EXPERIMENTAL-STUDY OF HIGH-RATE POND SYSTEM TREATING PIGGERY WASTE-WATER

The results of an experimental study conducted in a full-scale high ra te pond system treating piggery wastewater at Jianfengshan Piggery, Pa nyu City, Guandong Province, are presented. The system consists of two advanced anaerobic ponds (AAP) in parallel, followed by an anaerobic transformation pond (ATP) and a five-cell algae-bacterial pond (ABP). The mechanism of the AAP is described and the hydraulic flow pattern a nalyzed. Fermentation pits (FP) built on the bottom performed very eff iciently, operating like UASB in principle. A new concept of ATP is ad vanced, based on its ability to transform poorly degradable materials to more easily degradable ones. It was found in the study that the HRP system was more efficient, more reliable and saved 40% land area comp ared with a conventional pond system. Economic analyses of both the en ergy consumption and the benefit to the pond system of fish farming ar e also included in the paper. Copyright (C) 1996 IAWQ. Published by El sevier Science Ltd.