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Ore flotation had been widely employed in sulphide ores selection. However, large amount wastewater produced by flotation processes had caused major problem to mine environment. Biofiltration was a cost effective and environmental friendly technology combining biodegradation and physical scrubbing that had become an outstanding alternative for decentralized area wastewater treatment. In this study,...
Aiming at the characteristics that slaughterhouse wastewater contains organic pollution and ammonia nitrogen with high concentration, the combined technological treatment of AB method and internal recycle BAF are adopted. The test studies hydraulic retention time (HRT) of section A and section B of AB method and the effect of influent water loading on the COD removal, effect of the HRT of internal...
The biology treatment process for the oil-containing wastewater of low concentration have produced by coal-to-liquids was studied. COD, oil, NH3-N, SS removing effect of PACT and ordinary active sludge process were compared. The research results show that: when the experimental conditions are the COD between 108–172mg/L, pH is 7, HRT is 10h, COD, oil, NH3-N, SS removing of rate ordinary active sludge...
In the paper, the integrated wastewater reclamation system of the combined biological aerated filter (BAF) and dynamic membrane (DM) technology was feasible and effective for dyeing and printing wastewater treatment. The experiment was carried out continuously under of the optimal condition of hydraulic retention time (HRT) of 1.0 h, pH of 7.0-8.5, temperature of 25-30°C and an air/water volume flow...
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,...
This paper is focusing on the investigation of a novel anoxicoxic hybrid membrane bioreactor (A/O HMBR) for the treatment of landfill leach ate. This new technique combined an efficient anoxic and oxic biological treatment process with a membrane filtration unit and has the advantages of simplifying pre-treatment facilities, relieving the loading of the subsequent treatment processes and optimizing...
The treatment of chemical effluent is very complex with respect to its characteristics. To treat this effluent, different processes like biological, chemical and physiochemical can be applied based on its characteristics. Attempt was made to reduce COD and TSS. To obtain the optimum removal of COD and TSS, different combinations of coagulant and polyelectrolyte were applied at the laboratory scale...
The effects of UV-Fenton preoxidation on the biodegradability of several phenolic wastewaters were investigated based on the ratio of BOD5/COD. The results showed that the BOD5/COD ratios of phenol, hydroquinone, 2-chlorophenol and coal-gas phenolic wastewater were less than 0.30, except for phenol in moderate concentration of 300mg/L, which mean that the phenolic wastewaters were difficultly biodegradable...
Membrane-making wastewater contains DMF, with high COD, toxicity and non-biodegradability. In this work, aerobic Fe-C micro-electrolysis and three-dimensional electrodes technology were applied for the pretreatment aiming to improve the biodegradability of the wastewater. It was found that the optional pretreatment conditions were pH 3 for Fe-C micro-electrolysis and pH 5 for the three-dimensional...
The fecundity of cod from the southern Baltic Sea in the late 1990s was estimated from 461 pairs of ovaries at the maturity stage IV (according to Maier′s scale). Number of eggs per female was estimated for different length, weight, and age classes of fish obtained from the ICES subdivisions: 25 (Bornholm Deep) and 26 (Gdańsk Deep). Absolute fecundity in relation to body length and age, as well as...
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