Very sharp tang (also posted in sterilising)

[AFG]

Any ideas what it is?
I assume some sterilising issue.

I have just re-started homebrew after a break of about 10 yrs.
I re-used my old polythene beer barrels and fermenting bins.
Both barrels were the type with a float, and tap at the bottom connected via a pipe.
The first brew was a full mash, tasted good in the fermenting bin, secondary fermenter, but when it came out of the barrel tasted foul.
Not like vinegar, but a sharp taste at the sides of your tongue.
I relegated it to the skip.(Barrel and all).
Having wasted that, I went for a Woodfordes kit, easy to make and tasted great at barreling stage.
Left it a week or two, and the same taste.
I sterilised the first batch with old SDP, and the 2nd batch with bleach.
I never had this problem before.

Do you think that the barrel, pipes etc have had it?
Is there a rescue plan.
I think I’m going to bin the lot (equipment included) AND START AGAIN Using a microbrewery kit.
Any way to rescue the brew?

Thanks

[Ditch]

You poor sod! I think we'll all have to observe a moments long faces over that one!

I won't start opining about cleaning here, because it's sure to get covered under the Cleaning Board anyway.

Just a vote of sympathy and well done for not letting it break ye will. At last ye recognise it's 'just' a spanner in the works and not the end of the world

[EoinMag]

Change all of your equipment, start again, you probably have an infection in something.

[Jim]

Dismantle your taps and clean them thoroughly; thats where the bacteria survive. Soda crystals dissolved in water will help get the crud off your gear, then they just need normal sterilisation.