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Complex ecological floating bed technology is a new water treatment technology, generally constituted by aquatic plants and packing. The complex ecological floating bed degradation of pollutants in water, to ensure water effect, more adaptive processing water. Due to the the composite floating bed both decontamination and landscape effects, is widely used in reservoirs, rivers, lakes and other pollution of water bodies. This article focused on the nature of the micro-polluted source water body to build composite floating bed, through the experimental study of the best operating conditions, and the composite floating bed applied to pilot test. The main findings of this paper are: analysis, research the best combination of fillers and floating bed by removal of pollutants. The results show that the upper floating bed, the lower filler combination is better than any other combination, better decontamination efficiency and operability. The combination have an advantage compared to the other combinations in terms of removal of turbidity and ammonia, COD and total phosphorus removal at a high level. COD, turbidity, ammonia nitrogen and total phosphorus removal rates were 32%, 84%, 63% and 29%, respectively, follow-up test using the combination test; under other operating conditions, the the composite floating bed system best Aeration amount. Through the system in the amount of aeration respectively to 3.5L/min 5L/min, the, under 8L/min and 13.5L/min the contaminant removal effectiveness analysis shows, turbidity, COD and total phosphorus removal rate The turning point for 5L/min. Less than the amount of the aeration, the law of the system pollutant removal increased with increasing aeration rate, higher than the amount of aeration, with the increase of the aeration amount, removal apparent decline. The ammonia removal efficiency turning point is 8L/min. Comprehensive analysis of the complex ecological floating bed optimum aeration rate 5L/min, and turbidity, ammonia, COD and TP removal rates were 76% in the amount of aeration, 62%, 39% and 40% removal efficiency is better; study composite floating bed system in the amount of aeration under 5L/min best hydraulic loading. The test results show that the system can get better decontamination system hydraulic loading of 2m3 / (m3.d), turbidity, ammonia, COD and TP removal rate was 78%, 71%, 36% and 40%; aeration rate 5L/min, hydraulic loading 2m3 / (m3.d) the under research systems stage aeration feasibility. The data analysis showed that stage aeration pre pollutant removal efficiency decreased to some extent, and ammonia nitrogen, COD and TP removal decreased greatly, certain impact on water quality, post-processing efficiency gradually recovery. Environment, weather conditions permitting, can stage aeration, in order to minimize power consumption; the planted float picking effect is not obvious whether or not to remove the turbidity, ammonia nitrogen and total phosphorus, but the COD removal efficiency decreased and in the trial late to return to the level before picking. Late in the trial, due to the growth of new water spinach plant tillering favor enhanced floating bed plants decontamination system water quality impact of the gradual elimination. The new growth of the plants have new growth of roots and stronger photosynthesis, removal of certain pollutants than before picking results, such as the complex ecological floating bed late in the test were higher than the same period for the removal of COD and ammonia are not Picking group and picking former level. Regular picking in the day-to-day management of the floating bed floating bed plants growth situation, so that it can be durable to play a role, picking should avoid violent disturbance floating bed plants and packing; composite ecological floating bed in the trial early on the water body's purification effect of poor water quality has improved to some extent with the step-by-step through the growth of the floating bed plants filler hanging film, basically to achieve the desired treatment effect.
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