The "Chemical Oxygen Demand / Total Volatile Acids" Ratio as an Anaerobic Treatability Indicator for Landfill Leachates

Contrera, Ronan Cleber; Silva, K. C. da Cruz; Silva, G. H. Ribeiro; Morita, Dione Mari; Zaiat, Marcelo; Schalch, Valdir

doi:10.1590/0104-6632.20150321s00003024

Cited by 12 publications

(4 citation statements)

References 34 publications

(30 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ratios between 0.4 and 0.6 are an indicator that the organic matter in the leachate is biodegradable. In mature landfills, this ratio is often in the range of 0.05 to 0.2 reducing as leachate from mature landfills typically contains humic and fulvic acids as well as recalcitrant organic compound, which are not biodegradable [39,41,42,43]. The leachate from this study recorded a BOD 5 /COD ratio ranging from 0.18-0.26, indicating a stable leachate which may prove difficult to treat biologically but should respond well to physicochemical treatments [41,42,44].…”

Section: Leachate Composition and Characterisationmentioning

confidence: 76%

Bioremediation of Landfill Leachate Using Isolated Bacterial Strains

Morris¹,

Garcia-Cabellos²,

Enright³

et al. 2018

IJEBB

View full text Add to dashboard Cite

Landfilling is one of the most common and widely accepted practices for the disposal of waste throughout the world. Leachate, a major drawback of landfilling, continues to be produced at vast rates and current treatment options are costly and often inadequate. The management of leachate is of economic and environmental importance, due to its potential to cause contamination to ground and surface water. This research focuses on treating leachate in a cost-effective manner through bioremediation. Microorganisms were isolated from landfill leachate (LFL) and screened to determine their ability to remediate a wide range of compounds found in leachate, such as ammonia, phosphate and nitrate. Selected isolates were identified as belonging to the phylum"s Firmicutes, Actinobacteria, and Proteobacteria, isolates were inoculated into soil contained in a fixed bed column system. The column system was optimised and used for the treatment of LFL over a 10-hour period. High percentage removal rates were achieved for ammonia (>90%) and removal nitrate and phosphate (>60%). Although EPA discharge limits were not achieved, bioremediation using selected microbial strains represents a cost effective treatment option when compared to conventional methods. Research is now required to further optimise this system to achieve discharge limits for all compounds tested.

show abstract

Section: Leachate Composition and Characterisationmentioning

confidence: 76%

Bioremediation of Landfill Leachate Using Isolated Bacterial Strains

Morris¹,

Garcia-Cabellos²,

Enright³

et al. 2018

IJEBB

View full text Add to dashboard Cite

show abstract

“…Contrera et al. (2015) state that changes related to flow generated, chemical composition, and the concentration of leachate occur according to changes from local to local, seasonal, and also throughout the landfill's life cycle.…”

Section: Resultsmentioning

confidence: 99%

Utilization of UV‐A and UV‐C radiation in advanced oxidation processes with the intention of removing color and organic matter from the gross leachate of a stabilized sanitary landfill

Pereira

Rocha

Silva

et al. 2020

Environmental Quality Mgmt

View full text Add to dashboard Cite

The present work investigated color and biochemical oxygen demand (COD) removal from treated landfill leachate via advanced oxidative processes (AOPs) artificially emitted. The AOP H 2 O 2 /UV, TiO 2 /UV, and photolysis were tested in two bench-scale photoreactors: The first one with UV-C lamp and the other with UV-A lamp associated or not with coagulation / flocculation pretreatment. Crude leachate samples with pH ranging from 8 to 3 were used, and time varied in 30, 45, and 60 minutes. Experiments were performed in two stages: step 1 with a 20 mL volume from each sample and step 2 with repetition of the best results from the previous step, adopting the 150 mL volume. In step 1, the AOP applied in the crude leachate sample showed the best results, standing out H 2 O 2 /UV-C with 30 minutes and TiO 2 /UV-A with 60 minutes. In step 2, H 2 O 2 /UV-C had a 60% color removal and 25% COD reduction, while TiO 2 /UV-A had a 10% color removal and 20% COD reduction. Therefore, the H 2 O 2 /UV-C process was the most efficient, because the complex characteristics of the effluent interfered in the TiO 2 /UV-A efficiency, but it is necessary to eliminate the process interferences. The use of artificial radiation is a viable alternative; however, it can be costly, being relevant in the associations between processes with artificial UV and solar UV, as the natural radiation becomes more attractive and allows the process operating costs reduction.

show abstract

“…The level of BOD 5 52.70 ± 0.17 mg/L and COD 122.20 ± 0.20 mg/L. The ratio of BOD 5 /COD was 0.43, still in the range of 0.30-0.80, indicates that water is easy to decompose naturally [23]. This shows that 43% of Kalidami boezem water is biodegradable, a category of untreated water [24].…”

Section: Initial Characteristics Of Kalidami Boezem Watermentioning

confidence: 99%

Effects of potassium and carbon addition on bacterial algae bioremediation of boezem water

Nurhayati¹,

Ratnawati²,

Sugito³

2018

Environmental Engineering Research

View full text Add to dashboard Cite

Bioremediation of bacterial algae is one of wastewater treatment by utilizing symbiosis of bacterial algae, which is relatively inexpensive and safe for the environment. The aims of this research were: (1) to investigate initial characteristic of boezem water of Kalidami Surabaya, (2) to investigate the effect of potassium (K) element and carbon source addition toward the reduction of NH3-N content and organic matter in KMnO4 of boezem water. The research conducted in a laboratory in batches without adding aeration. The initial stage of this research was conducting alga culture until it was obtained chlorophyll-a algae concentration of 3.5 ± 0.5 mg/L. The best result of range finding test was a comparison of boezem water volume with algal which were about 25%:75%. The research conducted in duplo over 18 d. The result of the research can be concluded that boezem water of Kalidami Surabaya for the parameter of pH, temperature, NH3-N, dissolved oxygen, chemical oxygen demand, biological oxygen demand, and number of KMnO4 show that it enables to do bioremediation of bacterial algae. Decrease efficiency occurred in a reactor with the addition of element K 3% and source C. NH3-N and KMnO4 final content 0.164 mg/L and 30 mg/L, respectively.

show abstract

The "Chemical Oxygen Demand / Total Volatile Acids" Ratio as an Anaerobic Treatability Indicator for Landfill Leachates

Cited by 12 publications

References 34 publications

Bioremediation of Landfill Leachate Using Isolated Bacterial Strains

Bioremediation of Landfill Leachate Using Isolated Bacterial Strains

Utilization of UV‐A and UV‐C radiation in advanced oxidation processes with the intention of removing color and organic matter from the gross leachate of a stabilized sanitary landfill

Effects of potassium and carbon addition on bacterial algae bioremediation of boezem water

Contact Info

Product

Resources

About