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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="87h44hp" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產品關鍵詞：</span>開封氨氮降解菌種哪個牌子好,氨氮</p><p><span>***更新：</span>2021-01-10 09:13:27</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="hqoyquf" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">普羅生物技術（上海）有限公司</a></p><p><span>聯(lián)系人：</span>楊明浩</p><p><span>郵箱: </span>yminghao@bhnchina.com</p><p><span>電話: </span>18221034638</p><p><span>傳真: </span>021_68917228</p><p><span>網址: </span>https://www.probiotic.com.cn</p><p><span>手機: </span>021-68917101</p><p><span>地址: </span>上海市浦東新區(qū)金港路211號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="3og444v" class="page-proshow02"><p class="title">詳細說明</p><div id="d4t7494" class="box"><p><p style="text-indent:25px">高濃度氨氮廢水簡介：氨氮是指水中以游離氨（NH3）和銨離子（NH4+）形式存在的氮。氨氮是水體中的營養(yǎng)素，可導致水富營養(yǎng)化現(xiàn)象產生，是水體中的主要耗氧污染物，對魚類及某些水生生物有有害。水中的氨氮可以在一定條件下轉化成亞硝酸鹽，開封氨氮降解菌種哪個牌子好，如果長期飲用，水中的亞硝酸鹽將和蛋白質結合形成亞硝胺，這是一種強致病物質，對人體健康極為不利。高濃度氨氮廢水主要來源于鋼鐵、煉油、化肥、無機化工、鐵合金、玻璃制造、肉類加工和飼料生產等工業(yè)生產過程。有些工業(yè)廢水如皮革加工等新鮮廢水中氨氮初始哈按量并不高，開封氨氮降解菌種哪個牌子好，但由于廢水中有機氮的脫氨基反應致使氨氮升高。目前常用的是氨氣敏電極法和納氏試劑比色法，開封氨氮降解菌種哪個牌子好。實現(xiàn)短程硝化反硝化生物脫氮技術的關鍵就是將硝化控制在亞硝酸階段，阻止亞硝酸鹽的進一步氧化。開封氨氮降解菌種哪個牌子好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="開封氨氮降解菌種哪個牌子好,氨氮" src="https://tyunfile.71360.com/UploadFile/shplsw/637379562560849610/7933327.png"></div><p style="text-indent:25px">水樣的測定：（1）分取適量經絮凝沉淀預處理后的水樣（使氨氮含量不超過0.1mg），加入50ml比色管中，稀釋至標線，加1.0ml酒石酸鉀鈉溶液。（2）分取適量經蒸餾預處理后的餾出液，加入50ml比色管中，加一定量1mol/L氫氧化鈉溶液以中和硼酸，稀釋至標線。加1.5ml納氏試劑，混勻。放置10min后，同校準曲線步驟測量吸光度。 3.空白試驗：以無氨水代替水樣，作全程序空白測定。計算：由水樣測得的吸光度減去空白試驗的吸光度后，從校準曲線上查得氨氮含量（mg）。氨氮（N，mg/L）=m/V×1000 式中，m—由校準曲線查得的氨氮量（mg）； V—水樣體積（ml）。開封氨氮降解菌種哪個牌子好氨氮是水體中的營養(yǎng)素，可導致水富營養(yǎng)化現(xiàn)象產生。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="開封氨氮降解菌種哪個牌子好,氨氮" src="https://tyunfile.71360.com/UploadFile/shplsw/637379562151503907/6108708.png"></div><p style="text-indent:25px">全程自養(yǎng)脫氮的全過程實在一個反應器中完成，其機理尚不清楚。Hippen等人發(fā)現(xiàn)在限制溶解氧（DO濃度為0.8·1.0mg/l）和不加有機碳源的情況下，有超過60%的氨氮轉化成N2而得以去除。同時Helmer等通過實驗證明在低DO濃度下，細菌以亞硝酸根離子為電子受體，以銨根離子為電子供體，好終產物為氮氣。有實驗用熒光原位雜交技術監(jiān)測全程自養(yǎng)脫氮反應器中的微生物，發(fā)現(xiàn)在反應器處于穩(wěn)定階段時即使在限制曝氣的情況下，反應器中任然存在有活性的厭氧氨氧化菌，不存在硝化菌。有85%的氨氮轉化為氮氣。鑒于以上理論，全程自養(yǎng)脫氮可能包括兩步靠前是將部分氨氮氧化為煙硝酸鹽，第二是厭氧氨氧化。</p><p style="text-indent:25px">氨氮超標的處理方法：改善污泥負荷與污泥齡污水中的生物硝化反應屬低負荷工藝，負荷越低，硝化進行得越充分，NH3-N向NO3--N轉化的效率就越高。F/M一般在0.05～0.15kgBOD/kgMLVSS·d。負荷越低，硝化進行得越充分，NH3-N向NO3--N轉化的效率就越高。與低負荷相對應，生物硝化系統(tǒng)的SRT一般較長，因為硝化細菌世代周期較長，若生物系統(tǒng)的污泥停留時間過短，即SRT過短，污泥濃度較低時，硝化細菌就培養(yǎng)不起來，也就得不到硝化效果。SRT控制在多少，取決于溫度等因素。對于以脫氮為主要目的生物系統(tǒng)，通常SRT可取11～23d。氨氮是指水中以游離氨（NH3）和銨離子（NH4+）形式存在的氮。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="開封氨氮降解菌種哪個牌子好,氨氮" src="https://tyunfile.71360.com/UploadFile/shplsw/637379562414062500/8090165.png"></div><p style="text-indent:25px">水樣預處理：水樣帶色或渾濁以及含其它一些干擾物質，影響氨氮的測定。為此，在分析時需做適當?shù)念A處理。對較清潔的水，可采用絮凝沉淀法，對污染嚴重的水或工業(yè)廢水，則以蒸餾法使之消除干擾。絮凝沉淀法概述：加適量的硫酸鋅于水樣中，并加氫氧化鈉使呈堿性，生成氫氧化鋅沉淀，再經過濾去除顏色和渾濁等。儀器 100ml具塞量筒或比色管。試劑：（1）10%（m/V）硫酸鋅溶液：稱取10g硫酸鋅溶于水，稀釋至100ml。（2）25%氫氧化鈉溶液：稱取25g氫氧化鈉溶于水，稀釋至100ml,貯于聚乙烯瓶中。（3）硫酸ρ=1.84。城市污水、中低氨氮濃度工業(yè)廢水中氨氮的去除，由于生物法因工藝簡單。烏魯木齊氨氮降解菌種哪家好</p><p style="text-indent:25px">加適量的硫酸鋅于水樣中，并加氫氧化鈉使呈堿性，生成氫氧化鋅沉淀，再經過濾去除顏色和渾濁等。開封氨氮降解菌種哪個牌子好</p><p style="text-indent:25px">氨氮：氨氮是指水中以游離氨（NH3）和銨離子（NH4+）形式存在的氮。動物性有機物的含氮量一般較植物性有機物為高。同時，人畜糞便中含氮有機物很不穩(wěn)定，容易分解成氨。因此，水中氨氮含量增高時指以氨或銨離子形式存在的化合氮。自然地表水體和地下水體中主要以硝酸鹽氮（NO3）為主，以游離氨（NH3）和銨離子（NH4+）形式存在的氮受污染水體的氨氮叫水合氨，也稱非離子氨。非離子氨是引起水生生物有害的主要因子，而銨離子相對基本無毒。國家標準Ⅲ類地面水，非離子氨氮的濃度≤1毫克/升。氨氮是水體中的營養(yǎng)素，可導致水富營養(yǎng)化現(xiàn)象產生，是水體中的主要耗氧污染物，對魚類及某些水生生物有有害。開封氨氮降解菌種哪個牌子好</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2786086.html</p></div></div></div></div></div><div id="7obrlje" class="page-right twoColRt"><div id="oxlac3p" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="38dt3kr" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" 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