Efficiency of combined process of ozone and bio-filtration in the treatment of secondary effluent.

Abstract:

:The present work was aimed at studying the efficiency of the combined process of biofiltration with ozonation to improve the quality of secondary effluent. The secondary effluent from the Dinapur Sewage Treatment Plant Varanasi, India was used in this work. The process of biofiltration with the plant species of Eichornia crassipes and Lemna minor, at a flow rate of 262 ml min(-1) and plant density of 30 mg L(-1) for 48 h, in combination with the process of ozonation with ozone dose of 10 mg L(-1) and contact time of 5 min was applied. Results revealed that combined process was statistically most suitable for the highest degradation of physico-chemical and microbial parameters with improving BDOC value. The biofiltration process is able to remove highest percentage of toxic heavy metals from the secondary effluent without production of toxicity. This technique is highly recommendable for tropical wastewater where sewage is mixed with industrial effluents.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Tripathi S,Tripathi BD

doi

10.1016/j.biortech.2011.04.035

subject

Has Abstract

pub_date

2011-07-01 00:00:00

pages

6850-6

issue

13

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(11)00529-3

journal_volume

102

pub_type

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