Open AccessTheoretical and Experimental Verification of Rheological Characteristics of High Viscosity Municipal Sludge
Author(s) -
Feifei Xing,
Ruican Hao,
Jun Ji,
Lu Lu,
Baochuan Tian
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/772/1/012100
Subject(s) - thixotropy , rheology , viscosity , sewage sludge , effluent , rheometer , sewage treatment , environmental science , pulp and paper industry , materials science , waste management , environmental engineering , engineering , composite material
After upgrading the wastewater treatment standard, the effluent quality reached the first class A standard by strengthening the process optimization of biological dephosphorization and denitrification. Taking the sludge treatment project of Shanghai Bamboo Garden as an example, the sludge composition from the fourth plant is compared with the weighted value of the sludge before the upgrading of the standard, and the sludge element content is obviously increased and the sludge viscosity is increased. By kinexus lab+ series of rotary rheometer to test the viscosity of the sample sludge, it is concluded that the viscosity zone of the sample sludge is between 45% and 55% solid content. The rheological test of sludge characterization-viscosity-thixotropy and stacking test standard shows that the viscous zone of sludge is about 40% or more. Herschel-Bulkley model is basically suitable to describe the rheology of sludge in this sample when the solid content is more than 44%. To avoid the sludge viscous zone is the key to design the sludge transport system and the subsequent drying incineration system process parameters in the sludge treatment project of Shanghai Bamboo Garden.