Effect of preparation conditions and washing of activated carbon from paper mill sewage sludge on its adsorptive properties.

Sludge-based activated carbon (SAC) was prepared from paper mill sewage sludge by physical activation with steam for wastewater treatment in this study. The effects of preparation variables, including carbonization temperature, carbonization time, activation temperature and activation time, on iodine number and yield were investigated through orthogonal experiments. The influences of washing by deionized water and acid on the characteristics and adsorption capacities of SAC for phosphate, methylene blue and reactive red 24 were also studied.

Microbial treatment of the monosodium glutamate wastewater by Lipomyces starkeyi to produce microbial lipid.

The monosodium glutamate (MSG) wastewater as a medium was treated by Lipomyces starkeyi to produce microbial lipid in the study. The effect of related factors (initial glucose concentration, inoculation concentration, initial culture pH, and cultivation time) on biomass, lipid production and lipid content was discussed, respectively. According to the experiments, the optimal fermentation conditions were determined: addition of 80g/L glucose, 10% inoculation concentration, initial pH about 5.