This article provides an overview about the microbes selecting, types of bioreactors, the treatment condition, etc. which influence the odors abatement effect. In the recent past, many highly efficiency microorganisms on the actual governance of malodorous gases have been selected and trained. Among different bioreactor configurations, biofilters, biotrickling filters and bioscrubbers are most common ones. The membrane bioreactor and the three phase fluidised bed bioreactor as new bioreactors have broad development prospects. Finally, this review also provides how to insights into future R&D needs in this area.

The urgency of renovation the water mains from Malong Chemical Limited Company is analyzed. And the operation process with high density polyethylene pipe linings is described in this paper. The commentary on their respective advantages and the costs will be presented. It has been proved that the HDPE linings renovation technology has many advantages including shorter operation time, higher efficiency and lower cost with smaller and simpler operating equipments over conventional trenchless and replace pipe technology.