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With the increasing demand for energy, dwindling oil reserves and global warming, the current fossil fuel based mechanical power and electricity has caused severe environmental degradation and energy shortage. Renewable, non-polluting and biodegradable energy sources must be adopted. Producing biodiesel from algae which represents the third bio-energy feedstock appears to be the most straightforward...
The biosorption of reactive red on acid-treated Penicilium sp. was investigated in a packed-bed column. The column experiments were conducted to study the effect of operating parameters such as initial dye concentration, adsorbent dose and flow rate on the column removal capacity. The Thomas model was used to analyze the experimental data. Column experiments showed that the fungal mycelia mixed with...
A biological activated carbon (BAC) filter was designed for treatment of micro-pollutants in Songhua River. The goal of the study was to characterize bacterial diversity over time and in different spatial regions of the filter and evaluate the effects on BAC performance. The bacterial activity varied over time and the length of the filter. SEM results showed biomass of BAC filter increased during...
Immobilized microorganism technology is an effective method of removing water pollutant in source waters. The effect of biologically immobilized ceramic particles is better in removing the pollutant than simple filter or engineering bacteria liquid, due to the two factors including the adsorption and entrapment function of the filter materials in the biofilter and the biodegradation of the microorganisms...
In this paper, start-up of fiber activated carbon for natural start-up in a dynamic flow was discussed, and several physical-chemical, biochemical and microbiological methods (indicators), such as NH3-N, NO2-N, UV254, CODMn, DOC and AOC, were used to characterize the BAC biofilm's composition and activity. The results showed that the mature biofilm was observed after 53 days of incessant operation...
Catalytic ozonation/biological activated carbon process was applied for advanced drinking water treatment in this study. The results showed that with the ozone dosage of 2.0mg/L, the removal of CODMn, TOC and UV254 in catalytic ozonation unit was 24.6%, 15.9% and 59.8%, and increased to 40%, 16% and 68% respectively after being treated by BAC. The catalytic ozonation unit contributed to more than...
Effects of initial nitrate concentrations and heavy metals on autohydrogenotrophic denitrification were investigated in batch tests to eliminate nitrate from the contaminated drinking water. Nitrate was reduced completely without nitrite accumulation at low initial concentration of nitrate (15 mg N/L), with nitrite accumulation at intermediate initial concentrations (70, and 100 mg N/L), and the denitrification...
Two different granular activated carbon (GAC) filters were utilized to investigate the removal efficiency of bromate and natural organic matters (NOM) during the transition from fresh GAC to the biological activated carbon (BAC). The removal efficiency of bromate, nitrate, UV254, DOC, and trihalomethane formation potential (THMFP) in GAC filter apparently decreased during the transition from fresh...
Three types of activated carbons were used in O3-BAC process for the advanced treatment of the Miyun Reservoir water. The experimental results showed that both crushed carbon and cylindrical carbon met the requirement of O3-BAC process, and the quality of the effluent from activated carbon columns was improved. On the condition of adequate dissolved oxygen (DO), the structure of carbon was not concerned...
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