On the reuse of coking wastewater
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The wastewater from our factory undergoes solvent dephenolization, ammonia evaporation, and biochemical treatment, followed by sand filtration, ultrafiltration, and reverse osmosis for reuse. After running one phase, the following issues were observed: 1. The recovery rate is relatively low, failing to reach 70% ； 2. The operating time of the reverse osmosis membrane is short. I wonder how other factories are performing? Let’s exchange experiences from various factories.
What is the organic matter concentration in coking wastewater after biochemical treatment? Is it the clogging caused by organic substances that leads to frequent blockages in RO systems? What about ultrafiltration? I believe that the concentration of organic substances is the main cause of membrane clogging