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</form> </div> </div> </div>  <div id="wog2omo" class="ly_crumb"> <img src="/skins/257424/images/home.png"> <p>當前位置：<a href="/">首頁(yè)</a> > <a href="/article.html">技術(shù)文章</a> > <span>分析水中cod超標的兩個(gè)原因</span></p> </div>   <div id="c2cyamu" class="ly_NyNewsdetail"> <h1 class="NyNewsdetail_title">分析水中cod超標的兩個(gè)原因</h1> <div id="y4kma0g" class="NyNewsdetail_tips">更新時(shí)間：2022-11-09 點(diǎn)擊次數：1214</div> <div id="22os2mi" class="NyNewsdetail_con" id="c_detail_wrap"> <div>　　COD作為水處理的重要指標之一，其數值反應了水中還原性物質(zhì)污染的程度，若含量過(guò)高，水中消耗溶解氧就越多，水缺氧會(huì )造成水中大量動(dòng)植物因缺氧而死亡，同時(shí)使厭氧菌大量繁殖令水質(zhì)惡化，一旦發(fā)生COD超標情況，可能危及企業(yè)正常運轉，所以控制COD值，首先要找出超標的原因。</div><div>　　1、</div><div>　　企業(yè)生產(chǎn)過(guò)程中cod的產(chǎn)生是必然的，如食品廠(chǎng)中多余食物的殘留與水體、化工廠(chǎng)中還原性物質(zhì)S離子和氯離子等及電鍍廢水在酸洗過(guò)程中都是污水COD超標原因，這種屬于自身生產(chǎn)原因。</div><div>　　2、</div><div>　　生化處理溫度過(guò)低時(shí)，菌種的活性也跟著(zhù)低，從而降低對cod的分解；當水中溶解氧不足以滿(mǎn)足菌種自身代謝，會(huì )造成菌種乏性，同樣污水cod處理效率大大降低。廢水中氨氮、重金屬濃度過(guò)高會(huì )毒害生化池中的菌種，使cod降解不下來(lái)。這幾種情況屬于水處理工藝缺陷。</div><div>　　COD越高，說(shuō)明水體受有機物的污染越嚴重。有毒的有機物進(jìn)入水體，可能經(jīng)過(guò)食物鏈的傳播，最后進(jìn)入人體，引起慢性中毒。如滴滴涕的慢性中毒能影響神經(jīng)系統，破壞肝功能，造成生理障礙，甚至可能影響生殖和遺傳，產(chǎn)生畸胎和引起癌癥等。</div><div>　　cod分析儀是利用密封催化消解，然后進(jìn)行比色法測量。cod分析儀采用先進(jìn)的冷光源、窄帶干涉技術(shù)及微電腦自動(dòng)處理數據，直接顯示樣品的COD（mg/L）值。該cod分析儀廣泛適用于環(huán)境監測、污水處理及大專(zhuān)院校、科研單位等部門(mén)。</div> </div> <div id="2mkaqm2" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/jsshengaohua-Article-3191306/">COD對水質(zhì)和生態(tài)環(huán)境的影響有哪些？</a></li> <li>下一篇：<a href="/jsshengaohua-Article-3180031/">簡(jiǎn)單介紹便攜式cod測定儀的校正原則</a></li> </ul> </div> </div>   <div id="sqgmqqm" class="foot_box"> <div id="keiko2g" class="footCon"> <div id="emoqkmk" class="foot_t w1300"> <div id="4goqeom" class="foot_lv"> <div id="woiicq2" class="foot_logo"><img src="/skins/257424/images/foot_logo.png" /></div> <div id="ycgkyoo" class="foot_nav"> <ul> <li><a href="/">首頁(yè)</a></li> <li><a href="/products.html">產(chǎn)品中心</a></li> <li><a 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