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A laboratory-scale biofilter was used to treat waste gas containing NH3. Its performance, transformation mechanisms and microbiological characteristics were investigated in this study. The inlet concentration of ammonia varied from 20∼300mg/m3, and the air flow rate were 0.61m3/h, 0.85m3/h and 1.06m3/h, equivalent to empty bed residence time of 35s, 25s and 20s. The experimental results showed that...
Airborne microorganisms in four different units (rack chamber, aeration tank, sludge thickening tank and sludge dewatering facility) in certain wastewater treatment plant in Beijing were chosen as research object and their distribution characteristics were studied. Results showed that the concentrations of heterotrophic bacteria and fungi in different units had significant differences. The aeration...
In undeveloped rural areas, the construction of wastewater treatment devices was restricted for shortage of investment. This paper begins with a brief introduction to the concept of financing and financing models, as well as the three elements of financing, involving financing main body, financing channels, and financing mode. And then, the popular financing models, especially the project financing...
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