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Research about Rural Sewage Treatment by Technology A~2/O Driven by Solar Energy

Author: HeXiJun
Tutor: TianGuangMing
School: Zhejiang University
Course: Environmental Engineering
Keywords: solar energy A2/O technology different weather conditon hydraulic loading
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 18
Quote: 0
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Abstract


This research directs at curret situation that the efficiency of current rural sewage treatment technology which is always used is low and current situation that the high cost of urban sewage treatment technology when used in rural area.It conbines solar technology and A2/O technology that treats rural sewage to treat rual sewage. It introduces solar energy as new energy to supply power for oxygen aeration to overcome the bottleneck of operating cost,in order to develope new technology treating rural sewage.This research unfolds in three sides. Firstly, analysis of features of current rural sewage treatment technology and the charactersitics of match using solar energy to strengthen funtion.Secondly,it mainly researchs the effect of different weather condition has on generation of solar energy and aeration effect.Thirdly, it researchs the treatment effect of A2/O technology driven by solar energy under two hydraulic loadings,and it researchs the strategy of process operation.This research has three conclusions.(1)Firstly, generating capacity of solar panels shows significant differences with the changing of weather conditons sunny,cloudy and rainy. Secondly,generation basicly meets the need of aeration. Generation is not decisive factor that effcets aeration. There are many other factors that affect aeration,such as charging and discharging characteristics of battery,the way of aeration,the volume of aeration and so on. Thirdly,excluding the effects of factors such as dilution of rainwater, hydraulic loading,the concerntration of pollutants in waterbody,the way of aeration,the volume of aeration has positive correlation with DO in aerobic pond.(2) Firstly, when hydraulic loadings is 30031/d.m2,the removing effect of TN is better. Secondly, the removing effect of Ammonia dose not show significant difference under two hydraulic loadings.Thirdly,the removing effect of TP dose not show significant difference under two hydraulic loadings.But when the hydraulic loading increases from 15011/d.m2 to 30031/d.m2, the system suffers impact. It needs a short convalescence to regain effect of removing of TP. fourthly, the removing effect of COD shows significant difference under two hydraulic loadings.When the hydraulic loading is 15011/d.m2,the removing effect of COD is better.When the hydraulic loading is 30031/d.m2,the removing effect of COD is worse.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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