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A new process for reduction of waste sludge by ultrasound has been demonstrated. In former studies, ultrasound was mainly used for dehydration of waste sludge. Otherwise, it has been reported that ultrasound could efficiently provide a chance for excess sludge removal in reactor directly. Therefore, ultrasound was suggested to reduce waste sludge in SBR reactor in this paper. The results showed that...
This paper presents the research work of treating straw pulp gray water by ABR, The author examines the effects of COD removal rate at different hydraulic retention time,and different volume load by ABR, Results have shown: as the HRT is 8 h, COD removal rate is 40.5%, raises the biodegradability (BOD/COD)value from 0.25 to 0.52. Greatly improved the biodegradability of wastewater.
By investigating the nitrogen concentrations in effluents of the horizontal subsurface-flow constructed wetlands under the conditions of different kinds of substrates, residence time and heights, as well as the nitrogen concentrations changes along the flow in the wetlands, the nitrogen removal routes in the wetlands were analyzed. The results demonstrated that the wetland system with zeolites demonstrated...
The effects of Sequencing Batch Biofilm Reactor with polyurethane foam as microorganisms immobilized suspended carriers was tested under the optimal operation conditions, with aerobic, anaerobic, anoxic mode, texted and analysis the effluent indicators of TN, TP, NH4+-N, COD under the optimal conditions acerbic process, 2hr for aerobic process, 1hr for anoxic process, 10min for clarification, 5min...
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