Pebble Matrix Filtration (PMF) had its orgins in the USSR, where it was envisaged for tertiary sewage treatment. AT university College London it was considered to be suitable for the problem of very high turbidity waters in drinking water treatment. It may have a further application to be used for mine wastes treatment. Essentially, the PMF is a deep bed of pebbles approximately 50mm in size, the lower part of which is infilled with sand. Flow is downward. In the laboratory experiments with kaolin clay suspensions a filter bed depth of 1m of pebbles infilled for 0.75m with sand, operated at 0.72 m/h produced filtrates of below 25 mg/1 when the inlet suspended solid loading was at a maximum of 5000 mg/1. Suitable operational parameters are given at flow rates of 0.72 - 1.56 m/h, for testing kaolin clay concentrations from 500 to 5000 mg/1. For a maximum filtrate concentrations of 25 mg/1 and a head loss limit of 1.5 m, run times of 116 hours were achieved. If the dilution factor of receiving water allows for a higher mine waste effluent quality to be discharged, then longer run times could be achieved. Possible applications in mine wastewater clarification are discussed.
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机译：卵石基质过滤（PMF）起源于苏联，被设想用于三次污水处理。在伦敦大学学院，它被认为适用于饮用水处理中浑浊度很高的问题。它可能还有其他用途，可用于矿山废物处理。本质上，PMF是一个深卵石床，其大小约为50毫米，其下部填充有沙子。流量向下。在高岭土悬浮液的实验室实验中，当入口悬浮固体最大为5000 mg时，以0.72 m / h的速度运行的0.7m m / h的砂砾填充深度为1m的卵石的滤床深度为25 mg / 1以下/ 1。给出合适的操作参数，流速为0.72-1.56 m / h，用于测试500至5000 mg / 1的高岭土浓度。对于最大滤液浓度为25 mg / 1和压头损失限制为1.5 m，运行时间为116小时。如果接收水的稀释系数允许排出更高的矿山废液质量，则可以实现更长的运行时间。讨论了在澄清矿井废水中可能的应用。
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