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二次供水是指单位或个人将城市公共供水或自建设施供水经储存、加压，通过管道再供用户或自用的形式，因此，二次供水是高层供水的方式。 二次供水设备通常分：水箱变频设备，无负压变频设备。二次供水是物业要求各小区、办公楼都进行二次供水水质检测，向相关部门提供二次供水检测报告检测项目21项：理化指标17项，包括：硝酸盐、亚硝酸盐、色度、浑浊度、臭和味、肉眼可见物、PH值、铁、锰、铜、铅、氯化物、硫酸盐、总硬度、耗氧量、挥发酚类、氨氮微生物指标4项：包括总大肠菌群、耐热大肠菌群、大肠埃希氏菌、菌落总数一般通州要求测31-33项二次供水检测项目，其他区在21或22项即可检测数量： 正常是有几套无负压设备或水箱测几套ABSolute;top:0;border:0;width:undefinedpx;height:undefinedpx;" SANdbox="allow-forms allow-popUPS allow-popups-to-escape-sandbox allow-same-origin allow-scripts allow-top-navigation-by-user-activation" frameborder="0" src="https://googleads.g.doubleclick.net/pagead/ads?guci=2.2.0.0.2.2.0.0&client=ca-pub-6745515041074118&ouTPUt=html&adk=1812271804&adf=3279755396&plat=1%3A32776%2C2%3A32776%2C8%3A134217728%2C9%3A134250504%2C10%3A32%2C11%3A32%2C16%3A8388608%2C17%3A32%2C24%3A32%2C25%3A32%2C30%3A1081344%2C32%3A32%2C40%3A32&format=0x0&url=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fact%3D1&ea=0&flash=0&pra=5&wgl=1&tt_state=W3siaXNzdWVyT3JpZ2luIjoiaHR0cHM6Ly9hZHNlcnZpY2UuZ29vZ2xlLmNvbSISInN0YXRlIjowfSx7Imlzc3Vlck9yaWdpbiI6Imh0dHBzOi8vYXR0ZXN0YXRpb24uYW5kcm9pZC5jb20iLCJzdGF0ZSI6MH1d&dt=1608259201756&bpp=5&bdt=136&idt=70&shv=r20201203&cbv=r20190131&ptt=9&saldr=aa&cookie=ID%3D185cbb81782dad56-229119323ac50048%3AT%3D1608258946%3ART%3D1608258946%3AS%3DALNI_MYfuc0nVvKKTrjs90X08bJp77FHSg&nras=1&correlator=7427764712737&frm=23&ife=1&pv=1&ga_vid=222195036.1608259202&ga_sid=1608259202&ga_hid=663885477&ga_fc=0&nhd=1&u_tz=480&u_his=17&u_java=0&u_h=768&u_w=1366&u_ah=728&u_aw=1366&u_cd=24&u_nplug=3&u_nmime=4&adx=-12245933&ady=-12245933&biw=1349&bih=657&isw=730&ish=360&ifk=2699508910&scr_x=0&scr_y=0&eid=21066923%2C21067981&oid=3&pvsid=2002157102152225&pem=204&ref=https%3A%2F%2Fwww.bizrobot.com%2Fcompany_bloginfo.php%3Fadd_suc%3D1&rx=0&eae=2&fc=1920&brdim=0%2C0%2C0%2C0%2C1366%2C0%2C1366%2C728%2C730%2C360&vis=1&rsz=%7C%7Cs%7C&abl=NS&fu=8204&bc=31&ifi=0&uci=0.gkmz8tcwelg4&fsb=1&dtd=87" marginwidth="0" marginheight="0" vspace="0" hspace="0" allowtransparency="true" scrolling="no" allowfullscreen="true" data-google-container-id="0.gkmz8tcwelg4" data-load-complete="true"> |