System and method for deep arsenic removal through coagulation

• Main Authors: TANG KUANGREN, ZHANG JUN, ZHU LISHEN, HE HUALI, ZHAO WEI, TANG SHUNCHANG, CHEN YANMIAO
• Format: Patent
• Language: Chinese; English
• Published: 06.12.2019
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a system and a method for deep arsenic removal through coagulation. According to the method, wastewater is lifted to a distribution pool from an underground water bin through awater pump; the wastewater is homogenized in the distribution pool, and then enters a first-stage reaction pool, and 60 mg/L of polyferric sulfate is added into the first-stage reaction pool througha PFS adding system; the obtained wastewater flows through a second-stage reaction pool, and is subjected to a coagulation reaction for 5 min; the treated wastewater flows through a third-stage reaction pool and a fourth-stage reaction pool, a 0.2 mg/L flocculating agent is added into the fourth-stage reaction pool through a PAM adding system, and a flocculation reaction is performed for 5 min; the obtained wastewater enters a precipitation pool, and is subjected to solid-liquid separation; the separated supernatant flows to a Parshall flume through a water discharge port, and then is discharged out; the underflow slud