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A team of engineers in Northern Ontario may have just built the machine that ends the septic tank in Canada. Not a better tank, a replacement. A box about the size of a garden shed that sits on top of your lawn, runs on sunlight,
Canadian engineers create a solar-powered machine that replaces septic tanks, cleans wastewater, and works in extreme cold.
Key Takeaways
- Traditional septic tanks are outdated and ineffective in many Canadian environments.
- The new system cleans wastewater thoroughly before it reaches the soil, preventing lake pollution.
- It operates independently of power lines using solar energy and can withstand extreme cold.
- The technology recycles waste into useful resources: clean water, fertilizer, and biogas.
- This breakthrough could permanently replace septic tanks in Canada, improving environmental and public health.
What the video covers
- A Northern Ontario engineering team developed a solar-powered wastewater treatment machine that replaces traditional septic tanks.
- The device is compact, about the size of a garden shed, and operates efficiently even at -40°C.
- Traditional septic tanks only hold waste and rely on soil for cleaning, which is ineffective in much of Canada due to frozen ground and thin soil.
- The new system uses bacteria, ultra-fine filtration, mineral exchange, and electrolysis of salt to clean wastewater and remove harmful nutrients like nitrogen and phosphorus.
- It captures biogas produced by bacteria, using it as a heater to maintain operation during harsh Canadian winters.
- The technology was initially tested in tropical countries like Kenya and the Philippines before being adapted for Canadian winters.
- The system produces clean water for reuse, liquid fertilizer, and biogas fuel, unlike septic tanks that simply discharge waste into the soil.
- This innovation addresses environmental issues like lake pollution caused by failing septic systems on thin soil and rock.
- The machine is self-sustaining with solar panels and batteries, and future models will include AI for autonomous operation and maintenance.
- Replacing septic tanks with this system eliminates the need for costly drain field repairs and protects fragile Canadian ecosystems.
Chapters
- 00:00Introduction to the septic tank replacement machine
- 00:59History and limitations of traditional septic tanks
- 01:51How the new system removes harmful minerals
- 02:45Challenges of size and cold for wastewater treatment
- 03:38Environmental challenges on the Canadian Shield
- 04:32Impact of failing septic systems on lakes
- 05:23Need for a new system that cleans before soil contact
- 06:06Boreal Water Lab and global testing background
- 07:06Detailed operation of the new wastewater system
- 08:38Resource recovery: fuel, water, and fertilizer
Full Transcript — Download SRT & Markdown
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cleans its own wastewater, and keeps working when it's 40 below outside. And the thing it's replacing is far older and far stranger than most people realize.
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The septic tank in your yard doesn't clean anything. It never did. It was never built to. The idea goes back to France around 1860, and it was patented in 1881. Its whole job fits in one sentence. Hold the waste long enough for
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the heavy stuff to drop. Push the leftover water out into the ground [music] and trust the dirt to finish the work. No filters, no treatment, just patience and soil. [music] Here's the strange part. Canada became a country in 1867.
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The septic idea was already working in France before that. The tank under your lawn is older than Canada itself. The materials changed. Brick, then concrete, [music] then plastic. The idea never did. So, it's a little ironic that the
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country where the ground freezes rock hard for half the year, the worst place on Earth for a system that relies on soil, might be the first to retire it.
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And it wouldn't take a bigger tank. It would take sunlight, bacteria, and one very Canadian trick for surviving winter. [music] Quick favor before we get into it. If you like stories like this, give the video a like and
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subscribe to Canada 2050. It genuinely helps, and there's a lot more like this on the way. Now, here's a twist you probably won't expect. You may already own a piece of this machine. If there's a water softener in your basement, you
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top it up with salt and [music] inside the unit grabs the hard minerals out of your water and swaps in something harmless. This new system uses that exact same trick to pull nitrogen and phosphorus out of sewage. The two things
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that turn clear lakes green. [music] And that bag of salt, it plays a second role inside this machine, too. Hold on to that. Engineers have known how to properly clean wastewater for more than 50 years. Knowing how was never the
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issue. Shrinking it was. City treatment plants are built for whole neighborhoods. Every time someone squeezed one down to fit beside a single house, it broke, clogged, or needed [music] an expert on speed dial. And Canada stacks a second problem on top.
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Cold. The bacteria that do the real cleaning are alive. And when they get cold, they barely move. A Canadian January can shut the whole thing off.
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Two problems stacked: size and [music] cold. For decades, nobody beat both at once. And the Canadian team that finally did had spent years proving their machine in places that never see snow.
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To see why that matters, you first have to see what's really going on underground. A septic tank isn't a mini treatment plant. It's a holding box. The solids sink to the bottom as sludge.
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Grease floats up as scum. The water in the middle flows out into a drain [music] field, a grid of buried pipes full of small holes and trickles into the soil. The real cleaning happens in the dirt. The [music] tank just keeps
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the chunks out of the way. And it's under almost every cottage, farm, and hunting camp in the country. Roughly one in every seven Canadian homes is still bedding on that same buried box. On deep, sandy soil, it works fine. But a
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huge chunk of Canada sits on the Canadian Shield, ancient bedrock with only a thin layer of soil on top. Lakes are everywhere, so groundwater is often just a few feet down. And for months, the ground is frozen solid. Thin soil,
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high water, frozen dirt. Three strikes against a system that needs the ground to do all the work. Keep that frozen ground in mind. One January night, a small team in Ontario put their machine up against the worst of it. And what
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happened is the [music] reason this story exists. And when a septic system fails, rebuilding the drain field can cost $8 to $25,000.
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But the real damage shows up at the lake. Picture any shoreline on a Canadian postcard packed with cottages built decades ago on rock a few meters from the water. When those old systems fail on thin soil, [music] the
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phosphorus slides through cracks in the rock and into the lake. Phosphorus is plant food. In a [music] lake, it feeds the thick green algae that closed swimming beaches by August. On one Mscoa Lake, the local lake association counted
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412 systems. Almost 300 were more than 40 years old. After a summer of beach closures, the township gave owners until 2030 to bring everyone up to code.
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Here's the problem. On solid rock, a new drain field means blasting bedrock or trucking in loads of sand. So last year, just 11 systems on that lake were replaced. At that pace, clearing the backlog takes about 27 years. The 2030
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deadline isn't a plan. It's a wish written on Township Letterhead. Hold on to that lake. We're coming back to it.
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What that lake needs isn't a better tank. It needs something that cleans the water before it ever touches the rock.
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And that's where every attempt fell apart. You could build something that cleaned water well, something small, something that ran without a power line.
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But one machine that did all three and still worked at 40 below? It didn't exist until a small team in northern Ontario brought their own machine home from the tropics and taught it how to survive winter. Meet Dr. Elise Tromblé.
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She's an environmental engineer who grew up on a lake in northern Ontario. And every summer as a kid, she watched the green line of algae creep a little further along the shoreline. Today, she runs a small university team called the
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Boreal Water Lab. And for nearly 20 years, they've chased one goal, a toilet system that [music] needs no sewer, no running water, and no power line. Here's the twist. Their machine didn't go to work in Canada first. Backed by a global
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program dedicated to reinventing the toilet, it was first tested at a school in rural Kenya. Then it went to the Philippines, replacing [music] dangerous pit latrines at schools that had never had safe sanitation. Hot places, remote places, places with almost nothing. In
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all, it served around 16 schools. But Tromblé never forgot the lake she grew up on. She always meant to bring the machine home. There was just one thing it had never faced, a Canadian winter.
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So, how does it actually work? Four steps. Step one, the wastewater flows into a sealed airtight chamber where bacteria break [music] down the waste. A septic tank has bacteria, too, but that's where the similarity ends.
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Instead of draining into the dirt, the leftover water gets pushed slowly through an ultra-fine filter with holes far too small to see. It catches the tiny bits of waste a septic tank simply lets go. Step two, remember the water
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softener? The filtered water passes through the same kind of mineral swap, which strips out nitrogen and phosphorus, the exact nutrients that feed algae, before they ever get near a lake. Step three, remember the salt? The machine takes ordinary table salt, runs
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electricity through it, and makes its own chlorine. That chlorine kills whatever germs are left. Table salt and a little power. That's it. Step four is the part most people miss. Nothing coming out of this machine is wasted.
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The bacteria give off a gas you can burn called biogas. It's the same methane landfills burn off just to get rid of it. Here it's captured. The cleaned water can flush toilets again or water a garden. And the nutrients from step two
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become liquid fertilizer. Fuel, water, fertilizer. [music] A septic tank gives you none of that. It just hands everything to the soil and hopes. And this is where the Boreal team pulled off the move that makes it work in Canada. While the machine was working
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in Kenya and the Philippines, the biogas was a nice extra, something you could cook with. Back home, Tromblé's team turned it into a heater. They wrapped the bacteria's chamber in heavy insulation, the way you'd winter
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back around to keep the bacteria warm. Think about that. The machine burns its own waste gas to keep its own workers alive, and it never borrows a single watt of heat from the grid. That's why the winter version got a name of its
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own. The team calls it the hearth. The rest of its power comes from the sun.
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Solar panels charge heavyduty batteries, and the whole system runs itself. It copes with heavy use, light use, and long stretches of no use at all. Like a cottage that sits empty from Thanksgiving until the May long weekend.
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No trench for a power line. No monthly hydro bill to keep your toilet working.
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No ice storm that takes out your plumbing along with your lights. Then there's Sam Kowalc. Sam joined the project as an undergrad looking for a summer job. He stayed for his masters, then his PhD, and today he's the team's
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lead field engineer. 14 years on one machine. His first winter test unit froze solid in a single night. His second cracked its tank. One February, he slept in a heated trailer beside the test site to check the readings every 3
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hours. Then came last January. The thermometer outside the test site hit -41. Inside the hearth, it held at about 20°. The bacteria never noticed winter.
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And the water coming out. In a long-term field [music] study, including long stretches when nobody used it at all, the system removed 97.6% 6% of the solid waste, almost all of it gone from a machine with no sewer and no power line.
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And it stripped out more than 82% of the nitrogen that feeds algae. Its cleaned water met [clears throat] most of the requirements of the official international rule book for toilets that aren't connected to a sewer. This isn't a one-off prototype. [music] The core
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design is already being built in factories by companies licensed to make it. And now a 3-year, $5 million research grant is paying to get the household version approved for Canadian homes with trial installs and real families using it day-to-day. Tromblé's
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team is also building AI into the newest models so the system can watch itself and adjust on its own instead of a technician driving out on a snowy back road. [music] And that garden shed from the very start, here it is. The hearth
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fits in about 52 square ft and it sits entirely above ground. No digging, no blasting bedrock, [music] no excavator chewing up your yard for weeks. This fall, it became the very first technology tested under a new provincial program built to fasttrack
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systems like this toward approval. Go back to that Msoka Lake. 300 old systems, a deadline nobody can hit, and 11 replacements a year because every new drain field means blasting rock. A shedsized box that needs no drain field,
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no blasting, and [music] no digging changes that maths overnight. And because it strips the phosphorus out before the water leaves the property, it goes after the algae right where [music] it starts. And on that lake, it's already started. This spring, under a
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special research permit, one of the very first trial units went in at a cottage right on the shoreline. The old system there was one of those 40-year-old ones sitting on bare rock, and two contractors had already told the owners
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a new drain field couldn't be built. The trial unit went in over a single weekend on the flat patch of rock beside the boat house. By August, water tests along that cottage's shoreline showed [music] almost none of the phosphorus the old
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system used to leak. One cottage doesn't fix a lake, but 300 might. Now go north, [music] where some ground never thaws at all. That's perafrost, and you can't build a drain field in it. For those communities, a septic system was never
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an option. A sealed box that brings its own power and makes its own heat could one day be the first real option they've ever had if it can beat the long northern dark. More on that in a moment.
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So, when does it reach your yard? Here's the part most stories like this skip.
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You won't find it at a hardware store next spring. The core machine is built and proven. The Canadian winter version, the Hearth, is in its final stretch. One last round of winter testing, then official approval. [music] Three hurdles
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stand between it and your yard, and the team is already working on everyone. Hurdle one is approval. [music] No contractor can legally install a wastewater system the province hasn't signed off on. And no bank wants to finance [music] a property with an
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unapproved one attached. That's exactly what the grant is for. Passing a test and getting [music] approved for a cottage in Msoka are two very different finish lines. Hurdle two is maintenance.
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And this is where we answer the word in the title forever. Once this goes in, the old tank and the drain field are gone for good. No more digging up the lawn. No more failed drain field. No more sewage seeping through the rock
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toward the lake. That part [music] really is permanent. The machine itself still gets a routine sledge cleanout the way a furnace gets its filter changed, a quick visit to a box above ground.
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That's [music] ordinary upkeep, and the septic tank is never coming back. Hurdle three is the dark. Solar panels need sun, and a Canadian December doesn't offer much. The machine already made it through that January at -41°.
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What the team is proving now is the worst case. a whole week of storms with almost no [music] sun. Bigger batteries are going in this winter to get it through that, too. And there's one more detail about where all of this began
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that changes how the whole story looks. The septic tank was born in the mild weather and soft soil of 19th century France. It crossed an ocean and spread across a country made of rock, [music] lakes, and winter. The opposite of
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everything it was designed for. It's older than Confederation. It outlasted two world wars and [music] every appliance in your kitchen. And it barely changed at all. And the machine that may finally replace it was built in Canada.
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But it didn't prove itself here first. It proved itself in some of the hottest places on Earth. In schools where children had never had a safe toilet.
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Only then did a kid who grew up on a northern Ontario lake turn it around, point it at home, and ask the one question it had never needed to answer.
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Can it survive the cold? The answer had been sitting inside the waist all along.
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All it needed was a hearth. Picture walking down to the dock on a hot August afternoon [music] and seeing straight through the water to the rocks on the bottom. No green film along the shore.
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No smell drifting up from the yard after a summer storm. Just the [music] lake the way you remember it as a kid. So, here's what I want to know. That old tank isn't only under your yard. It's under the farm down the road. your
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uncle's hunting camp and the small town that never got a sewer line. If this rolls out, which one do you think gets it first? And who's going to miss the pump truck pulling into the driveway?
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Let me know in the comments. And if you have ever wondered how close the things you rely on are to being replaced, our ebook answers [music] that. The link is in the description. And if this one made you look at your backyard a little
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differently, like the video and subscribe to Canada 2050. There's plenty more coming.
Topics:Canada septic tank replacementwastewater treatmentsolar powered septic systemenvironmental engineeringcold climate wastewater treatmentBoreal Water Labbiogasnitrogen phosphorus removallake pollution preventioninnovative sanitation technology
