Combination of powdered activated carbon and powdered zeolite for enhancing ammonium removal in micro-polluted raw water.

Even zeolite is promising in ammonia pollution disposing, its removal efficiency is frequently interfered by organics. As activated carbon has good removal efficiency on organic contaminants, combination of two adsorbents may allow their respective adsorption characteristics into full play. This paper provides a performance assessment of the combination for enhancing ammonium removal in micro-polluted raw water.

[Nitrate removal from wastewater using rice straw as carbon source and biofilm carrier].

In this research,agriculture waste-rice straw was investigated as the sole carbon source as well as biofilm carrier to remove nitrate from wastewater in up-flow laboratory reactors. The experimental results indicated that the startup of the system was quick and a high nitrate removal efficiency was observed. The accumulation of nitrite was not observed in this process.

The biological activity of antibacterial substance produced by Enterobacter cloacae B8.

An antibacterial substance was extracted and purified from the culture of Enterobacter cloacae B8 and the antagonistic activities of the extract to 229 clinical pathogen strains was tested by the K-B paper-dish method. The extract of Enterobacter cloacae B8 showed strongly antagonistic activity to all 146 tested stains of Staphylococcus spp.; the antagonistic diameter was about 18-32 mm, averaging about 26.