Biological Treatment of Spent Vegetable Tannins with Fungal Dominant System.

摘要

Feasibility of aerobic biological treatment of spent vegetable tannins with primarily fungal culture was investigated. Growth rate of cells,yield coefficients,oxygen uptake rate,specific substrate utilization rates,sludge settleability,and process performance in a mixed culture with a high percentage of fungi under various conditions of detention time,organic loading,and pH of the reaction were examined. Laboratory batch culture work was followed by two continuous flow bench-scale reactors, (10liter capacity). Continuous flows culture treatment determined 10days as the optimum detention time for best removals of organics at a tannic acid level of 5,200mg/l. Sludge settling characteristics improved at higher detention times. Spent vegetable tannins were biodegradable by an adapted fungal culture and appropriate for biological treatment in an external aeration type activated sludge process. (Portions of this document are not fully legible) (Color illustrations reproduced in black and white)