How to get recognition of research as an independent autodidact? I have done my own research independently from any academic institution.  The theses are mainly biochemical, and aquaculture.  I would like to have the work peer reviewed.

I tried to use researchgate.net but they have created a barrier to entry for autodidacts, and non-institutional researchers.  The question answer format for stackexchage is also unsuitable.

Are there other web-portals specifically for independent, non-institutional, autodidact researchers?
You need not have any institutional affiliation to submit your work to the usual peer-reviewed journals. The only downside to lack of affiliation is that people might wonder "who you are". But there's no rule against anyone in the world submitting...

The "gotcha" is that if your writing style, formatting, referencing, and so on do not approximately conform to the standards of the milieu, people will almost surely reject your submission out of hand. That is, it is critical that you not communicate any sort of "crackpottery", which is often signalled simply by extreme, random non-conformity to simple professional standards.

So you might want to try to get advice from a seasoned professional, who knows the "parlance/standards/prejudices" of the profession. This may not be easy, especially if you approach them with a snarky or combative attitude, but I'd wager that you really do need this help.

That is, to get any kind of hearing, you "need" to demonstrate that you can comply, to some extent, with the implicit conformity demands of the milieu. Otherwise people won't pay attention to you at all. No, of course, this is not any official statement, but it is obviously the mechanism in almost every human activity.