Location: Chemical
Industrial Park,China
Modules: MS-FSF-8020 84pcs
General Feeback:
Chemical plant had ran MBR
skid for 6months, In these days, they found pressure difference was very high
and stable at approx. 0.65bar. general running pressure would be 0.2~0.3bar.
After CEB, the MBR’s pressure drop could recovery to 0.4bar, however, it would
be back to 0.65bar within 1weeks.
After rechecked in MBR skid
location:
1.
Active
Sludge Issue：Waste
water samples SV15<30%, which means sludge had been expend, filamentous
bacteria sired highly in water. This situation is much easy contaminate MBR
membrane. After rechecked in local, SV15<10%, SV30<20%.
2.
MBR
membrane pollute issue:
1)
The
adhered sludge on membrane is black and yellow brown color, Yellow brown is
general healthy sludge, black sludge means membrane contaminate is organic
substance. Clean situation: Sludge is very hard to clean, which means sludge
had adhered for a long time. It can’t be recoveried by CEB
2)
There
are some fiber into the sludge and membrane. It will effect membrane’s aeration
, self-clean process and faster pollute time. After checked this substance is
from former process Biochemical filler tank.
3.
Operation
issue: From location operation flow chart, we found some mistake operation. We
set CEB alert value to be 0.3bar. but end user reset alert value to be 0.45bar
to reduce CES frequency and reduce chemical cost. It leaded to sediment lots of
sludge after reached 0.45bar, which made clean to be very difficult, reduce the
performance of CEB clean.
Suggestion:
1. Recheck
sludge on time:
Check SV15, PH , NH3-N, COD
values, test MLSS every triple days. Any emergency, deal with it at once.
2. Add
fine screen:
Add 1~2mm fine screen, remove any
fiber and particals
3. Timely
CEB:
4~12hrs/backwash, 3~7days/CEB,3~6months/offline
CIP or 1~2months/Online CIP.
4. Inspection
backwash performance:
Any emergency, pls check the
operation manual, change chemical for different contaminate Or call Membrane
Solutions directly.
Technology Guide：
CIP Clean：
At beginning, we suggestion
to clean sludge pc by pc, then immerse NaClO for 30mins with 500ppm. As soon as
arrived location, we founded it very hard to operate and pollute environment.
We recommend skid clean by high pressure water to remove big sludge, then immerse
NaClO in aeration tank directly.
Geenral Backwash:
Every 4~12hrs, Backwash
water resource must be better than MBR effluence, front set Y style filter or
back set 100um filter for 1~2mins
CEB:
Every 3~7days, CEB water
resource must be better than MBR effluence, meanwhile dosing NaClO chemical
with 500ppm for 5mins, after that immerse for 10mins, then start aeration.
Online CIP
Every 1~2months, drain off
wastewater and clean MBR tank. Water immerse MBR skids, dosing chemical with
500ppm for 0.5~2hrs, then aeration 10mins, backwash 1min.
Offline CIP
Every 3~6moths, used bridge
crane and gantry crane to lift whole MBR frame, clean the sludge, then immerse
in a clean tank and add clean frequency.
Membrane Solutions, LLC
(Cell)0086-15172323686
(Skype)roy.wong66
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