Sdudy On The Urban Domestic Refuse Treatment By Leachate Recirculation Process

At present,almost 90% of the municipal refuse in our country was treated with landfill technology. So seeking a economical leachate treatment process adapted to China is an impendent problem to promote the development of landfill technology.Considering the reality of our country, recirculation as an effective treatment technology of leachate has a great prospect for development.This thesis research of garbage leachate recharging CODcr and NH3-N. nitrate and nitrite, phosphor elements such content for the effects of changes, leachate recharging processing technology applied to provide basic parameters. Through the four experimental study of landfill column that the main conclusions:(1) Observing four experiments device, can see leachate recharging the CODcr for leachate and leachate NH3 - N all have certain remove effect. Meanwhile in landfills layer and layer under the role of chroma, recharge processing has good treatment effect;(2) Leachate NH3 - N concentration of growth over time experienced a wave of first and then experiencing a growth process fast growth process, then tends to be gentle decline. As time growth, ammonia nitrogen removal effect is not obvious, but overall 2.3,4. the municipal landfill leachate recirculation bioburden of ammonia nitrogen content was lower than 1 not recharge;(3) On the whole the experimental process in general, four device of nitrate nitrogen as time increases are slow decline. Each device of nitrite nitrogen remains in a very low level, below 4mg/L, did not find nitrite nitrogen have accumulated phenomenon;(4) In the natural state, leachate phosphorus concentration over time before the growth experienced a rapid growth process, followed a slow drop process. Thus, bioburden anaerobic recharge conducive to the total phosphorus and solubility ZhengLinSuan removal, also be helpful for junk stabilization process;(5) C/N ratio of early in the experiment present trend of fast increase, then, with the increase of landfill time, C/N values have slowly downward trend, four devices C/N ratios are not that great. General C/P ratio of early in the experiment present trend of fast increase, then, with the landfill time increased the value of C/N the rising trend, reason is 2,3 landfill leachate treatment of total phosphorus and solubility are phosphate removing best effect;(6) The temperature is the most factors affect injection effect. Observe the three recharging landfill column, temperature, the quantity of leachate CODcr have increased significantly, reduce, explain to microbial reaction temperature, thus achieved the waste removal. (7) Ammonia nitrogen mainly through the nitration-denitrifying, anaerobic ammoniation etc. Get effectively remove phosphorus element, is primarily through phosphorus enrichment of anaerobic bacteria release phosphorus reconciliation process to get oxygen p uptake of effectively remove.