CN212894352U - 一种食品工业废水深度处理及水回用系统 - Google Patents
一种食品工业废水深度处理及水回用系统 Download PDFInfo
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- CN212894352U CN212894352U CN202021410134.8U CN202021410134U CN212894352U CN 212894352 U CN212894352 U CN 212894352U CN 202021410134 U CN202021410134 U CN 202021410134U CN 212894352 U CN212894352 U CN 212894352U
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- water
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- sludge
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 235000013305 food Nutrition 0.000 title claims abstract description 38
- 238000004064 recycling Methods 0.000 title claims abstract description 14
- 238000004065 wastewater treatment Methods 0.000 title claims description 11
- 239000010802 sludge Substances 0.000 claims abstract description 53
- 239000012528 membrane Substances 0.000 claims abstract description 45
- 239000002351 wastewater Substances 0.000 claims abstract description 41
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 31
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 29
- 238000000909 electrodialysis Methods 0.000 claims abstract description 21
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 20
- 238000001556 precipitation Methods 0.000 claims abstract description 13
- 238000009287 sand filtration Methods 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 9
- 239000006004 Quartz sand Substances 0.000 claims description 18
- 238000004062 sedimentation Methods 0.000 claims description 18
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Abstract
本申请公开一种食品工业废水深度处理及水回用系统，包括顺水流方向依次设置的物化沉淀单元、生物处理单元和膜深度处理单元以及与所述物化沉淀单元及生物处理单元连接的污泥处理单元；所述膜深度处理单元包括依次设置的砂滤装置、超滤装置、电渗析装置、反渗透装置和杀菌消毒池；所述砂滤装置的进水口连接生物处理单元出水，所述杀菌消毒池的出水回用。本实用新型工艺具有运行费用低、投资少、回用水质达到饮用水标准、污泥资源利用等优点，能够实现低成本食品工业废水深度处理及水回用工艺。
Description
技术领域
本实用新型属于污水处理处理技术领域，尤其涉及一种食品工业废水深度处理及回用系统。
背景技术
食品工业是指以农、牧、渔、林业产品为原料进行加工的行业，食品工业废水包括肉制品加工废水、啤酒饮料生产废水、水产品加工废水、谷制品加工废水及味精工业废水等。食品工业往往规模非常大，因此食品工业废水通常具有很大的排放量，成为了污染我国水环境的主要因素之一。依据相关资料统计，以废水COD排放量为标准，食品工业废水污染程度已经成为轻工业行业中的第二名，其COD的排放量占我国工业废水COD总排放量的11％。食品工业废水通常具有易腐败的特点，其有机物和SS值都较高且含有一定量的致病毒菌等。食品工业废水若不经过有效处理就直接排放，会使水体富营养化，造成鱼类等水生动物死亡，并严重破坏和危害自然生态及人类生活环境。
目前，食品工业废水处理在工程化应用中，以好氧和厌氧生物法为主、辅助混凝沉淀过滤等物化法处理法较为常见。申请利号：201810743932.3公布了一种食品生产废水处理工艺及其装置，其装置包括前后顺序相接的格栅池、调节池、污泥泵、厌氧折流板反应器、序列间歇式活性污泥池、贮水观察池和无臭氧紫外线灭菌槽组成。专利号：201720860626.9公布了一种食品生产废水处理系统，其系统由预处理池、pH调节池、混凝池、第一沉淀池、厌氧池、两级生物接触氧化池、第二沉淀池和消毒池组成。虽然食品工业废水经上述两种处理系统处理后能达到外排的标准，但其处理后水中依然存在大量食品添加剂盐分，无法回用，造成大量的水资源浪费。此外，常规的好氧池需配套沉淀池使用，占地面积大，且污泥处理也是亟需解决的问题。
因此，亟需一种占地面积少、投资成本低以及运行费用低废水回用率高以及污泥资源化利用的食品工业废水深度处理及水回用工艺。
实用新型内容
本申请提供一种食品工业废水深度处理及水回用系统，将食品工业收集的废水依次经过物化处理、生物处理和膜深度处理，出水淡水用于食品工业生产回用水，浓水达标外排，污泥干化堆肥利用。
一种食品工业废水深度处理及水回用系统，包括顺水流方向依次设置的物化沉淀单元、生物处理单元和膜深度处理单元以及与所述物化沉淀单元及生物处理单元连接的污泥处理单元；所述膜深度处理单元包括顺水流方向依次设置的砂滤装置、超滤装置、电渗析装置、反渗透装置和杀菌消毒池；所述砂滤装置的进水口连接生物处理单元出水，所述杀菌消毒池的出水回用。
通过物化沉淀对食品工业废水中大块浮渣截留和悬浮物混凝沉淀；通过生物处理单元利用厌氧和好氧微生物降解废水中高浓度有机物；通过膜深度处理单元对废水中悬浮物、可溶性盐分、胶体、有机物质等进行深度去除；通过杀菌消毒池对深度过滤淡水进行杀菌消毒后进入车间回用；通过污泥处理单元对物化沉淀单元和生物处理单元产生的污泥进行浓缩和干化，产生的固体物作为肥料用于农业生产。采用本实用新型食品工业废水深度处理及水回用系统，废水外排量少、节约企业用水量且无固体废弃物外排。
本实用新型工艺具有运行费用低、投资少、回用水质达到饮用水标准、污泥资源利用等优点，能够实现低成本食品工业废水深度处理及水回用工艺。
以下还提供了若干可选方式，但并不作为对上述总体方案的额外限定，仅仅是进一步的增补或优选，在没有技术或逻辑矛盾的前提下，各可选方式可单独针对上述总体方案进行组合，还可以是多个可选方式之间进行组合。
可选的，所述物化沉淀单元包括顺水流方向依次设置的格栅池、调节池和沉淀池；所述生物处理单元包括依次设置的厌氧池和MBR反应器，所述厌氧池的进水口通过管路连接所述沉淀池的出水口，所述MBR反应器的出水口通过管路连接所述砂滤装置的进水口；所述污泥处理单元包括依次设置的污泥浓缩池和污泥干化床，所述污泥浓缩池的进泥口通过管路连接所述格栅池、沉淀池、厌氧池和MBR反应器的排泥口，所述污泥浓缩池的清水出口连接调节池。
可选的，所述格栅池内在顺水流方向上依次设置粗、细两级格栅板，粗格栅板隔条间隙在5-20mm，细格栅板隔条间隙在1-5mm。
可选的，所述厌氧池采用折流板反应器。
可选的，所述砂滤装置的出水口通过管路连接超滤装置的进水口；所述超滤装置的出水口通过管路连接电渗析装置的进水口；所述电渗析装置的淡水出口通过管路连接反渗透装置的进水口；所述反渗透装置的淡水出口通过管路接入杀菌消毒池；所述电渗析装置和反渗透装置的浓水出口连接外排纳污管；所述杀菌消毒池的出水口通过管路连接食品工业用水车间。
可选的，所述砂滤装置为石英砂过滤器；石英砂过滤器内铺设至少两层不同粒径的石英砂，上层石英砂粒径范围在0.5mm-2mm，下层石英砂粒径范围在2mm-3mm，单层石英砂高度在0.3m-0.8m。
可选的，所述超滤装置为超滤膜元件采用中空纤维超滤膜的超滤装置。
可选的，所述反渗透装置的膜组采用卷式复合膜，膜压力容器采用FRP压力膜管，耐压300PSI。
与现有技术相比，本实用新型至少具有以下有益效果之一：
(1)提供了一种食品工业废深度水处理及水回用系统，将物化沉淀单元、生物处理单元和膜深度处理单元有效的结合使用，终端出水可以达到饮用水标准。
(2)提供了一种高浓度有机废水处理系统，通过厌氧反应池和MBR生物反应器结合，对废水中氨氮、COD去除效率高，且设施占地面积小。
(3)提供了一种低成高浓度有机废水污泥资源化处理系统，工艺简单，运行稳定。
附图说明
图1为本申请的结构示意图图。
图中所示附图标记如下：
10-物化沉淀单元
11-格栅池 12-调节池 13-沉淀池
20-生物处理单元
21-厌氧池 22-MBR反应池
30-膜深度处理单元
31-砂滤装置 32-超滤装置 33-电渗析装置
34-反渗透装置 35-臭氧消毒池
40-污泥处理单元
41-污泥浓缩池 42-污泥干化床
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
为了更好地描述和说明本申请的实施例，可参考一幅或多幅附图，但用于描述附图的附加细节或示例不应当被认为是对本申请的发明创造、目前所描述的实施例或优选方式中任何一者的范围的限制。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。
如图1所示，一种食品工业废水深度处理及水回用系统，包括依次设置的物化沉淀单元10、生物处理单元20和膜深度处理单元30以及与物化沉淀单元10及生物处理单元20连接的污泥处理单元40。
物化沉淀单元10包括顺水流方向依次设置的格栅池11、调节池12和沉淀池13，待处理废水送入格栅池11内，格栅池出水送入调节池12内，调节池出水送入沉淀池13内，格栅池和沉淀池的污泥均送入污泥处理单元40。组成物化沉淀单元的设备本身均为现有技术可实现，作为格栅池的一种实施方式，格栅池内在水流方向上依次设置粗、细两级格栅板，粗格栅板隔条间隙在5-20mm，细格栅板隔条间隙在1-5mm。其中粗格栅板主要拦截大块浮渣，细格栅板拦截小块浮渣。粗格栅板对后端的细格栅板起到保护作用，防止细格栅板快速堵死而影响格栅池出水量。粗格栅板拦截的大块浮渣和细格栅板拦截的小块浮渣均送入污泥处理单元进行浓缩池脱水。
生物处理单元20包括依次设置的厌氧池21和MBR反应器22，厌氧池21采用ABR池，厌氧池的进水口通过管路连接沉淀池13的出水口，厌氧池的出水口通过管路连接MBR反应器22的进水口，MBR反应器22的出水口通过管路连接膜深度处理单元30。
作为厌氧池的一种具体实施方式，厌氧池可采用折流板反应器。厌氧池对沉淀池出水中有机物进行分解，废水在厌氧折流板反应器中沿折流板作折线型流动，与厌氧反应器中厌氧菌充分接触，废水中大分子有机物被厌氧菌分解成小分子。厌氧生物法虽然能够承受高浓度的有机负荷、消耗少量的能源、产生少量的污泥，但废水仅仅通过厌氧反应后水中COD和BOD均较高，超过深度处理装置进水指标，因此需要通过好氧反应对废水中的有机物进一步降解处理。MBR生物反应器是在好氧池内设置膜分离设备，截留槽内的含有微生物的活性污泥，提高活性污泥浓度，实现对高浓度有机物氧化分解成水和CO2，可以降低生物反应池的体积。厌氧池和MBR生物反应器底部沉淀的污泥均通过污泥输送泵送入污泥处理单元进行浓缩池脱水。
食品工业废水经前端物化处理和生化处理去除大部分悬浮物、COD和BOD，需要进一步进行膜深度处理。
膜深度处理单元30包括依次设置的砂滤装置31、超滤装置32、电渗析装置33、反渗透装置34和杀菌消毒池35，砂滤装置31的进水口通过管路连接MBR处理器22的出水口、出水口通过管路连接超滤装置32的进水口；超滤装置32的出水口通过管路连接电渗析装置33的进水口；电渗析装置33的淡水出口通过管路连接反渗透装置34的进水口；反渗透装置34的淡水出口通过管路接入杀菌消毒池35；电渗析装置和反渗透装置的浓水出口均连接外排纳污管；杀菌消毒池35的出水口通过管路连接食品工业用水车间。
食品工业废水经前端物化处理和生化处理去除大部分悬浮物、COD和BOD后，进一步依次经过砂滤装置、超滤装置、电渗析和反渗透装置进行深度处理，依次进行不溶性杂质、絮凝物、大分子有机物、胶体和微生物及可溶性盐分去除，反渗透产出水经过杀菌消毒池后输送至个食品工业用水车间，电渗析和反渗透浓水经纳污管外排。砂滤装置和超滤装置的反冲洗水均回流至调节池后再次经过生物处理。
砂滤装置用于过滤生化出水中大部分的不溶性微小杂质、部分胶体的絮状物和有机物，降低出水浊度和悬浮物，使出水的水质达到后续超滤装置的进水要求。作为砂滤装置31的一种具体实施方式，砂滤装置采用石英砂过滤器；石英砂过滤器内铺设至少两层不同粒径的石英砂，上层石英砂粒径范围在0.5mm-2mm，下层石英砂粒径范围在2mm-3mm，单层石英砂高度在0.3m-0.8m。
超滤装置通过超滤膜截留水中的悬浮物等大分子有机物、胶体和微生物，保证后端电渗析和反渗透进水水质要求。作为超滤装置的一种具体实施方式，超滤装置采用的超滤膜元件为中空纤维超滤膜，具有耐污染和耐高悬浮物的优点。
电渗析装置主要用于去除废水中大部分可溶性盐分。完成超滤后的淡水清液，通过装有阴阳离子交换膜、浓淡水隔板交错排列而构成的电渗析隔室时，在直流电场的作用下产生离子迁移，水中阴离子向阳极方向迁移，阳离子向阴极方向。由于离子交换膜具有选择透过性，浓缩室中盐含量逐渐升高，而淡化室中的盐含量逐渐降低，从而达到脱盐的目的。电渗析装置采用常规的市售设备即可。
反渗透装置用于脱除水中剩余的可溶性盐分、胶体、有机物质等。完成电渗析的淡水经高压泵送至反渗透膜组件内，利用高压泵提供的压差，淡水穿过膜层从淡水排出口外排至反渗透产水池，由泵输送至回用水车间，浓水继续沿膜层流动，经反渗透浓缩后浓水体积缩减至反渗透进水体积的25-35％，由浓水排出口外排至纳污管。作为反渗透装置的一种具体实施方式，反渗透装置的膜组采用卷式复合膜，反渗透膜的运行压力为15-25MPa，产出淡水含盐量小于0.05％；膜压力容器采用FRP压力膜管，耐压300PSI。
反渗透装置中膜可以截留大部分细菌或病菌，但是其产水水中依然存在少量的细菌和病菌，直接回用对食品安全存在潜在危害，因此必须对反渗透产出水通过杀菌消毒再回用。杀菌消毒池中通过添加一定的臭氧离子对反渗透产水进行杀菌消毒。
污泥处理单元40包括依次设置的污泥浓缩池41和污泥干化床42，污泥浓缩池41的进泥口通过管路与格栅池11、沉淀池13、厌氧池21和MBR反应器22的排泥口连接，污泥浓缩池的清液通过管路回流至调节池，再次经过生物降解有机物；污泥浓缩池的排泥口通过管路接入污泥干化床，浓缩后的污泥排入污泥干化床干化成固体物作为肥料。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。
Claims (8)
1.一种食品工业废水深度处理及水回用系统，其特征在于，包括顺水流方向依次设置的物化沉淀单元、生物处理单元和膜深度处理单元以及与所述物化沉淀单元及生物处理单元连接的污泥处理单元；所述膜深度处理单元包括顺水流方向依次设置的砂滤装置、超滤装置、电渗析装置、反渗透装置和杀菌消毒池；所述砂滤装置的进水口连接生物处理单元出水，所述杀菌消毒池的出水回用。
2.根据权利要求1所述的食品工业废水深度处理及水回用系统，其特征在于，所述物化沉淀单元包括顺水流方向依次设置的格栅池、调节池和沉淀池；所述生物处理单元包括依次设置的厌氧池和MBR反应器，所述厌氧池的进水口通过管路连接所述沉淀池的出水口，所述MBR反应器的出水口通过管路连接所述砂滤装置的进水口；所述污泥处理单元包括依次设置的污泥浓缩池和污泥干化床，所述污泥浓缩池的进泥口通过管路连接所述格栅池、沉淀池、厌氧池和MBR反应器的排泥口，所述污泥浓缩池的清水出口连接调节池。
3.根据权利要求2所述的食品工业废水深度处理及水回用系统，其特征在于，所述格栅池内在顺水流方向上依次设置粗、细两级格栅板，粗格栅板隔条间隙在5-20mm，细格栅板隔条间隙在1-5mm。
4.根据权利要求2所述的食品工业废水深度处理及水回用系统，其特征在于，所述厌氧池采用折流板反应器。
5.根据权利要求1所述的食品工业废水深度处理及水回用系统，其特征在于，所述砂滤装置的出水口通过管路连接超滤装置的进水口；所述超滤装置的出水口通过管路连接电渗析装置的进水口；所述电渗析装置的淡水出口通过管路连接反渗透装置的进水口；所述反渗透装置的淡水出口通过管路接入杀菌消毒池；所述电渗析装置和反渗透装置的浓水出口连接外排纳污管；所述杀菌消毒池的出水口通过管路连接食品工业用水车间。
6.根据权利要求1所述的食品工业废水深度处理及水回用系统，其特征在于，所述砂滤装置为石英砂过滤器；石英砂过滤器内铺设至少两层不同粒径的石英砂，上层石英砂粒径范围在0.5mm-2mm，下层石英砂粒径范围在2mm-3mm，单层石英砂高度在0.3m-0.8m。
7.根据权利要求1所述的食品工业废水深度处理及水回用系统，其特征在于，所述超滤装置为超滤膜元件采用中空纤维超滤膜的超滤装置。
8.根据权利要求1所述的食品工业废水深度处理及水回用系统，其特征在于，所述反渗透装置的膜组采用卷式复合膜，膜压力容器采用FRP压力膜管，耐压300PSI。
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