Bifunctional Rotating Drum Electrode Device and Method for Treatment of Persistent Organic Pollutants

Technology: Bifunctional Reactor Device;

Industry & Application: Environment Engineering, Waste treatment, Treatment for organic pollutants;

Market: The global small modular reactor market is projected at a CAGR of 3.6% during (2024-2030)

In the present era, the availability of clean potable water at affordable cost is a growing challenge for mankind. To meet the growing demand of drinking water, many materials & methods are used, but having difficulties due to expensive process/implementation, & consumption of high energy.
There are many conventional methods discussed herein does not provide solutions as discussed in the present invention.
Hence, there is a need to address the issues.

Present invention describes a bifunctional reactor device and a method for removal of persistent organic pollutants in water.
The device includes a MoS2-TiO2 coated carbon cloth material as anode and graphene–ferrocene/graphene–hemin coated graphite felt or a combination as cathode.
Each of the electrodes is wrapped in an individual drum, each drum held by a rotating shaft and is configured such that half the drums are submerged in the waste water while the other half is exposed to air.
The feed entering the reactor device forms a liquid thin film on the surface of the electrodes.
The exposed liquid thin film adsorbs oxygen from atmosphere and UV irradiation resulting in effective degradation of organic pollutants adsorbed on the liquid thin film.
Further said invention discloses a process to degrade pollutants in a solution as shown in figure hereinbelow:

Technical Perspective & Industrial Perspective:

Facilitates Clean & Green technology of bifunctional reactor device for the removal of dual phase contaminants.

Types of Electrode Pair used:

a)An anode wrapped around a first nonconductive cylinder, wherein the anode comprises of a carbon cloth coated with an anode composite to a predetermined thickness, the anode composite comprising 25 to 75 wt.% of molybdenum disulfide and titanium oxide. b)A cathode wrapped around a second nonconductive cylinder, wherein the cathode comprises of a graphite felt coated with a cathode composite to a predetermined thickness, the cathode composite comprising graphene-ferrocene, graphene-hemin or a combination thereof, wherein graphene content present in the cathode composite is at least 99%.
Electrode Arrangement: The anode & the cathode arranged in a dual rotating drum configuration configured to rotate about their individual axes comprising a first rotating shaft coupled to a first motor & a second rotating shaft coupled to a second motor; and a UV source configured to uniformly irradiate the surface of the cathode & the anode.
Removing Cations & Anions &positive-negative charges in approximately in the range of 0.1 to 10Hours, depending on the embodiment of the .

Efficiency:

The device & method work over a wide pH range, & achieve a removal efficiency of at least 90%
Cost-effective & Plug & Play system, provides single solution & applicable in the domestic/Industrialist area.

Prof. Indumathi Nambi

Department of Civil Engineering

TRL-4

Proof of Concept ready, tested in lab.

Technology Transfer