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1.
文章以经A2/O生化法处理后的焦化废水为研究对象,采用混凝-Fenton法对其进行深度处理。确定了聚合硫酸铁等铁盐处理焦化废水的最佳投药量和pH值,讨论了影响其混凝效果的主要因素。处理后出水的COD去除率达40%以上。混凝剂处理焦化生化外排水中的难降解有机物,COD去除率只有40%左右,经过Fenton试剂氧化后,去除率可以达到70%左右,外排水能够达到国家排放标准。  相似文献   

2.
工业废水处理过程中,如何有效控制氨氮浓度,是废水排放重要的工艺之一。金鱼藻是常见的水生植物,对水质具有较强的净化作用,本实验通过模拟氨氮污染的培养环境,研究不同氮浓度对金鱼藻去除氮能力的影响。结果表明,氮浓度不高于10 mg/L时,处理7 d后水体中氨氮的去除率接近90%;在氨氮浓度分别为20 mg/L和50 mg/L时,经过35 d的处理,氨氮去除率分别为85%和66%,金鱼藻吸收富集的氮含量随着培养水体中氮浓度升高而增加,且不同部位间吸附含量在高浓度情况下差异较为明显。使用金鱼藻对实际工业废水进行氨氮去除处理,去除率达到73%。将植物吸附污染物应用在工业废水处理工艺中具有一定的前景,值得深入研究。  相似文献   

3.
卢燕  朱凡 《干旱环境监测》2007,21(3):163-165,175
医药化工废水作为一种高浓度、难降解有机废水,其预处理效果直接影响到最终出水水质.以硝基苯类废水为处理对象,采用先进微电解-SBR组合工艺技术进行处理试验.结果表明,经微电解处理医药废水硝基苯类、COD的去除率分别为93%和45%左右.废水的可生化性由约0.24提高到0.55.每吨废水处理成本为2.52元.  相似文献   

4.
在污水处理效果评价过程中,确切计算污水去除率是评价污水处理效果的依据之一。用不同的评价模式及方法则得到不同的评价结论,给污水处理设施验收结果带来影响。因此,综合多方面的定性、定量因素,并将这些因素有机地结合起来,应用数理统计法建立一种污水去除率评价方法是十分必要的。1 评价方法的建立在常规去除率评价中,应用以下2种模式:方法一,在污水排放高峰时间取处理前、处理后水样,测定污染物浓度,计算去除率;方法二,在一段时间内每间隔相同的时间取处理前、处理后水样,测定污染物浓度,计算去除率。这2种方法均忽略…  相似文献   

5.
利用废铁屑和粉煤灰的电化学原理处理印染废水的方法研究   总被引:15,自引:0,他引:15  
提出一种改进的铁屑法处理印染废水 ,对其机理进行探讨 ,并确定工艺条件为 p H4.0 ,处理时间 3 0 min,铁屑和粉煤灰的投加率分别为 5 %和 6%时 ,CODcr可降至 40 0 mg/L以下 ,去除率达 77%以上 ,脱色率 95 %以上 ,是一种高效可行的印染废水预处理方法  相似文献   

6.
H103大孔树脂吸附苯酚性能研究   总被引:2,自引:0,他引:2  
通过静态吸附试验,研究了不同条件下H103大孔树脂对水中苯酚的吸附性能。结果表明,树脂对水中苯酚的吸附速率较快,60min内基本达到平衡。树脂对水中苯酚的吸附量随其初始浓度的增加而增加,并呈线性关系。Freundlich模型能很好地描述H103大孔树脂对苯酚的吸附性能。动态处理某精细化工含酚废水结果表明,在室温下,固定床流速为3BV/h时,水中苯酚去除率接近91.9%,CODcr去除率≥69.3%。采用5%NaOH再生,再生率为86.5%,实现了酚的回收。  相似文献   

7.
杨静 《中国环境监测》2020,36(4):145-153
为测定被污染土壤中的低浓度苦味酸和联苯胺,研究建立了一种基于高效液相色谱-串联三重四级杆质谱检测技术的分析方法,实现了超声波乙酸乙酯溶剂萃取后直接进样的高效定性和定量检测。研究表明,在0.5~100.0μg/L质量浓度范围内,目标化合物的线性关系良好(r0.999 9),苦味酸、联苯胺的检出限分别为0.16、0.30μg/kg,精密度相对标准偏差为1.5%~5.8%,加标回收率范围为70.1%~111.0%。该方法灵敏度高、前处理步骤简便,适用于低含量苦味酸和联苯胺的土壤测定。实验表明,以碱性木素为原料,采用热解法在氮气氛围下600℃煅烧得到的生物质炭,对土壤中联苯胺的去除率高达98.2%,对苦味酸的去除率超过50%,可有效实现污染土壤的修复。  相似文献   

8.
采用水解酸化+CASS工艺处理半夏泡制废水,工程运行结果表明,在进水COD、NH3-N、SS的质量浓度分别为1800~2200mg/L、60~80mg/L、500~800mg/L时,经该工艺处理后,废水中的COD、NH3-N和SS总去除率可分别达到97.7%、96.3%和95%以上,出水达到《污水综合排放标准》(GB8978-1996)表4一级标准限值。该工艺运行稳定、处理效果好,运行费用低。  相似文献   

9.
阿图什氧化塘污水处理效果分析   总被引:1,自引:0,他引:1  
为了解阿图什氧化塘的污水处理效果,分别于2007年3月和6月对该氧化塘的进、出水水质进行了监测.结果表明:阿图什氧化塘对挥发酚、生化需氧量、氨氮、化学需氧量、悬浮物的去除率较高,达50%以上,而对磷和部分重金属的去除率小于30%,比较低;氧化塘的污水处理效果夏季好于春季;氧化塘出水水质没有完全达到<农田灌溉水质标准>(GB 5084-92)中的旱作标准,与设计要求有一定差距,而且与国家相关排放标准相比,也存在较大差距,但处理后的污水适合外排用于灌溉荒漠植被和经济林,而且可产生良好的生态效益和经济效益.  相似文献   

10.
馏化法处理高浓度难生化有机化工废水的试验研究   总被引:1,自引:0,他引:1  
对馏化技术处理高浓度有机化工废水的原理与工艺进行了研究,结果表明,馏化技术对废水中CODcr的去除率可达98%以上,同时可回收有用的化工原料.与其他物化方法相比,具有操作工艺简单,处理效率高,是一种适用于高浓度难生化有机化工废水处理的工艺。  相似文献   

11.
环氧树脂生产废水常温常压下催化氧化处理方法研究   总被引:1,自引:0,他引:1  
采用常温常压催化氧化工艺处理环氧树脂生产废水,通过实验发现,采用南京博环环保有限公司开发的负载型催化剂可以获得较好的效果.在常温常压,进水pH为3.5~5.5,氧化时间为0.5h的条件下,COD的去除率可达到85%.  相似文献   

12.
Wastewater reuse can significantly reduce environmental pollution and save the water sources. The study selected Cheng-Ching Lake water treatment plant in southern Taiwan to discuss the feasibility of wastewater recycling and treatment efficiency of wastewater treatment units. The treatment units of this plant include wastewater basin, sedimentation basin, sludge thickener and sludge dewatering facility. In this study, the treatment efficiency of SS and turbidity were 48.35–99.68% and 24.15–99.36%, respectively, showing the significant removal efficiency of the wastewater process. However, the removal efficiencies of NH3–N, total organic carbon (TOC) and chemical oxygen demand (COD) are limited by wastewater treatment processes. Because NH3–N, TOC and COD of the mixing supernatant and raw water are regulated raw water quality standards, supernatant reuse is feasible and workable during wastewater processes at this plant. Overall, analytical results indicated that supernatant reuse is feasible.  相似文献   

13.
针对铝材企业NH4HF2表面处理废水含有高浓度的NHs-N和F-等特点,采用气浮+磷酸铵镁(MAP)化学沉淀法对NH4HF2废水进行预处理,可达到目标处理效果,再引入氧化废水池进一步处理,继而达标排放.经验证,该方法是一种技术可行、经济合理的NH4 HF2废水处理方法.  相似文献   

14.
造纸行业是废水污染物减排重点行业。以2011—2014年全国环境统计调查数据为基础,对不同规模造纸企业废水治理运行费用和绩效进行了分析,对COD、氨氮排放强度及减排潜力进行了对比。结果表明,不同规模企业污染治理与排放特征存在差异,大中型企业产排污强度低,废水治理投入大;若造纸行业企业全部达标排放,COD排放量在2014年水平上减排21.4%~47.2%,氨氮排放量降低27.7%。  相似文献   

15.
To keep pace with population and economic growth, the city of Hyderabad, India, will need to identify and develop new supply sources almost continually. Increasing population growth rate, declining surface water resources, overexploitation of groundwater, deterioration of ground water quality and poor sewage treatment are the major water-related issues in Hyderabad. This paper reviews the current situation facing policy makers who need to come to terms with the problem of restricted water supply and increasing demand in an urban centre such as Hyderabad, India. The City Water Balance model developed in this study can be used to analyse different scenarios that include water conservation, urban wastewater reuse and improvement of distribution and conveyance efficiency. Water conservation programs, which include a 5% conveyance efficiency improvement, reusing 90 million cubic metres (MCM) of urban runoff and adoption of water harvesting by 0.5 million households together with recycling 120 MCM of wastewater recycling wastewater would be sufficient to meet the water demand by 2031, if the population grows at a rate of 2.5%.  相似文献   

16.
分析和统计的86家印染工业企业当中,废水总排口中的总锑超标率为25.6%,质量浓度0.050 mg/L以下较低排放浓度所占比例最大,达62.8%。印染废水锑排放源主要有涤棉和涤纶化纤类布料的染色、印花工艺废水,碱减量工艺废水等,工业液碱、废酸以及硫酸铝污水处理剂等原料当中含锑浓度较高。印染废水经污水处理厂集中纳管深度处理后,锑排放浓度较低,锑去除效率最高达到88.0%,大大降低了环境地表水体锑污染的风险。  相似文献   

17.
The reuse of treated municipal wastewater should be one of the new water resource target areas. The suitability of the reuse of wastewater for agricultural irrigation has to consider health risk, soil contamination and the influence of the reclaimed water on crop growth. In this work the aim is to use quantitative risk analysis to assess the health effects related to reclaimed water quality and to calculate the loading capacity of reclaimed wastewater in terms of the heavy metal accumulation. The results of chemical risk assessment show there would be slightly significant health risk and what risk there is can be limited within an acceptable level. The following exposure pathway: reclaimed water-->surface water-->fish (shellfish)-->human, and arsenic risks are of more concern. In terms of reuse impact in soil contamination, the most possible heavy metal caused accumulation is arsenic. The irrigative quantity has to reach 13,300 m(3)/ha to cause arsenic accumulation. However, only 12,000 m(3)/ha is essential for rice paddy cropland. The high total nitrogen of reclaimed water from secondary treatment makes it unfavorable for crop growth. The recommended dilution ratio is 50% during the growth period and 25% during the maturity period.  相似文献   

18.
改进的还原偶氮光度法同时快速测定水中硝基苯和苯胺   总被引:1,自引:1,他引:0  
对测定方法进行了改进,建立了用还原-偶氮分光光度法同时快速测定水中硝基苯和苯胺的分析方法。根据实验原理,对样品前处理装置进行了改进,实验步骤得到了简化,避免了样品溶液过滤转移过程造成样品损失,使样品前处理实验效率提高了90%以上;改进后的测定方法不仅可快速测定样品中硝基苯,还可同时测定样品中苯胺;达到了用一种分析方法同时测定样品中两种污染物的目的。方法精密度测定结果,相对标准偏差(n=6,RSD)为1.9%~3.2%;对硝基苯、苯胺混合标准样品以及实际废水样品进行了测定,并与原测定方法及苯胺国标测定方法进行了比对实验;测定结果具有一致性。加标实验回收率为96%~101%,表明方法准确可靠,可用于水和废水中硝基苯或硝基苯和苯胺的同时测定。  相似文献   

19.
The physical, chemical, and biological indices of aircraft liquid wastes collected from multiple airplanes at Longjia Airport, Changchun, China were measured according to "Integrated Wastewater Discharge Standard," evaluating treatment efficiency of resolvable sanitizing liquid. The results indicate that, after being treated by the resolvable sanitizing liquid, the indices of all first-class pollutants met the requirements of the standard, while among the second-class pollutants, the suspension content, biochemical oxygen demand after 5 days, and chemical oxygen demand as well as the contents of amino nitrogen, total phosphorus, anionic surfactants, total copper, absorbable organic halogen, and phenolic compounds did not reach the discharge standard. Particularly, the level of fecal coliform bacteria in the aircraft liquid wastes can meet the standard specification by adding more than 1 mL/L resolvable sanitizing liquid. The aircraft wastewater treated by resolvable sanitizing liquid cannot be directly discharged back into the environment as well as urban drainage systems.  相似文献   

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