摘要制革废水的水质复杂，水量变化大，所以，需要进行处理后才能直接排放。设计制革污水处理水量25000m³/d，污水水质：COD=2600mg/L，BOD=1300mg/L，SS=2000mg/L,pH=9~10,色度380倍，硫化物70mg/L，总铬30mg/L。制革污水处理后达到《污水综合排放标准》（GB8978-1996）中的一级标准，即出水水质达到COD≤100mg/L，BOD≤20mg/L，SS≤70mg/L，pH为6~9，色度≤50倍，硫化物≤1。0mg/L，总铬≤0。5mg/L。84530

采用物化-生化处理方法，即混凝沉淀+接触氧化工艺。制革废水经过格栅进入初沉池，流入调节池，调整水质。然后，污水进入混凝沉淀池，采用聚合硫酸铁作为混凝剂，SS的出去效率为85%。污水流入接触氧化池，最后污水流入二沉池，出水COD为78mg/L，BOD为16。6mg/L，SS为29。4mg/L，色度为25。2倍，总铬为0。48mg/L，硫化物为0。98mg/L达标外排。污泥排入集泥井，经过污泥浓缩池，由泵房排入脱水间，最终污泥外运。

毕业论文关键词：制革污水；混凝沉淀；接触氧化

Abstract Due to the complexity of sewage water quality, water quantity change。 It needs to be processed to direct emissions。

The designing scale of tannery wastewater plant is 25000m3/d, the quality of water are COD=2600mg/L, BOD=1300mg/L, SS=2000mg/L, pH=9~10, chroma=380 times, sulfide=70mg/L, total chrome=30mg/L。 After disposing of tannery wastewater, the quality of water  reach the first standard (GB8978-1996 of integrated wastewater discharge standard)，the quality of water should attain the following standards COD≤100mg/L, BOD≤20mg/L, SS≤70mg/L, pH=6~9, chroma≤50 times, sulfide≤1。0mg/L, total chrome≤0。5mg/L。

The materialized - biochemical treatment method, namely the coagulation precipitation and contact oxidation process。 Tanning wastewater by grid into the primary sedimentation tank, at the beginning of flow regulating the primary sedimentation tank, adjust the water quality。 Then sewage into coagulation sedimentation tank, Using polymeric ferric sulfate as coagulant, SS out efficiency of 85%。 The sewage flows into the contact oxidation pool, The sewage flows into the contact oxidation pool, The sewage into the second sedimentation tank。 Effluent COD is 78 mg/L, BOD is 16。6 mg/L, SS is 29。4 mg/L, chroma is 25。2 times, total chromium was 0。48 mg/L, sulfide is 0。98 mg/L, standard discharge。 Sludge discharged into sets of mud well, after the sludge concentration pool, by the pump room into the dehydration, the final sludge sinotrans。

Keywords: tannery wastewater; coagulating sedimentation; contact oxidation process

目 录

第一章 绪论 1

1。1 制革污水的概况 1

1。1。1 制革废水的产生和来源 1

1。1。2 制革废水的危害 1

1。1。3 制革废水的水质 2

1。2 课题的研究目的和内容 2

1。2。1 课题的目的和要求 2

第二章 工艺确定 4

2。1 工艺对比 4

2。2 工艺的选择 4

2。2。1 混凝沉淀法 4

2。2。2 接触氧化法 4

2。2。3 工艺流程 5

2。3 设计依据、规范 5

第三章 构筑物设计计算 6

3。1 进水渠道 6