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2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><strong style="font-size:14px; font-weight:bold !important; margin:0px; padding:0px">如何測(cè)定揮發(fā)性脂肪酸VFA？</strong><span style="font-size:14px; margin:0px; padding:0px">揮發(fā)性脂肪酸(VFA)是厭氧消化過(guò)程的重要中間產(chǎn)物，甲烷菌主要利用VFA形成甲烷，只有少部分甲烷由CO2和H2生成。但CO2和H2的生成也經(jīng)過(guò)高分子有機(jī)物形成VFA的中間過(guò)程。由此看來(lái)，形成甲烷的過(guò)程離不開(kāi)VFA的形成，但是VFA在厭氧反應(yīng)器中的積累能反映出甲烷菌的不活躍狀態(tài)或反應(yīng)器操作條件的惡化，較高的VFA(例如乙酸)濃度對(duì)甲烷菌有抑制作用。因此在反應(yīng)器運(yùn)行中，出水VFA的測(cè)定一般都作為重要控制指標(biāo)。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">VFA包括甲酸、乙酸、丙酸、丁酸、戊酸、己酸以及它們的異構(gòu)體。在運(yùn)轉(zhuǎn)良好的高速厭氧反應(yīng)器中，VFA中乙酸可占有很高的比例，但當(dāng)反應(yīng)器運(yùn)行狀態(tài)不好時(shí)，丙、丁酸濃度會(huì)上升。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">在VFA測(cè)定中，常進(jìn)行VFA總量測(cè)定，其單位以mmol/L或換算為按乙酸計(jì)，以單位mg/L表示。對(duì)VFA中各種低級(jí)脂肪酸（乙酸、丙酸等）的分別定量分析也是重要的，有時(shí)常需要知道以COD表示的VFA的量(即VFA以單位mgCOD/L)表示，此時(shí)也需要知道VFA中各種有機(jī)酸的含量，因?yàn)樗鼈儞Q算為COD的換算系數(shù)是不同的。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><strong style="font-size:14px; font-weight:bold !important; margin:0px; padding:0px">如何測(cè)定揮發(fā)性脂肪酸VFA？</strong><span style="font-size:14px; margin:0px; padding:0px">下面我們就來(lái)介紹一下VFA測(cè)定當(dāng)中最常用的滴定法。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><strong style="font-weight:bold !important; margin:0px; padding:0px"><span style="font-size:14px; margin:0px; padding:0px">1. 滴定法原理</span></strong></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">本法原理是將廢水以磷酸酸化后，從中蒸發(fā)出揮發(fā)性脂肪酸，再以酚酞為指示劑用NaOH溶液滴定餾出液。廢水中的氨態(tài)氮可能對(duì)測(cè)定形成干擾，因此應(yīng)當(dāng)首先在堿性條件下蒸發(fā)出氨態(tài)氮，以硼酸溶液吸收后滴定之。因此此法可用于氨態(tài)氮和VFA的聯(lián)合測(cè)定。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><strong style="font-weight:bold !important; margin:0px; padding:0px"><span style="font-size:14px; margin:0px; padding:0px">2. 藥品</span></strong></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <ul style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> <li style="margin: 0px; padding: 0px; list-style-type: none; font-size: 12px;"> <p style="margin: 0px; padding: 0px;"><span style="font-size:14px; margin:0px; padding:0px">10%NaOH溶液：</span></p> </li> <li style="margin: 0px; padding: 0px; list-style-type: none; font-size: 12px;"> <p style="margin: 0px; padding: 0px;"><span style="font-size:14px; margin:0px; padding:0px">NaOH標(biāo)準(zhǔn)溶液，0.1000 mol/L</span></p> </li> <li style="margin: 0px; padding: 0px; list-style-type: none; font-size: 12px;"> <p style="margin: 0px; padding: 0px;"><span style="font-size:14px; margin:0px; padding:0px">10%磷酸溶液，取70ml密度l.7g/cm3的磷酸用水稀釋至1L。</span></p> </li> <li style="margin: 0px; padding: 0px; list-style-type: none; font-size: 12px;"> <p style="margin: 0px; padding: 0px;"><span style="font-size:14px; margin:0px; padding:0px">酚酞指示劑，1%的乙醇溶液。</span></p> </li> </ul> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><strong style="font-weight:bold !important; margin:0px; padding:0px"><span style="font-size:14px; margin:0px; padding:0px">3. 測(cè)定步驟</span></strong></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">于蒸餾瓶中放入50～200ml待測(cè)廢水，其VFA含量不超過(guò)30mmol。如水樣體積不足100ml，可以蒸餾水稀釋至100ml。放人幾滴酚酞指示劑。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">加入10%NaOH溶液，使溶解呈堿性，并使NaOH略過(guò)量。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">開(kāi)始蒸餾，至蒸餾瓶中剩余的液體為50-60ml為止，用蒸餾水將蒸餾瓶剩余液體稀釋至原來(lái)的體積，用10毫升10%的磷酸酸化，在接收瓶中放10ml蒸餾水并使接收瓶與蒸餾瓶上的冷凝管連接，導(dǎo)人管應(yīng)浸入接收瓶的液畫(huà)以下。蒸餾至瓶中液體為15～20ml時(shí)為止。待蒸餾瓶冷卻后，加入50ml蒸餾水再次蒸餾，至剩余10~20ml液體為止。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">為了除去二氧化碳、硫化氫、二氧化硫等于擾物，可向餾出液中通人高純氮?dú)?0～15min，然后加入10滴酚酞，用NaOH標(biāo)準(zhǔn)溶液滴定至淡粉色不消失為止。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><strong style="font-weight:bold !important; margin:0px; padding:0px"><span style="font-size:14px; margin:0px; padding:0px">4. 計(jì)算</span></strong></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">揮發(fā)性脂肪酸含量計(jì)算如下</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> </p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial; text-align: center;"><span style="font-size:14px; margin:0px; padding:0px"><img alt="" src="http://m.h7502.cn/uploads/allimg/181206/1-1Q206164R4R9.jpg" style="border:0px none; margin:0px; padding:0px; vertical-align:middle" /></span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> </p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">式中：</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">VNaOH ---滴定消耗的NaOH標(biāo)準(zhǔn)溶液的體積，ml;</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> c---滴定消耗的NaOH標(biāo)準(zhǔn)溶液的準(zhǔn)確濃度，mol/L;</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> Vs---被測(cè)廢水水樣的體積，ml。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> </p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">需要注意的是，VFA指標(biāo)的時(shí)效性非常重要，采樣后應(yīng)立即測(cè)定，并根據(jù)測(cè)定結(jié)果采取相應(yīng)措施。如果采樣后第二天再測(cè)定，VFA的數(shù)據(jù)很有可能不準(zhǔn)確，并對(duì)后續(xù)厭氧反應(yīng)器的運(yùn)行造成影響。</span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px"> </span></p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"> </p> <p style="margin: 0px; padding: 0px; color: rgb(102, 102, 102); font-family: "Microsoft YaHei UI", "Microsoft YaHei", SimSun, "Segoe UI", Tahoma, Helvetica, sans-serif; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="font-size:14px; margin:0px; padding:0px">如果厭氧反應(yīng)器出水VFA超過(guò)300以上，則表示厭氧反應(yīng)器內(nèi)部的酸度過(guò)高，可能導(dǎo)致厭氧顆粒污泥發(fā)生中毒。此時(shí)，應(yīng)立即大幅減少進(jìn)水負(fù)荷（減少進(jìn)水量或者將出水都打循環(huán)進(jìn)入?yún)捬醴磻?yīng)器）。如果VFA持續(xù)上升超過(guò)500以上，應(yīng)立即采取停止進(jìn)水，并用清水或總排水打入反應(yīng)器進(jìn)行稀釋?zhuān)员M快降低反應(yīng)器揮發(fā)酸的濃度至300以下，以保證反應(yīng)器安全運(yùn)行。</span></p> </div> <div id="0u9kxhdeykzo" class="clearfix"></div> <div id="0u9kxhdeykzo" class="inside-page-news clearfix"> <ul class="clearfix"> <li> <img src="/static/index/images/sj.png">上一篇：<a href="/zhishiku/406.html"> 一個(gè)公式告訴你，如何計(jì)算厭氧污泥用量？</a> </li> <li> 下一篇：<a href="/zhishiku/408.html">【重要】厭氧污泥酸化不可不知的4大原因</a><img src="/static/index/images/sj2.png"> </li> </ul> <a href="/zhishiku/" class="fanhui">返回列表</a> </div> </div> </div> </div> </div> </div> <footer class="footer clearfix"> <div id="0u9kxhdeykzo" class="footer-top 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