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The aim of this study was to design a remediation technique using both soil washing and microbial degradation to remove polycyclic aromatic hydrocarbons (PAHs) from contaminated soil. PAH biodegradation by inoculation of Mycobacterium sp. was first tested. The effectiveness of washing agents (Tween 80 solution, biodiesel, and a two-phase partition system (TPPS)) was then evaluated...
Aiming at the status that the pollution of wastewater from livestock and poultry raising is going from bad to worse in China, some treatment technologies such as irrigation to farmland, natural treatment and industrialized treatment were reviewed. Considering the practical situation in China, it was suggested to currently prioritize irrigation to farmland and natural treatment. To establish databases...
Using the shear strength reduction(SSR) finite element method(FEM), the safety factor (SF) of a homogeneous slope was calculated, the results showed that the differences were inevitable because of the different adopted instability criteria and personal judgments, even if the same criterion was used. According to analyzing the characteristics of energy conversion during the slope deformation, an abrupt...
Large numbers of antibiotics were used as food additives and veterinary medicines. Most of these antibiotics could not be absorbed by animals and were discharged through dejeeta in the original shape or metabolized forms. At last these antibiotics entered into soil environments in different routes and accumulated in soil. Antibiotics have become the emerging contaminants of soil. To evaluate the potential...
The underground infiltration sewage treatment system has invests, the equipment to be simple few, the expense is low, management simple and so on characteristics. Through increase voluntarily the development's microorganism microbial inoculum improvement soil character and in the enhancement underground infiltration system microorganism activeness, and carries on the microbial inoculum the physiological...
In order to promote regional sewage pipe network and sewage incomplete dispersion area sewage treatment, biological purification and filtration combined with underground, a small modular ecological design of sewage treatment facilities. In the winter day the water content of 100L/d under the conditions studied the effects of their purification. The results showed that, when COD, NH4+-N, TP influent...
The process and systematical design issues about dispersive domestic sewage were discussed. By using floatation biological bed and combined subsurface infiltration treatment processes together, the dispersive domestic sewage could be converted into regeneration water for using. It has economical and ecological benefit.
Two kinds of pilot subsurface wastewater infiltration system (SWIS), named group A and group B were constructed in the laboratory. Group A was filled with mixed substrates composed of 80% meadow brown soil (MBS) and 20% cinder, while 80% MBS and 20% sand in group B. Both of the SWIS worked stably in an intermittent feeding mode during the period of the experiment. Under the hydraulic loading of 8-10m...
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