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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...
In this work, the advanced treatment of the biologically treated wastewater of a textile plant using combination of ozonation and two-stage biological aerated filter (BAF) was studied. Comparing different ozone dosing methods, it was found that the integrated device including ozonation and BAF, allowed a higher COD (chemical oxygen demand) and color reduction. Comparing different treatment processes,...
Industries in particular generate enormous amount of wastes which can cause serious pollution in the environment. Water pollution mainly occurs due to the presence of dissolved inorganic materials, organic materials, other substances found in domestic and industrial wastewater and their subsequent products. The main objective of the wastewater treatment is to dispose the treated effluent without causing...
A preliminary study using gamma radiation on coking wastewater samples was carried out. Chemical oxygen demand (COD), biochemical oxygen demand (BOD) and Ammonia-nitrogen content results were obtained at different doses (1.0, 3.0, 5.0 and 7.0 kGy). As increase of the absorbed doses, a decrease of COD and BOD was observed after irradiation, whereas at the doses of 5 kGy and 7 kGy, the residual concentrations...
Supercritical(sub-critical) water oxidation technology is applied to degrade the explosive wastewater and low its chemical oxygen demand (COD). The technology optimum and reaction dynamics of TNT, RDX, HMX degradation have been investigated. The experiment results show that the optimum degradation technology is: reaction temperature T=648K, reaction time t=5min, the volume proportion of waste water...
The treatment of coal chemical wastewater by the two-stage anaerobic process was studied in this paper. The results showed that the removal efficiency of chemical oxygen demand (COD), total phenols (TP), and volatile phenol (VP) could reach 53.9%, 52.6%, 84.9%, respectively, which was significantly better than the single-stage anaerobic unit. The division of each unit was different in the two-stage...
As one of the heavily polluted industrial wastewaters tannery wastewater, which is difficult to handle especially in winter at low temperature, has attracted intensive attention all over the world recently. This work investigated the application of coagulation-flocculation to improve the treatment of raw tannery wastewater at low temperature (10??C). Parameters such as coagulant-flocculant combination,...
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...
Attempts were made in this study to examine the efficiency of Fenton process for treatment of wastewater generated from the production of papermaking tobacco sheet. Parameters affecting the Fenton process, such as initial pH, dosages of Fenton reagents and agitating time were investigated and optimized using jar-test experiments. 95.0% of color, 94.2% of turbidity and 78.9% of chemical oxygen demand...
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