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Study on Preoxidation Applied for Drinking Water Treatment in Tianjin

Author: WangFuLin
Tutor: WangXiaoChang
School: Xi'an University of Architecture and Technology
Course: Municipal Engineering
Keywords: Pre-oxidation Potassium permanganate Chlorine Ozone
CLC: TU991
Type: Master's thesis
Year: 2004
Downloads: 281
Quote: 6
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Abstract


China 's northern city of more than 70% of the water , surface water, serious organic pollution , algal blooms , zooplankton breeding , conventional treatment process is unable to meet the needs of the supply of safe drinking water . Therefore , the water supply industry is an urgent need for advanced , efficient drinking water safety and security technology . The Tianjin water quality has obvious seasonal changes , excessive pollution indicators sudden excessive and high algae period Eutroprophication characteristic index characteristics , typical and representative in the northern region . Papers for different water source of drinking water in Tianjin period , pre-oxidation technology to strengthen the conventional process , in order to improve the removal of organic matter , to protect water quality . The thesis of potassium permanganate , chlorine , ozone pre- oxidation effect and the treatment effect of the subsequent flotation , filtration , and conventional process , the experimental results show that the water quality of the pre-oxidation can improve the follow-up process . Summer high algae -term water quality potassium permanganate oxidation of organics removal , and can improve the water quality of the follow-up process ; significant pre-chlorination removing algae , but the water quality of the follow-up process by the obvious impact of algae quantity pre chloride only in the the high algal period to improve the follow-up to the conventional treatment process effluent quality ; winter low temperature and low turbidity preozonation Although we can not reduce the concentration of organic matter in the water , but it can significantly improve the water quality of the subsequent conventional processing unit . The comparative analysis of potassium permanganate , chlorine and ozone three oxidants results show that the three oxidants could improve coagulation effect , but potassium permanganate oxidation and pre- ozonation improve air flotation and filtration water quality protection rate are better than pre-chlorination . High performance liquid chromatography (HPLC) analysis showed that the pre-oxidation can be the original water macromolecular organic matter oxidative decomposition to small organic molecules . Evaluation and analysis of potassium permanganate and chlorine on the change of the structure of organic matter , potassium permanganate and chlorine are the original unsaturated water oxidation of organic matter is broken down into a number of oxygen-containing groups by chromatography - mass spectrometry (GC-MS) organics such as carboxylic acids, alcohols and aldehydes and other organic compounds, but the pre-chlorination will appear in the water some halides, halogenated product is not only on the benzene ring , and appears in the hydrocarbon chain .

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CLC: > Industrial Technology > Building Science > Municipal Engineering > Water supply project ( on the Water Works )
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