Hacker News new | ask | show | jobs
by Pine_Mushroom 821 days ago
For a contrarian take on mycoremediation here is a quote from noted mycologist Alan Rockefeller:

"Mycoremediation barely works, most times I think it is better to save the time and energy and let nature do the remediation. Particularly with regards to mycofiltration, eating oil and heavy metal removal. If you do nothing at all, natural bacteria and fungi in the environment will do the remediation - so maybe just mix in some substrate, turn the soil and let nature do the rest.

Regarding mycofiltration, doesn't really work and even if it did, wouldn't take long for the mycelium to go anarobic and die. One idea I heard is to just dump a truck load of wood chips in the stream, and let nature do the rest. At least that way you are not wasting energy making spawn. No idea if this works at all.

You can eat oil with oyster mushrooms, but it has to be at really low concentrations, and you probably burn more oil than you eat making the spawn. Natural bacterias eat oil too and they are everywhere.

Regarding Paul, he is a great salesman and ambassador, and he has gotten a lot of people into mushrooms. For that he deserves to be held in high regard. He is pretty cool in person. I do think he probably oversells his products, and that medicinal mushrooms shouldn't be sold as medicine until they are proven to work. Turkey tails have been proven to work (but not very much), and the rest of them are pretty much untested in large clinical trials. Mushrooms do make excellent placebos.

If you ask professional mycologists about Stamets or mycoremediation or medicinal mushrooms, they typically change the subject pretty quick, if they are feeling polite.

There are a ton of people doing mycoremediation trials, but almost no one scaling it up to solve real world problems. Every idealistic first year college mycology student wants to save the world with mushrooms, but by the time they get a PhD they are thinking very differently.

Tradd Cotter and Peter Mccoy are doing a lot of work with mycoremediation, but I notice that they are mostly making their money writing books and giving workshops/lectures rather than actually doing it. But they probably answer their emails and would be excellent people to talk to about details and new ideas."

2 comments

>heavy metal removal. If you do nothing at all, natural bacteria and fungi in the environment will do the remediation - so maybe just mix in some substrate, turn the soil and let nature do the rest.

And where exactly will the bacteria send the heavy metal?

This is beyond my expertise, but here is a quote from a paper on the subject:

"Bacteria have several methods of processing heavy metals through general resistance mechanisms, biosorption, adsorption, and efflux mechanisms. Bacillus spp. are model Gram-positive bacteria that have been studied extensively for their biosorption abilities and molecular mechanisms that enable their survival as well as their ability to remove and detoxify heavy metals. This review aims to highlight the molecular methods of Bacillus spp. in removing various heavy metals ions from contaminated environments."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8402239/

I disagree with basically all of that.

He say mycoremediation barely works and then literally describes mycoremediation. "so maybe just mix in some substrate, turn the soil and let nature do the rest"

>Regarding mycofiltration, doesn't really work and even if it did, wouldn't take long for the mycelium to go anarobic and die.

Then a sentence later.

>I have no idea if this works.

You know why that is? Because he hasn't done it.

>medicinal mushrooms shouldn't be sold as medicine until they are proven to work

They do work. Very well. 1000s of years of human history and 1000s of clinical trials have proven it. I had never heard of Alen Rockefeller before now, but with that one statement makes me think he's either retarded or disingenuous in his opinion.

Alan is quite well known and respected in the field. Fair enough pointing out he has no experience with mycoremediation, but I still find his opinion worth considering.