Immobilized White-rot Fungi Treatment Of Coking Wastewater Process Research

The immobilization of white rot fungi and other technology are used together to coking wastewater treatment.The optimum conditions for coking wastewater pretreatment are as follows:the ratio of iron-copper was 4:1,HRT=40min,pH=7.0,the solid dosage was 0.8 g / L.The removal of the wastewater is more than 28%.The wastewater color and turbidity have been greatly improved.The immobilization of white rot fungus has a good effect for coking wastewater treatment.For removal of the contamination in coking wastewater by the immobilized white rot fungi,the optimum pH value and temperature were 6.0 and 30℃,the best reflux ratio can use 0.5.While the optimum dosage of immobilized white rots fungi was 12.0g/L, respectively.The removal rate of COD and phenolic compound were 58.46%and 96.76%in 3 days.After coking wastewater pretreatment by iron-copper microelectrolysis,the HRT was 40 min.draining the water to the immobilization of white-rot fungi reactor after removing Fe²⁺from water.The HRT =24 h.Then drain the wastewater to the SBR for further biochemical treatment,the operation period was 36 h,the operational procedures for instantaneous influxion - aerating for 24 h - stop aeration and anaerobic stirring for 7 h-short-term aerating for 3 min-precipitation,drainage - idle.At last,use fly ash to adsorption the wastewater for advanced treatment.After a period of continuous treatment, the effluent COD was the 165 mg / L,ammonia was 11.68 mg / L,the removal COD ammonia and phenols were 95.55%,90.08%,98.32%,and the processing effect is stably. The water quality achieved the second emission standards of the State "wastewater discharge standards"(GB8978-1996).