Advanced Treatment of Stabilized Leachate by Sodium Hypochlorite Composite Chemicals

Abstract:

In this work, advanced treatment of leachate after biological treatment was performed using sodium hypochlorite solution (NaClO) + ferric chloride (FeCl₃) + polyacrylamide (PAM) and NaClO + aluminum poly-chloride (PAC) + PAM, respectively, to determine the optimal condition for removal of COD and color. It was found that the optimal condition was: PAM 5 mg/L, FeCl₃ 420 mg/L, NaClO 6 mL/L, reaction time 15 min for treatment using FeCl₃ + NaClO + PAM, and PAM 5 mg/L, PAC 800 mg/L, NaClO 6 mL/L, reaction time 15 min for PAC + NaClO + PAM. After being treated at the optimal conditions, the effluent quality met requirements of the tertiary grade described in “Integrated wastewater discharge standard”.

• Periodical: Key Engineering Materials (Volumes 474-476)
• Pages: 1272-1276
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.474-476.1272
• Online since: April 2011
• Authors: Hai Ying Zhang, Hong Tao Hu, Yi Zheng, Dong Hui Chen
• Keywords: Advanced Treatment, Coagulation, Refractory Leachate, Sodium Hypochlorite

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