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苏(Su)州(Zhou)理(Li)则(Ze)环(Huan)保(Bao)科(Ke)技(Ji)有(You)限(Xian)公(Gong)司(Si)-高(Gao)COD废(Fei)水(Shui)处(Chu)理(Li)介(Jie)绍(Shao)
化(Hua)学(Xue)需(Xu)氧(Yang)量(Liang)COD((?)ChemicalOxygenDemand)(?)是(Shi)在(Zai)一(Yi)定(Ding)的(De)条(Tiao)件(Jian)下(Xia),(?)采(Cai)用(Yong)一(Yi)定(Ding)的(De)强(Qiang)氧(Yang)化(Hua)剂(Ji)处(Chu)理(Li)水(Shui)样(Yang)时(Shi),(?)所(Suo)消(Xiao)耗(Hao)的(De)氧(Yang)化(Hua)剂(Ji)量(Liang)。(?)它(Ta)是(Shi)表(Biao)示(Shi)水(Shui)中(Zhong)还(Huan)原(Yuan)性(Xing)物(Wu)质(Zhi)多(Duo)少(Shao)的(De)一(Yi)个(Ge)指(Zhi)标(Biao)。(?)水(Shui)中(Zhong)的(De)还(Huan)原(Yuan)性(Xing)物(Wu)质(Zhi)有(You)各(Ge)种(Zhong)有(You)机(Ji)物(Wu)、(?)亚(Ya)硝(Xiao)酸(Suan)盐(Yan)、(?)硫(Liu)化(Hua)物(Wu)、(?)亚(Ya)铁(Tie)盐(Yan)等(Deng)。(?)但(Dan)主(Zhu)要(Yao)的(De)是(Shi)有(You)机(Ji)物(Wu)。(?)因(Yin)此(Ci),(?)化(Hua)学(Xue)需(Xu)氧(Yang)量(Liang)((?)COD)(?)又(You)往(Wang)往(Wang)作(Zuo)为(Wei)衡(Heng)量(Liang)水(Shui)中(Zhong)有(You)机(Ji)物(Wu)质(Zhi)含(Han)量(Liang)多(Duo)少(Shao)的(De)指(Zhi)标(Biao)。(?)化(Hua)学(Xue)需(Xu)氧(Yang)量(Liang)越(Yue)大(Da),(?)说(Shuo)明(Ming)水(Shui)体(Ti)受(Shou)有(You)机(Ji)物(Wu)的(De)污(Wu)染(Ran)越(Yue)严(Yan)重(Zhong)。(?)化(Hua)学(Xue)需(Xu)氧(Yang)量(Liang)((?)COD)(?)的(De)测(Ce)定(Ding),(?)随(Sui)着(Zhuo)测(Ce)定(Ding)水(Shui)样(Yang)中(Zhong)还(Huan)原(Yuan)性(Xing)物(Wu)质(Zhi)以(Yi)及(Ji)测(Ce)定(Ding)方(Fang)法(Fa)的(De)不(Bu)同(Tong),(?)其(Qi)测(Ce)定(Ding)值(Zhi)也(Ye)有(You)不(Bu)同(Tong)。(?)