e-journal

Effect of bio-sludge concentration on the efficiency of sequencing batch reactor (SBR) system to treat wastewater containing Pb2+and Ni2+

---

Abstract.
The removal efficiency of sequencing batch reactor (SBR) system with synthetic industrial estatewastewater
(SIEWW) containing Ni2+ or Pb2+ was increased with the increase of mixed liquor suspended solids
(MLSS). But, the sludge volume index (SVI) of the systemwas increased up to higher than 100 mL/g under
MLSS of up to 4000 mg/L. Also, the effluent NO3− was decreased with the increase of MLSS. The heavy
metals (Ni2+ or Pb2+), BOD5, COD and TKN removal efficiencies of SBR system with SIEWW containing 5 mg/L heavy metal (Ni2+ or Pb2+) under MLSS of 3000 mg/L were 83–85%, 96–97%, 95–96% and 83–94%, respectively. The increase of heavy metal (Ni2+ or Pb2+) concentrations of SIEWW from 5 to 50 mg/L were not significantly effected to both COD and BOD5 removal efficiencies (they were reduced by only 4–5%), but they were strongly effected to both TKN and heavy metals removal efficiencies (they were reduced by 15 and 20–30%, respectively). Both Ni2+ and Pb2+ could repress the growth of both nitrification and denitrification bacteria. And Ni2+ was more effective than Pb2+ to reduce the heavy metals removal efficiency. The SBR system could be applied to treat the industrial estate wastewater (IEWW) containing both Pb2+ and Ni2+ even the heavy metals concentrations was up to 5 mg/L, but the removal efficiency was quite low and excess bio-sludge did not produce. However, the system efficiency could be increased with the increase of BOD5 concentration of the wastewater. The Pb2+, Ni2+, COD, BOD5 and TKN removal efficiencies of the system with IEWW containing 500 mg/L BOD5, 5 mg/L Ni2+ and 5 mg/L Pb2+ under HRT of 3 days were 85.68±0.31%, 87.03±0.21%, 86.0±0.5%, 94.04±0.4% and 90.5±0.9%, respectively. And the effluent SRT, SS and SVI of the system were 44.7±0.6 days, 150±6 mg/L and 100 mL/g, respectively.

Keywords:
Sequencing batch reactor (SBR)
Mixed liquor suspended solids (MLSS)
Pb2+
Ni2+
Denitrification
Nitrification

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

-

Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 166 (2009) 356–364

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

LINGKUNGAN HIDUP

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar