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1.
孙光玲  王海瑜  唐俊岩 《硅谷》2013,(10):135-135,134
本文通过采用COD消解加热器消解,相对于传统的检测总磷的方法来说,建立了快速测定水中总磷的分析方法。通过对本法的多次实验的结果分析,并与标准方法所得到的结果进行比较分析得出了COD消解加热器消解测定总磷的方法是一种耗时少、具有较高准确度和精密度等优点的检测总磷方法。  相似文献   

2.
为考察化学除磷对膜生物反应器(MBR)工艺的影响,研究了MBR城市污水处理工艺的化学除磷.结果表明:在MBR工艺中,硫酸亚铁是适宜的化学除磷药剂.膜分离对出水总磷的截留有重要贡献,在MBR工艺中实施化学除磷比传统活性污泥法节省加药量.在处理实际城市污水的MBR工程中进行了一年以上的硫酸亚铁连续投加试验,出水总磷浓度为(0.17±0.08)mg/L,平均总磷去除率达95.0%,跨膜压差维持在15kPa以下,药剂投加费用约为0.01元/m3.在MBR工艺中投加硫酸亚铁进行化学除磷,不仅可以取得很好的除磷效果,对膜污染控制也不会造成明显的影响,而且经济可行.  相似文献   

3.
为建立测定地表水中总磷的离子色谱法,采用碱性过硫酸钾消解地表水样,OnGuard Ⅱ Ba柱过滤去除消解液中大量硫酸盐,离子色谱法测定总磷含量。对实际水样进行分析,总磷的加标回收率为94.6%~105.7%。该方法测定结果准确,具有一定的应用价值。  相似文献   

4.
本文介绍了在污水处理厂中应用的生物除臭3种方法:生物滤池法、洗涤式活性污泥法以及曝气式活性污泥法并结合案例进行分析,总结出活性污泥法是目前处理城市和工业污水普遍采用的好氧生化处理技术.其工艺流程较为简单,处理成本低,而处理效果好,BOD/COD去除率高。  相似文献   

5.
活性污泥法是至今为止应用最为广泛的水处理方法,其主体是活性污泥。处理出水的效果好坏直接跟活性污泥有莫大的关系。因此,活性污泥中微生物群落的多样性成为当今研究的热点。本文针对活性污泥中微生物群落的组成及特点,探讨了目前比较成熟而先进的微生物的研究技术。  相似文献   

6.
<正>西德巴登公司路维德希港工厂,污水处理设施的最大特点,是在进行活性污泥处理时采用充氧曝气。在五个活性污泥处理池上各设有22个充氧器,每天通入大约3万吨氧气(约876000标米~3/时)。由于采用充氧曝气,使活性污泥处理时间缩短到10~12小时。  相似文献   

7.
13X分子筛处理电镀废水   总被引:1,自引:0,他引:1  
陈卫平 《材料保护》2001,34(2):45-46
1 前 言电镀废水中含有大量重金属离子和少量有机物 ,这种废水不能直接采用活性污泥法来处理。因为活性污泥法只处理废水中的有机物 ,并且废水中的大量重金属离子会对活性污泥产生毒害作用。过去我厂对这种废水的预处理是采用加碱沉淀法 ,但一段时间的运行发现 ,由于电镀废水中存在多种重金属离子 ,用这种方法很难控制加碱量 ,而且不能连续进行处理 ,处理成本较高。现在我厂采用 13X分子筛对这种废水进行预处理试验。13X分子筛之所以能有效地去除电镀废水中的重金属离子 ,是因为其特殊的结构。 13X分子筛具有很大的地表面积 ,表面可以…  相似文献   

8.
本文根据国标法过硫酸钾消解钼酸铵分光光度法(GB/T11893~1989)存在的一些普遍问题,结合在工作中总结出的方法借用COD消解思路优化、建立快速测定地表水水质总磷国标分析方法,通过对本法从测定条件、准确度、精密度等方面多次实验,并与标准方法进行比较分析结果,同时对优化国标方法测总磷应注意有关问题进行了探讨。  相似文献   

9.
秦金鑫 《中国科技博览》2012,(35):339-339,326
SBR是序列间歇式活性污泥法(SequencingBatchReactorActivatedSludgeProcess)的简称,是一种按间歇曝气方式来运行的活性污泥污水处理技术,又称序批式活性污泥法。本公司污水处理站即采用此处理工艺来处理大氦肥装置气化炉在生产运行过程中所产生的灰水进行处理。  相似文献   

10.
分析了分光光度法测饲料中总磷含量,不确定度分量的来源,确定了各个不确定度分量值,给出了饲料中总磷含量测定的扩展不确定度。  相似文献   

11.
《工程(英文)》2017,3(3):330-342
Wastewater treatment is a process that is vital to protecting both the environment and human health. At present, the most cost-effective way of treating wastewater is with biological treatment processes such as the activated sludge process, despite their long operating times. However, population increases have created a demand for more efficient means of wastewater treatment. Fluidization has been demonstrated to increase the efficiency of many processes in chemical and biochemical engineering, but it has not been widely used in large-scale wastewater treatment. At the University of Western Ontario, the circulating fluidized-bed bioreactor (CFBBR) was developed for treating wastewater. In this process, carrier particles develop a biofilm composed of bacteria and other microbes. The excellent mixing and mass transfer characteristics inherent to fluidization make this process very effective at treating both municipal and industrial wastewater. Studies of lab- and pilot-scale systems showed that the CFBBR can remove over 90% of the influent organic matter and 80% of the nitrogen, and produces less than one-third as much biological sludge as the activated sludge process. Due to its high efficiency, the CFBBR can also be used to treat wastewaters with high organic solid concentrations, which are more difficult to treat with conventional methods because they require longer residence times; the CFBBR can also be used to reduce the system size and footprint. In addition, it is much better at handling and recovering from dynamic loadings (i.e., varying influent volume and concentrations) than current systems. Overall, the CFBBR has been shown to be a very effective means of treating wastewater, and to be capable of treating larger volumes of wastewater using a smaller reactor volume and a shorter residence time. In addition, its compact design holds potential for more geographically localized and isolated wastewater treatment systems.  相似文献   

12.
泥磷的处理方法研究   总被引:5,自引:0,他引:5  
针对当前泥磷处理方法单一、污染严重的现状,分析比较了几种泥磷处理方法的优缺点,提出了经济有利和环境友好的从泥磷中制取次磷酸钠的方法.  相似文献   

13.
A number of municipal wastewater treatment systems were developed to improve effluent water quality, however economic aspects should be considered. This study was thus carried out to investigate the application of date-palm fibers filtration as an efficient method to economically remove turbidity, phosphorus, organics in term of COD and helminth eggs of secondary domestic wastewater from an activated sludge treatment process. Column experiments were investigated to study the efficiency of date-palm fibers filters media used in this work for the removal of targeted matter under operational conditions (flow rate, filter depth, and diameter of the fibers). The results indicate that diameter of the fibers had the most significant factor affecting the removal of targeted matter. Pilot test results indicated that date-palm fibers filtration removed up to 54.9% of turbidity, 80.6% of COD, 57.7% of phosphorus and 98% of helminth eggs. Definitely, it could be concluded that the date-palm fibers could offer an appreciable economic and environmental potential, which should be in a position to effectively contribute to the valorisation of such as date-palm by-products for domestic or industrial wastewater treatment in southern of Tunisia.  相似文献   

14.
A review of thermal sludge pre-treatment processes to improve dewaterability   总被引:29,自引:0,他引:29  
As a result of the wide application and utilization of the waste activated sludge process, excess sludge presents a serious disposal problem. Many efforts have been devoted to reduce the excess sludge by treatments such as digestion and dewatering. It has been known for many years that a thermal pre-treatment gives an improvement in the dewaterability of sludges. This paper provides a literature review concerning the optimum treatment conditions to obtain enhanced dewaterability and digestibility of sludge. The main commercial hydrolysis processes (Cambi, Porteous and Zimpro) are discussed. The literature findings concerning the optimum treatment conditions of thermal or thermochemical pre-treatments are reviewed. The second part of this paper deals with the fundamentals of improving sludge dewatering. The influence of extracellular polymer (ECP) on settling and dewatering characteristics is discussed, together with the importance of cations and ECP-hydrophobicity in the flocculation and dewatering process. Finally, the effect on exocellular polymer, dewaterability, settleability and colloidal stability of activated sludge by treatment with sulfuric acid was studied.  相似文献   

15.
Total experimental period was divided into two stages. At first stage, a series of batch studies were carried out to get an understanding of the effect of ozonation on sludge properties. At the following stages, three membrane bioreactors (MBRs) with different amounts of activated sludge to be ozonated were run in parallel for a long period to evaluate the influence of sludge ozonation on sludge yield and permeate quality. Through batch study, it was found that ozone could disrupt the cell walls and cause the release of plasm from the cells, then the amounts of soluble organics in the solution increased with ozonation time. With the rise of soluble organics, the amount of soluble organics to be mineralized increased as well, which would reduce the soluble organics content. For the counteraction between these two aspects, a pseudo-balance could be achieved, and soluble organics would vary in a limited range. Sludge ozonation also increased the contents of soluble nitrogen and phosphorus in the solution. On the basis of batch study, a suitable ozone dosage of 0.16 kg O(3)/kg MLSS was determined. Three systems were run in parallel for a total period of 120 days; it was demonstrated that a part of activated sludge ozonation could reduce sludge production significantly, and biological performance of mineralization and nitrification would not be inhibited due to sludge ozonation. Experimental results proved that the combination of ozonation unit with MBR unit could achieve an excellent quality of permeate as well as a small quantity of sludge production, and economic analysis indicated that an additional ozonation operating cost for treatment of both wastewater and sludge was only 0.096 Yuan (US$ 0.0115)/m(3) wastewater.  相似文献   

16.
Biological nutrient removal (BNR) was investigated in a fixed bed sequencing batch reactor (FBSBR) in which instead of activated sludge polypropylene carriers were used. The FBSBR performance on carbon and nitrogen removal at different loading rates was significant. COD, TN, and phosphorus removal efficiencies were at range of 90-96%, 60-88%, and 76-90% respectively while these values at SBR reactor were 85-95%, 38-60%, and 20-79% respectively. These results show that the simultaneous nitrification-denitrification (SND) is significantly higher than conventional SBR reactor. The higher total phosphorus (TP) removal in FBSBR correlates with oxygen gradient in biofilm layer. The influence of fixed media on biomass production yield was assessed by monitoring the MLSS concentrations versus COD removal for both reactors and results revealed that the sludge production yield (Y(obs)) is significantly less in FBSBR reactors compared with SBR reactor. The FBSBR was more efficient in SND and phosphorus removal. Moreover, it produced less excess sludge but higher in nutrient content and stabilization ratio (less VSS/TSS ratio).  相似文献   

17.
Ultrasonic reduction of excess sludge from the activated sludge system   总被引:3,自引:0,他引:3  
Sludge treatment has long become the most challenging problem in wastewater treatment plants. Previous studies showed that ozone or chlorine effectively liquefies sludge into substrates for bio-degradation in the aeration tank, and thus reduces the excess sludge. This paper employs ultrasound to reduce the excess sludge from the sequential batch reactor (SBR) system. Partial sludge was disintegrated into dissolved substrates by ultrasound in an external sono-tank and was then returned to the SBR for bio-degradation. The results showed that ultrasound (25kHz) effectively liquefied the sludge. The most effective conditions for sludge reduction were as following: sludge sonication ratio of 3/14, ultrasound intensity of 120kW/kgDS, and sonication duration of 15min. The amount of excess sludge was reduced by 91.1% to 17.8mg/(Ld); the organic content and settleability of sludge in the SBR were not impacted. The chemical oxygen demand (COD) removal efficiency was 81.1%, the total nitrogen (TN) removal efficiency was 17-66%, and high phosphorus concentration in the effluent was observed.  相似文献   

18.
鉴于地聚合物是一种低碳排放且能源、资源消耗较少的新型胶凝材料,其制备技术倍受关注。采用热活化污泥和高钙煤系废物制备地聚合物,并与采用高钙粉煤灰和矸石制备地聚合物的反应机制与性能进行了对比分析,确定了制备污泥-高钙煤系废物地聚合物的最佳工艺参数。采用XRD、SEM、TG-DTA及FTIR等对制备的地聚合物的原料组成和性能进行了深入分析。研究表明: 经900℃焙烧45 min掺量为40%(<50 μm)热活化污泥-煤系废物制备的地聚合物具有较好的抗压强度。无定形地聚合物胶凝包裹在球状粉煤灰颗粒周围,有类沸石矿物生成,Al—O/Si—O对称伸缩峰及Si—O—Si/Si—O—Al弯曲振动峰明显。  相似文献   

19.
兰尧中  王莉红  杨宇 《功能材料》2005,36(7):1113-1115
Converter sludge, a byproduct produced on large amounts in the steel making process, is an important resource that can be utilized effectively. This paper describes an experiment in which converter sludge was tested as an adsorbent for the removal of phosphorus from waste water. It was found that the phosphorus removal depended on the amount of converter sludge added, the pH value and the contact time. Under laboratory conditions when the added sludge was 2. 0mg/100ml, the contact time 4h and the pH value of equalized 4, over 88% of phosphorus was removed; the experimental data on converter sludge adsorption of phosphorus in the water fitted the Freundlich isotherm model. Converter sludge was found to be very effective in adsorbing the phosphorus.  相似文献   

20.
This study aims at coupling of activated sludge treatment with nanofiltration to improve denim textile wastewater quality to reuse criteria. In the activated sludge reactor, the COD removal efficiency was quite high as it was 91+/-2% and 84+/-4% on the basis of total and soluble feed COD, respectively. The color removal efficiency was 75+/-10%, and around 50-70% of removed color was adsorbed on biomass or precipitated within the reactor. The high conductivity of the wastewater, as high as 8 mS/cm, did not adversely affect system performance. Although biological treatment is quite efficient, the wastewater does not meet the reuse criteria. Hence, further treatment to improve treated water quality was investigated using nanofiltration. Dead-end microfiltration (MF) with 5 microm pore size was applied to remove coarse particles before nanofiltration. The color rejection of nanofiltration was almost complete and permeate color was always lower than 10 Pt-Co. Similarly, quite high rejections were observed for COD (80-100%). Permeate conductivity was between 1.98 and 2.67 mS/cm (65% conductivity rejection). Wastewater fluxes were between 31 and 37 L/m2/h at 5.07 bars corresponding to around 45% flux declines compared to clean water fluxes. In conclusion, for denim textile wastewaters nanofiltration after biological treatment can be applied to meet reuse criteria.  相似文献   

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