The biodegradation performance of a novel photosynthetic bacterial biofilm reactor for hydrogen production using glucose as the sole carbon source during the start-up stage and steady operation stage was investigated experimentally.The effects of operation parameters,such as light intensity,light wave length,inlet substrate concentration,temperature and pH of the substrate medium on the biodegradation efficiency of the photosynthesis hydrogen production biofilm reactor were studied respectively.The experimental results showed that the glucose elimination capacity of the bioreactor increased rapidly in the biofilm formation stage,then fluctuated in the growth stage,and finally kept almost constant in the stabilization stage.The biodegradation efficiency of the photosynthesis hydrogen production biofilm reactor increased with the increase in light intensity,inlet substrate concentration,temperature and pH till the biodegradation efficiency reached a maximum value.Then the biodegradation efficiency decreased with the increase in these parameters.In addition,light wave length had significant influence on the biodegradation efficiency.
The Purification experiments of waste gas containing low concentration toluene were made in trickling biofilter with ceramic spheres.The effects of liquid flow rate, gas flow rate, pH of circulation liquid, and toluene concentration in inlet gas on the purification efficiency of trickling biofilter were investigated.The pressure drop of the trickling biofilter was also measured during experiments. Increasing liquid flow rate and gas flow rate resulted in the decrease of purification efficiency of trickling biofilter.The highest purification efficiency of trickling biofilter was found at the circulation liquid pH of 7.The porosity of the packing material at the inlet of gas was higher than that at the outlet of gas in biofilter after continuous operation in 50 days. The decrease in the porosity of packing material caused a great increase in the pressure drop of the biofilter.
