Open AccessSolid-liquid separation techniques for efficient recovery of P2O5 from phosphoric sludge
Author(s) -
Rim Jouraiphy,
Islaam Anouar,
Hamid Mazouz,
Kortobi El Badr,
Rachid Boulif,
Ahmed Mahrou,
A. Ibnlfassi
Publication year - 2020
Publication title -
chemical industry and chemical engineering quarterly
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.189
H-Index - 26
eISSN - 2217-7434
pISSN - 1451-9372
DOI - 10.2298/ciceq191225016j
Subject(s) - phosphoric acid , filtration (mathematics) , chromatography , pulp and paper industry , separation (statistics) , phosphate , centrifugation , separation process , waste management , process engineering , materials science , chemistry , engineering , computer science , mathematics , metallurgy , organic chemistry , statistics , machine learning
Phosphoric acid sludge is one of the prominent problems in the phosphate industry. Its production co-occurs with large losses of P2O5 that affect the process performance. Management and valorization of this waste is a key issue. For the industrial application in solid-liquid separation, selecting the suitable technique for an efficient separation is a fundamental factor. Most of the separation processes fail because of insufficient development effort in the laboratory phase and misunderstanding of separation objectives. The aim of this work is to deal with the P2O5 losses by studying their recovery from phosphoric sludge using a physical solid-liquid separation technique. Hence, laboratory tests have been conducted using vacuum filtration, centrifugation, and press filtration. The comparison was based on three requirements: the liquid recovery rate for each method, the amount of P2O5 recovered, and the solid content remaining in the recovered acid. Results showed that press filtration gave the higher performance of P2O5 recovery, up to 88.90%, followed by vacuum filtration with 69.81% and then centrifugation with 80.91%.