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首页> 外文会议>Canadian Society for Civil Engineering annual conference >STRUVITE FORMATION IN LEACHATE RECIRCULATION PIPES OF BIOREACTOR LANDFILLS
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STRUVITE FORMATION IN LEACHATE RECIRCULATION PIPES OF BIOREACTOR LANDFILLS

机译：生物反应器填埋场渗滤液循环管中的鸟粪石形成

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A primary operational issue associated with bioreactor landfills is the potential clogging ofleachate recirculation pipes due to the formation of deposits. Studies on calcium carbonate formationhave been performed in the past. Struvite (MgNH4PO4.6H2O) is another chemical precipitate reported asa widespread problem in the wastewater industry. This study presents results from laboratoryexperiments conducted to investigate the possibility of Struvite scale formation in leachate recirculationpipes. Two types of pipes, HDPE (High-Density Polyethylene) and PVC (Polyvinyl Chloride), were testedunder three different flow rates using simulated leachate. Significant reduction in concentrations ofmagnesium, total phosphorous, and ammonium-nitrogen were observed when simulated leachate waspassed through the test pipes. The crystal structure and composition of the deposits after eachexperimental run were monitored and found to closely match that of Struvite. The highest scale depositionwas observed for the low flow rate, irrespective of the pipe material
机译：与生物反应器垃圾填埋场相关的主要操作问题是潜在的堵塞 由于沉淀物的形成，导致渗滤液再循环管道。碳酸钙形成的研究 过去已经表演过。鸟粪石（MgNH4PO4.6H2O）是另一种化学沉淀，据报道为 废水行业普遍存在的问题。这项研究提出了实验室的结果 进行实验以研究鸟粪石在水滤液再循环中形成水垢的可能性 管道。测试了两种类型的管道，HDPE（高密度聚乙烯）和PVC（聚氯乙烯） 在三种不同流速下使用模拟渗滤液。浓度显着降低 当模拟浸出液为时，观察到镁，总磷和铵态氮。 通过测试管道。每次沉积后的晶体结构和沉积物组成 监测实验运行，发现其与Struvite的运行非常匹配。最高规模的沉积 观察到低流速，与管道材料无关

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