000 04235nas|a2200421 i 4500
005 20260817173446.0
008 030411s2002 th uu m rtt 00| a1eng d
035 _a.b11881161
099 9 _aAIT Thesis no. EV-02-19
100 0 _aParinya Nilwatcharaporn
245 1 0 _aComparison of leachate treatment by an enhanced activated sludge treatment and leachate re-circulation
260 _aBangkok :
_bAsian Institute of Technology,
_c2002
300 _a58 leaves :
_bill.
490 1 _aThesis ;
_vno. EV-02-19
502 _aThesis (M.Eng.) - Asian Institute of Technology, 2002
500 _aA thesis submitted in partial fulfillment the requirements for the degree of Master of Engineering. School of Environment, Resources and Development
520 _aLaboratory experiments were carried out to reveal the characteristics of Saraburi landfill leachate and its biodegradability. It was found that the leachate is suitable for biological treatment but deficient in phosphorus. The biodegradable fraction and nutrient limitation were presented in term of BOD: COD ratio about 0.60 and BOD: N: P ratio about 100: 13 :0.04 respectively. Long te1m BOD dete1mination at different polyphosphate concentration revealed the positive effect of phosphorus dosage in the form of equal amount of K2HP04. However, this effect wasn't obvious when lower the BOD: P ratio to below 100:1.00. The optimum concentration of polyphosphate for aerobic treatment was found by lab-scale experiments using a Sequencing Batch Reactor (SBR) system. Various concentrations of K2HP04 were added and the efficiency of system in term of COD, BOD5 and TKN removal from the effluent of reactors analyzed. The BOD: P ratio about 100:1 was the optimum concentration of K2HP04 because the increasing of the efficiency was presented and maintained when the ratio less than 100: 1.00. the overall enhancement in efficiency reached 86%, 94% and 79% for COD, BOD and TKN removal respectively. As an alternative for leachate treatment leachate re-circulation has been tested. Using landfill simulation reactor with different kind of waste material. Fresh waste, pre-treated waste (2 months composted) and a 50:50 mixture of pre-treated waste with mature compost. Pre-treated waste had a highest potential for treated landfill leachate the efficiency was 78% and 64% for COD removal and BOD removal respectively. While, leachate re-circulation system wasn't significant for nitrogen removal. Composting plus pre-treated waste as well as pre-treated waste, 19% for COD removal and 17% for BOD removal. Nevertheless, fresh waste didn't have potential for used to treat landfill leachate because it didn't have significant of organic removal. The characteristics at the same time of recycling leachate in bioreactor was similar with landfill simulation reactor that used fresh waste, higher contaminated substrates than pretreated waste and mixed waste. This event results from the degree of landfill stabilization.
650 0 _aLeachate
650 0 _aSanitary landfills
_xLeaching
700 1 _aTrankler, Josef,
_eChairperson
700 1 _aVisvanathan, C.,
_eExamination Committee
700 1 _aAnnachhatre, Ajit P.,
_eExamination Committee
710 2 _aMahanakom University of Technology, Thailand,
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. EV-02-19
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B07667
907 _a.b11881161
_bmnait
_cu
902 _a240403
998 _b0
_c030411
_dm
_ea
_fu
_g0
945 _lmnait
945 _lmnait
945 _lmnarc
942 _c20
942 _c40
909 _aBarcode : 30050120706923
_bCREATED : 2001-11-29
_cRECORD # : i12323573
_dLPATRON : 1015516
_eLCHKIN : 2002-08-03
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 1
_jTOT RENEW : 0
909 _aBarcode : 30050120706907
_bCREATED : 2001-11-29
_cRECORD # : i12323585
_dLPATRON : 1015336
_eLCHKIN : 2002-05-25
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 2
_jTOT RENEW : 0
909 _aBarcode : 30050160076708
_bCREATED : 2016-05-24
_cRECORD # : i12990115
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
999 _c19959
_d19959