| Textile printing and dyeing industry is an important pillar of livelihood industries,but it is also consuming too much energy and water, the COD emission of 39industries in our country ranks second, still the volume of wastewater discharge isthirdly. Textile printing and dyeing wastewater with high organic pollutant content,color depth, alkaline, changefully water quality, always been a tricky one of industrialwastewater. With the improvement of national wastewater discharge standards, theresearch of new and high technology in dyeing wastewater treatment becomes keyissues to sustainable development of industry.As a maturity method to treat slightly polluted water,biological active carbon has agood application prospect in the treatment of the water that can’t up to emissionstandards,which is produced by traditional printing and dyeing wastewater biologicaltreating process.This paper aims to study how to improve the present biologicalactivated carbon technology,to applicate the technology in deep treatment of printingand dyeing wastewater.(1)Through screening ,obtained a fungi strain and two bacteria strains that candegrade reactive brilliant red X-3B.The fungi strain’s dye degradation rate is upto100% on solid culture.The bacteria strain’s dye degradation rate is up to100% inliquid culture too,when it’s chroma removal rate is above 90%.(2)Built a high efficience biological activated carbon device with the screenedbacteria,and treated 7 simulated dye wastewater.The dyes ’ structure are similar toreactive brilliant red X-3B.The COD removal rate is above 90% and the chromaremoval rate is above 70%(most above 90%) in 3 hours.The decreases of UV254arequite different, may be relative to the dye’s structure.(3)Analyzed the microorganisms in the stable operation biological activated carbonby PCR-DGGE.Realized that most of the internal microorganisms were aerobic,whenthe added bacteria was dominant.The results show that , with the effective engineering bacteria biological activatedcarbon can treat simulated printing and dyeing wastewater very well,which imply agood application prospect in the printing and dyeing wastewater treatment.It is worthto do further research on the theme. |
