Environmental Science and Pollution Research

, Volume 26, Issue 30, pp 30625–30632 | Cite as

Innovative sludge pretreatment technology for impurity separation using micromesh

  • Xiaojie Mei
  • Xiaomeng HanEmail author
  • Lili Zang
  • Zhichao Wu
Water Environment Protection and Contamination Treatment


In order to reduce the impacts on sludge treatment facilities caused by impurities such as fibers, hairs, plastic debris, and coarse sand, an innovative primary sludge pretreatment technology, sludge impurity separator (SIS), was proposed in this study. Non-woven micromesh with pore size of 0.40 mm was used to remove the impurities from primary sludge. Results of lab-scale tests showed that impurity concentration, aeration intensity, and channel gap were the key operation parameters, of which the optimized values were below 25 g/L, 0.8 m3/(m2 min), and 2.5 cm, respectively. In the full-scale SIS with treatment capacity of 300 m3/day, over 88% of impurities could be removed from influent and the cleaning cycle of micromesh was more than 16 days. Economic analysis revealed that the average energy consumption was 1.06 kWh/m3 treated sludge and operation cost was 0.6 yuan/m3 treated sludge.


Primary sludge Impurity separation Micromesh Sludge impurity separator Micromesh fouling Sludge pretreatment 


Funding information

This work received support from the State Key Laboratory of Pollution Control and Resource Reuse Foundation (PCRRF16031) and Major Science and Technology Program for Water Pollution Control and Treatment (2017ZX07201005).

Supplementary material

11356_2018_2324_MOESM1_ESM.docx (33 kb)
ESM 1 (DOCX 32 kb)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Environmental Science and EngineeringTongji UniversityShanghaiChina
  2. 2.Shanghai Urban Construction Design & Research InstituteShanghaiChina
  3. 3.Shanghai Urban Water Resources Development and Utilization National Engineering Center Co. Ltd.ShanghaiChina
  4. 4.Shanghai Zizheng Environmental Technology Co. Ltd.ShanghaiChina

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