Plate-and-frame pressured filtration of sediment sludge from solid liquid separator in mode of pond captive farming

ZHENG Qi; TAN Hequn; HE Xugang; ZHANG Yiren; XIA Chengxing

doi:10.13300/j.cnki.hnlkxb.2025.04.025

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Plate-and-frame pressured filtration of sediment sludge from solid liquid separator in mode of pond captive farming

Food science and agricultural engineering | 更新时间：2026-11-05

- Plate-and-frame pressured filtration of sediment sludge from solid liquid separator in mode of pond captive farming
- Journal of Huazhong Agricultural University Vol. 44, Issue 4, Pages: 259-268(2025)
- 作者机构：
  
  1.华中农业大学工学院，武汉 430070
  2.农业农村部水产养殖设施工程重点实验室，武汉 430070
  3.华中农业大学水产学院，武汉 430070
- 作者简介：
- 基金信息：
- DOI：10.13300/j.cnki.hnlkxb.2025.04.025
  CLC： X714
- Received：30 March 2024，
  
  Published：05 July 2025
- 稿件说明：
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郑祺，谭鹤群，何绪刚，等.池塘圈养模式尾水分离塔沉降污泥板框压滤试验研究［J］.华中农业大学学报，2025，44（4）：259‐268.

ZHENG Qi,TAN Hequn,HE Xugang,et al.Plate-and-frame pressured filtration of sediment sludge from solid liquid separator in mode of pond captive farming[J].Journal of Huazhong Agricultural University,2025,44(04):259-268.
郑祺，谭鹤群，何绪刚，等.池塘圈养模式尾水分离塔沉降污泥板框压滤试验研究［J］.华中农业大学学报，2025，44（4）：259‐268. DOI： 10.13300/j.cnki.hnlkxb.2025.04.025.

ZHENG Qi,TAN Hequn,HE Xugang,et al.Plate-and-frame pressured filtration of sediment sludge from solid liquid separator in mode of pond captive farming[J].Journal of Huazhong Agricultural University,2025,44(04):259-268. DOI： 10.13300/j.cnki.hnlkxb.2025.04.025.

摘要

为解决池塘圈养系统尾水分离塔中沉降污泥含水率高难以处理的问题，采用“絮凝+板框压滤”的方式开展污泥脱水试验研究。选取聚合硫酸铝（PAS）、聚硅酸铝铁（

PSAF）和聚合硫酸铁（PFS） 3种无机絮凝剂，以絮凝剂种类及添加量为试验因素，以污泥比阻以及污泥滤液污染属性为试验指标，开展污泥絮凝试验；以滤布种类、优选出的絮凝剂添加量、过滤压力及保压时间为试验因素，以污泥脱水率及滤液污染属性为试验指标，开展沉降污泥的板框压滤脱水试验。结果显示：PAS、PSAF、PFS对污泥均有显著的调理效果，其中，当PSAF添加量为污泥干物质质量的2%时效果最佳，此时污泥比阻可降低97.43%，为2.08×10

m/kg，滤液的内梅罗指数为3.61；板框压滤对PSAF调理后的污泥具有良好的脱水效果，采用涤纶621材质的滤布、PSAF添加量为污泥干物质质量的2%、过滤压力为0.3 MPa、保压时间为10 min时，污泥板框压滤脱水试验能实现较好的脱水效果，污泥含水率降至70.98%，脱水率可达80.94%，滤液内梅罗指数为4.54。研究表明，PSAF调理后板框压滤的工艺，可作为池塘圈养系统沉降污泥的脱水工艺，以实现污泥减量、便于运输储存的目的。

Abstract

The method of “coagulation+plate and frame filtration” was used to conduct dehydration experiments to solve the problem of difficulty in handling high moisture in the sediment sludge from the solid liquid separator in the mode of pond captive farming. Experiments on coagulation of sludge were conducted with types and dosage of three inorganic coagulants including polyaluminum sulfate（PAS）， poly silicate aluminum ferric（PSAF）， and poly ferric sulfate（PFS） as experimental factors， and the specific resistance of sludge and pollution properties of sludge filtrate as experimental indexes. Experiments on the dehydration of sediment sludge with plate and frame pressured filtration were conducted with the type of filter cloth， the optimal dosage of the selected coagulant， the pressure of filtration and the time of holding pressure as experimental factors， and the dehydration rate of sludge and pollution properties of filtrate as experimental indexes. The results showed that PAS， PSAF， and PFS all had significant effects on conditioning sludge. When the dosage of PSAF was 2% of the dry matter mass of sludge， the effect was optimal. At this time， the specific resistance of sludge was reduced by 97.43%， to 2.08×10

m/kg， with the Nemerow index of the filtrate of 3.61. Plate and frame pressured filtration had good performance of dehydration on the sludge conditioned with PSAF. The dehydration effect of sediment sludge with plate and frame pressured filtration was good， with the moisture in sludg

e reduced to 70.98%， the dehydration rate reaching 80.94%， and the Nemerow index in the filtrate being 4.54 when the filter cloth was made of polyester 621， the dosage of PSAF was 2% of the dry matter mass of sludge， the pressure of filtration was 0.3 MPa， and the time of holding pressure was 10 minutes. It is indicated that the approach of plate and frame pressured filtration after PSAF conditioning can be used as an effective dehydration technique for sediment sludge in the mode of pond captive farming to achieve the goal of reducing the volume of sludge to be convenient for transportation and storage.

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references

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