论文摘要翻译（请不要用翻译工具）

Coal coking wastewater is coke, gas purification and coking products produced in wastewater recycling process, its composition is complicated and contains a lot of high pollution, degradation of organic pollutants to the tricky, belong to industrial wastewater. This study adopts different processing methods in different experimental conditions treatment for a coke deep treatment of wastewater, by means of measuring the COD and chromaticity, compare the treatment effect of various processing method.

First, choose FeSO4 as a coagulant, utilizing the single factor analysis of coking wastewater through coagulation precipitate experiment. By analysing the experimental research, determined the best strategy of coagulant Fe2 + optimal conditions: 200mg/L dose for cast, best pH value for 7. At this time, the chroma of coking wastewater achieved respectively COD removal efficiency and removal around 60% and 38%.

Secondly, choose Fe2 + / NaClO as oxidants to coking wastewater through chemical oxidation experiment. Utilizing the single factor analysis and the experimental research, drug NaClO best shots to determine 2mL/L, best pH value for Fe2 + 4, best shots for 80mg/L, dose for 10min best reaction time, reaction temperature for best 25oC.

Again, of coking wastewater through ozone oxidation experiment. Determine the relationship with voltage ozone production in a fixed voltage conditions ozone oxidation experiment, obtains the best time for 15min oxidation.

Finally, are chosen and polymerization FeSO4 PAC (PAC) as a coagulant, using the coagu-flocculation precipitation and ozone oxidation combined craft, investigation process of wastewater chroma of the order of the influence of COD removal efficiency and removal.

Keywords: coking wastewater, decolouring, COD removal, depth processing