Unintentional sour, need advice Homebrewing

Ok, folks, I need some advice on how to proceed. I made a BIAB Oatmeal Cookie Brown Ale from a kit from Northern Brewer (recipe below). This was my fourth brew and the first infection. Mash was as advertised and I was within 0-3 degrees at all times. Boil was medium intensity and spot on at 60 minutes. I started with 5G and finished with about 4G, transferring about 3.5G into primary with the rest being left behind, primarily as trub. The only thing I can think of which may have infected the batch is the cinnamon stick. I didn't do anything to it before adding, and I started cooling with a copper wort chiller within a minute or two after adding. Perhaps the cinnamon stick didn't sit in the boiling hot wort long enough to sterilize.

At any rate, here are my questions: 1) What do you think is most likely to have caused the infection? 2) More importantly, what do I do now? The beer is finished (according to FG), but can I safely bottle some, for science?

I'm not a fan of sours, but the samples taste pretty good if you ignore the sour. I'm just guessing that a sour beer lover would dig this stuff once its all carbed up. BTW, if anyone in the NoVA area wants to try/adopt this batch, HMU!

Details:

3G Batch Size

PBG: 1.049

OG: 1.063

FG: 1.024

Recipe and process:

5.5lb Pale Malt

1lb Flaked Oats

1lb Munich Malt

1lb Belgian Special B

0.5lb Brown Malt

0.33lb Pale Chocolate Malt

1oz Bramling Cross @ 60

1oz Styrian Goldings @ 15

1 Cinnamon Stick @ 0

Danstar Nottingham Ale yeast, rehydrated @ 98 for 15 before pitching

Mashed @ 154 for 60

Mashout @ 170 for 10

Boiled for 60

• Fermented at about 58-62 for the first week, now sitting at about 64. I keep the fermenter in an unused refrigerator that I manually control by plugging in for about 30 minutes in the morning and evening, depending on the wort temperature. Day 1 saw a typical krausen. Day 2-3 the krausen was thicker and resembled oatmeal in texture. Day 4-5 I noticed an obvious pellicle forming, with some very large bubbles that had a soapy appearance. Day 6-11 I was out of town. Upon return, the pellicle has reduced but is still present, and gravity is stable.

Thanks for reading my novel and for any help!

Edit: formatting.

Submitted December 14, 2015 at 06:41AM by Hammie5150 http://ift.tt/1QnqZ4I Homebrewing