Biological denitrification from mature landfill leachate using a food-waste-derived carbon source

Yan, Feng; Jiang, Jianguo; Zhang, Haowei; Liu, Nuo; Zou, Quan

doi:10.1016/j.jenvman.2018.03.003

Cited by 37 publications

(14 citation statements)

References 40 publications

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“…In particular, the co-substrate may have played an important role in pollution removal as reported elsewhere [23,27]. Despite the lower biodegradation kinetics of the allochthonous biomass, the high hydraulic retention time in the SBRs (5 d) could have favored similar removal performances in both reactors [28].…”

Section: Cod Removal Performancementioning

confidence: 71%

Assessment of landfill leachate biodegradability and treatability by means of allochthonous and autochthonous biomasses

et al. 2020

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The biodegradability and treatability of a young (3 years old) municipal landfill leachate was evaluated by means of chemical oxygen demand (COD) fractionation tests, based on respirometric techniques. The tests were performed using two different biomasses: one cultivated from the raw leachate (autochthonous biomass) and the other collected from a conventional municipal wastewater treatment plant after its acclimation to leachate (allochthonous biomass). The long term performances of the two biomasses were also studied. The results demonstrated that the amount of biodegradable COD in the leachate was strictly dependent on the biomass that was used to perform the fractionation tests. Using the autochthonous biomass, the amount of biodegradable organic substrate resulted in approximately 75% of the total COD, whereas it was close to 40% in the case of the allochthonous biomass, indicating the capacity of the autochthonous biomass to degrade a higher amount of organic compounds present in the leachate. The autochthonous biomass was characterized by higher biological activity and heterotrophic active fraction (14% vs 7%), whereas the activity of the allochthonous biomass was significantly affected by inhibitory compounds in the leachate, resulting in a lower respiration rate (SOUR = 13 mg O2 gVSS-1 h-1 vs 37 mg O2 gVSS-1 h-1). The long-term performance of the autochthonous and allochthonous biomasses indicated that the former was more suitable for the treatment of raw landfill leachate, ensuring higher removal performance towards the organic pollutants.

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Section: Cod Removal Performancementioning

confidence: 71%

Assessment of landfill leachate biodegradability and treatability by means of allochthonous and autochthonous biomasses

et al. 2020

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“…Essential to the nutrient removal process is the C/N ratio as it can often dictate the amount of remaining nitrogen in the effluent. In Yan, et al, (2018), is was discovered that with a C/N ratio of 7 and a temperature of 25 o C, the general discharge standards could be met for nitrogen and COD content in effluents that were to be discharged into Chinese wastewater streams of watercourses in the region. This is quite similar to what was determined in where it was determined that the optimal C/N ratio and temperature was 6 and 25 o C respectively.…”

Section: Biological Nutrient Removal (Bnr)mentioning

confidence: 99%

“…This may be attributed to the fact that using sodium acetate as a carbon source only provides that waste with a singular compound and there are various types of bacteria within the reactor. Using different waste streams as a source for the nutrient removal provides the bacteria with alternatives to acetate that may be more favoured, thus engaging all bacteria and making them active instead of one particular type (Yan, et al, 2018). This would imply that using various fermentative liquids may have a beneficial reaction and actually work to increase the efficiency and productivity of a general reactor (Guo, et al, 2017).…”

Section: Biological Nutrient Removal (Bnr)mentioning

confidence: 99%

Production Of Value-Added Products From Waste Derived Volatile Fatty Acids: A Review

Hinnecke¹

2021

Preprint

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Due to the exponential growth of the human population and declining environmental quality in the world, waste derived volatile fatty acids (VFAs) have been identified as a source for the production of value-added products. Throughout this paper, different technologies for the production of value-added products from VFAs, various high content VFA waste streams and value-added products from each process will be discussed. Additionally, an in-depth literature review will be conducted on 5 value added products from VFAs. Highlights of various experiments will be identified as well as common trends in experiments to date. Some considerations will also be given to particular strategies and methods which may enhance the production of a value-added product in the future. Even through the uncertainty it has been proven that waste derived VFAs are a major candidate in contributing to a more environmentally and sustainable society in the immediate future.

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“…For this reason, the most commonly used biological method in industrial wastewater treatment plants is still a conventional activated sludge process that involves autotrophic nitrification and heterotrophic denitrification [13][14][15]. The stability of this process and the treatment outcome depend on the microbial community structure, the amount of functional groups belong to the activated sludge (denitrifiers, nitrifiers, heterotrophic microorganisms), their activity (Nitrate Utilization Rate-NUR, Ammonia Utilization Rate-AUR, Oxygen Utilization Rate-OUR), and the ratio of AOB (Ammonia-Oxidizing Bacteria) to NOB (Nitrite-Oxidizing Bacteria) [14,16,17], while the microbial activity is influenced by operating parameters, such as pH, temperature, and oxygen concentration as well as the nitrogen and COD loading rate and COD/TN ratio in the influent [1,13,15,18]. The increase in biological nitrogen removal efficiency in wastewater with a low COD/TN ratio can be achieved by adding an external carbon source [18].…”

Section: Introductionmentioning

confidence: 99%

“…The stability of this process and the treatment outcome depend on the microbial community structure, the amount of functional groups belong to the activated sludge (denitrifiers, nitrifiers, heterotrophic microorganisms), their activity (Nitrate Utilization Rate-NUR, Ammonia Utilization Rate-AUR, Oxygen Utilization Rate-OUR), and the ratio of AOB (Ammonia-Oxidizing Bacteria) to NOB (Nitrite-Oxidizing Bacteria) [14,16,17], while the microbial activity is influenced by operating parameters, such as pH, temperature, and oxygen concentration as well as the nitrogen and COD loading rate and COD/TN ratio in the influent [1,13,15,18]. The increase in biological nitrogen removal efficiency in wastewater with a low COD/TN ratio can be achieved by adding an external carbon source [18]. The most frequently used carbon sources are easily biodegradable organics, such as ethanol [19,20], methanol [20][21][22] and acetic acid [15,20,21,23].…”

Section: Introductionmentioning

confidence: 99%

Challenges in Treatment of Digestate Liquid Fraction from Biogas Plant. Performance of Nitrogen Removal and Microbial Activity in Activated Sludge Process

Chuda¹,

Ziemiński²

2021

Energies

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Even thoughdigestate, which is continually generated in anaerobic digestion process, can only be used as fertilizer during the growing season, digestate treatment is still a critical, environmental problem. That is why the present work aims to develop a method to manage digestate in agricultural biogas plant in periods when its use as fertilizer is not possible. A lab-scale system for the biological treatment of the digestate liquid fraction using the activated sludge method with a separate denitrification chamber was constructed and tested. The nitrogen load that was added tothe digestate liquid fraction accounted for 78.53% of the total nitrogen load fed into the reactor. External carbon sources, such as acetic acid, as well as flume water and molasses, i.e., wastewater and by-products from a sugar factory, were used to support the denitrification process. The best results were obtained using an acetic acid and COD (Chemical Oxygen Demand)/NO3–N (Nitrate Nitrogen) ratio of 7.5. The removal efficiency of TN (Total Nitrogen), NH4–N (Ammonia Nitrogen) and COD was 83.73%, 99.94%, 86.26%, respectively. It was interesting to see results obtained that were similar to those obtained when using flume water and COD/NO3–N at a ratio of 8.7. This indicates that flume water can be used as an alternative carbon source to intensify biological nitrogen removal from digestate.

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Biological denitrification from mature landfill leachate using a food-waste-derived carbon source

Cited by 37 publications

References 40 publications

Assessment of landfill leachate biodegradability and treatability by means of allochthonous and autochthonous biomasses

Assessment of landfill leachate biodegradability and treatability by means of allochthonous and autochthonous biomasses

Production Of Value-Added Products From Waste Derived Volatile Fatty Acids: A Review

Challenges in Treatment of Digestate Liquid Fraction from Biogas Plant. Performance of Nitrogen Removal and Microbial Activity in Activated Sludge Process

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