Application of denitrification EGSB in ethylene glycol wastewater treatment
At present,most projects of total nitrogen wastewater mainly containing nitrate ni-trogen are still treated by AO process,with large reflux ratio and high investment and operation cost.EGSB is used to treat high nitrate nitrogen wastewater,with a volume load of 1.0 kg/(m3·d),a circulation reflux ratio of 300％,and an upflow velocity of 4 m/h,the nitrate nitrogen can be reduced from 712 mg/L to 150 mg/L.Compared with AO process under the same water quality conditions,it can save about 7～9 times of land,more than 3 times of investment cost,and more savings in operation pharmaceuticals and power consumption.It has good investment cost advanta-ges and production and operation advantages.
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