The MBR Book: Principles and Applications of Membrane

Table 3.14 O&M data, Pietramurata WWTP
3.2.6 Eawag pilot plant MBR, Kloten/Opfikon, Switzerland
Design 145
Parameter No a . Zenon Kubota Memcor
Membrane aeration 1–2 16.7 25.0 38 46 8
rate (Nm3 /h) 3 25.0 25.0 38 46 8
4 – – 38 46 – –
5 – – 28 – –
Cycle (min) 1–2 9 on/1 off 9 on/1 off 9 on/1 off
3 9 on/1 off 8 on/3 off – –
4 – – 9 on/1 off –
5 – – continuous – –
Net flux (LMH) b 1 7.2 28.8 6.3 28.4 9 31.5
2 9 30.6 7.6 11.9 21.6
3 8.6 14 6.9 16.7 – –
4 – – 8.6 9.5 – –
5 – – 16 37.5 – –
HRT (h) 1 4.1 16.5 10.7 42.9 4.5 14
2 4.5 14 18.1 18.1 11
3 10 13.4 10 22 – –
4 – – 18 – –
5 – – 5.5 8 – –
SRT (day) 1 35 40 8 20
2 8 20 8 15
3 15 20 – –
4 – – 12 – –
5 – – 9 12 – –
Derived data
Permeability 1 144 144 630 81 250 58
LMH/bar 2 138 61 167 264 300 200
3 123 108 276 239 – –
4 – – 264 271 – –
5 – – 320 100 – –
SADm 1 0.25 0.375 0.95 1.2 0.2
(Nm3 /(h m2 )) 2 0.25 0.375 0.95 1.2 0.2
3 0.375 0.375 0.95 1.2 – –
4 – – 0.95 1.2 – –
5 – – 0.7 – –
SADp (m3 air/m3 1 35 13 37 136 5.7 20.0
permeate) 2 28 12 87 113 8.3
3 44 27 50 100 – –
4 – – 110 100 – –
5 – – 19 44 – –
a Trial number; trials range between 2 and 9 months in duration.
b Temperature-corrected to 20°C.
Eawag (The Swiss Federal Institute of Aquatic Science and Technology) is a Swiss
national research organisation committed to ecological, economical and socially
responsible management of water. A pilot scale MBR was set up and operated