TECHNOLOGY IMPROVEMENTS AT A GLANCE
The replaced ceramic flat sheet membrane system is designed as single plate module with stainless steel frame which is the most common design used in sewage treatment applications (developed in 2006).
12 years later, the operator of the MBR plant decided to use the latest design generation of CERAFILTEC. The old system was still functional, a proof of the robustness of the ceramic technology. However, the focus of the replacement was to reduce the operational expenses of the plant.
PROCESS FLOW DIAGRAM
BLOWER FOR AIR-SCOURING
BLOWER FOR BIOLOGY
BUFFER TANK
ANOXIC TANK WITH INTERNAL CIRCULATION
RECIRCULATION FLOW
RAW WATER FROM HOTEL & RESTAURANT
DRAINAGE WATER BACK TO PLANT
SCREEN 3 mm
REED BED FOR EXCESS SLUDGE DECOMPOSITION
CERAFILTEC INSIDE MBR AEROBIC TANK WITH 1 TOWER
FILTRATION PUMP
BACKWASH PUMP
FILTERED WATER TANK
RE-USE TOILET FLUSHING
EXCESS SLUDGE DISCHARGE
PERFORMANCE DATA
| PARAMETER | UNIT | INLET | FILTERED WATER |
|---|---|---|---|
| COD | mg/L | 1,000 - 1,100 | 27 |
| BOD 5 | mg/L | 540 - 550 | < 1 |
| NH4-N | mg/L | 34 - 35 | < 0.03 |
| NO3-N | mg/L | < 0.23 | < 0.023 |
| NO2-N | mg/L | 0.028 - 0.07 | 0.008 |
| TOTAL N (inorg) | mg/L | 34 - 35 | 0.009 |
| TOTAL P | mg/L | 19.9 - 26.7 | 1.08 |
| MLSS/TSS | mg/L | 13,000 | < 1.0 (nil) |
| PARAMETER | UNIT | OLD SYSTEM | CERAFILTEC test 1 | CERAFILTEC test 2 |
|---|---|---|---|---|
| Module design | Single plateSteel frame | Single plateModule 6.0 S | Single plate forModule 6.0 S | |
| Membrane type | Alumina 0.2 µm | SiC 0.1 µm | Alumina 0.1 µm | |
| Filtration/Backwash | min/sec | 10/40 | 30/40 | 15/30 |
| Air-scouring | Nm³/hr | 60 - 80 | 40 - 50 | 40 - 50 |
| Flux rate | LMH | 15 - 31 | 50 - 80 | 50 - 60 |
| TMP (avg) | bar | -0.40 | -0.25 | -0.20 |
| CIP | Once a month | After 5.2 months | N/A |
| COD | Inlet 1,000 - 1,100 mg/L Filtered water 27 mg/L |
| BOD 5 | Inlet 540 - 550 mg/L Filtered water < 1 mg/L |
| NH4-N | Inlet 34 - 35 mg/L Filtered water < 0.03 mg/L |
| NO3-N | Inlet < 0.23 mg/L Filtered water < 0.023 mg/L |
| NO2-N | Inlet 0.028 - 0.07 mg/L Filtered water 0.008 mg/L |
| Total N (inorg) | Inlet 34 - 35 mg/L Filtered water 0.009 mg/L |
| Total P | Inlet 19.9 - 26.7 mg/L Filtered water 1.08 mg/L |
| MLSS/TSS | Inlet 13,000 mg/L Filtered water < 1.0 mg/L (nil) |
| Module design | Old system: Single plate + Steel frame CERAFILTEC test 1: Single plate + Module 6.0 S CERAFILTEC test 2: Single plate for Module 6.0 S |
| Membrane type | Old system: Alumina 0.2 µm CERAFILTEC test 1: SiC 0.1 µm CERAFILTEC test 2: Alumina 0.1 µm |
| Filtration/Backwash | Old system: 10 min/40 sec CERAFILTEC test 1: 30 min/40 sec CERAFILTEC test 2: 15 min/30 sec |
| Air-scouring | Old system: 60 - 80 Nm³/hr CERAFILTEC test 1: 40 - 50 Nm³/hr CERAFILTEC test 2: 40 - 50 Nm³/hr |
| Flux rate | Old system: 15 - 31 LMH CERAFILTEC test 1: 50 - 80 LMH CERAFILTEC test 2: 50 - 60 LMH |
| TMP (avg) | Old system: -0.40 bar CERAFILTEC test 1: -0.25 bar CERAFILTEC test 2: -0.20 bar |
| CIP | Old system: Once a month CERAFILTEC test 1: After 5.2 months CERAFILTEC test 2: N/A |
TECHNOLOGY PROSPECTS
CERAFILTEC is currently testing several ceramic flat sheet membrane materials from different producers. Two selected Alumina membrane suppliers are already installed at the benchmark test site and are indicating a significant performance increase using CERAFILTEC’s new module concept.
AT CURRENT BENCHMARK STAGE
an up to
is expected by using single Alumina ceramic flat sheet membrane plates with CERAFILTEC’s high flux module housing design in sewage treatment applications.
PLANT PICTURES
