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The degradation and its kinetics of chlorine chlorination of phenol in disinfection process was studied. The influencing factors were investigated, such as chlorine dosage, temperature and background organic compound and so on. The experimental results showed that the degradation of phenol by chlorine followed second-order kinetics. The temperature influenced the reaction sharply, and it followed...
Surfactants were the important contaminants in wastewater and influenced oxygen transfer in aeration processes. The effects of four types of surfactants, including anionic, zwitterionic, cationic and nonionic surfactants, on oxygen transfer in microbubble aeration were investigated and compared with traditional bubble aeration. The results indicated that the oxygen transfer was enhanced with and without...
The present work consisted in the study of Titania/Zeolite catalyzed ozonation for nitrobenzene removal. Catalytic activity of the supported TiO2 is strongly influenced by the heat treatment temperature. Titania/Zeolite calcined at 600??C showed the best activity. An approximate increase of 21% in removal rate was achieved for catalytic ozonation compared with single ozonation. Kinetic study of dissolved...
This study has investigated the effect of humus soil activated sludge on the nitrogen and phosphorus removal. The results from experiments indicate that humus soil SBR (HS-SBR) process did not have a better effect on the COD removal compared it with SBR process. They had about 89% removal efficiency on average. HS-SBR process could enhance the removal of nutrient salt, especially TP. The removal efficiency...
Phoslock is a specially modified clay product, designed for permanently removing soluble phosphorus (SP) from water body, as the SP is a main driver for algae bloom. On-site pilot-scale trial on Phoslock application for Lake Dianchi water has demonstrated Pholsock is a very effective agent in SP removal from Lake Dianchi water. From the on-site pilot-scale trial, Phoslock can either quickly remove...
The treatment performances of capillary infiltration system fed by municipal wastewater were investigated in this paper. The composite fillers were constructed in capillary infiltration system to reach the prospective treatment effects. Compared to the single filler, composite filler promoted the ventilating condition and improved the distribution situation. The higher treatment efficiencies of NH...
A new high-rate dissolved air flotation (DAF) tank was developed and the efficiency was studied through pilot experiments. The turbidity of effluent water was improved 30% at hydraulic loading rate of 18 m/h when the perforated pipe was replaced by perforated plate for the collection of effluent water. A separation system made by a series of lamella plates was installed at the middle part of separation...
Three different operation modes were used in vertical flow constructed wetland system treating rural wastewater. The results showed that, low water level operation can provide more oxygen for organic matter and NH4+-N removal, but lack of the anoxic condition for denitrification. Remarkable removals of organic matter, NH4+-N and TN were achieved under the cyclic batch operation. Due to the lack...
The purpose of this study was to choose a fine chemical to efficiently remove ammonia nitrogen from the ammonia water in AS Process, which provides a new available approach to treat coking wastewater. The experiment adopted "Air Stripping and Adsorption" to remove ammonia nitrogen from the ammonia water, and studied the reaction temperature T, pH, the time of stripping t, the dosage of the...
Wood extractive brings more difficulties on the treatment of polluting wastewater from wood industry and paper mill, Therefore, many enterprises have to raise pretreated procedure of wood chips of papermaking to decrease the disadvantageous impacts from wood extractive. However, wastewater from wood chip pretreatment becomes a difficult and urgent issue. Eucalyptus camaldulensis has been widely planted...
In order to study the treatment of dye wastewater by foam fractionation, basic violet 5BN was used as a model system, and Sodium Dodecyl Benzene Sulphonate (SDBS) was selected as the collector in this paper. In the optimal condition, the enrichment rate was 61.81, and the decolorization rate (R) was 92.53%. The decolorization rate, the flow rate and concentration of foamate, and the decolorization...
As fungicides or preservatives in pharmaceutical and personal care products (PPCPs), triclosan (TCS) is widespread in the environment. Under low concentration, the toxicity of triclosan is not obvious, but under certain conditions, it can be converted into other substances, whose toxicity has already caused concerns. A method for analysis of tricosan in water using solid phase extraction (SPE) and...
The E-Z Solutions mobile medical wastewater treatment device was designed to treat medical wastewater accumulated from surgical operations on disaster relief vehicles in the event a viable sewer connection is unavailable. The device will prevent the spread of disease and other contaminants through wastewater by utilizing multiple filtration steps and the application of germicidal Ultraviolet (UV)...
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