (Rodriguez-Garcia et al, 2012), being the latter subsequently treated as solid waste. Even though Griffith et al (2009) estimate that up to 25% of the carbon content in wastewater is of fossil origin, it is widely assumed that the totality of carbon is biogenic, and thus it is typically not accounted for (Rodriguez-Garcia et al, 2012).…”

Section: Quantifying Biogenic Carbonmentioning

confidence: 99%

From linear to circular integrated waste management systems: A review of methodological approaches

Cobo

Domínguez-Ramos

Irabien

2018

Resources, Conservation and Recycling

132

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The continuous depletion of natural resources related to our lifestyle cannot be sustained indefinitely. Two major lines of action can be taken to overcome this challenge: the application of waste prevention policies and the shift from the classical linear Integrated Waste Management Systems (IWMSs) that focus solely on the treatment of Municipal Solid Waste (MSW) to circular IWMSs (CIWMSs) that combine waste and materials management, incentivizing the circularity of resources. The system analysis tools applied to design and assess the performance of linear IWMSs were reviewed in order to identify the weak spots of these methodologies, the difficulties of applying them to CIWMSs, and the topics that could benefit from further research and standardization. The findings of the literature review provided the basis to develop a methodological framework for the analysis of CIWMSs that relies on the expansion of the typical IWMS boundaries to include the upstream subsystems that reflect the transformation of resources and its interconnections with the waste management subsystems.

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“…ORP is an important parameter in wastewater treatment and negative values must be maintained for the anaerobic processes to operate effectively. While high redox potentials (aerobic conditions) result in rapid biodegradation [34,37], the optimum ORP value for methanogenesis (anaerobic conditions) usually ranges from -100 to -300 mV [38][39][40]. The ORP tests need to be carried out immediately after sampling [41].…”

Section: Oxidation-reduction Potentialmentioning

confidence: 99%

Improvement of leachate quality and waste stabilization in pilot-scale bioreactor landfills containing geotextile filters and sewage sludge

Yaman¹

2019

Desalination and Water Treatment

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In many developing countries, there has been growing interest in bioreactor landfills for municipal solid waste (MSW) management. This research study has been conducted for comparing leachate characterization and waste stabilization in simulated pilot-scale anaerobic bioreactor landfills. Four pilot-scale reactors were constructed and operated for 540 d. This study aimed to show whether a pilot-scale bioreactor containing sewage sludge mixed with MSW, with a geotextile filter in its drainage layer, and with recirculating leachate, could improve leachate quality and waste stabilization in a landfill. Bioreactor R1 comprised MSW and sewage sludge, while bioreactor R2 was the same as R1 but with a geotextile-1 (GT-1) filter fitted. R3 contained no sludge but only MSW and GT-1 fitted, while R4 contained no sludge but only MSW and two layers of geotextile filter (GT-2 and GT-3). All reactors were operated with leachate recirculation, simulating bioreactor landfills. The results showed that the chemical oxygen demand (COD) half-lives of leachate from the reactors were approximately 8, 7, 9, and 10 months for R1, R2, R3, and R4, respectively. By the end of the study, the waste in R2 and R4 was more stable, with 66% and 65% reductions in volatile solids, respectively. Reactor R2, which contained MSW, sewage sludge, and one-layer geotextile (GT-1), provided higher stabilization of MSW and shorter COD half life than the other reactors.

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Greenhouse gas emissions from landfill leachate treatment plants: A comparison of young and aged landfill

Cited by 35 publications

References 31 publications

Temperature-induced changes in treatment efficiency and microbial structure of aerobic granules treating landfill leachate

Temperature-induced changes in treatment efficiency and microbial structure of aerobic granules treating landfill leachate

From linear to circular integrated waste management systems: A review of methodological approaches

Improvement of leachate quality and waste stabilization in pilot-scale bioreactor landfills containing geotextile filters and sewage sludge

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