水解酸化-接触氧化-混凝气浮工艺处理高浓度漂染废水

本文介绍了水解酸化 -接触氧化 -混凝气浮工艺在处理高浓度漂染废水中的工程应用。结果表明 ,漂染废水经该工艺处理后CODCr去除率为 95 % ,色度去除率为 90 %。该工艺具有占地面积小 ,脱色效果好 ,处理效率高等特点 ,能广泛应用于纺织漂染废水的实际工程中     

混凝-催化氧化-水解酸化-生物接触氧化法处理染料废水的中试研究

采用混凝-催化氧化-水解酸化-生物接触氧化法处理高浓度难降解分散染料废水.比较分析了O_3、UV/TiO_2/O_3,UV/O_3/H_2O_23种高级氧化法的处理效果.结果表明,UV/TiO_2/O_3对废水COD和色度有较高的去除率.可明显改善废水的可生化性,废水的BOD_5/COD由0.05～0.07升高至0.42～0.46.在混凝沉淀单元HRT为1.5 h.催化氧化单元(UV/TiO_2/O_3)HRT为3.0 h,水解酸化HRT为10.0 h,生物接触氧化HRT为10.0 h的最佳条件下,该组合工艺对废水COD和色度总的去除率分别可达95.0%、99.5%.     

水解酸化—接触氧化—混凝气浮工艺处理高浓度漂染废水

本文介绍了水解酸化－接触氧化－混凝气浮工艺在处理高浓度漂染废水中的工程应用。结果表明，漂染废水经该工艺处理后CODCr去除率为95％，色度去除率为90％。该工艺具有占地面积小，脱色效果好，处理效率高等特点，能广泛应用于纺织漂染废水的实际工程中。     

Fenton-水解酸化-接触氧化处理模拟磷霉素钠制药废水

对模拟磷霉素钠制药废水进行Fenton-水解酸化-接触氧化小试处理实验,考察了COD、有机磷的去除效果,并对处理前后的废水进行了GC-MS分析。结果显示,增加了Fenton预处理后磷霉素钠制药废水的COD和有机磷分别降低到100和2 mg/L,去除率均可达87%以上,出水COD满足化学制药行业污染物排放标准(GB 21904-2008);Fenton过程对制药厂废水中的复杂有机物去除效果明显,GC-MS结果表明,出水中基本检测不到复杂有机物。与制药厂采用的水解酸化-接触氧化处理效果相比,增加Fenton预处理可以提高废水的可生化性和系统的处理效率。     

酸析预处理-A/O法处理碱减量印染废水

印染行业排放的碱减量废水是一股水量少、浓度高、碱性大、污染十分严重的有机废水,针对该股废水难以降解,提出酸析预处理-兼氧(两段水解酸化)-生物接触氧化法相结合的处理工艺.试验表明经酸析预处理的碱减量废水与印染废水混合进行水解酸化、好氧处理,废水中的特征污染物对苯二甲酸(TA)是可生化的.并且,当进水中的CODcr为0.6～1.0g/L、BOD5为0.22～0.35g/L、TA为0.13～0.28g/L、色度为300～400倍时,系统的CODcr、BOD5、TA、色度的去除率分别为92%、95%、96%和90%,最终出水水质均能达标排放.同时,把二沉池排出的污泥回流至水解酸化池进行污泥减容化,还可以降低污泥的处理成本.     

混凝—生物接触氧化法处理印染废水工艺探讨

介绍了混凝—水解酸化—接触氧化—混凝气浮处理印染废水的工程应用。结果表明 ,印染废水经该工艺处理后 ,CODCr去除率达 95 % ,色度去除率达 90 % ,该工艺具有占地面积小 ,脱色效果好 ,处理效率高等特点 ,能广泛应用于纺织印染废水的实际工程中     

聚酯废水处理实例

将聚酯生产的高浓度废水，经水解酸化预处理后，与低浓度废水混合，再经二段生物接触氧化和混凝沉淀处理，出水COD值可达30mg／L左右。     

纺织印染废水治理工程设计

采用混凝沉淀 -酸化水解 -生物接触氧化工艺处理纺织印染废水。工程实践运行表明 ,该工艺处理效果好、运行稳定、投资省     

内电解-水解酸化-接触氧化-氧化絮凝处理印染废水研究

采用内电解-水解酸化-接触氧化-氧化絮凝处理印染废水,考察了内电解反应中进水pH、反应时间、反应温度、鲍尔环填料中铁粉与焦炭质量比(简称Fe/C)对废水COD和色度去除效果的影响;在实验所得最佳条件下,内电解反应对废水中NH3-N和TP的去除效果;水解酸化-接触氧化对内电解出水的COD和NH3-N的去除效果及反应前后的...     

混凝-水解-接触氧化-气浮工艺处理印染废水

采用混凝-水解酸化-接触氧化-气浮工艺，处理印染废水，运行结果表明：对CODcr SS、色度的去除率分别为91．5％、92％、90％，出水达到《纺织染整工业水污染排放标准》（GB4287—92）的一级标准。     

废水催化湿式氧化稀土金属氧化物催化剂的研制

采用共沉淀法制得锰铈复合氧化物催化剂,催化湿式氧化处理高浓度苯酚废水。通过正交实验筛选催化剂制备条件,单因素实验优化制得催化剂。研究了CWAO处理废水条件下的金属离子溶出和催化剂的表征。结果表明,该催化剂在低温低压条件下具有优良的湿式氧化催化活性,且金属离子溶出量低,是一种CWAO处理高浓度有机废水中极具应用前景的新型高效催化剂。     

两相分配式生物反应器处理高盐废水中的苯酚

采用新型两相分配式生物反应器(TPPB)和前期研究得到的高效苯酚降解菌对高盐废水中苯酚的降解进行研究,研究中确定煤油为反应系统的最佳有机溶剂,并考察了废水苯酚含量、废水盐度以及搅拌器搅拌速度对苯酚降解的影响。结果表明,反应系统能正常降解苯酚含量为1 000～2 500 mg/L的高盐苯酚废水;反应系统在含盐量为100 g NaCl/L、搅拌速度为50 r/min的运行工况条件下,降解时间缩短为52 h,总酚去除率为20.58 mg/(L.h)。     

Treatment of coking wastewater by an advanced Fenton oxidation process using iron powder and hydrogen peroxide

In this study the treatment of coking wastewater was investigated by an advanced Fenton oxidation process using iron powder and hydrogen peroxide. Particular attention was paid to the effect of initial pH, dosage of H₂O₂ and to improvement in biodegradation. The results showed that higher COD and total phenol removal rates were achieved with a decrease in initial pH and an increase in H₂O₂ dosage. At an initial pH of less than 6.5 and H₂O₂ concentration of 0.3 M, COD removal reached 44-50% and approximately 95% of total phenol removal was achieved at a reaction time of 1 h. The oxygen uptake rate of the effluent measured at a reaction time of 1 h increased by approximately 65% compared to that of the raw coking wastewater. This indicated that biodegradation of the coking wastewater was significantly improved. Several organic compounds, including bifuran, quinoline, resorcinol and benzofuranol were removed completely as determined by GC-MS analysis. The advanced Fenton oxidation process is an effective pretreatment method for the removal of organic pollutants from coking wastewater. This process increases biodegradation, and may be combined with a classical biological process to achieve effluent of high quality.     

高酚焦化废水萃取脱酚预处理

为了降低高酚焦化废水中挥发酚的浓度，实验研究了磷酸三丁酯煤油溶液在不同条件下对高酚焦化废水进行萃取脱酚预处理的效果。结果表明，萃取时间为8min，磷酸三丁酯煤油浓度为30％，温度低于40％，pH低于8．0，萃取比（油／水）R=1：2时，经过萃取后分水挥发酚浓度由4165mg降低到127．62mg／L，去除率高达96．94％，为后续生化处理奠定了基础。而萃取剂经过氢氧化钠溶液反萃取再生后，萃取剂的回收利用率可达94．25％以上。     

炼油厂汽提废水预处理工业试验

炼油厂汽提废水含较高浓度的酚 ,会对污水处理场产生冲击。采用上流式曝气生物滤池对废水进行预处理工业试验 ,取得了满意的试验结果 :出水酚浓度低于 9.0mg/L ,酚降解率 >90 % ,完全可以消除它对污水处理场的冲击。并通过工业试验为工艺设计和工业运行确定了有关参数和运行条件。     

Elimination of phenol and aromatic compounds by zero valent iron and EDTA at low temperature and atmospheric pressure

This work deals with a new abiotic oxidation process designed as a suitable pre-treatment step within a biological depuration of wastewater containing phenol or its derivatives (o-cresol, 2-chlorophenol and p-nitrophenol) or aniline. The reaction was carried out in a stirred tank reactor at 20 degrees C and atmospheric pressure in presence of the organic compound, 150mgl(-1), zero valent iron particles (10g), ethylenediamine tetraacetic acid (EDTA, 101mgl(-1)) and air. The experimental results show that 85% of phenol conversion can be achieved after 360min. 2-Chlorophenol was found to be more easily degradable and it is completely eliminated after 300min. The oxidation of o-cresol and aniline behaved more closely to phenol obtaining after 360min 70% and 68% of conversion respectively. p-Nitrophenol was a very refractory compound, giving only 28% of conversion after 360min. Moreover, the influence of some operating variables was studied over the following ranges: temperature from 20 to 50 degrees C, initial phenol concentration from 150 to 1000mgl(-1), EDTA concentration from 50 to 200mgl(-1) and iron particles from 5 to 20g. As expected, temperature strongly enhances phenol conversion. Also, an increase of the catalyst to phenol ratio or the iron or EDTA to phenol ratio improves the reaction rate. A preliminary kinetic analysis of the data shown that the rate of phenol disappearance is not first order with respect to the phenol.     

三维电极/电-Fenton法降解苯酚

采用电-Fenton耦合三维电极法处理苯酚模拟废水，研究了活性炭作为第三电极的三维电极体系中苯酚的去除效果，重点考察了常温下初始pH值、电流强度、Fe²⁺浓度等因素对苯酚降解的影响。结果表明：在常温下，曝气速率20 L/min，初始pH=3，电流强度为0.3 A/m²，Fe²⁺浓度为0.1 mmol/L，反应时间60 min时，废水的苯酚的氧化降解率为91%，COD去除率为64%。在此条件下，三维电极/电-Fenton表现出较强的氧化能力，具有较好的去除效果，可应用于含苯酚废水的处理。     

微电解与Fenton试剂预处理农药废水的试验研究

农药废水是一种典型的高浓度有机工业废水 ,有机污染物浓度高 (CODCr>10 0 0 0mg L) ,可生化性差 (氯苯农药废水BOD5 CODCr=0 .0 3 ,对邻硝基氯苯农药废水BOD5 CODCr=0 .0 5 )。采用微电解和Fenton试剂氧化两种物化手段对菊酯、氯苯和对邻硝氯苯 3种废水按比例配制而成的综合农药废水进行预处理 ,结果表明 :在废水pH为 2— 2 .5时 ,经微电解处理后 ,BOD5 CODCr比值在 0 .45以上 ,可生化性提高 ;Fenton试剂对综合农药废水CODCr去除率为 60 %左右 ,色度去除率接近 10 0 %     

Fe (III) supported on resin as effective catalyst for the heterogeneous oxidation of phenol in aqueous solution

FeIII supported on resin as an effective catalyst for oxidation was prepared and applied for the degradation of aqueous phenol. Phenol was selected as a model pollutant and the catalytic oxidation was carried out in a batch reactor using hydrogen peroxide as the oxidant. The influent factors on oxidation, such as catalyst dosage, H2O2 concentration, pH, and phenol concentration were examined by considering both phenol conversion and chemical oxygen demand (COD) removal. The FeIII-resin catalyst possesses a high oxidation activity for phenol degradation in aqueous solution. The experimental results of this study show that almost 100% phenol conversion and over 80% COD removal can be achieved with the FeIII-resin catalyst catalytic oxidation system. A series of prepared resin were investigated for improving the oxidation efficiency. It was found that the reaction temperature and initial pH in solution significantly affected both of phenol conversion and COD removal efficiency. The activity of the catalyst significantly decreased at high pH, which was similar to the Fenton-like reaction mechanism. Results in this study indicate that the FeIII-resin catalytic oxidation process is an efficient method for the treatment of phenolic wastewater.     

褐煤活性炭吸附处理焦化废水

研究褐煤活性炭吸附处理焦化废水的性能，为褐煤活性炭用于废水处理提供理论依据和技术指导。以河南某气化厂的焦化废水为吸附原水，进行褐煤活性炭对酚吸附性能的静态和动态实验。静态实验表明，褐煤活性炭对酚的吸附性能符合弗兰德里希（Freundlich）吸附方程式。在室温条件下，对于150 mL焦化废水，当活性炭的用量为10 g，吸附反应时间为1 h，酚的去除率可达92%以上。动态实验研究表明，当进水酚浓度为3 800 mg/L，吸附1.5 h，活性炭的吸附容量可达21.38 mg/g。水处理的实验研究表明，利用褐煤制备的活性炭，对焦化废水具有良好的处理效果。