水解＋A／O法处理难降解石化废水的应用研究

通过实验研究探讨水解＋A／O法对石化废水的处理效果、处理机理和工艺适应性,为解决废水处理,寻求技术可行经济适用的处理方案。通过分析废水COD和氨氮等指标的变化规律,得出水解＋A／O工艺的有效运行控制参数,正确的指导运行,使石化废水达标排放,同时也为类似难降解废水处理的实际运行提供技术依据。     

低浓度废水化学需氧量的测定方法比较

比较了回流法和分光光度法测定低浓度废水化学需氧量（CODcr）的分析结果,在保证较高的准确度和精密度的前提条件下,后者能大量减少试剂用量,缩短分析时间。     

Electricity generation and brewery wastewater treatment from sequential anode-cathode microbial fuel cell

A sequential anode-cathode double-chamber microbial fuel cell (MFC), in which the effluent of anode chamber was used as a continuous feed for an aerated cathode chamber, was constructed in this experiment to investigate the performance of brewery wastewater treatment in conjugation with electricity generation. Carbon fiber was used as anode and plain carbon felt with biofilm as cathode. When hydraulic retention time (HRT) was 14.7 h, a relatively high chemical oxygen demand (COD) removal efficiency of 91.7%–95.7% was achieved under long-term stable operation. The MFC displayed an open circuit voltage of 0.434 V and a maximum power density of 830 mW/m3 at an external resistance of 300 ?. To estimate the electrochemical performance of the MFC, electrochemical measurements were carried out and showed that polarization resistance of anode was the major limiting factor in the MFC. Since a high COD removal efficiency was achieved, we conclude that the sequential anode-cathode MFC constructed with bio-cathode in this experiment could provide a new approach for brewery wastewater treatment.     

On an ecology-friendly treatment reagent for oily wastewater

Bioflocculants have received increasing attention in research because they are low cost, non-toxic, biodegradable, operationally simple and useful in many water and wastewater treatment applications. In this study, we focused mainly on the screening of the flocculant-producing strain and its application in oily wastewater treatment. Bacteria strain B-6-1 was isolated by the pyridine screening method. UPC-1 reagent produced by B-6-1 had efficient flocculating activity. It was deduced that the main component of UPC-1 reagent was polysaccharide through purification and analysis. The influence of dosage of reagent, pH value, temperature and oil concentration on the flocculation effect of UPC-1 reagent was investigated.     

利用Fenton试剂去除焦化废水中的氰化物

研究了在pH=3时,在Fenton试剂存在下,水中氰化物与Fe2＋、H2O2反应,通过分离生成的亚铁氰化铁沉淀,高效去除了氰化物。除氰过程中,Fenton起到了协同和强化作用,用于焦化废水的深度处理,总氰化物的去除率达到98%以上,浓度低于0.1mg/L,并有效地降低了水的浊度等指标。     

钛白废水综合治理工艺探讨

钛白废水综合治理工艺作为一个系统工程构思,在明确钛白废水产生原因及主要污染因子后,首先提出钛白废水一次石粉中和,经压滤得到白石膏和FeSO4溶液,然后按FeSO4溶液浓度的高、低分别处理:高浓度FeSO4溶液用于制备铁红晶种;低浓度FeSO4溶液则进行二次石灰乳中和,经压滤得到红石膏和回收水。该方案不仅能较好地治理钛白废水,得到高价值副产品,而且治理成本低,使用设备简单。     

淀粉废水处理工程示范研究

木薯淀粉废水具有COD、BOD浓度高、可生化性好的特点,采用UASB-CASS-混凝工艺处理,处理后出水水质稳定达到《污水综合排放标准》(GB8978-1996)中的一级标准。工程实践研究表明,该组合工艺具有运行效果稳定、运行费用低、可回收能源等优点。     

UASB工艺在污水处理中的应用前景

该文介绍了上流式污泥床(UASB)反应器的工艺特点及其在不同性质的污水处理中的应用情况和处理效果。     

酶催化技术在印染废水处理中的应用

针对目前印染废水处理工艺的问题,提出应用生物酶催化技术处理印染废水的工艺,可以高效迅速降解污染物浓度,提高废水的可生化性,减少处理投资及费用,改善环境污染状况。     

掺杂La-Nd混合元素的电极制备及其在酱油废水处理中的应用

采用溶胶凝胶法制备了掺杂La-Nd混合元素的Ti/Sb-SnO2电极,掺杂比例为Sn∶Sb∶La∶Nd=100∶10∶5∶4(原子质量比),通过正交实验确定该电极处理酱油废水的最佳工艺条件:电流密度40mA/cm2,电解时间90 min,极板间距4.0cm,pH值为5,在此条件下电极对酱油废水COD和色度的去除率分别为34.3%和90.11%,达到了预处理要求。