Preparation of porous poly(vinyl alcohol)-silk fibroin blend membranes

results suggest that this process potentially

Research Trends

as a space-saving

were made

‘synthetic’ phenol,

which

crossflow which

removal

under

15 years

was

used

with phenol

for

the

inoculum,

was continuously

to the process

retaining

VSSII.

was completely

Phenol

ammonia The

was simultaneously

nitrification

when

phenol

mg/l

d. It was

ammonia

and

rate

observed

and

mg N/l

via

denitrification.

enhanced

of the

the

denitri-

rate to 160 mg N/l d by using phenol,

approximately

nitrogen Methanol, electron processes,

was

24% recovered

which donor

of as

is the most

in conventional

the

denitrified

nitrous

oxide.

commonly nitrogen

used removal

did not enhance

the denitrification

rate of the phenol-acclimated

activated-sludge

used

d

in this

study,

MembraneTechnology

however

No. 141

phenol

did.

electric

The

field

upon

membranes.

The

could

uniaxially

e3, increased within

enhanced

then ratio.

nonlinearly electron

reorientation

under

It was indicated

of the blend membranes

increasing

d3i non-

that the pore decreased

increased

of PVA

temperature.

proportion

With

increased. was larger

When than

increasing of the blend

the blend

25175

ratio

and the initial membrane

ratio if T< Tg.

and poling

effect

the electric

tensile

increased

somewhat,

and the compressibility

decreased

a

little

increasing

of PVA,

or

effects on the

decreasing

response

of the

was considered of

the

photographs

of the specimens.

membranes

of

or 50150,

of the

blend

and

with an

or decreasing an

of PVA, the crystallinity

membrane PVAISF

obviously

proportion

freezing

blend

by means of freeze drying)

the elongation

microscopy

the

diameter

fine structure PVA/SF

strength,

of the piezoelectric for

(prepared

porous

freezing

modulus

the stretching

account

membranes

of

fibroin

and

d3i and

of the macrofibrils

to

with the morphology,

properties

ratio

with I’, for the samples

packing

poly(pelargonamide)

(September

alcohol)-silk

temperature

of the

the range

both

of poly(viny1 blending

that the pore density

by being

within

relation

of the

e3, increased

However,

illustrate

The origin

2760-2768

of porous poly(vinyl fibroin blend

was investigated. of

T > Tg. and

the range of the stretching

Scanning

increasing

response

constant,

infra-red

Hsu: Macromolecular Chemistry

(PVA/SF) and a

orientation

ferroelectric

with R,, for the samples

of the stretching

of the

stretching

When

The

and non-

the uniaxial be greatly

polarized

2001).

Preparation alcohol)-silk membranes

required

with

by a better

cold-drawn.

kept

linearly

Y.

polymeric

switching

excitation

ratio caused

Yu, C.-S.

and Physics 202(13)

membranes

of the oriented

Dipole

H.H.

by

examinations.

3089-3096

on the demonstration

the dipoles

was

to

E Yamaguchi,

a ferroelectric

curves

samples.

samples

at a rate up to 300 O-13%

lower

be

based

stretching

to nitrate.

that

removed

aeration

200

material,

D-E hysteresis

mg

removed,

reached

to

shown

evidenced

spectroscopy

membranes

are

and

at 8000

Poly(pelargonamide)

oriented

inhibitory

35(13)

by

supplied

nitrified

was removed

was

Intermittent fication

biomass

Research

poly(pelargonamide)

for over

was

2001).

Synthesized

biomass,

works

nitrogen-

for denitrification.

of

process with

Activated-sludge

wastewater

from

presence

to nitrification,

had been acclimated

synthetic

ammonia the

activated-sludge

filtration.

(September

donors

J. Leite, S. Ueda,

Water

Suwa:

is inhibitory

using a single-stage

as electron

T Yamagishi,

to remove

wastewater

energy-saving

removal process by using substances nitrifiers

Phenol and ammonia Attempts

and

the

dipoles

field poling

and

with

increasing the freezing membranes

freezing

temperature.

the proportion temperature, could

smaller pore diameter, crystallinity,

proportion

strength

porous

be

Therefore,

by

of PVA or decreasing SFlPVA

blend

which

had

prepared

larger pore density, higher and elongation.

0