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Kayıt Tarihi: 2021-13-Ocak
Aktif Durum: Pasif
Gönderilenler: 30
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| Gönderen: 2021-02-Subat Saat 09:13 | Kayıtlı IP
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Commercially available powdered activated carbon (PAC)
with a median diameter of 12–42 μm was ground into 1
μm sized superfine
PACcarbon/powdered-activated-carbon.html">activated carbon
powder price(SPAC) and 200 nm sized submicron SPAC
(SSPAC) and investigated as a pretreatment material for
the prevention of hydraulically irreversible membrane
fouling during a submerged microfiltration (MF) process.
Compared with PAC and SPAC, SSPAC has a high capacity for
selective biopolymer adsorption, which is a
characteristic found in natural organic matter and is
commonly considered to be a major contributor to membrane
fouling. Precoating the membrane surface with SSPAC
during batch filtration further removes the biopolymers
by straining them out. In lab-scale membrane filtration
experiments, an increase in the transmembrane pressure
(TMP) was almost completely prevented through a
precoating with SSPAC based on its pulse dose after
coagulation pretreatment. The precoated SSPAC formed a
dense layer on the membrane preventing biopolymers from
attaching to the membrane. Coagulation pretreatment
enabled the precoated activated carbon to be rinsed off
during hydraulic backwashing.
activated carbon
manufacturers in usaThe functionality of the
membrane was thereby retained for a long-term operation.
Precoating the membranes with SSPAC after coagulation is
a promising way to control membrane fouling, and
efficiently prevents an increase in the TMP because of
the straining effect of the SSPAC and the high capacity
of the SSPAC to adsorb any existing biopolymers.
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Konu: Precoating membranes with pac
