Examensarbeten

Beskrivning:

Syvab owns and operates Himmerfjärdsverket, which is a modern, high-tech wastewater treatment plant. At Syvab we are responsible for treating the wastewater from our connected municipalities; Botkyrka, Huddinge, Nykvarn, Salem, Södertälje and Stockholm. We work actively to extract utility from our sewers to reduce resource and energy consumption. It is a constant challenge and our ambition is to not only be an early adopter, but also to be a pioneer within our industry.

In 2020, a comprehensive project which goes by the name “NKH” (Nya Krav Himmerfjärdsverket) was initiated with the goal to be able to meet new effluent criteria and to expand the treatment capacity. In parallel, a pilot plant with the future process configuration, Membrane BioReactor (MBR), has been constructed and was recently commissioned. In the pilot, the incoming wastewater is step-fed to three consecutive biological treatment cascades. Furthermore, methanol can be added in the anoxic zones to support denitrification. This will be instrumental to meet the future effluent requirements.

The aim of this thesis project is to increase the knowledge regarding how and where carbon source should be distributed to the three cascades in order to a) maintain acceptable denitrification and b) to limit the consumption of fossil methanol. This will be investigated partly by process simulation of different scenarios for step-feeding and through selection of dosing point of methanol. The scenarios will be rendered in collaboration with our R&D partner, IVL Swedish Environmental Research Institute. The most promising scenarios will then be evaluated in practical experiments on site at the pilot plant.

We seek you who are about to finish your master's degree. Through your studies, you should have gained basic knowledge about municipal wastewater treatment and the associated biological processes. You like to solve problems, both theoretical and of a more practical nature. Experience of process simulations and specific knowledge of the MBR process could also be to your advantage in the screening process.

The thesis project will mainly be carried out at Himmerfjärdsverket in Grödinge under the supervision of Syvab's process engineers Ross Roberts and Victor Kårelid.

Does this sound interesting?

We look forward to reading your application! Screening and interviews will be done on an ongoing basis. Send your application to info@syvab.se. Please attach your CV and use subject “Exjobb VT2021”.

Deltagande organisationer:

Syvab

IVL Svenska Miljöinsitutet

Kontaktperson:

Victor Kårelid

victor.karelid@syvab.se

073-209 56 21

Sista ansökningsdag:

2021-03-14

Preliminärt startdatum:

Feb/mars 2021