| 摘要 |
<p>. A purification process for removal of suspended solids, carbonaceous material, nitrogenous material, phosphorus, refractory organics, bacteria and viruses comprises of combining and carrying our the various biochemical and chemical reactions and separation of the suspended solids in a single sludge system in a simplified process sequence suitable for use in a single reaction tank. The biooxidation, nitrification, denitrification and chemical predipitation processes are carried out in presence of mixed microbial population entrapped into fluidized nonbiodegadable suspended solids with portion of the fluidized suspended solids circulating through three reaction zones having varying concentration of disolved oxygen to maintain enviromental conditions to support growth of the microbial population and simultaneously to maintain operating conditions required to carry out the involved reactions. The fluidized suspended solids entrap the active microorganisms, colloidal matter and suspended solids present in the incoming waste water and/or generated during purification of the waste water, improve the settling properties of the resulting sludge and enhance separation of suspended solids from the purified waste water. The concentration of the active microbial population in this purification process is significantly higher than that achieved by the prior art processes resulting in better performance, more efficient removal of pollutants and reduced treatment costs. The followed chemical oxidation provides for removal of remaining impurities and killing of bacteria and viruses.</p> |
