The present invention is directed to the detection of problematic foaming and bulking bacterial species in the biological wastewater treatment process. By adjusting the waiting period a timely handover may be performed. All data elements and task definitions are sent to a master CPU of a master-slave distributed computing platform, wherein task definitions comprise at least one comparison parameter, at least one executable comparison element, and a query and a subject data element IDdescriptor. The high albedo material is configured to reflect more of the light than the low albedo material. According to the invention, the resolution of the depth images is increased by using the image data of the main image.