Method and apparatus for preparing water for coffee brewing

Method of adjusting roasting of coffee, comprising the following steps:

• demineralizing water;
• adding at least two minerals to the demineralized water for generating roasting water, wherein the roasting water is used for brewing coffee during the method of adjusting roasting of coffee;
• roasting coffee beans by at least one first roasting parameter;
• brewing coffee with the roasting water and the coffee roasted with the at least one first roasting parameter;
• determining at least one parameter of the brewed coffee;
• and
• adapting the at least one roasting parameter based on the coffee brewed with the roasting water and the coffee roasted with the at least one first roasting parameter.

A coffee brewing apparatus, comprising:

• a brewing element have a brewing water inlet, a coffee powder inlet and an outlet for outputting the brewed coffee;
• a user interface configured to receive a user input for selecting a coffee-based beverage;
• a filter configured for demineralizing water drawn from a source and configured for outputing;
• at least two mineral reservoirs, wherein each mineral reservoir stores a fluid solving at least one type of minerals;
• a dosing device, wherein each mineral reservoir is connected by a dosing device to a conduit in which the demineralized water flows;
• and
• a controller configured to:
• receive from the user interface the coffee-based beverage selected by the user;
• retrieve from a database a suitable water recipe that is suited to the selected coffee-based beverage, wherein the water recipe defines a set mineral concentration of water to be prepared;
• and
• control the at least two dosing devices to prepare a brewing water based on the water recipe, wherein the dosing devices mineralize the water according to the water recipe for generating brewing water, wherein the prepared brewing water is fed into the brewing water inlet;
• wherein the coffee brewing apparatus further comprises a coffee outlet connected to the outlet of the brewing element for outputting the coffee-based beverage.

Method of brewing coffee, comprising the following steps:

• requesting a user to select a coffee-based beverage on an input device coupled to a coffee brewing apparatus;
• selecting a suitable water recipe from a database comprising a plurality of water recipes suited for brewing coffee, wherein the selected water recipe is suited to the selected coffee-based beverage, wherein the water recipe defines a set mineral concentration of brewing water to be prepared;
• requesting a water preparation unit to prepare a brewing water based on the water recipe, wherein the water preparation unit is adapted to mineralize the brewing water according to the set mineral concentration of the water recipe;
• preparing brewing water based on the water recipe;
• brewing the coffee-based beverage with the brewing water prepared according to the water recipe;
• measuring by a sensor at least one property of the coffee brewed by the predetermined water recipe;
• and
• determining an optimized water recipe based on the at least one measured property and the predetermined water recipe.