Published: Jan. 1, 2024

This study was based on an industrial sludge landfill with a scale of 1 million cubic meters, which had been filled for more than 10 years. It focused the secondary dewatering (LS) organic carbon content (TOC) greater 50% and VSS/SS ratio 0.59. A Response Surface Methodology (RSM) model established using coagulant ferrous sulfate (FeSO4) conditioning agents such as hydrated MgO, blast furnace slag (BFS), CaO. By solving RSM equations respective indicators, optimal dosages FeSO4, BFS were determined to be 90 mg/g DS, CaO 174.875 DS. Further examinations performance, apparent properties, EPS components, rheological characteristics, moisture distribution, pollutant variation led development green waste-based agent composed FeSO4 BFS. In small-scale plate frame tests, 69.11%, in final production-scale experiments, it 65.72%, actual application cost being only $13 per ton dry solids. Additionally, when used together, combined action Fe Si could reduce biotoxicity heavy metals, cut down 75.2% sludge's TOC, effectively leaching substances from leachate, beneficial subsequent disposal. conclusion, use economically efficient, effective dewatering, significant harm reduction effects, making viable waste treatment solution

Language: Английский