The impact of temperature and gas-phase oxygen on kinetics of in situ ammonia removal in bioreactor landfill leachate

Berge, Nicole D.; Reinhart, Debra R.; Dietz, John D.; Townsend, Tim

doi:10.1016/j.watres.2007.01.049

Cited by 25 publications

(6 citation statements)

References 20 publications

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“…2 and 11), and this constituent tends to be conserved in the landfill over time, and thus increases in concentration, presenting a treatment challenge . Using aerobic treatment, ammonia can be nitrified to nitrate, which denitrifies to N 2 gas in a subsequent anoxic step, thereby removing it from the system (Berge et al 2006(Berge et al , 2007. This approach has been examined in several different configurations as illustrated in Fig.…”

Section: Waste Curingmentioning

confidence: 99%

Sustainable Practices for Landfill Design and Operation

Townsend¹,

Powell²,

Jain³

et al. 2015

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Section: Waste Curingmentioning

confidence: 99%

Sustainable Practices for Landfill Design and Operation

Townsend¹,

Powell²,

Jain³

et al. 2015

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“…Previous studies demonstrated that all samples of LFLs exhibited acute toxicity to the bacterium Vibrio fischeri [11,13]. This toxicity, as reported, was owing to the presence of ammonia [20][21][22]40], phenols [6,7] and organics such as polycyclic aromatic hydrocarbons (PAHs) [6,41] and phthalates [9]. Isidori et al .…”

Section: Characterization Of Lfl From Djebel Chekir Dischargementioning

confidence: 72%

“…High ammonia, contained in raw LFL, is toxic [21] and was not tolerated by a wide range of microorganisms since it can inhibit microbial activity of activated sludge [20][21][22] and therefore leachate ammonia-nitrogen is a significant longterm pollution problem that may greatly influence when post-closure care of a landfill may end or be reduced [40]. For this reason, the concentration of ammonia in the treated LFL was evaluated.…”

Section: Microorganismsmentioning

confidence: 99%

Performance of Biological Treatment of High‐level Ammonia Landfill Leachate

Ellouze

Aloui

Sayadi

2008

Environmental Technology

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The biological treatment efficiency of landfill leachate (LFL) from a Tunisian site collection was investigated in this study. The raw effluent was highly charged with organic matter (more than 25 g l(-1) of chemical oxygen demand (COD)), ammonia (1.7 g l(-1) and salts (20 g l(-1)). With the presence of heavy metals, phenols and hydrocarbons, LFL exhibited high toxicity to organisms since it totally inhibited the bioluminescence of Vibrio fischeri and the germination of Lepidium sativum seeds. The biological oxygen demand (BOD5)/COD ratio of 0.5 indicates that the effluent can be biologically treated. Sludge from a wastewater treatment plant was acclimatized to the effluent in continuous batches. During the acclimatization phase, the consortia demonstrated a good ability to remove organic matter and toxicity in spite of an increase of introduced load reaching 3.2 g of COD 1.d. Consequently, the biodegradation experiments were carried out in a stirred tank reactor (STR) at organic loading rate (OLR) ranging from 0.5 to 5.4 g l(-1) per day. The hydraulic retention time was decreased from 50 days to 4.6 days. The process seemed to be efficient to eliminate organics and ammonia. The COD removal efficiency reached a maximum of 80% for a loading rate of 5.4 g l(-1) per day. The values of N-NH4+ became less than those recommended by standards requested for rejection in public canalizations. During the treatment process, the biomass was increased from 0.8 g l(-1) at the start-up of the process to 3 g l(-1). On the other hand, results of toxicity examinations showed that the treatment was efficient to provide detoxification of the effluent indicating a good adaptability of the consortia in spite of the presence of problematic compounds. The increase of the loading rate up to 6 g l(-1) was responsible for the perturbation of the system and caused an accumulation of residual COD and toxicity.

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“…Heterogeneity of the waste environment does not always allow for uniform distribution of oxygen promoting the formation of anoxic and aerobic pockets. These conditions promote simultaneous nitrification and denitrification to occur within a landfill Berge et al, 2007;Giannis et al, 2008;Prantl et al, 2006). Therefore, ammonia-nitrogen can be converted to either nitrate, nitrite, or nitrogen gas.…”

Section: Aerobic Bioreactor Landfillmentioning

confidence: 99%

Application of landfill treatment approaches for stabilization of municipal solid waste

Bolyard

Reinhart

2016

Waste Management

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This research sought to compare the effectiveness of three landfill enhanced treatment approaches aimed at removing releasable carbon and nitrogen after anaerobic landfilling including flushing with clean water (FB 1), leachate recirculation with ex-situ treatment (FB 2), and leachate recirculation with ex-situ treatment and in-situ aeration (FB 3). After extensive treatment of the waste in the FB scenarios, the overall solids and biodegradable fraction were reduced relative to the mature anaerobically treated waste. In terms of the overall degradation, aeration did not provide any advantage over flushing and anaerobic treatment. Flushing was the most effective approach at removing biodegradable components (i.e. cellulose and hemicellulose). Leachate quality improved for all FBs but through different mechanisms. A significant reduction in ammonia-nitrogen occurred in FB 1 and 3 due to flushing and aeration, respectively. The reduction of chemical oxygen demand (COD) in FB 1 was primarily due to flushing. Conversely, the reduction in COD in FBs 2 and 3 was due to oxidation and precipitation during Fenton's Reagent treatment. A mass balance on carbon and nitrogen revealed that a significant fraction still remained in the waste despite the additional treatment provided. Carbon was primarily converted biologically to CH4 and CO2 in the FBs or removed during treatment using Fenton's Reagent. The nitrogen removal occurred through leaching or biological conversion. These results show that under extensive treatment the waste and leachate characteristics did meet published stability values. The minimum stability values achieved were through flushing although FB 2 and 3 were able to improve leachate quality and solid waste characteristics but not to the same extent as FB 1.

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The impact of temperature and gas-phase oxygen on kinetics of in situ ammonia removal in bioreactor landfill leachate

Cited by 25 publications

References 20 publications

Sustainable Practices for Landfill Design and Operation

Sustainable Practices for Landfill Design and Operation

Performance of Biological Treatment of High‐level Ammonia Landfill Leachate

Application of landfill treatment approaches for stabilization of municipal solid waste

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