Cover Image

Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption

Partially stabilized leachate is known to contain contaminants harmful to the environment. The combined physicochemical treatment was generally used to treat these recalcitrant However, the existing technology is still unsatisfactory to fulfil strict discharge limits and is subjected to various oper...

Full description

Saved in:
Bibliographic Details
Main Author: Lennevey, Kinidi
Format: Thesis
Language:English
Published: UNIMAS 2022
Subjects:
TA Engineering (General). Civil engineering (General)
TD Environmental technology. Sanitary engineering
TP Chemical technology
Online Access:http://ir.unimas.my/id/eprint/38712/3/Lennevey.pdf
http://ir.unimas.my/id/eprint/38712/
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.unimas.ir.38712
record_format eprints
spelling my.unimas.ir.387122024-08-13T02:37:15Z http://ir.unimas.my/id/eprint/38712/ Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption Lennevey, Kinidi TA Engineering (General). Civil engineering (General) TD Environmental technology. Sanitary engineering TP Chemical technology Partially stabilized leachate is known to contain contaminants harmful to the environment. The combined physicochemical treatment was generally used to treat these recalcitrant However, the existing technology is still unsatisfactory to fulfil strict discharge limits and is subjected to various operational issues. This thesis aims to evaluate the effectiveness of combining ammonia stripping and subsequent acidification as a pre-treatment for GAC adsorption and also evaluate the impact of ammonia removal efficiency on the economic cost of the full-scale ammonia stripping system. The partially stabilized leachate was characterized by a high COD (2800 mg/L), UV254 (15.92), and ammonia (920 mg/L) concentration. A response surface methodology (central composite design) was used to optimize the variables such as pH (9-12), air to water ratio (5-10L/Air/min/L-Leachate), and temperature (30-60 oC) for the lab-scale diffused ammonia stripper. Then, the effect of lime (from the ammonia stripping process) and acidification for optimization GAC adsorption was evaluated by varying the lime dosage (0 to 20 g/L) and pH (2 to 12), respectively. Next, the equilibrium isotherms and kinetics of the adsorption process were investigated. Finally, the economic feasibility of the proposed treatment was conducted using Aspenplus®. The optimization process using RSM for the diffused ammonia stripper had predicted the optimum condition for ammonia removal, corresponding to 95.6% ammonia removal. The acidification after lime treatment has significantly improved the adsorption of organics (COD) by more than 90%, showing a significant improvement in the adsorption performance by using the granular activated carbon. The equilibrium and kinetic adsorption follow the Redlich-Peterson isotherms (R2: 0.99902) and pseudo-second-order degree kinetics (R2: 0.993-0.998) The economic optimums for the ammonia stripping and absorption process scale-up simulation were found to be at RM338.66/kg (79.60 US$/kg) of ammonia removed at ammonia concentration of 244 ppm with 95% removal efficiency at an operating temperature of 60 oC. In conclusion, these results demonstrate that the combined process is an effective treatment for the treatment of partially stabilized leachate in complying with strict discharge limits. UNIMAS 2022-06-22 Thesis NonPeerReviewed text en http://ir.unimas.my/id/eprint/38712/3/Lennevey.pdf Lennevey, Kinidi (2022) Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption. PhD thesis, UNIVERSITI MALAYSIA SARAWAK.
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic TA Engineering (General). Civil engineering (General)
TD Environmental technology. Sanitary engineering
TP Chemical technology
spellingShingle TA Engineering (General). Civil engineering (General)
TD Environmental technology. Sanitary engineering
TP Chemical technology
Lennevey, Kinidi
Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption
description Partially stabilized leachate is known to contain contaminants harmful to the environment. The combined physicochemical treatment was generally used to treat these recalcitrant However, the existing technology is still unsatisfactory to fulfil strict discharge limits and is subjected to various operational issues. This thesis aims to evaluate the effectiveness of combining ammonia stripping and subsequent acidification as a pre-treatment for GAC adsorption and also evaluate the impact of ammonia removal efficiency on the economic cost of the full-scale ammonia stripping system. The partially stabilized leachate was characterized by a high COD (2800 mg/L), UV254 (15.92), and ammonia (920 mg/L) concentration. A response surface methodology (central composite design) was used to optimize the variables such as pH (9-12), air to water ratio (5-10L/Air/min/L-Leachate), and temperature (30-60 oC) for the lab-scale diffused ammonia stripper. Then, the effect of lime (from the ammonia stripping process) and acidification for optimization GAC adsorption was evaluated by varying the lime dosage (0 to 20 g/L) and pH (2 to 12), respectively. Next, the equilibrium isotherms and kinetics of the adsorption process were investigated. Finally, the economic feasibility of the proposed treatment was conducted using Aspenplus®. The optimization process using RSM for the diffused ammonia stripper had predicted the optimum condition for ammonia removal, corresponding to 95.6% ammonia removal. The acidification after lime treatment has significantly improved the adsorption of organics (COD) by more than 90%, showing a significant improvement in the adsorption performance by using the granular activated carbon. The equilibrium and kinetic adsorption follow the Redlich-Peterson isotherms (R2: 0.99902) and pseudo-second-order degree kinetics (R2: 0.993-0.998) The economic optimums for the ammonia stripping and absorption process scale-up simulation were found to be at RM338.66/kg (79.60 US$/kg) of ammonia removed at ammonia concentration of 244 ppm with 95% removal efficiency at an operating temperature of 60 oC. In conclusion, these results demonstrate that the combined process is an effective treatment for the treatment of partially stabilized leachate in complying with strict discharge limits.
format Thesis
author Lennevey, Kinidi
author_facet Lennevey, Kinidi
author_sort Lennevey, Kinidi
title Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption
title_short Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption
title_full Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption
title_fullStr Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption
title_full_unstemmed Treatment of Partially Stabilized Landfill Leachate using Combined Ammonia Stripping and GAC Adsorption
title_sort treatment of partially stabilized landfill leachate using combined ammonia stripping and gac adsorption
publisher UNIMAS
publishDate 2022
url http://ir.unimas.my/id/eprint/38712/3/Lennevey.pdf
http://ir.unimas.my/id/eprint/38712/
_version_ 1808981491158351872
score 13.211869

Similar Items