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奔跑的鱼肝油

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The purpose of this study are: detecting my school (new Long Campus) whether the microbial contamination of water, on which the micro-organisms to select the appropriate culture conditions and determination, and a parallel experiment averaged to determine the extent of contaminated tap water. Method: Yancheng Teachers College (New Long Campus) tap water samples within the sample to the sampling location, sampling method, sample treatment before sampling was distinguished; according to GB 4789.2-2010, GB 4789.3-2010 method of testing, according to GB 5749 -2006 "drinking water health standards " as the criterion of the test results. Colony count and coliform bacteria that is considered one of unqualified failure. Another: To enrich the content and increase the detection of the practical significance of this experiment, testing the tap water samples of mold, yeast infection levels, PH, smell and taste, residual chlorine concentration. Results: 30 bottles of water were detected, with a pass rate of 90%. Test results show that rarely clean tap water when most microorganisms; little boiling water microorganisms; tap water after disinfection taken correctly, with a little micro-organisms. Conclusion: The need to boil water to drink the best, always clean up the tap to prevent microbial growth and metal rust. Key words: water, microbial indicators, microbiological testing, microbiological analysis

水样超标英文

259 评论(14)

吧啦左耳

COD:化学需氧量。英文全称:Chemical Oxygen DemandCOD是指化学方法测量水样中需要被氧化的还原性物质的量。废水、废水处理厂出水和受污染的水中,能被强氧化剂氧化的物质(一般为有机物)的氧当量。在河流污染和工业废水性质的研究以及废水处理厂的运行管理中,它是一个重要的而且能较快测定的有机物污染参数。BOD:生化需氧量。英文全称:Biochemical Oxygen DemandBOD是指生化需氧量或生化耗氧量(一般指五日生化学需氧量),表示水中有机物等需氧污染物质含量的一个综合指标。说明水中有机物由于微生物的生化作用进行氧化分解,使之无机化或气体化时所消耗水中溶解氧的总数量。SS:悬浮物。英文全称:Suspended SolidsSS是指悬浮在水中的固体物质,包括不溶于水中的无机物、有机物及泥砂、黏土、微生物等。水中悬浮物含量是衡量水污染程度的指标之一。TN:总氮量。英文全称:Total NitrogenTN是指水中各种形态无机和有机氮的总量。包括NO3-、NO2-和NH4+等无机氮和蛋白质、氨基酸和有机胺等有机氮,以每升水含氮毫克数计算。常被用来表示水体受营养物质污染的程度。TP:总磷量。英文全称:Total PhosphorusTP是指水样经消解后将各种形态的磷转变成正磷酸盐后测定的结果,以每升水样含磷毫克数计量。TDS:溶解性总固体。英文全称:Total Dissloved SolidsTDS又称溶解性固体总量,测量单位为毫克/升(mg/L),它表明1升水中溶有多少毫克溶解性固体。TDS值越高,表示水中含有的溶解物越多。 总溶解固体指水中全部溶质的总量,包括无机物和有机物两者的含量。

107 评论(8)

上海大徐

COD是英文Chemical Oxygen Demand的缩写,COD的中文意思是化学需氧量。所谓化学需氧量(COD),是在一定的条件下,采用一定的强氧化剂处理水样时,所消耗的氧化剂量。它是表示水中还原性物质多少的一个指标。水中的还原性物质有各种有机物、亚硝酸盐、硫化物、亚铁盐等。但主要的是有机物。因此,化学需氧量(COD)又往往作为衡量水中有机物质含量多少的指标。化学需氧量越大,说明水体受有机物的污染越严重。 化学需氧量(COD)的测定,随着测定水样中还原性物质以及测定方法的不同,其测定值也有不同。目前应用最普遍的是酸性高锰酸钾氧化法与重铬酸钾氧化法。高锰酸钾(KmnO4)法,氧化率较低,但比较简便,在测定水样中有机物含量的相对比较值时,可以采用。重铬酸钾(K­2Cr2O7)法,氧化率高,再现性好,适用于测定水样中有机物的总量。 有机物对工业水系统的危害很大。含有大量的有机物的水在通过除盐系统时会污染离子交换树脂,特别容易污染阴离子交换树脂,使树脂交换能力降低。有机物在经过预处理时(混凝、澄清和过滤),约可减少50%,但在除盐系统中无法除去,故常通过补给水带入锅炉,使炉水pH值降低。有时有机物还可能带入蒸汽系统和凝结水中,使pH降低,造成系统腐蚀。在循环水系统中有机物含量高会促进微生物繁殖。因此,不管对除盐、炉水或循环水系统,COD都是越低越好,但并没有统一的限制指标。在循环冷却水系统中COD(DmnO4法)>5mg/L时,水质已开始变差。

151 评论(13)

微笑面对一

【摘要】:本实验的目的是:检测我校(新长校区)自来水是否被微生物污染,对其中的微生物选择适当的培养条件和测定方法,并做平行实验取平均值,以确定自来水被污染的程度。方法:通过对盐城师范学院(新长校区)范围内的自来水采样,样品以采样地点、采样方法、样品采样前被处理方法区分;依据GB 4789.2—2010、GB 4789.3—2010方法检验,按照GB 5749—2006《生活饮用水卫生标准》作为检验结果的判定依据。菌落总数和大肠菌群其中一项不合格即认为不合格。另:为丰富检测内容和增加本实验实际意义,检测了自来水水样的霉菌、酵母的感染程度、PH、臭和味、余氯浓度等。结果:共检测水样30瓶,合格率90%。检测结果表明,不常清理水龙头,取水时微生物最多;烧开的自来水微生物几乎没有;水龙头消毒后正确采水时,有微量微生物。结论:自来水需要烧开再饮用最好,水龙头要常常清理,可防止微生物滋生和金属生锈。【关键词】:自来水, 微生物指标 ,微生物检测, 微生物分析【Abstrac】t: The purpose of this study are: detecting my school (new Long Campus) whether the microbial contamination of water, on which the micro-organisms to select the appropriate culture conditions and determination, and a parallel experiment averaged to determine the water contamination level. Method: Yancheng Teachers College (New Long Campus) tap water samples within the sample to the sampling location, sampling method, sample treatment before sampling was distinguished; according to GB 4789.2-2010, GB 4789.3-2010 method of testing, according to GB 5749 -2006 "drinking water health standards" as the criterion of the test results. Colony count and coliform bacteria that is considered one of unqualified failure. Another: To enrich the content and increase the detection of the actual significance of this experiment, testing the tap water samples of mold, yeast infection levels, PH, smell and taste, residual chlorine concentration. Results: 30 bottles of water were detected, with a pass rate of 90%. Test results show that rarely clean tap water when most microorganisms; little boiling water microorganisms; tap water after disinfection taken correctly, with a little micro-organisms. Conclusion: The need to boil water to drink the best, always clean up the tap to prevent microbial growth and metal rust.【Key words】: water, microbial indicators, microbiological testing, microbiological analysis

248 评论(13)

黄黄的树

你好,我是新疆污水处理厂上班,里加一下我的微信可以吗也得微信号码

278 评论(12)

小茉莉0906

1、CODCr:化学需氧量,是以化学方法测量水样中需要被氧化的还原性物质的量。水样在一定条件下,以氧化1升水样中还原性物质所消耗的氧化剂的量为指标,折算成每升水样全部被氧化后,需要的氧的毫克数,以mg/L表示。它反映了水中受还原性物质污染的程度。

2、BOD5:5日生物需氧量,是指在一定期间内,微生物分解一定体积水中的某些可被氧化物质,特别是有机物质,所消耗的溶解氧的数量。以毫克/升或百分率、ppm表示。它是反映水中有机污染物含量的一个综合指标。BOD越高,水中有机污染物越多,水质污染越严重。

3、SS:悬浮物,指悬浮在水中的固体物质,包括不溶于水中的无机物、有机物及泥砂、黏土、微生物等。水中悬浮物含量是衡量水污染程度的指标之一。数值越高,水质污染越严重。

4、TN:总氮,是水中各种形态无机和有机氮的总量。包括NO3-、NO2-和NH4+等无机氮和蛋白质、氨基酸和有机胺等有机氮,以每升水含氮毫克数计算。常被用来表示水体受营养物质污染的程度。数值越高,水质污染越严重。

5、TP:总磷,废水中以无机态和有机态存在的磷的总和。是衡量水污染程度的指标之一,数值越大,水质污染程度越高。

6、TDS:溶解性总固体,指水中溶解组分的总量,包括溶解于水中的各种离子、分子、化合物的总量,但不包括悬浮物和溶解气体。TDS值代表了水中溶解物杂质含量,TDS值越大,说明水中的杂质含量大,水质污染越严重。

354 评论(8)

一森有你

【摘要】:本实验的目的是:检测我校(新长校区)自来水是否被微生物污染,对其中的微生物选择适当的培养条件和测定方法,并做平行实验取平均值,以确定自来水被污染的程度。方法:通过对盐城师范学院(新长校区)范围内的自来水采样,样品以采样地点、采样方法、样品采样前被处理方法区分;依据GB 4789.2—2010、GB 4789.3—2010方法检验,按照GB 5749—2006《生活饮用水卫生标准》作为检验结果的判定依据。菌落总数和大肠菌群其中一项不合格即认为不合格。另:为丰富检测内容和增加本实验实际意义,检测了自来水水样的霉菌、酵母的感染程度、PH、臭和味、余氯浓度等。结果:共检测水样30瓶,合格率90%。检测结果表明,不常清理水龙头,取水时微生物最多;烧开的自来水微生物几乎没有;水龙头消毒后正确采水时,有微量微生物。结论:自来水需要烧开再饮用最好,水龙头要常常清理,可防止微生物滋生和金属生锈[abstract] : the aim of this study was to test our new long: (whether campus) tap water by microbial pollution, the microbial choice of appropriate cultivation condition and determination method, and doing parallel experiment take average, to determine the extent of tap water polluted. Methods: through the yancheng teachers college (new long campus) within the scope of the tap water sampling, sample by sampling locations, sampling method, sampling before treatment methods distinction; According to GB 4789.2-2010, GB 4789.3-2010 method inspection, according to GB 5749-2006 "the living and drinking water hygiene standards as the inspection results determine basis. Colonies aggregates and one coliforms unqualified i. unqualified. Another: for the rich content and increase the experiment test practical significance, and tested the tap water samples of mold, the yeast infection degree, PH, smelly and taste, surplus chlorine density, etc. Results: a total of testing water bottle, percent of pass 90% 30. Test results indicate that doesn't often clean tap water; most microorganisms, Boiling water microbial almost no; Faucet after disinfection correctly when collecting water trace microorganisms. Conclusion: tap water need to boil again, faucet will often drinkable best cleaning, can prevent microbial growth and metal rust

357 评论(12)

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