Bubbleless aeration provides a high oxygen transfer rate and has a potential in treatment of high strength wastewater or wastewater containing volatile organic substances.
3
催化转炉减少了一氧化碳,氧化氮和挥发性有机混合物等的排放,而且无铅燃料的应用也当成为必要。
Catalytic converters reduce carbon monoxide, oxides of nitrogen, and volatile organic compounds in emissions and necessitated the use of lead-free fuel.