Affiliation:
1. Construction Branch of State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China
2. School of Civil Engineering, Wuhan University, Wuhan 430072, China
Abstract
The flocculation–solidification–filter-press combined method is a new type of method for treating waste slurry that combines flocculation and chemical curing with a mechanical filter press. Among these processes, the mechanical filter-press process is key to the efficient disposal of waste engineering slurries by the flocculation–solidification–filter-press combined method. In the mechanical filter-press process, parameters including the initial thickness of filtration mud, the magnitude of filtration pressure, and the duration of press filtration have important impacts on the dewatering and strength after subsequent curing. In this work, a series of laboratory tests were conducted to study the influence of filter-press parameters on flocculated–solidified mud by measuring the properties of treated and cured mud. The test results showed that the initial mud bag thickness is an important factor in the mud treatment effect. As the initial mud bag thickness increases, the greater the water content of the mud at the end of the filter-press process after applying the same amount of time and the same amount of pressure, the lower the post-conservation strength will be. The increase in filtration pressure and filtration time within a certain range can reduce the water content of the mud brick after filtration and significantly improve its shear strength. In the actual process of filtering in the project, the thickness of the initial mud bag should be no more than 140 mm, the filtration pressure is about 0.35 MPa, and the filtration time is suitable for 2 min.
Funder
Science and Technology Project of State Grid Jiangsu Electric Power Co, Ltd.
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference21 articles.
1. Preparation of chitosan-based flocculant for high density waste drilling mud solid–liquid separation;Zhu;J. Appl. Polym. Sci.,2012
2. Pollution of construction waste slurry and prevention measures;Fang;Chin. J. Geotech. Eng.,2011
3. Experimental study on solid-liquid separation of construction waste slurry by additive agent-combined vacuum preloading;Wu;Chin. J. Geotech. Eng.,2016
4. Chang, I., Im, J., and Cho, G.C. (2016). Introduction of microbial biopolymers in soil treatment for future environmentally-friendly and sustainable geotechnical engineering. Sustainability, 8.
5. Soldo, A., and Miletić, M. (2019). Study on shear strength of xanthan gum-amended soil. Sustainability, 11.