TW EASTERN CHEM SINGAPORE PTE.LTD
Polyacrylamide for Electroplating Wastewater Treatment
The sources of electroplating wastewater are:
(1) cleaning water for plating parts; (2) waste electroplating bath; (3) other
wastewater, including washing floor of workshop, washing plate, condensation
water for ventilation equipment, and various bath liquids and drainage caused
by leakage or improper operation and management of plating bath.
The characteristics of electroplating wastewater are:
(1) Strong acidic. Since the
removal of oxides on metal surface is usually done by acid pickling, the acid
cannot be fully utilized. Some of the residues are left in the wastewater pool
and washed into the wastewater pool.
(2) It contains a lot of heavy metals, such as
Cr6+, Cu2+, Ni2+, Zn2+, Fe2+.
(3) Containing highly toxic substances. For
example, chromium and cyanide.
Wastewater
treatment:
1.
Air flotation
2.
Ion exchange
3.
Electrolysis
4.
Extraction.
After
the treatment of electroplating wastewater by the above methods, most of the heavy metals and harmful materials in the
wastewater are removed, and further treatment is still needed to meet the
discharge standards. Anionic polyacrylamide and non-ionic polyacrylamide can be
used for the further treatment of electroplating wastewater, which have
incomparable advantages than
any other flocculants.