** De.mem DEM.AX jumps 7.7% to A$0.14; set for biggest intraday pct gain since January 28
** Wastewater treatment business signs new distribution agreement with Singapore-based Firmbase
** Gets first commercial order for its filtration systems from China, highlighting entry into the ~$2 billion Chinese home water filtration market
** Says agreement allows co to enter key Asian markets in China, Indonesia and Japan
** DEM gained 7.7% last month
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com;))