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Overview

PhD candidate position in Research and application of innovative biofiltration materials in the purification of biogas from hydrogen sulphide

(All your proposals are accepted, when the candidate to PhD offers his / her topic. Then it will be possible to combine with each other. That is, a candidate to PhD with a future doctoral supervisor)

Open application for a doctoral candidate in Environmental Engineering
The doctoral candidate position is available in the faculty of the Environmental Engineering Department of Environmental Protection and Water Engineering. Applicants interested in other research topics related to biofiltration of air pollutants or using different biofiltration materials or environmental technologies are also welcome to apply. (All your proposals are accepted, when the candidate for PhD offers his / her topic. Then it will be possible to combine with each other. That is, a candidate for PhD with a future doctoral supervisor).

Research topic description
Problem
Hydrogen sulphide (H2S) is a hazardous, highly toxic air pollutant. It’s colourless, great unpleasant-smelling, corrosive and flammable gases that severely destroy pipelines, and various devices, degrades the composition of biogas, reduce their calorific value, etc. They consist of many industrial activities, such as oil refining, leather, waste or wastewater treatment, food refining, anaerobic paper and pulp processing, etc. Normally for the removal of H2S from the exhaust stream various chemical and physical methods are used. The focus has been on it several years focused on the use of biofiltration. An attractive air pollutant is used in this process technology due to its efficiency, low energy consumption and minimal formation of secondary products. The gas flow flows through the biofiltration materials. The pollutants are then transferred from the gas phase to biofilm, where they are metabolized by microorganisms. The final biodegradation of air pollutants is CO2, water and microbiological biomass. In the case of H2S biodegradation, sulphur oxidizing bacteria are responsible for the removal of H2S under aerobic conditions and use it as an energy source and CO2 as a major carbon source. Can be used during biofiltration various organic and inorganic biofiltration materials, which make the efficiency of biogas purification from hydrogen sulphide can vary greatly and it is still unclear, which one material or more materials are the most innovative.

Object of research
In the purification of hydrogen sulphide from biogas, it is important to use innovative biofiltration materials that require less energy and cost. Various biogas purifiers are currently being explored around the world methods are used, but ways to clean biogas from harmful impurities are still being sought using reusable and environmentally friendly biofiltration materials and their mixtures.
Work objective
The aim of the research is to investigate and evaluate the efficiency of innovative biofiltration materials in cleaning biogas from hydrogen sulphide.

Work tasks:
1. To estimate the hydrogen sulphide emissions from biogas in selected industrial activities areas;
2. To design an improved design filter for biogas purification from hydrogen sulphide;
3. Apply innovative, reusable materials (pine bark, compost, peat, sludge and wood biochar, etc.) and mixtures thereof;
4. To determine the dependence of hydrogen sulphide purification efficiency on the nature of biofiltration materials, their height and initial pollutant concentrations;
5. To perform modelling of biogas sorption processes in biofiltration materials using software models and compare it with experimental results.

The scientific novelty of the work
Improved design filter for biogas purification from hydrogen sulphide is theoretical, modelling and experimental research using innovative biofiltration materials (pine bark, compost, peat, sludge and wood biochar, etc.) and their mixtures and optimizing the sorption processes of pollutants.

The selected candidate will work on the PhD thesis under the supervision of Prof. dr. Rasa Vaiškūnaitė The successful applicant will have to attend scientific conferences, meetings and internships in the other universities.

Requirements
• Required background: environmental engineering, environmental technologies, chemistry, biotechnology, ecology and others.
• Expected skills and knowledge: Experience in a chemical or biochemical laboratory and the basics of environmental engineering or ecology.
It is a prerequisite you can be present at and accessible to the institution daily.

For more information
Shortlisted candidates will be invited for an interview. The position may not be opened if no qualified candidate is found. Additional information regarding the post may be obtained from Prof. dr. Rasa Vaiškūnaitė, e-mail: rasa.vaiskunaite@vilniustech.lt

Programme structure

The PhD programme consists of:
· Independent research under supervision;
· Courses for PhD students (approximately 30 ECTS credits);
· Participation in research networks, including placements at other, primarily foreign, research institutions;
· Teaching or another form of knowledge dissemination, which is related to the PhD topic when possible;
· The completion of a PhD thesis.

Apply now! Fall semester 2022/23
Application deadline
1 Oct 2022 23:59:59
Eastern European Time
Studies commence
Nov 1, 2022

Application deadlines apply to citizens of: United States

Apply now! Fall semester 2022/23
Application deadline
1 Oct 2022 23:59:59
Eastern European Time
Studies commence
Nov 1, 2022

Application deadlines apply to citizens of: United States