Orbal Oxidation Ditch Process Of Upgrading And Reconstruction And The Use Of Recycled Water

The sewage which the engineering handle is mainly composed of the urban industrial wastewater and public buildings water and urban domestic water.The main pollutants in sewage waste water COD、BOD、SS、NH3-N、TN、TP and heavy metals and toxic substances.The following effluent quality is CODcr=280mg/L, BOD=120mg/L, SS=160mg/L, NH3-N=38.4mg/L, TN=48.6mg/L, TP=2.68mg/L.The original design pof sewage treatment discharge standards for Bstandard,has been urable to meet the requirements of the countries and regions provisions,and waterworks the drainage discharged Zhuozhang will affect the water quality of the Haihe River Basin,it shoulg be mentioned standard transformation,resorted to water emissions by an A standard.Since the sewage treatment center operators,a daily average of5000tons quasi water efflux,resulting in a great waste of resources,so the water reuse should be put on the agenda.Therefore,Yushe County sewage treatment plant upgrades mentioned stangard and water reuse project construction is necessary.Sewage treatment centers deal with water to5000t/d or so,so far from the2007run growth of water,the water did not change signifiantly.Taking into account the engineering of a handing capacity of7500t/d of the upgrade mentioned standarddtreatmeng and water reuse project scale as Q=7500m3/d,312.5m3/h.The address water of treatment plant is CODcr≤40mg/L, BOD≤10mg/L, SS≤10mg/L, NH3-N≤8mg/L, TN≤15mg/L, TP≤0.5mg/L,effluent quality meets the national level A emissions standard.After the sewage treatment, the water is back to Yushe chemical plants for sewage station near water,the excess amount of water discharged into a nearby river basin.Concentration tank after treatment filter press and shipped to the sidelines as fertilizers or landfill. The waterworks reconstruction design, need to transform Orbal oxidation ditch regulation pool, pool, intermediate, integrated processing equipment (with the biological aerated filter) and reuse water tank construction, the system has the advantages of high efficiency, energy-saving features, and resistance to shock loading, good water quality.Through the implementation of the project, Yushe county sewage treatment plant after the upgrade to the standard, the average effluent COD concentration of25.98mg/L, the average removal rate was90.77%, the effluent NH3-N average concentration of6.28mg/L, the average removal rate was83.65%, the effluent TP average concentration of0.48mg/L, the average removal rate was81.53%; the sewage treatment plant water reuse wastewater reused, Yushe chemical Limited by Share Ltd production system, not only for Yushe chemical Limited by Share Ltd saving water1277500tons, and each year can reduce COD emissions472.85tons, reducing SS emissions272tons, reducing TN emissions66.02tons, reducing TP emissions of3.84tons. To make a certain contribution for the Yushe county environmental protection level and the level of clean production.In this paper, from the theory and practice of the process of transformation of Obel oxidation ditch and upgrading and reuse of discussion and describes the engineering construction mode, and the sewage treatment plant costs and benefits are analyzed, providing some reference for the staff to new as well as the new test and operation of sewage treatment plant.