** Shares of Environmental Clean Technologies ECT.AX rise as much as 153.5% to A$0.18, marking its best session ever
** Sustainable technology developer's stock hits highest level since April 24, 2023 on acquiring Terrajoule for soil remediation tech
** Separately, co to raise A$3 mln ($1.98 mln) via two-tranche placements at A$0.06/share
** Announces transition of Faldi Ismail to executive chairman from non-executive chairman
** About 12.8 mln shares traded so far, nearly 32x the 30-day average
** Stock last up 97.2%; YTD, gain nearly 400%
($1 = 1.5158 Australian dollars)
(Reporting by Ananya Verma in Bengaluru)
((ananya.verma@thomsonreuters.com;))