Path: TopS2-ThesesChemical Engineering-FTI1999

Pengolahan lindi (Leachate) lahan urug limbah B3 dengan menggunakan sistem kombinasi lumpur aktif-membran.

Master Theses from JBPTITBPP / 2017-09-27 14:51:58
Oleh : Sirin Fairus, S2-Chemical Engineering
Dibuat : 1999-00, dengan file

Keyword : Waste; Toxic waste; Hazardous waste; Reduce toxicity; Hazardous wastes landfills

Waste is a part of human life. Manufacturing and other industrial activities produce toxic and hazardous wastes. This kind of waste should be treated to eliminate or reduce its toxicity, and the small amount that remains should be disposed of in hazardous wastes landfills (secured landfills).
Liquid in contact with stabilized waste in a secured landfill is called leachate. The leachate from hazardous landfills mainly compose recalcitrant organic compounds, ammonia, metals and alkalinity. Therefore, it needs an effective contact process between microorganisms and the substrate to treat biologically. Some efforts could be done by providing long SRT (Solid Retention Time) and HRT (Hydraulic Retention Time) or using high biomass concentration. However, this can cause settling problems such as difficulty in sludge separation in the clarifier. This problem could be overcome by replacing the clarifier unit with a microfiltration membrane especially because its performance does not depend on the characteristic of the sludge from aeration basin. Nevertheles, there are 2 major problems encountered in this membrane filtration unit, i.e. the fouling process and the polarization of concentration which results in flux decreasing. The research was aimed to investigate the capability of the combined system of activated sludge and microfiltration process with backflushing technique to reduce organic carbon and nitrogen compounds in leachate from
hazardous landfills. The experiments included membrane characterization, acclimation, batch and
continuous process. The continuous process was conducted with a 24 hour HRT, and the SRT varied
i.e. 16, 24, and 36 days. The aeration basin volume was 5 L and the membrane filter used was hollow fiber made from polypropilene with pores of 0.2 um in diameter and surface area of 0.025 m2. The batch process achieved its steady state condition over a period of 33 days, the removal of COD, BOD5 and ammonia-N were 51.5 %, 94.3 % and 75.5 %, respectively. The kinetic parameters obtained are as follows: the maxumum specific growth rate constant (uM) : 0.96/day and the saturation substrate constant (Ks) : 16 445.32 mg/l. The great value of Ks noticed that the leachate was not easily biodegraded. The optimum condition obtained from membrane characterization was at the operating TMP (Trans Membrane Pressure) of 0.3 bar and backflushing
applied at 0.6 bar, 1 second long and interval 2 minutes. The continuous process revealed that
system with SRT 32 days was more stable then SRT of 16 and 24 days. The reduction of COD, BOD5 and
ammonia-N were 31.3 %; 66 % and 98 %, respectively. The stable flux was achieved around 5 l/m2.hour

Deskripsi Alternatif :

Waste is a part of human life. Manufacturing and other industrial activities produce toxic and hazardous wastes. This kind of waste should be treated to eliminate or reduce its toxicity, and the small amount that remains should be disposed of in hazardous wastes landfills (secured landfills).
Liquid in contact with stabilized waste in a secured landfill is called leachate. The leachate from hazardous landfills mainly compose recalcitrant organic compounds, ammonia, metals and alkalinity. Therefore, it needs an effective contact process between microorganisms and the substrate to treat biologically. Some efforts could be done by providing long SRT (Solid Retention Time) and HRT (Hydraulic Retention Time) or using high biomass concentration. However, this can cause settling problems such as difficulty in sludge separation in the clarifier. This problem could be overcome by replacing the clarifier unit with a microfiltration membrane especially because its performance does not depend on the characteristic of the sludge from aeration basin. Nevertheles, there are 2 major problems encountered in this membrane filtration unit, i.e. the fouling process and the polarization of concentration which results in flux decreasing. The research was aimed to investigate the capability of the combined system of activated sludge and microfiltration process with backflushing technique to reduce organic carbon and nitrogen compounds in leachate from
hazardous landfills. The experiments included membrane characterization, acclimation, batch and
continuous process. The continuous process was conducted with a 24 hour HRT, and the SRT varied
i.e. 16, 24, and 36 days. The aeration basin volume was 5 L and the membrane filter used was hollow fiber made from polypropilene with pores of 0.2 um in diameter and surface area of 0.025 m2. The batch process achieved its steady state condition over a period of 33 days, the removal of COD, BOD5 and ammonia-N were 51.5 %, 94.3 % and 75.5 %, respectively. The kinetic parameters obtained are as follows: the maxumum specific growth rate constant (uM) : 0.96/day and the saturation substrate constant (Ks) : 16 445.32 mg/l. The great value of Ks noticed that the leachate was not easily biodegraded. The optimum condition obtained from membrane characterization was at the operating TMP (Trans Membrane Pressure) of 0.3 bar and backflushing
applied at 0.6 bar, 1 second long and interval 2 minutes. The continuous process revealed that
system with SRT 32 days was more stable then SRT of 16 and 24 days. The reduction of COD, BOD5 and
ammonia-N were 31.3 %; 66 % and 98 %, respectively. The stable flux was achieved around 5 l/m2.hour

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