BacTech Additional Patent Filing

BacTech Environmental Files Provisional

Patent of Zero-Waste Tech Beyond

Bioleaching

Builds on patent filed in April for Pyrrhotite Process

June 18, 2025

Toronto, Canada

BacTech Environmental Corporation (“BacTech” or the “Company”) (CSE:

BAC, OTCQB: BCCEF) announced today that it has filed a provisional patent

application to expand its zero-waste processing technology beyond bioleaching.

This new application builds on a full patent application submitted in April, which

focused on treating iron and acid streams from bioleaching. The Company

considers this development to have the potential to improve mineral processing

operations by enabling the recovery of materials from waste, which may

contribute to more sustainable practices.

Over the next year, BacTech will seek potential industry partners to test and

develop this technology across different platforms, with the goal of moving toward

a full patent.

Acidic iron streams are a common by-product of mineral processing. These are

usually treated to neutralize acidity, often creating waste sludge. BacTech’s zero-

waste method offers a new way to treat these streams by recovering valuable

materials and turning iron and acid into marketable products.

Instead of using traditional neutralizing materials, BacTech’s patented process uses

ammonia, which is gaining importance in the green economy. This method allows

for the production of clean, usable iron and fertilizer products and helps recover

other valuable, contained metals.

Using ammonia requires smaller amounts of neutralizing agent and less

infrastructure. BacTech’s process also helps conserve water, preventing it from

getting trapped in sludge. The treated water is cleaner and easier to manage

according to environmental standards.

This next generation of BacTech’s zero-waste processing technology does not rely

on bioleaching and is possibly suitable for a wide range of mineral processing

applications aimed at recovering iron and acid from waste streams. The technology

potentially can be retrofitted to various types of operations, including copper and

nickel sulphide processing, nickel laterite processing, heap and dump leaching for

base metal recovery, heavy mineral sands processing, phosphoric acid production,

rare earth element leaching, manganese and uranium leaching, as well as refractory

gold pressure oxidation and oxidative leach processes.

The technology can also potentially treat ongoing acidic runoff from old mine

sites. BacTech’s method turns these waste streams into valuable products like iron

and fertilizer, while also producing clean water. This is a major improvement over

methods that result in waste that must be managed long-term.

In addition, BacTech’s innovation has the potential to unlock new heap leaching

opportunities for low-grade metal recovery that were previously deemed

uneconomical. Historically, such processes were inhibited by the generation of

large volumes of acidic, iron-laden solutions that required costly neutralization

with lime or limestone and extensive waste impoundment. This limitation has been

especially problematic for the pre-treatment heap leaching of low-grade refractory

gold ores prior to gold extraction, due to the prohibitive costs associated with

managing soluble iron and acid using traditional reagents

Finally, BacTech’s approach opens the door to economically recovering metals

from low-grade ores that were previously considered uneconomical. In the past,

treatment was limited by the need to manage large volumes of acidic, iron-rich

solutions. BacTech’s technology reduces these challenges and makes it easier to

recover metals from more sources.

About BacTech Environmental Corporation

BacTech Environmental Corporation is a company that specializes in environmental

technology. We use a process called bioleaching to recover metals like gold, silver,

cobalt, nickel, and copper, while also safely removing harmful contaminants like

arsenic. This process is eco- friendly and uses naturally occurring bacteria that are

safe for both humans and the environment. By using our proprietary method of

bioleaching, we can neutralize toxic concentrates and tailings while also creating

profitable opportuni ties. Recently BacTech filed a patent on the treatment of

pyrrhotite tailings producing magnetite, organic fertilizer and critical metals. The

company is publicly traded on several stock exchanges, including the CSE, OTCQB,

and Frankfurt Stock Exchange.

For further information contact:

Ross Orr

President & CEO, BacTech Environmental Corporation

416-813-0303 ext. 222,

Email: [email protected]

Website: https://bactechgreen.com/

Investor Presentation: https://bactechgreen.com/investors/

Follow us on:

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Vimeo http://vimeo.com/bactechgreen

YouTube https://www.youtube.com/channel/UCBgXr3ej2_BMOtoeFoKIgEg

Special Note Regarding Forward-Looking Statements

This news release contains “forward-looking information”, which may include, but

is not limited to, statements with respect to future tailings sites, sampling or other

investigations of tailing sites, the Company’s ability to make use of infrastructure

around tailings sites or operating performance of the Company and its projects.

Often, but not always, forward- looking statements can be identified using words

such as “plans”, “expects”, “is expected”, “budget”, “scheduled”, “estimates”,

“forecasts”, “intends”, “anticipates”, or believes” or variations (including negative

variations) of such words and phrases, or state that certain actions, events or results

“may”, “could”, “would”, “might” or “will” be taken, occur or be achieved.

Forward-looking statements involve known and unknown risks, uncertainties and

other factors which may cause the actual results, performance, or achievements of

the Company to be materially different from any future results, performance or

achievements expressed or implied by the forward -looking statements. Forward -

looking statements contained herein are made as of the date of this news release and

the Company disclaims, other than as required by law, any obligation to update any

forward-looking statements whether because of new information, results, future

events, circumstances, or if management’s estimates or opinions should change, or

otherwise. There can be no assurance that forward-looking statements will prove to

be accurate, as actual results and future events could differ materially from those

anticipated in such statements. Accordingly, the reader is cautioned not to place

undue reliance on forward-looking statements.

The Canadian Securities Exchange (CSE) has not reviewed and does not accept

responsibility for the adequacy or the accuracy of the contents of this release.