青云翻译

As China's urban sewage treatment rate increase, the sewage treatment plant sludge disposal has become a serious problem.

As the centralized urban sewage treatment rate in China increases, sewage treatment plant sludge disposal became a problem to be solved urgently.

Along with our country city sewage centralism processing ratio enhancement, the sewage treatment plant had surplus sludge handling the question which urgently awaited to be solved.

Along with the country's urban wastewater treatment, the increase in the rate of sewage treatment plants produce a residual sludge disposal has become urgent issue.

As the centralized urban sewage treatment rate in China increases, sewage treatment plant sludge disposal became a problem to be solved urgently.