Experiment on microbial degradation with two kinds of biological process, hydrolytic acidification-aerobic process and aerobic process was conducted to treat the anthraquinone dye wastewater with COD Cr concentration ...Experiment on microbial degradation with two kinds of biological process, hydrolytic acidification-aerobic process and aerobic process was conducted to treat the anthraquinone dye wastewater with COD Cr concentration of 400 mg/L and chroma 800. The experimental result demonstrated that the hydrolytic-aerobic process could raise the biodegradability of anthraquinone dye wastewater effectively. The effluent COD Cr can reach 120170 mg/L and chroma 150 which is superior to that from simple aerobic process.展开更多
The degradation kinetics of strains P05 and P07 and the degradation effects of mixed strain on Microcystis aeruginosa were studied. The results showed that: (1) The degradation processes of strains P05 and P07 on Micr...The degradation kinetics of strains P05 and P07 and the degradation effects of mixed strain on Microcystis aeruginosa were studied. The results showed that: (1) The degradation processes of strains P05 and P07 on Microcystis aeruginosa accorded with the first-order reaction model when the range of Chl-a concentration was from 0 to 1500 μg/L. (2) The initial bacterium densities had a strong influence on the degradation velocity. The greater the initial bacterium density was, the faster the degradation was. The degradation velocity constants of P05 were 0.1913, 0.2175 and 0.3092 respectively, when bacterium densities were 4.8×10 5, 4.8×10 6, 2.4×10 7 cells/ml. For strain P07, they were 0.1509, 0.1647 and 0.2708. The degradation velocity constant of strain P05 was higher than that of P07 when the bacterium density was under 4.8×10 5 cells/ml, but the constant increasing of P07 was quicker than that of P05. (3) The degradation effects of P05 and P07 strains did not antagonize. When the concentration of Chl-a was high, the degradation effects of mixed strain excelled that of any single strains. But with the decrease of the Chl-a concentration, this advantage was not clear. When the concentration was less than 180 μg/L, the degradation effects of mixed were consistent with that of strain P07.展开更多
By studying the air quality in the public traffic area of Shanghai, the harm to people''s health caused by particulate pollution in Chinese cities has been evaluated. In addition, two devices were developed to...By studying the air quality in the public traffic area of Shanghai, the harm to people''s health caused by particulate pollution in Chinese cities has been evaluated. In addition, two devices were developed to test the performance of protective mask against ambient aerosol, and the efficiency of recycle filtedng of the air-condition was contrastive tested with the new filtration material. The results show that these protective measures need to be improved because that filtering efficiency of protective mask and air-condition in miniature is too low to filter superfine particles in ambient air.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Experiment on microbial degradation with two kinds of biological process, hydrolytic acidification-aerobic process and aerobic process was conducted to treat the anthraquinone dye wastewater with COD Cr concentration of 400 mg/L and chroma 800. The experimental result demonstrated that the hydrolytic-aerobic process could raise the biodegradability of anthraquinone dye wastewater effectively. The effluent COD Cr can reach 120170 mg/L and chroma 150 which is superior to that from simple aerobic process.
文摘The degradation kinetics of strains P05 and P07 and the degradation effects of mixed strain on Microcystis aeruginosa were studied. The results showed that: (1) The degradation processes of strains P05 and P07 on Microcystis aeruginosa accorded with the first-order reaction model when the range of Chl-a concentration was from 0 to 1500 μg/L. (2) The initial bacterium densities had a strong influence on the degradation velocity. The greater the initial bacterium density was, the faster the degradation was. The degradation velocity constants of P05 were 0.1913, 0.2175 and 0.3092 respectively, when bacterium densities were 4.8×10 5, 4.8×10 6, 2.4×10 7 cells/ml. For strain P07, they were 0.1509, 0.1647 and 0.2708. The degradation velocity constant of strain P05 was higher than that of P07 when the bacterium density was under 4.8×10 5 cells/ml, but the constant increasing of P07 was quicker than that of P05. (3) The degradation effects of P05 and P07 strains did not antagonize. When the concentration of Chl-a was high, the degradation effects of mixed strain excelled that of any single strains. But with the decrease of the Chl-a concentration, this advantage was not clear. When the concentration was less than 180 μg/L, the degradation effects of mixed were consistent with that of strain P07.
文摘By studying the air quality in the public traffic area of Shanghai, the harm to people''s health caused by particulate pollution in Chinese cities has been evaluated. In addition, two devices were developed to test the performance of protective mask against ambient aerosol, and the efficiency of recycle filtedng of the air-condition was contrastive tested with the new filtration material. The results show that these protective measures need to be improved because that filtering efficiency of protective mask and air-condition in miniature is too low to filter superfine particles in ambient air.
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.
