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CNG NGH SN XUT

NEM CHUA

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Gii thiu v nem chua

Nem chua l loi thc phm ln menlactic t tht, c nhn dn ta rt a thch.Nem chua ca mi vng c mt hng v c

trng ring.- Min Bc: Nem V ( T Lim, H Ni ),

Nem Ph T ( Bc Ninh )..

- Min Trung: Nem chua ng Ba(Hu),Nem chua Ch Huyn (Bnh nh )- Min Nam: Nem Th c (H Ch

Minh), Lai Vung ( ng Thp)

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Ai v Vinh Thnh qu emn nem ch Huyn, m xem

ht tung

Nem chua ch Huyn Giyquyn Sa Hunh

Nu xa mc nu, hai amnh ng xa.

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1. Nguyn liu sn xut nem chua

1.1. Tht nc Cc yu cu ca thtTht nc mi nhn t l

git m ( tht nng).Phi l tht nc i sau hoctht mng.

Tuyt i khng cra tht qua nc. hn chti a m v vi sinh vt

thm nhp

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1.2. Da heo

Vai tr ca da heo-Cht n.

-Cht kt dnh cc phn t

trong m c.-Gip nh hnh sn phm.

-Lm tng gi tr cm quan,

tng gin, dai-T l gia lng tht nc vda heo l 3:7

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1.3 Cc loi gia v

Gia v

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ng:

To hng v cho nem.

L c cht cho qu trnh ln menlactic.

Gip trng thi lin kt gel thm cht.

Mui:To v mn cho sn phm.

c ch vi sinh vt thi pht trin gy

h hng sn phmCn s dng vi nng thch hp.

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Bt ngt:Gip to vB sung rt t

Ti:

Vai tr ca tiL gia v p, kh mi hay tomi.

Tc dng dit khun mnh i vicc vi sinh vt: Staphylococus,Salmonella, Shigella

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Tiu:

Vai tr ca tiu

To v cayKhng vi khunKhng nm mc

Kch thch tiu hat:Cha tinh du, vitamin C, vitamin

K, -caroten, mt s chtkhongAlkaloid to mi thmv to v cay.Cha Phitocide l cht khng sinh

thc vt.

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Bao b:

L vng (l i)Bao nylon

L chui

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2.S quy trnh snxut nem chua Vit Nam

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Trn u

Qut nhuyn

p

xay

Luc chn

Ra

ro

Lm sch

Tch mCt si

Lc

Da heo

Gia v

Ti xay

Tht heonng

Gn

M

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Nhit phng 3-5 ngy

p nh hnh

Sn

phm

Vo vin

Gi

Gi

Ln men

L chui

t, tiTiu ht

L i

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3.Cc qu trnh xy ra trong nem chua

S acid ha l s bin i c trng nhtca qu trnh hnh thnh sn phm. y l ktqu ca qu trnh chuyn ha k kh cc hpcht ng nh s hot ng ca vi khun

lactic.Acid lactic to ra hng v c trng,

rn chc thch hp cho sn phm. Ngoi ra

acid lactic cn c tnh cht st trng, c chs pht trin ca nhiu vi sinh vt gy hhng sn phm.

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Mu sc c trng ca sn phm tht cth hin bi cc sc t c trong tht ch yu lmyoglobin.

Myoglobin chuyn sang dng metmyoglobinnn lm cho tht c mu thm.

Hng thm ca sn phm tht ln men ctao ra bi cc loi gia v v cc acid sinh ratrong qu trnh ln men. Vi nng acidcng cao th hng thm cng mnh.

4.Bin i mu sc v hng thm

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5.H vi sinh vt

S chuyn ha ng thnh acid lactic nhhot ng ca vi khun Lactobacillus,pediococcus, Microccocus,Clostridium

Trong nhiu nht v ng vai tr quan trngnht l chng Lactobacillus.

Chng Lactobacillus ngoi vai tr chnh l sinh

acid lactic, cn c kh nng sinh ra cc chttham gia vo qu trnh to hng thm chosn phm.

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6.Cc yu t nh hng

Nguyn liu.Bao b: l vng (hay l i), nylon, l chui.H vi sinh vt.

Thao tc tin hnhTo ym kh pH : 5.6-6.2

Nhit ln men: 27 30oCThi gian ln men: 4-5 ngy (ma h)

5-7 ngy (ma ng)

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7.Yu cu i vi nem

Hnh dng bn ngoi: gi p mt, lp lchui chuyn sang mu vng xanh nhng khng bkh, khng b m, khng b mc.

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M lp bao gi:

Lp l i chuyn sang mu sm.

Nem chua c mu hng t nhin, mi thm catht chn kt hp vi mi gia v to s hi ha, kchthch v gic,B mt nem chua c trn mn, kt dnh, khng

m, khng nht, khng nhim mc trng, xanh.

Khi n: dai, gin,ngt, mn, chua, cay.

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8.Y t

Dinh dng v v sinh an tonthc phm nem chua

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Thnh phn dinh dng ca nem chua

Thnh phn dinh dng n v 100g n cNng lng Kcal 143H

2O g 68.0

Protein g 21.7

Glucid tng hp g 4.3Lipid g 3.7

Canxi mg 24.0

Photpho mg 78.0

T h bi kh k th

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Trong nem nu ch bin khng k th vntn ti nhng loi vi khun gy thi ra, vi khungy bnh nh : Ecoli, Samonella, clostridium

putrificusTrong quy trnh ch bin, nu khng m

bo c vn v trng, cc mn n ny rt d

b nhim bn, nhim khun do nhiu ngun khcnhau: bn tay ngi sn xut, dng c sn xutkhng m bo v sinh, cc loi l khng c

ra sch nn d tr thnh mt trong nhngnguyn nhn lm ly truyn nhng bnh truynnhim ng tiu ha trong c bnh tiu chy

cp nguy him.

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Cm n s lng nghe ca c

v cc bn!!!