Abstract: Organic pollutants in rosin processing wastewater have the characteristics complex of composition, high concentration, high molecular weight, being hard to be degraded, great changes on the concentration. Discharge of wastewater hiyhly fluctuates. It is hard to keep the wastewater discharge up to the standard stably using the traditional physical-chemical treatment and bio-chemical treatments. The treatment method in this paper is to make improvement on the traditional physical-chemical-biochemical treatment method, and efficiently solve the difficulties of rosin processing wastewater treatment. Firstly, the inspissation treatment is used to deal with the high concentration organic wastewater yielded from the rosin deep-processing production. Secondly, physical-chemical-biochemical synthetic treatment method was used to deal with the mixed wastewater with low COD concentration. Then the wastewater discharge can reach primary discharge standard specified in GB 8978-1996, and can be recycled for landscaping, water cooling system, and water ring vacuum pump, etc.

Key words: concentration treatment, physical-chemical treatment, bio-chemical treatment, discharge up to standard, recycle use