Treatment of pharmaceutical wastewater containing recalcitrant compounds in a Fenton-coagulation process

The advanced treatment using integrated Fenton＇s reaction and coagulation process was investigated in this study. Before the advancement, the pharmaceutical wastewater containing lincomycin hydrochloride was pretreated by UASB （upflow anaerobic sludge bed） and a SBR （sequencing batch reactor） process. The residual recalcitrant compounds, measured by gas chromatographymass spectrometry （GC-MS）, mainly consisted of alcohols, phenols, and nitrogenous and sulfur compounds. The experimental results indicated that when the Fenton＇s reaction was conducted at pH=3.0, H2O2CODOcr=0.27, H2O2/Fe^2＋=3：1 and 30 min of reaction time, and the coagulation process operated at a sulfate aluminum concentration of 800 mg/L and pH value of 5.0, the color and COD in the wastewater decreased by 94% and 73%, respectively; with a finale COD concentration of 267 mg/L and color level of 40 units, meeting the secondary standard of GB8978-1996 for industrial wastewater.     

高负荷生物滤池处理城市污水研究进展

高负荷生物滤池中试研究在城市污水处理厂内进行,进水BOD5为 118mg L。水力负荷在 10～ 2 6m3/m2 ·d的范围内对去除率有着十分显著的影响。在水力负荷HL =10m3/m2 ·d的操作条件下,该反应器对BOD5的去除率平均达到 80 %。通过实验观察发现,基于水力负荷的设计方程可以很好的反映BOD5的浓度     

Synchronous municipal sewerage-sludge stabilization

IntroductionThemainpurposeofwastewatertreatmentistoremovesolidsandBODfromthewastewaterbeforetheliquideffluentisreleasedtoaconvenient,nearbybodyofwater.Whatremainstobedisposedofisamixtureofsolidsandwater,calledsludge.Thecollection,processing,anddisposalofsludgecanbethemostcostlyandcomplexaspectofwastewatertreatment.Manydevelopingcountriescannotaffordthecostofthesludgewastingline.Thereforetheaimoftheresearchwastodevelopasystemthatcansimultaneouslyachievewastewaterandsludgestabilizationusinginn…