METHOD FOR TREATING WASTE WATER OF EXHAUST GAS TREATMENT EQUIPMENT FOR OPTICAL FIBER PREFORM PRODUCING APPARATUS

摘要

PURPOSE: To reduce the amount of industrial waste generated at the time of treatment in the title treatment method. ;CONSTITUTION: Waste water 1 containing silica (SiO₂) discharged from exhaust gas treatment equipment is guided to a pH adjusting process 2 and a pH control agent 3 such as NaOH, HCl or H₂SO₄ is added to the waste water 1 to adjust the pH of the waste water 1 to 6-8 (neutral). Next, the waste water adjusted in pH is directly guided to a dehydration process 9 and dehydrated to be separated into a solid 10 and separated water 11.;COPYRIGHT: (C)1993,JPO&Japio