If inside has only an universal type of motor, it can work on DC from several batteries in series too. If it has a transformer for some control circuitry, it needs adaptations.
As already pointed out, if it's simply a motor then batteries would work but you'd need a huge amount, approx nineteen 12V batteries in series. Not really a practical solution.
Do you know what the power of the motor is? It looks quite small, maybe 200 W. You could probably run it from a single 12 V car battery using an inverter.
My guess would be that inverters are either very expensive or not available in India. However, if they are available then that is by far the best solution.
So you want to sell/process coconuts by the beach with no power outlets nearby, right ?
Warning : You may end returning a crappy inverter rated "12V" because it will NOT start unless the input voltage is really 13.8V or more from a running vehicle. Make sure the vendor proves to you it works on 10-12 Volt before buying.
Next choice is a gasoline powered 230V AC generator. Or pedal to your grinder...