Objective To evaluate the decision process to perform staged or synchronous bilateral percutaneous nephrolithotripsy ( PCNL) in the treatment of bilateral upper urinary tract calculi. Methods Patients with an indicati...Objective To evaluate the decision process to perform staged or synchronous bilateral percutaneous nephrolithotripsy ( PCNL) in the treatment of bilateral upper urinary tract calculi. Methods Patients with an indication for bilateral PCNL were enrolled in the study展开更多
A study on a pilot plant accomplishing synchronous municipal sewerage sludge stabilization was conducted at a municipal sewerage treatment plant. Stabilization of sewerage and sludge is achieved in three step process:...A study on a pilot plant accomplishing synchronous municipal sewerage sludge stabilization was conducted at a municipal sewerage treatment plant. Stabilization of sewerage and sludge is achieved in three step process: anaerobic reactor, roughing filter and a microbial earthworm ecofilter. The integrated ecofilter utilizes an artificial ecosystem to degrade and stabilize the sewerage and sludge. When the hydraulic retention time(HRT) of the anaerobic reactor is 6 h, the hydraulic load(HL) of the bio filter is 16 m 3/(m 2·d), the HL of the eco filter is 5 m 3/(m 2·d), the recycle ratio of nitrified liquor is 1 5, the removal efficiency is 83%—89% for COD Cr , 94%—96% for BOD 5, 96%—98% for SS, and 76%—95% for NH 3\|N. The whole system realizes the zero emission of sludge, and has the characteristics of saving energy consumption and operational costs.展开更多
文摘Objective To evaluate the decision process to perform staged or synchronous bilateral percutaneous nephrolithotripsy ( PCNL) in the treatment of bilateral upper urinary tract calculi. Methods Patients with an indication for bilateral PCNL were enrolled in the study
文摘A study on a pilot plant accomplishing synchronous municipal sewerage sludge stabilization was conducted at a municipal sewerage treatment plant. Stabilization of sewerage and sludge is achieved in three step process: anaerobic reactor, roughing filter and a microbial earthworm ecofilter. The integrated ecofilter utilizes an artificial ecosystem to degrade and stabilize the sewerage and sludge. When the hydraulic retention time(HRT) of the anaerobic reactor is 6 h, the hydraulic load(HL) of the bio filter is 16 m 3/(m 2·d), the HL of the eco filter is 5 m 3/(m 2·d), the recycle ratio of nitrified liquor is 1 5, the removal efficiency is 83%—89% for COD Cr , 94%—96% for BOD 5, 96%—98% for SS, and 76%—95% for NH 3\|N. The whole system realizes the zero emission of sludge, and has the characteristics of saving energy consumption and operational costs.
