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1.
采用OXITop测定仪对造纸废水中BOD5进行测定,根据测定结果,对BODi/BOD5与测定时间的关系进行曲线拟合研究,确定造纸废水中BOD5快速测定方法。  相似文献   

2.
测压法BOD5测定的探讨   总被引:2,自引:0,他引:2  
对BOD5的测压法测定做了较全面的探讨.指出该法经不同倍数稀释的测定值之间的差异,验证了该测定法可以表征毒性物质对微生物活性的抑制程度.通过模拟含毒性染料的印染废水活性污泥的处理,指出其不同稀释比的BOD5值可作为该处理法的设计和运行管理的重要参数.  相似文献   

3.
利用废铁屑微电解-活性污泥法工艺对纺织印染废水进行处理。该工艺处理印染废水效果好、投资少,色度、BOD5和CODcr除去率分别达到94%、90%和92%以上,处理后的水质达到GB4287—92纺织印染工业废水排放的一级标准。  相似文献   

4.
Fenton试剂-石灰法处理土霉素废水实验研究   总被引:2,自引:0,他引:2  
本文首次采用Fenton试剂—石灰法处理土霉素废水?结果表明,在适宜条件下对不同浓度的废水进行处理,CODCr去除率可达71%以上,废水的可生化性(BOD5/CODCr)由0.1提高到0.4以上;实验还对土霉素纯品进行处理,通过对处理前后的UV—Vis光谱分析证实了彻底去除土霉素是废水可生化性提高的主要原因。  相似文献   

5.
BOD5是保证水体自净的指标之一,也是研究废水可生化降解和生化处理工艺设计和动力学的重要参数。本文通过对比实验,对BOD5的测定方法进行研究,探索用氧电极法测定BOD5的可能性和可行性,对其不足之处提出相应的解决措施,使之能更适用于科研、监测教学等方面的需要。  相似文献   

6.
探讨生物处理净化出水的BOD5测定了硝化作用产生的干扰问题,验证氨氮硝化的耗氧量对BOD5测定结果的影响,为得到BOD5的准确结果,可以在生物处理净化后的水样中加入ATU,消除干扰。  相似文献   

7.
选取吸附法为处理方法,以锯末为吸附剂,用氢氧化钾溶液加以活化,一定条件下对含镉废水进行处理,用结晶紫分光光度法测定溶液中镉的含量,分析含镉废水中镉的去除率,以研究锯末吸附镉的最佳实验条件.实验证明:改性锯末对低浓度的含镉废水有较好的处理效果,最佳反应温度为30℃,最佳反应时间为100min.  相似文献   

8.
1前言 化学需氧量(简称COD)在环境监测中是评介地表水质量与废水排放是否符合排放标准的非常重要指标,是指水体中易被强氧化剂重铬酸钾氧化的还原性物质所消耗的氧化剂的量,以氧的mg/L来表示。由于水体受有机污染很普遍,因此,化学需氧量一般反映水体受有机物污染的程度。水和废水中化学需氧量测定基本分为重铬酸钾法和仪器法,两者都先经过加热消解处理,重铬酸钾法使用硫酸亚铁铵进行滴定测量,仪器法一般使用光度分析法进行测量(也可进行滴定操作)。  相似文献   

9.
采用水解酸化 双层接触氧化法 气浮处理织染废水。当CODcr及BOD5的浓度为 15 0 0mg/L和6 0 0mg/L时 ,CODcr及BOD5的去处率分别达到 80 %和 90 %以上 ,出水水质达到国家废水综合排放 (GB8978- 96 )二级标准 ,处理费用为 0 .5 6元 /m3 ,该工艺具有节能 ,运行维护费用低 ,操作简便等优点  相似文献   

10.
某啤酒厂年产啤酒20万KL废水排放量为3140m^2/d,根据实测,其污染物COD、BOD5处理前浓度分别为1580mg/L、453mg/L。啤酒厂生产废水中含有大量的COD、BOD5等有机物。  相似文献   

11.
Of 6634 registered industries in Pakistan, 1228 are considered to be highly polluting. The major industries include textile, pharmaceutical, chemicals (organic and inorganic), food industries, ceramics, steel, oil mills and leather tanning which spread all over four provinces, with the larger number located in Sindh and Punjab, with smaller number in North Western Frontier Province (NWFP) and Baluchistan. Hattar Industrial Estate extending over 700 acres located in Haripur district of NWFP is a new industrial estate, which has been developed with proper planning for management of industrial effluents. The major industries located in Hattar are ghee industry, chemical (sulfuric acid, synthetic fiber) industry, textile industry and pharmaceuticals industry. These industries, although developed with proper planning are discharging their effluents in the nearby natural drains and ulti- mately collected in a big drain near Wah. The farmers in the vicinity are using these effluents for growing vegetables and cereal crops due to shortage of water. In view of this discussion, there is a dire need to determine if these effluents are hazardous for soil and plant growth. So, effluents from different industries, sewage and normal tap water samples were collected and analysed for pH electrical conductivity (EC), total soluble salts (TSS), biological oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen, cations and anions and heavy metals. The effluents ofghee and textile industries are highly alkaline. EC and TSS loads of ghee and textile industries are also above the National Environmental Quality Standards (NEQS), Pakistan. All the effluents had residual sodium carbonates (RSCs), carbonates and bicarbonates in amounts that cannot be used for irrigation. Total toxic metals load in all the effluents is also above the limit i.e. 2,0 mg/L. Copper in effluents of textile and sewage, manganese in ghee industry effluents and iron contents in all the effluents were higher than NEQS. BOD and COD values of all the industries are also above the NEQS. On the whole, these effluents cannot be used for irrigation without proper treatment otherwise that may cause toxicity to soil, plants and animals as well add to the problems of salinity and sododicity. Similarly, these effluents cannot be used for fish farming.  相似文献   

12.
通过对沙河周-漯段河水水质的化学需氧量、5日生化需氧量、氨氮、总磷、高锰酸盐指数、溶解氧、氟化物、氯化物8个参数在2004年1月-2006年5月的监测和研究,总结了近几年沙河水质的变化规律,并比较了不同断面的水质,找出了颖河汇入沙河时对沙河水质的影响.  相似文献   

13.
复合微生物菌剂在海水养殖废水中的修复作用   总被引:1,自引:0,他引:1  
采用直接投加复合微生物菌剂原位修复实际养殖废水,去除水体中的有机物、氮和磷等污染物,分析微生物处理对水体CODCr、BOD5、溶解氧含量、透明度变化的影响.结果表明:采用微生物技术修复养殖系统水环境具有显著效果,试验期间透明度范围适宜水产养殖,水体中CODCr降低了61.2%,BOD5降低了53.3%,而溶解氧有所上升,总氮降低38.1%,总磷降低27.4%,底泥中的总氮和总磷变化不大.  相似文献   

14.
本文简要介绍了BOD_5与COD内在关系的机理,并采用线性回归方法对茂名市小东江水质中BOD_5与CODcr之间的相关性进行研究,进而建立了相关方程,结果表明BOD_5与CODcr之间有良好的相关性。  相似文献   

15.
张敏 《南平师专学报》2005,24(4):44-45,27
根据对武夷学院校区黄泥垅水库7个监测点的水质监测结果,对武夷学院校区地表水环境质量进行评价.结果表明,武夷学院校区地表水水质CODcr、BOD5、NH3-N等指标均超过地表水环境质量Ⅲ类标准.  相似文献   

16.
通过对校园内不同下垫面雨水径流进行水质监测分析,数据显示初期雨水径流污染物浓度较高,随着降雨持续,其浓度下降并趋于平稳。结果表明,校园屋面雨水径流水质较校园道路好,雨水径流中pH、电导率、BODs、溶解氧、总余氯、氨氮、TP、度及嗅和味等指标均符合”城市杂用水标准”要求,而SS、TN、浊度等指标含量较高,超过该标准要求。  相似文献   

17.
Research in Science Education - The purpose of this study was to investigate the effect of the case-based learning (CBL) method used in “biochemical oxygen demand (BOD),” which is a...  相似文献   

18.
By combining sequencing batch reactor (SBR) activated sludge process and constructed wetland (CW), this study is to achieve the domestic wastewater treatment. Our purpose was to determine the optimum operating parameters of the combined process. The process involved advantages and shortages of SBR and CW. Under normal temperature, the 3rd cycle (SBR’s operation cycle is 8 h: inflow for 1 h, limited aeration for 3 h, sediment for 1 h, outflow for 1 h, and idling for 2 h; CW’s hydraulic retention time (HRT) is 24.8 h and hydraulic loading is 24.5 m^3/m^2 d) was the best cyclic mode. The effluents can meet the standard GB/T18921-2002: “The reuse of urban recycling water: water quality standard for scenic environment use”. In the 3rd cycle, the efficiency of CW was the maximum, and energy consumption of SBR was the minimum. Under the condition of low dissolved oxygen, the removing efficiency of chemical oxygen demand (COD) and ammonia was not affected obviously. Simultaneously, nitrification and denitrification phenomena occured and phosphorus was absorbed obviously.  相似文献   

19.
氨氮废水处理过程中的好氧反硝化研究   总被引:7,自引:0,他引:7  
采用序批式反应器处理氨氮废水,试验结果验证了好氧反硝化的存在,好氧反硝化脱氮能力随混合液溶解氧浓度的提高而降低,当溶解氧浓度为0.5mg/L时,总氮去除率可达到66.0%。并结合理论分析,对好氧反硝化的机理进行了探讨。  相似文献   

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