Purification plants with membranes (MBR)

Ceramic membranes represent the most important innovation achieved by the research in nanotechnologies applied to water treatment.

In plants with ceramic membranes the purification process is characterised by two phases: the first is the oxidation phase where, in the presence of oxygen, the bacteria degrade the incoming wastewater.
During the second phase, separation occurs by filtering the water, deprived of the muddy particles, through microporous membrane modules (0.2 micron) submerged in the tank. This process replaces the traditional sedimentation process.

membrana ceramicamembrana ceramica
membrana ceramicamembrana ceramica

By fitting the plant with a physical barrier that can also block bacteria, it is possible to achieve results that no other traditional system can achieve.
The main features of purification processes using ceramic membranes are the 15kg/m3 mud concentration (versus 4-5 Kg/m3 of traditional systems) and the mud age exceeding 30 days.

ceramic membraneWater filtered by a ceramic membrane that acts as a bacteria barrier

MAIN CHARACTERISTICS AND ADVANTAGES

Characteristics Advantages
Elimination of the sedimentation tank Total plant volume reduced to 1/3 vs. a traditional plant (see Fig. below)
Filtration by microporous membrane Total elimination of outgoing suspended solid particles
Full compliance with the most stringent legal regulations
Discharge of de-bacterialised water Re-use of 100% of purified water
Lower production of surplus mud Lower maintenance and disposal costs
Modular geometry of membranes Application to existing plants with no need to modify tanks or stop the plant
Use of advanced tools Energy cost rationalisation and reduction
Computerised management Simplified management, lower maintenance costs, remote-telecontrol
Removal of high quantities of nitrogen and phosphorous Minimum presence of nitrates in effluent waters
MBR vs conventional plantComparison between the size of the two types of plants

PRE-ASSEMBLED CIVIL WASTE WATER TREATMENT PLANTS

Ecomarca manufactures a wide range of pre-assembled civil waste treatment plants consisting of: a) a tank (in reinforced concrete, fibreglass or steel), b) a membrane filtration unit, c) a control unit (see fig.).

Table of plant characteristics

MODEL A.E. BOD5 EFFECTIVE VOLUME DAILY FLOW HOURLY FLOW INSTALLED POWER TANK SIZE
Units n. Kg/d mc mc/d lt/h KWh cm
e-MBR 15 15 0,9 1 2,5 120 0,9 120 H 200
e-MBR 30 30 1,5 1,7 5,0 240 1,1 120 H 250
e-MBR 50 50 3,0 3,5 10,0 480 2,6 192 H 250
e-MBR 75 75 4,5 5,2 15,0 720 2,6 244 H 250
e-MBR 100 100 6 7 20,0 960 2,6 L325-P240-H250
e-MBR 150 150 9 10,5 30,0 1440 4,15 L325-P240-H250
e-MBR 200 200 12 14 40,0 1920 5,4 L560-P230-H250
e-MBR 250 250 15 17,4 50,0 2400 5,4 L560-P230-H280
e-MBR 300 300 18 21 60,0 2880 6,9 L720-P230-H250
e-MBR 400 400 24 28 80,0 3600 6,9 L720-P230-H280
e-MBR 500 500 30 35 100,0 4800 9,7 L860-P230-H280
Sistema Membrane Bio Reactorimpianto depurazione MBR

Reuse of purified water for civil purposes
Purified water can be reused in the following fields: WCs, gardening and watering, parks and golf courses, car wash, fire-fighting and other equipment.

Table of effluent parameters for civil plants

Project biological parameters Influent waste water Effluent waste water
BOD5 (mg/L) 300 <10
COD (mg/L) 600 <50
N totale (mg/L) 30 <10
SST (mg/L) 200 <5
P (mg/L) 10 <5
water reuse