Study on treatment of ultra-high concentration phosphorus-containing wastewater

摘要

An efficient combined treatment process, lime-electrolysis was developed to treat the Ultra-high concentration phosphorus-containing Wastewater. The experimental results show that the removal rates of COD and TP are 86.4%, 69.9%, respectively. The results indicated that the optimal conditions are: lime dosage was 2 g, pH 8.5, mixing rate 2.5 (equivalent units)and reaction time 20 min, sedimentation time 10 min; using the soluble iron plate and carbon rod as electrode plate, electrolysis pH 7, electric current 0.4 A, reaction time 80 min, exchange electrode reaction 2 min per 12 min. The biodegradability of the wastewater was improved evidently. This combined process provides instructive example for efficient treatment of Ultra-high concentration phosphorus-containing Wastewater.