A series of belt filter press trials were performed to assess BFP technology as a method fordewatering digested biosolids which had been pretreated by the Cambi Thermal HydrolysisProcess (THP). The THP is a sludge pretreatment process which heats raw sludges to hightemperature (150-165 ℃ ) using steam followed by mesophilic digestion. In this study, twodifferent full scale THP sludges were dewatered on two belt filter presses supplied by twodifferent manufacturers. The digested THP sludges had solids concentrations between about 5-7%. The goal of the project was to evaluate the effect of solids loading rates and polymer dosingon cake solids and capture. The results showed the THP sludges dewatered well using BFPs,with cakes solids of 30% or higher easily achieved along with capture rates greater than 99%.This performance was achieved over a broad solids loading rate with 30% cake solids beingachieved at loading rates of up to 1000 kg/m-hr. The study also showed that mixing of thepolymer and sludge was a critical parameter for achieving good flocculation and dewatering.
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机译：进行了一系列带式压滤机试验，以评估BFP技术作为一种脱水消化生物固体的方法，该方法已通过Cambi热水解工艺（THP）进行了预处理。 THP是一种污泥预处理工艺，使用蒸汽随后进行中温消化将生污泥加热至高温（150-165℃）。在这项研究中，两种不同的全尺寸THP污泥在两家不同制造商提供的两台带式压滤机上脱水。消化后的THP污泥的固体浓度约为5-7％。该项目的目标是评估固体装载率和聚合物配料对饼状固体和捕集的影响。结果表明，使用BFP很好地脱水了THP污泥，滤饼固含量很容易达到30％或更高，捕集率大于99％。在较宽的固含量下，该性能得以实现，滤饼固含量为30％时达到了30％最高1000 kg / m-hr。研究还表明，聚合物和污泥的混合是实现良好絮凝和脱水的关键参数。
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