The treatment of baker’s yeast wastewater by an up flow anaerobic sludge blanket (UASB) reactor

Abstract

The objective of the research is to study the ability of baker's yeast wastewater (BYW) treatment by a Up Flow -Anaerobic Sludge Blanket (UASB) reactor. The effect of the temperature of BYW on the efficiency of treatment in aUASB was investigated and the experiments showed that it is possible to achieve good removal efficiency of chemicaloxygen demand (COD) (10200-16320) mg $L^{-1}$ when the temperature of BYW is about (35±2)°C and hydraulicretention time (HRT) = 24 h. The removal efficiency fit with temperature value of wastewater in UASB reactor for thefollowing values of temperature of (11±2; 16±2; 26±2; 26±2; 31±2; 35±2) °C. The removal efficiencies of COD were:(36.6%; 37.9%; 43%; 44.2%; and 48.8%) respectively. The effect of changing the values of HRT on the efficiencyremoval at a temperature (35±2) °C value was investigated. The experiments illustrated that it is possible to achievegood removal efficiency for high concentrations of COD when the temperature of the BYW is fixed at (35±2) °C andHRT>=24 h. The removal efficiency fits with HRTs values. For the following values of HRTs: (18; 24; 30; 36) h, theremoval efficiencies of COD were: (32.9%; 48.8%; 48.95%; 51.3%) respectively.