炭砂双层滤料浮滤池工艺处理藻污染水库水的试验研究

发布时间：2018-12-23 20:52

【摘要】：目前水库水源藻污染日益严重,传统沉淀固液分离工艺难以满足净水要求。以鹊山引黄水库高藻原水为研究对象,开发了炭砂双层滤料浮滤池,考察了浮滤池工艺运行特性及运行效果。试验表明,絮凝剂选用聚合氯化铝铁(PAFC),在投药量4.0 mg·L-1(以Al3+计),回流比8%,溶气压力0.4 MPa时,运行效果较优。炭层所含生物量约占滤料层总生物量的97.4%(最高值50.2 nmol P·g-1),是砂滤层(3.0 nmol P·g-1)的16.7倍,污染物的去除主要发生在活性炭层。试验期间,浮滤池工艺对颗粒物、蓝绿藻、浊度、CODMn、NPOC、UV254、氨氮的去除率分别达到96.48%、92.40%、92.56%、57.41%、51.60%、52.50%、75.67%,嗅味由4级降为0级,出水土臭素、二甲基异冰片含量均小于检出限,一氯二溴甲烷、三氯甲烷前体物的去除率分别达到55.1%和60%,表明浮滤池工艺对常规指标、藻类、嗅味物质、消毒副产物前体物去除效果显著。
[Abstract]:At present, the pollution of water source algae is becoming more and more serious, so it is difficult to meet the requirement of purifying water by traditional precipitation solid-liquid separation technology. Taking the raw water of high algal algae from Jieshan Yellow River diversion Reservoir as the research object, a carbon sand double-layer filter material floating filter was developed, and the operation characteristics and operation effect of the floating filter were investigated. The experimental results show that the flocculant with polyaluminium ferric chloride (PAFC),) has a better running effect when the dosage is 4.0 mg L ~ (-1), the reflux ratio is 8%, and the dissolved gas pressure is 0.4 MPa. The biomass of the carbon layer is about 97.4% of the total biomass of the filter media layer (the highest value is 50.2 nmol P g ~ (-1), which is 16.7 times of the sand filter layer (3.0 nmol P g ~ (-1). The removal of pollutants mainly occurs in the activated carbon layer. During the experiment, the removal rates of particulate matter, cyanobacteria, turbidity and CODMn,NPOC,UV254, ammonia nitrogen by floating filter process reached 96.48 and 92.40 respectively. The odor was reduced from grade 4 to grade 0, and the contents of soil and water odor and dimethyl isoborneol were all less than the detection limit. The removal rates of precursors of dichloromethane and trichloromethane reached 55.1% and 60% respectively. The removal effect of odour substance and disinfection byproduct precursor is remarkable.
【作者单位】：北京工业大学建筑工程学院北京市水质科学与水环境恢复工程重点实验室;山东建筑大学市政与环境工程学院;济南市供排水监测中心;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07404-003-006) 国家自然科学基金项目(51078008) 住建部科技计划项目(2012-K7-8) 北京市教委重点基金项目(KZ201110005008) 北京市自然科学基金项目(8122005) 北京市科技创新平台项目(004000546612010)~~
【分类号】：TU991.2

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