Chemical oxidation for the treatment of leachate-process comparison and results from full-scale plants

1997 ◽  
Vol 35 (4) ◽  
pp. 249-256 ◽  
Author(s):  
Martin Steensen
Keyword(s):  
Hydrogen Peroxide ◽  
Energy Consumption ◽  
Landfill Leachate ◽  
Biological Treatment ◽  
Fixed Bed ◽  
Chemical Oxidation ◽  
Full Scale ◽  
Organic Substances ◽  
Process Comparison ◽  
Uv Ozone

Before landfill leachate is discharged, extensive removal of organic substances is required which cannot be achieved by biological treatment only. Chemical oxidation has the advantage of the substances being almost completely converted. Hydrogen peroxide/UV, ozone and ozone/fixed bed catalyst processes were used for the purification of three biologically pre-treated leachates. With all processes sufficient purification levels were achieved. However, the required energy consumption is largest with the hydrogen peroxide/UV process. If chemical oxidation is combined with biological purification, the discharge quality can be increased at decreased oxidant consumption.

scholarly journals Scaling-Up and Long-Term Operation of a Full-Scale Two-Stage Partial Nitritation-Anammox System Treating Landfill Leachate

Processes ◽  
2021 ◽  
Vol 9 (5) ◽  
pp. 800
Author(s):  
Albert Magrí ◽  
Maël Ruscalleda ◽  
Albert Vilà ◽  
Tiago R. V. Akaboci ◽  
M. Dolors Balaguer ◽  
...  
Keyword(s):  
Landfill Leachate ◽  
Research Group ◽  
Biological Treatment ◽  
Scale Up ◽  
Full Scale ◽  
Landfill Site ◽  
Two Stage ◽  
Partial Nitritation ◽  
N Removal

(1) Background: Biological treatment of leachate in landfill sites using anaerobic ammonium oxidation (anammox) is challenging because of the intrinsic characteristics of this complex wastewater. In this work, the scale-up and subsequent full-scale implementation of the PANAMMOX® technology (LEQUIA Research Group, Girona, Catalonia, Spain) are presented as a case study to achieve long-term nitrogen (N) removal from mature leachate mostly through a completely autotrophic pathway. (2) Methods: The treatment system consists of two sequencing batch reactors (SBRs) running in series to individually operate partial nitritation (PN) and anammox (A). Following biological treatment, physicochemical oxidation (i.e., Fenton-based process) was used to remove the remaining non-biodegradable organic matter. A cost analysis comparative was conducted in relation to the former technology used on-site for treating the leachate. (3) Results: The scale-up of the process from pilot- to full-scale was successfully achieved, finally reaching an average removal of 7.4 kg N/d. The composition of the leachate changed over time, but especially once the landfill site stopped receiving solid waste (this fact involved a marked increase in the strength of the leachate). The adjustment of the alkalinity-to-ammonium ratio before feeding PN-SBR helped to improve the N-removal efficiency. Values of conductivity above 25 mS/cm in A-SBR could negatively affect the performance of the anammox process, making it necessary to consider a dilution strategy according to the on-line monitoring of this parameter. The analysis of the operational costs showed that by implementing the PANAMMOX® technology (LEQUIA Research Group, Girona, Catalonia, Spain) in the landfill site, savings up to 32% were achievable. (4) Conclusions: Treatment of mature landfill leachate in such a two-stage PN-A system was demonstrated as feasible and economically appealing despite the complexity of this industrial wastewater. Accurate expert supervision of the process was a key factor to reaching good performances.

scholarly journals Case study : advanced integrated in situ technologies outperform traditional remediation techniques

2017 ◽  
Author(s):  
Kristin Forsberg
Keyword(s):  
Hydrogen Peroxide ◽  
Armed Forces ◽  
Petroleum Products ◽  
Chemical Oxidation ◽  
Full Scale ◽  
Pilot Test ◽  
In Situ Chemical Oxidation ◽  
Target Values ◽  
Remediation Process

RGS 90 has been commissioned by the Swedish Armed Forces to remediate a large fuel storage facility servicing the military. The facility housed a variety of petroleum products for over 40 years and several documented release incidents resulted in the contamination of a 50,000 m2 area. The largest known event occurred in 1958, where an explosion caused the release of 14,000 m3 of various petroleum products. During the clean-up, only 8,000 m3 of the product was recovered while an estimated 6,000 m3 reached the surrounding environment. The client initially proposed a remedial strategy consisting of biosparging and in-situ chemical oxidation using hydrogen peroxide; however, RGS 90 found these methods to be unsuitable for this site due to the geology of the area, which consists of impermeable and heterogeneous dense, rocky moraine. There are also safety risks and environmental hazards associated with the use of hydrogen peroxide. RGS 90 suggested an alternative method which was accepted by the Swedish Armed Forces and a pilot test was carried out in 2012. The results from the pilot tests confirmed that the use of ORC-Advanced and RegenOx would successfully remediate the extensive TPH contamination at the site. The data gathered from this pilot test allowed RGS 90 to refine and optimize the proposed full-scale treatment of the wider plume. The full scale remediation process started in December 2013 in area C and D. Sampling 6 month after injection shows that the target values have been achieved in almost all sampling points. During summer and autumn 2014, RGS 90 are planning for the full scale remediation process of the remaining areas, (B1-B3). The plan is to inject RegenOx and ORC-Advanced into the ground and groundwater and use multiphase extraction in the areas, where free phase product has been observed during the initial groundwater sampling.

Combined quantity management and biological treatment of sludge liquor at Hamburg's wastewater treatment plants - first experience in operation with the Store and Treat process

2004 ◽  
Vol 50 (7) ◽  
pp. 49-52
Author(s):  
F. Laurich
Keyword(s):  
Wastewater Treatment ◽  
Energy Consumption ◽  
Nitrogen Removal ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Full Scale ◽  
Process Waste ◽  
Reduce Energy Consumption

Store and Treat (SAT) is a new concept for the management of ammonium-rich process waste aters at wastewater treatment plants. It combines the advantages of quantity management and separate biological treatment, whereby both operations are carried out in the same tank. Now the first full-scale application of that method was realized in Hamburg. As first experience shows the process can help to increase nitrogen removal and to reduce energy consumption.

CHEMICAL OXIDATION OF TREATED TEXTILE EFFLUENT BY HYDROGEN PEROXIDE AND FENTON PROCESS

2010 ◽  
Vol 9 (3) ◽  
pp. 351-360 ◽  
Author(s):  
Abdelnaser Omran ◽  
Hamidi Abdul Aziz ◽  
Marniyanti Mamat Noor
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Oxidation ◽  
Textile Effluent ◽  
Fenton Process

Energy savings potential of new aeration system: Full scale trials

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
A. Lazić ◽  
V. Larsson ◽  
Å. Nordenborg
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Total Energy ◽  
Energy Savings ◽  
Treatment Plant ◽  
Full Scale ◽  
Total Energy Consumption ◽  
Aeration System ◽  
Fine Bubble ◽  
Aeration Control

The objective of this work is to decrease energy consumption of the aeration system at a mid-size conventional wastewater treatment plant in the south of Sweden where aeration consumes 44% of the total energy consumption of the plant. By designing an energy optimised aeration system (with aeration grids, blowers, controlling valves) and then operating it with a new aeration control system (dissolved oxygen cascade control and most open valve logic) one can save energy. The concept has been tested in full scale by comparing two treatment lines: a reference line (consisting of old fine bubble tube diffusers, old lobe blowers, simple DO control) with a test line (consisting of new Sanitaire Silver Series Low Pressure fine bubble diffusers, a new screw blower and the Flygt aeration control system). Energy savings with the new aeration system measured as Aeration Efficiency was 65%. Furthermore, 13% of the total energy consumption of the whole plant, or 21 000 €/year, could be saved when the tested line was operated with the new aeration system.

TREATABILITY OF 2,4-D PRODUCTION WASTEWATERS

1994 ◽  
Vol 30 (3) ◽  
pp. 73-78 ◽  
Author(s):  
O. Tünay ◽  
S. Erden ◽  
D. Orhon ◽  
I. Kabdasli
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Sludge ◽  
Partial Oxidation ◽  
Chloride Concentration ◽  
Chemical Oxidation ◽  
Cod Removal ◽  
Optimum Conditions ◽  
Organic Loading ◽  
Activated Sludge System ◽  
Biological Treatability

This study evaluates the characterization and treatability of 2,4-D production wastewaters. Wastewaters contain 20000-40000 mg/l COD, 17000-30000 mg/l chloride and pH is around 1.0. Chemical oxidation with hydrogen peroxide provided almost complete COD removal. The optimum conditions are 3:1 H2O2/COD oxidant dosage, 3000 mg/l Fe3+ as catalyst and pH 3. Partial oxidation at 0.5:1 H2O2//COD ratio is also effective providing 67% COD removal. A batch activated sludge system is used for biological treatability. Dilution is needed to maintain a tolerable chloride concentration which increases through COD removal. pH also increased during COD removal. 85% COD removal is obtained for the 50% dilution at an organic loading of 0.3 day‒1 on a COD basis. Completely and partially oxidized wastewaters are also treated in the activated sludge down to 30 mg/l BOD5.

Evaluation of treatability for two textile mill effluents

1999 ◽  
Vol 40 (1) ◽  
pp. 145-152 ◽  
Author(s):  
F. Germirli Babuna ◽  
B. Soyhan ◽  
G. Eremektar ◽  
D. Orhon
Keyword(s):  
Experimental Investigation ◽  
Biological Treatment ◽  
Chemical Oxidation ◽  
Domestic Sewage ◽  
Hydrolysis Rate ◽  
Textile Mill ◽  
Acrylic Fiber ◽  
Partial Chemical

The study emphasizes wastewater characteristics of two different textile plants as they apply to biological treatment. Although conventional characterization reveals no major differences, the effluents from the acrylic fiber and yarn dyeing plant exhibit all the properties of a non-biodegradable wastewater. Appropriate pretreatment consisting of partial chemical oxidation with H2O2 reduces its COD content to 700 mg l−1, almost entirely biodegradable whereas COD fractionation indicates that the effluents of the cotton knit dyeing plant contain 9% residual fractions. Experimental investigation shows that most kinetic and stoichiometric properties of both wastewaters are compatible with that of domestic sewage with the exception of a much slower hydrolysis rate.

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