An integrated bioaugmentation/electrocoagulation concept for olive mill wastewater management and the reuse in irrigation of biofuel plants

a pilot study

Hesham M. Abdulla, Sahar A. El-Shatoury, Abeer A. El-Shahawy, Safaa A. Ghorab, Mahmoud Nasr, Martha E. Trujillo

Research output: Contribution to journalArticle

Abstract

A consortium of highly degrading microorganisms was used in an integrated bioaugmentation/electrocoagulation process for treating olive mill wastewater. The system was investigated for treating 1 m3 day−1, at a pilot scale, for 2 years; hydraulic loading rate and organic loading rate were 2880 l m−2 day−1 and 37,930 g COD m−2 day−1, respectively. Average removal efficiency for COD, oils, and total phenols was 63.9%, 85.2%, and 43.6%, respectively. The olive mill consortium, OMC, consisted of seven actinomycete strains. The strains were confirmed, by 16S rDNA analysis, to belong to five Streptomyces, one Kitasatospora, and one Micromonospora strains, at 100–99.06% similarities. Hydrolytic enzyme activities of OMC strains were remarkably higher for degrading cellulosic and lipid constituents (enzyme-cumulative indices, 14–16.1), than the phenolic constituents (indices, 4.1–6.5). The establishment of actinomycetes in the treatment system was indicated by their increased counts in the biofilm at the end of the biofilter, reaching 13-fold higher than that in the control bed. The treated effluent was toxic to the seedlings of Jatropha curcas (Jatropha) and Simmondsia chinensis (Jojoba). Though its application in irrigation of 3-year-old Jatropha shrubs, significantly, enhanced the fruit yield up to 1.85-fold higher than the control, without affecting the seed oil content, after 3-month application, the irrigated soil showed insignificant changes in its biochemical properties. This developed bioaugmentation/electrocoagulation process can treat wastewater with extremely high organic strength, while its approximate construction and operational costs are limited to 0.03 and 0.51 US$ m−3, respectively. It produces a treated effluent that can be reused in irrigation of specific plants. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)15803-15815
Number of pages13
JournalEnvironmental Science and Pollution Research
Volume26
Issue number16
DOIs
Publication statusPublished - 1 Jun 2019

Fingerprint

Jatropha
Electrocoagulation
Biofuels
Olea
Waste Water
Irrigation
biofuel
Wastewater
mill
Actinobacteria
irrigation
effluent
fold
wastewater
oil
Oils
Micromonospora
enzyme activity
biofilm
phenol

Keywords

  • Actinomycetes
  • Bioaugmentation
  • Electrocoagulation
  • Jatropha curcas
  • Olive mill wastewater

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

An integrated bioaugmentation/electrocoagulation concept for olive mill wastewater management and the reuse in irrigation of biofuel plants : a pilot study. / Abdulla, Hesham M.; El-Shatoury, Sahar A.; El-Shahawy, Abeer A.; Ghorab, Safaa A.; Nasr, Mahmoud; Trujillo, Martha E.

In: Environmental Science and Pollution Research, Vol. 26, No. 16, 01.06.2019, p. 15803-15815.

Research output: Contribution to journalArticle

Abdulla, Hesham M. ; El-Shatoury, Sahar A. ; El-Shahawy, Abeer A. ; Ghorab, Safaa A. ; Nasr, Mahmoud ; Trujillo, Martha E. / An integrated bioaugmentation/electrocoagulation concept for olive mill wastewater management and the reuse in irrigation of biofuel plants : a pilot study. In: Environmental Science and Pollution Research. 2019 ; Vol. 26, No. 16. pp. 15803-15815.
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