Aerobic Bioaugmentation Efficiency Treatment of Waste Paper Pulp and Papermaking Waste water
Using bamboo charcoal as a carrier,a bioaugmenting materials modified by nitrogen cerium doping and immobilized with microorganisms and trace elements was prepared.The aerobic treatment of waste paper pulping and papermaking wastewater was optimized by bioaugmentation technology,and the difficulty and cost of advanced treatment were reduced by decreasing the effluent concentration of biochemical treatment.The surface morphology,structure and microbial colony of the activated sludge were analyzed by means of SEM and 16S rRNA sequencing,and the effect of bioenhancement technology on the aerobic biological treatment performance of waste paper pulping wastewater was comprehensively evaluated.The results showed that the synergistic technology could improve the biodegradability of pollutants and the biological treatment effect.The average effluent COD was 140 mg/L,the average ammonia nitrogen was 2.3 mg/L,the average color was 260 times,the average COD removal rate was 86.47％,the average ammonia nitrogen removal rate was 88.83％,and the average color removal rate was 33.33％.Under the same conditions,the average effluent COD of synergistic treatment was 72.2 mg/L,the average ammonia nitrogen effluent was 0.95 mg/L,the average effluent chroma was 50 times,the average COD removal rate was 93.02％,the average ammonia nitrogen removal rate reached 95.39％,and the average chroma removal rate was 87.18％.The treatment effect was significantly better than that of ordinary biochemical effluent.The effluent of biological synergistic treatment could meet the discharge standards by traditional PAC and PFS treatments,and the processing cost of PFS was as low as 0.63 yuan/m3.However,the ordinary biochemical treatment could only achieve emission standards using Fenton treatment,and the treatment cost reached 3.27 yuan/m3.The results of SEM analysis showed that the bioaugmented activated sludge flocs had a compact structure and higher biomass.The abundance of Desulfobacterota and Bacteroidota increased by 3.07 and 2.29 percentage points,and the abundance of unclassified_o_PB19 increased by 2.96 percentage points,indicating that the addition of bio-enhanced materials could help some microorganisms with special degradation functions to create a favorable living environment and activate their growth,and improve the directional degradation ability of the reaction system.
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