cross flow filtration & Acid Value Measurement [merged windmill]
kat sini ada tak yang mahir atau tahu pasal cross flow filtration?apa significant antara micro filtration dan ultrafiltration, selain saiz membrane yang berbeza?
sedikit info:
Micro filtration is a process for separating material of colloidal size and larger from true solution by using a membrane. The micro filters membrane pore size in the range of 0.1 - 10µm. A micro filtration membrane is generally porous enough to pass molecules which are in true solution, and also can be used to sterilize solutions since they may be prepared with pores smaller than 0.3µm, the diameter of the smallest bacterium, Pseudomonas diminuta.
Ultra filtration is a membrane process with the ability to separate molecules in solution on the basis of size. An ultra filtration membrane acts as a selective barrier which it will retain species with molecular weights higher than a few thousand Daltons (macrosolutes), while freely passing small molecules (microsolutes and solvents).
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bagaimana mechanism sistem filter ni?
kelebihan dan kekurangan....anything la yang korang tahu pasal ni...
terima kasih (pertama kali post kat sini...:nyorok:)
[ Last edited byadlismel at 16-11-2006 08:48 PM ] takde sape ke leh tolong aku neh
Acid value measurement
tatau nak tanya kat mana....ada sesapa tau tak cara nak test acid value selain titration guna KOH?
mill ada solution nak check tapi warna dia gelap so kalau letak phenolphatalein susah nak detect beza warna dia
anybody tau alternative method nak check?
ada contact tak independant lab yg accept buat analysis nie.... titration gune NaOH............ :2lol: :2lol: ASTM D974 - Manual titration utk acid & base number......tp dark solution x bleh guna method nih......the best way is autotitration (end-point by beza upaya....), lab aku boleh buat, tapi solution kau tu minyak ke..atau bukan minyak? Ape2 hal, PM aku, nnt aku bg contact lab aku... Originally posted by aku_EnSeM at 6-11-2006 05:18 PM
titration gune NaOH............ :2lol: :2lol:
wat lawak yer... :geram: Originally posted by pala_hotak_lu at 12-11-2006 08:45 AM
ASTM D974 - Manual titration utk acid & base number......tp dark solution x bleh guna method nih......the best way is autotitration (end-point by beza upaya....), lab aku boleh buat, tapi solut ...
alhamdulillah ada pun yang boleh buat :pray:
details aku pm yer
thanks a lot :tq: OK....aku dah bace PM ko, aku check dulu ngan analyst tue boleh buat tak utk solvent sbb dia biase test myk jer...aku confirm balik nnt... acid value?
maksudnya u nak tahu pH acid tu atau concentration?
if concentration, in industry field,selalunya solid content test akan dijalankan.. benda ni mechanism dia mcm filter biasa..
cuma ia dipanggil micro filtration kerana dia punya capability utk menapis foreign material bersaiz micro di dalam satu solution..
capability dia utk menps foreign matter tu bergantung kepada pore size of the membrane laa..ada byk range size yg boleh kita pilih,..
teknologi penapisan membrane ni byk digunakan dlm industri skrg,contohnya dlm rawatan air di industri..
Reply #7 pala_hotak_lu's post
masih menunggu reply dari pala........ :ah:Reply #8 chemist_UTM's post
saya nak tahu concentrationany idea selain dari titration? ultra dgn micro
micro nyer pore size lagi fine kottt :nyorok: Acid Value tu unit dia: mgKOH/g
maksud: Jumlah KOH yg diperlukan utk neutralize 1 g sample (lagi tinggi amount KOH bermakna sample tu mmg acidic....)
Reply #15 pala_hotak_lu's post
yup... :setuju:in other words, content free -COOH in a solution :) Originally posted by windmill at 16-11-2006 07:27 PM
ultra dgn micro
micro nyer pore size lagi fine kottt :nyorok:
:setuju: micro punya pore lagi fine
Reply #17 chemist_UTM's post
apa application micro pores membrane ni yer....saya cuma guna cartridge jer...... Originally posted by lost_angel at 21-11-2006 06:01 PM
apa application micro pores membrane ni yer....
saya cuma guna cartridge jer......
skrg ni salah satu teknologi yg baru dari taiwan ialah gunakan micro membrane ni di wastewater treatment plant industry..
micro membrane ni akan digunakan di final discharge of the wastewater treatment plant..funsi dia lebih kepada utk memerangkap floating or suspended solid yg ada potensi utk jadi kan final discharge out from STD A or B..
th advantage of the new technology ni ialah pores di tak plug up..coz dia ada mekanisme back wash utk bersihkan material yg tersumbat kat pores..
btw,nanti saya dah buat test di wastewater treatment plant,saya update lagi ttg technology ni..
Reply #19 chemist_UTM's post
teknologi ni dapat atasi masalah membrane fouling tak?-major problem in filtration,boleh decrease permeate flux
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