| http://www.w3.org/ns/prov#value | - To this end, the pH of the liquid as either contained in or taken out of the vessel having the grinding mechanism is detected and an alkali is added in an amount that is controlled such as to maintain a pH of at least 9, desirably 10 or more, either by adjusting the opening of a valve such as a flow control valve or the on-off intervals of injection (if the alkali is in aqueous solution) or by adj
|
