JOHANNESBURG — After pouring brown, gritty liquid from a huge silver tank into a flute-like container known as a refractometer, South African beer brewing master Apiwe Nxusani-Mawela gives an expert nod of approval and passes it around to her students, who yell their observations with glee.
''When you are brewing you must constantly check your mixture,'' Nxusani-Mawela instructs them. ''We are looking for a balance between the sugar and the grains.''
The 41-year-old Nxusani-Mawela is an international beer judge and taster, and is believed to be the first Black woman in South Africa to own a craft brewery, a breakthrough in a world largely dominated by men and big corporations. Her desire is to open South Africa's multibillion-dollar beer-brewing industry to more Black people and more women.
At her microbrewery in Johannesburg, she's teaching 13 young Black graduates — most of them women — the art of beer making.
The science behind brewing
The students at the Brewsters Academy have chemical engineering, biotechnology or analytical chemistry degrees and diplomas, but are eager to get themselves an extra qualification for a possible career in brewing.
Wearing hairnets and armed with barley grains and water, the scientists spend the next six hours on the day's lesson, learning how to malt, mill, mash, lauter, boil, ferment and filter to make the perfect pale ale.
''My favorite part is the mashing," said Lerato Banda, a 30-year-old chemical engineering student at the University of South Africa who has dreams of owning her own beer or beverage line. She's referring to the process of mixing crushed grains with hot water to release sugars, which will later ferment. "It's where the beer and everything starts.''