Electro-magenetic technique intreatment of pharmaceutical industry wastewater

Dissertant

Ali, Soulafa Amir Muhammad

University

University of Technology

Faculty

-

Department

Department of Building and Construction Engineering

University Country

Iraq

Degree

Ph.D.

Degree Date

2008

English Abstract

Utilizing magnetic technology, factors affecting the efficacy of the magnetic removal of pollutants from a pharmaceutical industry wastewater have been investigated.

An EMT system consisting of magnetic seeding reactor and magnetic separator was designed and constructed for testing the treatment of wastewater having various pollutants such as heavy metals, biological, organic matters, and suspended solids.

As an environmental application, genuine pharmaceutical industry wastewater was treated with the EMT system.

Magnetic treatment of pharmaceutical industry wastewater discharged from Samarra Drugs Factory is given as example of industrial treatment applications in this field.

Magnetic seeding coupled with magnetic separation was applied for the removal of pollutants from this wastewater.

A magnetic seeding process has been adapted to treat it in the first stage of treatment; this was achieved with the help of a ferromagnetic material like magnetite which were successfully synthesized in the laboratory.

A comprehensive study was carried out, involving the effects of pollutants properties (e.g., pollutant concentration and coexisting ions), magnetite dose, magnetite formation, the molar ratio of Fe{III) / Fe (II) and operational parameter, (e.

g., pH, contact time, temperature and mixing speed rate).

The performance of the system is determined by suspended solid, biological materials, organic matters and heavy metal (Iron, copper, zinc and lead) removals.

The result shows appropriate removal efficiency with 85.7 % SS, 99,0 % bacteria, 80.3% oil and grease, 92.26 % zinc, 89.42 % iron, 92.08% copper and 93.53% lead removal, while COD (chemical oxygen demand) is reduced by nearly 67.6 %.

Magnetite (Fe3O4) were effectively used for the removal of zinc (Zn), iron (Fe), copper (Cu) and lead (Pb).

Fe304 particles were also successfully applied for the fast removal of bacterial cell within 15-20 minutes and the removal efficiency reached to 99.0 %, The magnetic particles could be completely recovered for reuse.

I This study concludes that EMT system can improve the pharmaceutical manufacturing wastewater effluent quality.

The chief advantages of magnetic separation process (the second stage of treatment) are that the separation is reversible and potentially selective.

These properties allow for efficient separator regeneration and for the potential recovery and reuse of valuable waste materials.

Five factors investigated have a marked effect on the magnetic separation efficiency.

An increase in magnetic induction from 0.0 to 0.7 T increases the removai efficiency from 0.0 to 96.2 %; a decrease of flow velocity from 1.8E63 to 0.0943 cm/s increases the removal efficiency from 40.21 to 93.0 % ; and a decrease in wire radius from 120 to 50 urn increases the removal efficiency from 53.6 to 96.2 % ; an increase in matrix length from 0 to 20 cm increases the removal efficiency from 20.01 to 97, 21 % ; and an increase in the angle between the wire and the applied magnetic field strength (a) from 30 to 90' increases the removal efficiency from 56, 82 to 95.91 %.

The results have also shown that the electromagnetic treatment method can be used for non-magnetic pollutants by seeding the pharmaceutical industry wastewater with magnetic seeds (magnetite) which preferentially adsorb the pollutants that are to be removed.

With the advantages of high performance, simplicity, and compactness, the magnetic treatment could be an alternative method for wastewater treatment.

Also, results show that EMT is a promising alternative for conventional treatments especially for heavy metals, bacteria and grease and oil.

Finally prototype EMT unit is suggested to be added to the available wastewater treatment unit of Samarra Drug Factory.

Also, the present investigation proposes magnetic separation of the ferritc sludge to recover the ferrites for their possible re-use, Ferrite sludge is separated by magnetic separator and then collected for reuse.

The recovered ferrites may be reused in several industrial applications.

Main Subjects

Civil Engineering

Topics

• Sanitation
• Waste water

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305665