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Using Photonics To Clean Waste Water

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Alpes Lasers and partners create ultrafast quantum cascade laser-based sensor to detect oil and suspended particles in water

Researchers from Swiss engineering firm, Alpes Lasers has teamed up with a group of oil industry partners and academic institutes to create an ultrafast quantum cascade laser-based sensor designed to make toxic wastewater harmless by detecting the tiniest concentrations of oil and suspended solids in water.

Using hyperspectral imaging, the sensor will detect microscopic pathogens that are indistinguishable to the human eye or conventional imaging methods. And by improving its detection rate using AI and machine learning, this new laser system can continuously monitor water in a live setting, with no need for sampling or preparation.

Oil Processing

Harmful 'wastewater' by-products are created particularly when naturally-occurring 'crude oil' is, processed, distilled and refined to make new, useful fuels like diesel, kerosene, and liquefied petroleum.

Producing cooling water, process water, stormwater, and sanitary sewage waters, oil refineries have sought to reduce the number of dangerous by-products by monitoring the wastewaters at critical stages in their refining processes. This new light-based analyser looks to place fewer pollutants into the environment during oil refining while simultaneously optimising core processes in water extraction from crude oil by 10 percent.

Although sophisticated techniques at present use acoustics to identify all the constituents in crude oil, some dangerous elements may still be present in wastewater.

Frequency Combs

Aiming to give Europe a global competitive lead in oil refining, the European consortium HYDROPTICS is developing the most sensitive and one of the first water analysers to use quantum cascade laser frequency combs, which are currently deployed in spectroscopy applications.

Project coordinator, Antoine Muller said: “The HYDROPTICS project is creating a highly accurate oil-in-water analyser based on cutting edge mid-IR light sources and spectroscopy techniques.

“Our highly sensitive analyser will optimise several critical stages in oil production as well as control downstream processing routines for final mineral oil product development.

“Frequency comb quantum cascade laser source will enable scientists to rapidly measure the area of the absorption peak related to deformation vibration of the methyl groups.”

Rapid Processing

At present, quantum cascade lasers can be used to measure the oil content in water. However, this requires a reference sample that can take several hours to prepare and deliver a result.

This new HYDROPTICS device can deliver measurements in minutes. Project coordinator, Sargis Hakobyan said: “Our scientists at HYDROPTICS are using two lasers to continuously monitor the oil-in-water content for long periods, which is not possible with current techniques that use a single laser.

“We are also developing machine learning techniques to collect and analyse data to refine the extraction process.

The EU is the second-largest producer of petroleum products in the world after the United States, with a crude refining capacity of about 15 million barrels per day, representing 16% of total global capacity.

“Our novel, ultrasensitive oil-in-water on-line analyser will mean Europe will gain a significant industrial lead.

“Essentially, HYDROPTICS will enable Europe's oil industry to have a better yield with less waste, to have a by-product we can re-use while having a positive environmental impact.

“The positive innovation and environmental implications of our technology mean we can help address a significant Societal Challenge in smart, green technology,” said Hakobyan.

Fluid Analysis

The consortium sees the long term implications of HYDROPTICS being tailored to any industry that needs to perform molecular detection in liquids or gases.

Hakobyan said: "We expect industries that are looking to perform highly sensitive analyses of liquids or gases to benefit from HYDROPTICS: surface water monitoring for phosphate/nitrate contamination; milk analysis for protein/fat concentration and early-warning systems for accidental or deliberate contaminations".

The consortium expects to have a prototype ready by 2023. Muller said: “We expect to test a working prototype that will be installed in an oil refinery business with our two partners in Austria and Turkey in a love setting. All parts of the prototype will be verified by each corresponding partners labs.”

HYDROPTICS is coordinated in Switzerland by the company Alpes Lasers (Neuchâtel, Switzerland) and is comprised of 10 partners, including Quantared Technologies (AT), IRsweep (CH), DBC Europe (BE), OMV Exploration & Production GmbH (AT), Turkiye Petrol Rafinerileri Anonim Sirketi (TR); Technische Universitaet Wien (AT), Interuniversity Microelectronics Centre (BE), Silicon-Austria Labs (AT), and National Technical University of Athens - NTUA (EL).



2nd November 2020 - 10am GMT (Live event)
4th November 2020 – 10am CTT (Recorded)
6th November 2020 – 10am PST (Recorded)


Following on from the successful launch of the virtual AngelTech Online Summit in May 2020, we are delighted to announce AngelTech Live II, taking place on 2 November 2020. AngelTech will once again consist of our established events of CS International and PIC International.

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