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Sdudy on the Urban Domestic Refuse Treatment by Leachate Recirculation Process

Author: WangChuanYing
Tutor: LiuShan
School: Chang'an University
Course: Environmental Engineering
Keywords: Leachate Recharge Aerobic facultative Total phosphorus Solubility orthophosphate C / N / P
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 65
Quote: 0
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Abstract


Currently, there are close to 90 percent of the city handling municipal solid waste sanitary landfill method. Seeking a set that is economically reasonable, and they apply to municipal solid waste leachate treatment process is an urgent need to promote the landfill technology development. Combined with China's actual situation, recharge processing method as an effective municipal solid waste leachate treatment technology has great prospects for development. This thesis garbage leachate recirculation CODcr and NH3-N, nitrate, nitrite, phosphorus element content Leachate treatment technology to provide the basis of parameters. Draw the following conclusions: (1) leachate recharge for leachate in CODcr and NH3-N have certain removal of four landfill column experiments. Role in the the landfill layer and covering the recharge chrominance better treatment effect; (2) of NH3-N concentration of leachate over time the growth of the first experienced a fluctuation in the growth process, and then experienced a rapid growth in the process, and then tends to a gentle downward trend. With the growth of the time, the removal of ammonia nitrogen is not obvious, but overall 2,3,4 dope recharge in landfill leachate ammonia nitrogen content of less than No. 1 Recharge content: (3) 4 landfill column nitrate nitrogen as the time increases overall showed a slow downward trend. The landfill column nitrite nitrogen is always kept at a very low level, below 4 mg / L, nitrite nitrogen accumulated phenomenon; (4) Compared with the 1st landfill column, the total of the leachate phosphorus and soluble reactive phosphate concentration growth over time from going through a process of rapid growth, and then experienced a slow decline. Dope anaerobic recharge conducive to the TP and solubility are the removal of phosphate; (5) C / N ratio of the early experiments showed a rapid growth, with increasing landfill time, the C / N value of a slow a downward trend, the overall four landfill column C / N ratio difference is not great. C / P ratio in the early stages of the experiment show rapid growth trend, With increase of landfill Time, C / P value of upward trend; (6) temperature is the most important factor affecting the recharge effect. Observed the three recharge the landfill column temperature increases, the amount of leachate generated significantly increased the CODcr content decreased, elevated temperatures can increase the microbial activity, and at the same time increase the generation of water, thus reduce CODcr content; (7) ammonia nitrification - denitrification, anaerobic ammonification way to get effectively remove phosphorus elements mainly phosphate accumulating bacteria in anaerobic phosphorus release and aerobic phosphorus uptake removed.

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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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