"A tank is enough to get you around the region for the day, but you have to plan ahead," Martin Risberg, a county engineer, said as he filled a biogas Volvo.
The biological purification tank combined of artificial wetland technique and the bio-contact oxidation method was applied for malodorous river water in central urban region of Shanghai City.
将人工湿地技术与生物接触氧化法相组合的生物净化槽应用于上海市中心城区黑臭河水净化。
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An analysis is made on the influence of low temperature environment on the property of natural gas spherical tank used in the frigid region.