Study On High Efficient Bacterias Of Strengthen Dyeing Wastewater Treatment Development And Experimental

The rapid development of printing and dyeing industry become an important part of our economy in recent years.According to Statistics of Zhejiang Environmental Protection bureau in 2015,the CODcr emissions of printing and dyeing wastewater have occupied the first place in CODcr emissions of Zhejiang industrial wastewater.The printing and dyeing sewage is of great quantity,high colority and poor biochemical purification ability,it is one of wastewater that difficult to treat.The Ministry of Environment Protection of the PRC and General Administration of Quality Supervision,Inspection and Quarantine of the PRC jointly issued the（GB4287-2012）"Discharge standards of water pollutants for dyeing and finishing of textile industry" Put forward a higher requirements and standards to he quality of printing and dyeing wastewater treatment,the original Common process has been unable to meet the treatment requirements of water quality.Refractory wastewater treatment for such efficient degrading bacterium development and exploration of its application is very important.Research and its application of efficient degradation of bacteria agent is particularly important to such refractory wastewater treatment.The thesis has been carried out an study on high efficient bacterias screening for enhanced printing and dyeing wastewater treatment 、efficient bacterias and the actual processing in printing and dyeing wastewater,degradation efficiency of high efficient bacterias for dyeing wastewater and its practical treatment effect in dyeing wastewater,target on provide new thoughts and methods on standards discharge of dyeing wastewater.The results are as follows:（1）Analysis of contaminant components in wastewater from different printing and dyeing wastewater treatment process reactors in a printing and dyeing enterprises by GC / MS（Gas Chromatography / Mass Spectrometry）.According to the study of migration,transformation anddegradation of water pollutants,marked diethyl phthalate（DEP）,palmitamide and oleamide as the characteristic pollutants in printing and dyeing wastewater.（2）Three kinds of bacteria were screened which can be used in strengthen treatment of printing and dyeing wastewater by using characteristic pollutants,which from sludge contaminated by oil polluted,sludge from the sewage treatment plant of a printing and dyeing factory.The bacteria were identified as Burkholderia,Rhodococcus ruber and Gordonia amicalis.（3）Using the characteristic pollutants as the object of the study,changed the effects of treatment conditions,such as temperature,time,dissolved oxygen and inoculation amount on the degradation experiment,analyzed the influence of changing the experimental conditions on the degradation of the characteristic pollutants,and determine the best treatment conditions.（4）The best treatment condition of DEP was as follows: 35℃,in the environment of dissolved oxygen with table speed of 180 rpm.The volume of inoculum was 2 mL of Burkholderia with OD₆₀₀ of 1.0 to the culture medium containing DEP for 48 h.The degradation rate was38.8%.The best treatment condition of palmitamide and oleamide was as follows: 35℃,in the environment of dissolved oxygen with table speed of 180 rpm,the volume of inoculum was 2 mL of Rhodococcus ruber with OD600 of 1.0 to the culture medium containing palmitamide and oleamide for 48 h.The degradation rate was 37.8% and 36.3%respectively.（5）A small-scale bioaugmentation experiment was carried out on the first-stage flotation effluent of a printing and dyeing enterprise in Zhejiang Province.Using anaerobic-a contact oxidation-two contact oxidation process,investigate effect of treatment of CODcr and NH3-N using high efficient bacterias,high efficient bacterias with Biological promoting.The results showed that the average removal efficiency of CODcr was increased from 65.7% to 81.7% after the addition of high efficient bacterias.And within two months stability achieved（GB4287-2012）"Discharge standards of water pollutants for dyeing and finishing of textile industry" with standards of CODcr≤200 mg/L,NH3-N≤10 mg/L.