Solidification/stabilization treatment method for papermaking sludge
A technology for stabilizing and treating papermaking sludge, which is applied in the field of environmental engineering, can solve problems such as potential safety hazards in landfills, increased loads on garbage dams, troublesome landfill operations, etc., to increase strength, reduce leaching rate, and reduce cement The effect of dosage
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[0040] Example 1
[0041] Add 70kg of Portland cement, 25kg of fly ash, and 45kg of coal slag to 1 ton of papermaking sludge, mechanically stir for 10 minutes and mix well, spread it in a landfill, and add a waterproof membrane for curing. Lay the stirred solidified sludge mixture with a thickness of 5cm and place it in a cool place for 2 days. The fast solidified sludge compressive strength reaches 160kPa, the moisture content is 38%, and the mass concentration of heavy metals leached from the solidified block meets the national standard (GB 5085.3- 2007).
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[0042] Example 2
[0043] Add 80kg of Portland cement, 30kg of fly ash, and 50kg of coal slag to 1t of papermaking sludge, mechanically agitate for 12 minutes, and mix it evenly, spread it flat in the landfill, and add a waterproof membrane for curing. Pave the mixed solidified sludge mixture with a thickness of 30cm and put it in a cool place for 5 days. The fast solidified sludge compressive strength reaches 210kPa, the moisture content is 37.5%, and the mass concentration of heavy metals leached from the solidified block meets the national standard (GB 5085.3- 2007).
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[0044] Example 3
[0045] Add 90 kg of Portland cement, 30 kg of fly ash, and 80 kg of coal slag to 1 ton of papermaking sludge, mechanically stir for 15 minutes, and mix it evenly, spread it in a landfill, and add a waterproof membrane for curing. Pave the stirred solidified sludge mixture to a thickness of 50cm and place it in a cool place for 8 days. The fast solidified compressive strength of the sludge reaches 240kPa, the moisture content is 35.4%, and the mass concentration of heavy metals leached from the solidified block meets the national standard (GB 5085.3- 2007).
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