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http://dx.doi.org/10.17576/jsm-2019-4811-09
The Effect of Persulfate
Oxidation on the Biodegradability of Concentrated Anaerobic Stabilized Leachate
(Kesan Pengoksidaan Persulfat
terhadap Keterbiodegredan Pekatan Larut Lesap Anaerob Stabil)
AHMED H.
HILLES1,
SALEM
S.
ABU
AMR2,
ABBAS
F.M.
ALKARKHI*2
& MD SOHRAB HOSSAIN3
1Environment Quality
Authority, Palestinian Authority, Palestine
2Malaysian Institute of
Chemical & Bioengineering Technology, Universiti Kuala Lumpur (UniKL,
MICET), 78000 Melaka, Malaysia
3Division of
Environmental Technology, School of Industrial Technology, Universiti Sains
Malaysia, 11800 Penang, Malaysia
Diserahkan:
3 April 2019/Diterima: 15 Ogos 2019
ABSTRACT
Anaerobic stabilized
landfill leachate was treated by persulfate (S2O82−)
oxidation. The effect of three factors namely; persulfate dosage, pH and
reaction time on COD and NH3-N
removals; was studied. The results of analysis of variance (ANOVA)
showed that the selected factors significantly affected the percentage of COD and
NH3-N removals. Furthermore, the maximum removal was
achieved at 60 min of persulfate oxidation, a COD/S2O82− ratio (1 g/4.2 g), and pH7, the percentage of removals for COD and
NH3-N were 45% and 55%, respectively. The effect of
persulfate oxidation on the biodegradability of leachate was also investigated.
The results showed that the BOD5/COD ratio
improved from 0.09 to 0.1. The oxidation enhanced the biodegradable (CODbi)
from 36% to 57%. Hence, persulfate is suitable to pre-treat highly-concentrated
stabilized leachate. This process should follow the organic degradation and
ammonia removal followed by biological treatment processes.
Keywords: ANOVA;
biodegradability; landfilling leachate; persulfate; Tukey's test
ABSTRAK
Larut lesap stabil anaerob
telah dirawat secara pengoksidaan persulfat ((S2O82−).
Kesan tiga faktor iaitu dos persulfat, pH dan masa tindak balas
terhadap penyingkiran COD dan NH3-N telah dikaji. Ujian ANOVA
menunjukkan faktor tersebut memberi kesan yang bererti
terhadap peratusan penyingkiran COD dan NH3-N.
Seterusnya penyingkiran maksimum COD dan NH3-N
masing-masing sebanyak 45% dan 55% telah dicapai pada masa 60 minit,
nisbah COD/S2O82−
pada 1 g/4.2 g dan pada pH7. Kesan pengoksidaan persulfat
terhadap keterbiodegredan larut lesapan juga dikaji. Hasil kajian
menunjukkan nisbah BOD5/COD meningkat daripada 0.9 kepada 1.0.
Pengoksidaan telah meningkatkan biodegredasi (CODbi)
dari 36% kepada 57%. Dengan ini, persulfat sesuai merawat larut
lesap stabil yang berkepekatan tinggi. Proses ini seharusnya diikuti
dengan degredasi bahan organik dan penyingkiran ammonia melalui
proses rawatan secara biologi.
Kata kunci: ANOVA; keterbiodegredan; larut lesapan; persulfat;
ujian Tukey RUJUKAN
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