You don't necessarily need that active circuit. In many cases you'll be able to directly connect the piezo to Bela's input simply using resistors. A reasonably large series resistor (e.g.: 4k7) can be used to protect the input from any over voltage coming from the piezo. If connecting to an audio input, the series resistor is all you need. if connecting to an analog input, you'll also need to bias the input to around 2V. This can be achieved with a resistor divider down from 3.3V, e.g.:
3v3
|
R1 1M
|
| 4k7
piezo+ ---+----R3----+ Bela analog in
|
R2 1M5
|
piezo- ---GND
where R1 and R2 provide about 1.98V biasing, while R3 provides protection.
If going the active preamp way, keep in mind that on Bela you shouldn't use 5V for anything noise-sensitive, like the resistor divider in your schematic, you should use 3.3V there, correspondingly reducing the value of the top 100k resisto. You can still use 5V to power the opamp.