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7.污泥浓缩池
初步降低废水污泥含水率的废水处理构筑物。一般为圆形或方形池。含水率约从99.2％～99.5％降至96％～98％。浓缩的目的是减少污泥体积，便于后续处理。
8.贮泥池
采用矩形贮泥池，贮存来自初次沉淀池、接触氧化池产生的污泥、二次沉淀池的污泥量。
9.污泥脱水间
将流态的原生、浓缩或消化污泥脱除水分，转化为半固态或固态泥块的一种污泥处理方法。经过脱水后，污泥含水率可降低到百分之五十五至百分之八十，视污泥和沉渣的性质和脱水设备的效能而定。污泥的进一步脱水则称污泥干化，干化污泥的含水率低于百分之十。脱水的方法，主要有自然干化法、机械脱水法和造粒法。自然干化法和机械脱水法适用于污水污泥。造粒法适用于混凝沉淀的污泥。
Design specification(Abstract)
Design task
Design title：The optimization design of multistage biochemical treatment of 5000m3/d wastewater
Task content：wastewater of paper making contains a lot of seston, COD of raw water is about 3000mg/l, BC ratio of about 0.2. First through a deal(Flotation or Sedimentation). Then after secondary treatment, multistage biochemical process. Then using ultrafiltration membrane separation process, emissions standards.
Design requirements：Paper industry wastewater：CODcr=3000mg/l, BOD5=600mg/l, SS=700 mg/l. After treatment designed to achieve water quality to CODcr≤100 mg/l, BOD5≤20 mg/l, SS≤70 mg/l
Technological process
It is intended to adopt A/O method is the main process.In materialized - a combination of biochemical methods to multi-stage biological treatment(Secondary treatment) based approach to supplement precipitation(Primary treatment), according to a lot of theoretical reference and subject requirements. First the waste water recycled fiber microfiltration unit, after upgrading from the pump to the conditioning tank, after which the homogeneous, both the amount sank into the pool to join PAC, PAM agents to remove sand and other contaminants larger density, sank pool
effluent into the A/O biological reaction tank, the water in the secondary sedimentation tank for mud separation, as the active part of the sludge settling back into the anaerobic system, sludge thickening tank into the supernatant is reached emission standards after Fenton oxidation , concentrate thickener into the final after dehydration shipped dry mud.
目 录
1 概论 1
1.1 选题的依据和意义 1
1.1.1 选题依据 1
1.1.2 选题意义 1
1.2 造纸废水国内外处理现状 1
1.2.1 造纸废水处理方法概述 2
1.2.2 造纸废水国外研究概括 3
1.3小结 3
2 工艺的选择及改进 5
2.1 设计概况 5
2.1.1 设计内容 5
2.1.2 设计水质 5
2.1.3 设计的原则 5
2.2 造纸废水不同生化处理工艺的对比分析 5
2.2.1 稳定塘 5
2.2.2 曝气塘 7
2.2.3 活性污泥法 6
2.2.4 生物膜法 6
2.2.5 各种处理工艺方法之间的比较 7
2.3 工艺流程 7
2.4 改进措施 8
2.5 各主要构筑物预期处理效果 10
2.6 效益分析 10
2.6.1 环境效益 10
2.6.2 社会效益 10
2.6.3 经济效益 10