(don't) Waste Water! | Water Tech to Solve the World

S6E5 - The Epic 3-Step Process that Boosts Activated Sludge


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I'll kill them all


Wait, don't worry, that's good news!


What we call wastewater sludge is, in fact, a concentration of microbial cell mass. 


To picture it, imagine a herd of micro-organisms, tired of having eaten a lot of organic matter and resting together in a mud-like aggregate.


Now, that mud can be valorized and turned both into biosolids you'll transform into fertilizer and biogas that can be used as a one-to-one replacement to fossil methane.


The problem in both cases is that these micro-organisms don't really want to cooperate spontaneously with you. 


My Precious!


As a result, your biogas production yield can be pretty low, and your output matter is still very watery, which involves more hassle to transport it out. 


That's where thermal hydrolysis jumps in for the save! It takes the sludge through a 3-step process where you heat it, then pressurize it and suddenly depressurize it.


Our rebellious micro-organisms don't appreciate that effort, and as a result, they tend to explode. 


This frees the carbon and water they held back, increasing the biogas production yield by up to 50% while halving the biosolids volume at the outlet of the sludge digester.


More energy, better waste, a win-win that will make you say: I'll kill them all!


Wanna dive deeper into the topic? Check out my full conversation with Eirik Fadnes, the CEO of Cambi - the World Leader in Thermal Hydrolysis Processes 


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(don't) Waste Water! | Water Tech to Solve the WorldBy Antoine Walter

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