Five new synonyms for (Balsaminaceae) in China.

In the revision on the genus L. in China, we found that there were synonyms amongst some species. Franch.

 (Balsaminaceae), a new species from Guizhou, China.

(Balsamianceae), belonging to I.subgen.Impatiens, is recognised as a new species from Guizhou, China and it is described and illustrated.

 (Balsaminaceae), a new species from karst plateau in Guizhou, China.

X.X. Bai & L.

[Cultivation and enrichment of denitrifying phosphorus removal bacteria (DPB) in denitrifying biological nutrient removal process].

The cultivation of the denitrifying phosphorus removal bacteria (DPB) in biological nutrient removal system will directly affect the removal efficiency of the nutrients in wastewater such as nitrogen and phosphorus, and the stability of the process. For this reason, a new BNR process, which is called double-sludge denitrifying-nitrogen and phosphorus removal process, was designed. In order to create a good anaerobic/anoxic alternating environment for DPB, gradual transition of training methods were used to make DPB natural selection, and then finally, screened the dominated DPB bacteria.

Phosphorus accumulation by bacteria isolated from a continuous-flow two-sludge system.

In this article, polyphosphate-accumulating organisms (PAOs) from a lab-scale continuous-flow two-sludge system was isolated and identified, the different phosphorus accumulation characteristics of the isolates under anoxic and aerobic conditions were investigated. Two kinds of PAOs were both found in the anoxic zones of the two-sludge system, one of them utilized only oxygen as electron acceptor, and the other one utilized either nitrate or oxygen as electron acceptor. Of the total eight isolates, five isolates were capable of utilizing both nitrate and oxygen as electron acceptors to uptake phosphorus to some extent.

Simultaneous phosphorus and nitrogen removal in a continuous-flow two-sludge system.

The ability of simultaneous biological phosphorus and nitrogen removal was investigated in a lab-scale continuous-flow two-sludge system. Alternating anaerobic and anoxic conditions were combined with contact oxidation stage for treating raw municipal wastewater. Long-term experiments showed that the contradiction of competing for the organic substrate between denitrifying bacteria and PAOs (phosphorus accumulating organisms) in traditional phosphorus and nitrogen removal system has been resolved.