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In this paper, the development of a portable system to perform real-time analysis of waste water is presented. This developed system can significantly determine the degree of water pollution by organic material by measuring Chemical oxygen demand. The system uses ultraviolet and visible light spectrum to correlate the absorbance of light in the chemical content of wastewater, which is used to estimate...
The treatment of high concentration organic wastewater by microwave Fenton process was studied in this paper. The input volume of Fenton reagent, microwave power, reaction time, initial pH value is investigated to study the impact of the effect of the high concentration organic wastewater treatment. The optimum condition of Microwave-Fenton oxidation is: the pH reaching 3, Fenton reagent composition...
In order to provide a theoretical support to operation and management for a wastewater treatment plant which wastewater is mixed with domestic sewage and industrial wastewater, some sludge activity or specific oxygen uptake rate (SOUR) impact factors such as temperature, pH, MLSS and hazardous chemicals etc. are researched on bio-treatment system in a wastewater treatment plant in Jiangnan. It is...
This paper studied the effect of microbial species grow speed(MPGS), soluble microbial populations(SMPs) on the excess sludge production in the oxic-settling-anoxic process (OSA process), a modification of conventional activated sludge process by inserting a sludge holding tank in a sludge return line. The OSA process may provide a cost-effective way to reduce excess sludge production in activated...
A chemical coagulatory coprecipitation method was used in the treatment of blast-furnace gas washing water. The treatment of gas washing wasterwater from iron and steel plant with polymeric aluminum-calcium chloride coagulation and coprecipitation united with PAM, at the same time the optimum quantity of agents and process conditions to treat such wastewater through experiments is established. The...
The technological parameters and running effect in the treatment of municipal sewage by an A2/O + Advanced treatment process are introduced and also aims to improve the application of the BIOLAK process in municipal wastewater treatment. The process flow, process parameters and structure size of the project were introduced. And the treatment effect and designing features were discussed. The running...
The coal mines of Henan province are surely abundant water mining areas in China. The problem of the waste groundwater is much serious too. Through synthetical analyses of the water chemical characteristics , water chemical environment and the water chemical origin of acid groundwater, this paper proposes the principle of chemical sulfer erasing technique which can process mine acid water and the...
The removal of reactive red 2 and methylene blue from aqueous solution was studied using soybean meal as an adsorbent. The effects of some parameters such as solution pH and contact time on the adsorption were investigated. The equilibrium time was found to be more than 60 min for equilibration. Equilibrium data conformed to the Freundlich, Langmuir and Redlich-Peterson isotherm models, where the...
A mathematical model of the PAC-UF membrane flux through a number of factors and quantitative characterization, based on Darcy's law, has been derived. Meanwhile, PAC-UF combined process was applied to treat Gan River micro-polluted raw water. Validity of the mathematical model is verified with the experiment. Furthermore, for different operation pressure and running time, the result shows that the...
Adsorption properties of Fe(II) and Mn(II) by palygorskite were investigated using a batch adsorption, and the effects of contact time, roasting temperature and acid concentration for activation on adsorption removal of Fe(II) and Mn(II) were studied. Results showed that the adsorption sites of palygorskite were well exposed to both kinds of metal ions, and the equilibrium adsorption was reached within...
The removal effect of Nitrobenzene in water by high voltage pulsed discharge was investigated. The high energy was injected into water, which could induce many chemical chain reactions. The active species could generate during the discharge course. With the conditions of increasing the discharge voltage and reducing the initial concentration of nitrobenzene, the removal rate of nitrobenzene increased,...
Chlorobenzene(CB), one of the persistent organic pollutants (POPs), is a refractory semivolation organic compound and non-biodegradable. Treatment of CB contaminated wastewater by traditional method is essentially impossible. In the study, the sono-photocatalytic degradation of CB was examined in aqueous suspension using the TiO2 as photo catalyst. Some factors affecting the degradation rate of CB...
The composite photo catalyst of Fe3+-TiO2-zeolite is prepared in a bench scale, which is immobilized into a zeolite matrix by means of sol-gel technique. The oilfield wastewater in Huabei oilfield was chosen as the model pollutant to evaluate photo catalytic activity under the ultraviolet light and sunlight irradiation respectively, the possible mechanism of photo catalytic oxidation was deduced....
Pulsed high-voltage discharges induce simultaneously several physical processes (UV light, shock waves) and chemical processes (active species and radicals such as °OH, °H, °O, °HO2, H2O2, O3, etc.), able to degrade harmful organic compounds in wastewater. This paper aims to compare various discharge types (either in the solution volume, or in the gas phase in close proximity to the liquid surface),...
Tannery effluent (sludge, wastewater) is treated by natural way. The waste sludge has been taken for the following two experiments, namely Neutralization process and Ferric alum treatment process. The alkali chemicals neutralized by pyroligneous acid which is obtained by pyrolysis process of wood. This sludge is sent out for drying. The dried sludge contains some biological waste and other organic...
This paper reported the synthesis of a new flocculant, a carboxymethyl guar through a rapid semidry process, using a natural guar gum as basic material. The factors which affect degree of substitution (DS) of carboxymethyl guar, such as the reaction temperature, the reaction time, the consumption of chloroacetic acid, and the consumption of sodium hydroxide etc were studied. The best synthesis condition...
In this paper, the degradation of 2,4,6-trichlorophenol (TCP) by hydrogen peroxide catalyzed by nano-iron was studied. Nano-iron was obtained through chemical reduction of FeSO4·7H2O and KBH4. The influences of pH, the concentration of H2O2, temperature, ionic strength and the amount of nano-iron on the degradation of TCP were investigated. The result showed that under the optimized condition, more...
A new kind of Cd2+-adsorption material was prepared using maifan stone by composite modification with chemical and heat treatment methods. The modified maifan stones were characterized by SEM and EDS. Effects of the modified maifan stone content, contact time and the initial pH of the solution on the adsorption of Cd2+ were studied. The research results show as follows: 1) The composite modified maifan...
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