Process and device for the treatment of wastewater from food processing, especially washing fluids from breweries

摘要

The particles of size >= 150 mu m are filtered by the hydrocyclone filter (1) and the particles of size >= 0.4 mu m are filtered by the fine filter. A part of the filtrate of the solution from the hydrocyclone filter is supplied into the fine filter (13) through a feed container (14). Unfiltrate part of the solution is resupplied into the hydrocyclone and fine filters for obtaining fully filtered caustic solution supplied into bottle cleaning machine. The filtrate (60-80%) from the hydrocyclone filter are supplied directly to the main caustic solution and 20-40% of the filtrate from the hydrocyclone filter is supplied to the fine filter. Wastewater from underflow of the hydrocyclone filter is supplied to a prepurifying bath of the bottle cleaning machine. Independent claims are included for: (1) device for preparing cleaning caustic solution; and (2) bottle cleaning machine.