CN105110525A - System for treating artificial flower dyeing wastewater and treatment method thereof - Google Patents
System for treating artificial flower dyeing wastewater and treatment method thereof Download PDFInfo
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- 239000002351 wastewater Substances 0.000 title claims abstract description 63
- 238000004043 dyeing Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005188 flotation Methods 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000010802 sludge Substances 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 20
- 238000004062 sedimentation Methods 0.000 claims abstract description 17
- 238000005185 salting out Methods 0.000 claims abstract description 15
- 238000004065 wastewater treatment Methods 0.000 claims abstract description 14
- 230000008719 thickening Effects 0.000 claims abstract description 7
- 238000005868 electrolysis reaction Methods 0.000 claims description 29
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 238000005345 coagulation Methods 0.000 claims description 24
- 230000015271 coagulation Effects 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 238000006386 neutralization reaction Methods 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 10
- 239000006228 supernatant Substances 0.000 claims description 10
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 7
- 239000003513 alkali Substances 0.000 claims description 7
- 239000010865 sewage Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 239000000701 coagulant Substances 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 5
- 239000013535 sea water Substances 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000012065 filter cake Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 2
- 239000003610 charcoal Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000005189 flocculation Methods 0.000 abstract description 2
- 230000001112 coagulating effect Effects 0.000 abstract 1
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- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 230000002787 reinforcement Effects 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000003292 glue Substances 0.000 description 2
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- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
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Abstract
Description
技术领域technical field
本发明涉及废水处理的技术领域，尤其涉及一种人造花染色废水处理系统及其处理方法。The invention relates to the technical field of wastewater treatment, in particular to an artificial flower dyeing wastewater treatment system and a treatment method thereof.
背景技术Background technique
人造花的生产过程中排放的染色废水，含有树脂胶液、各种染料及有机溶剂，具有色度深，COD浓度高，悬浮物多，毒性大，可生化性差等特点，属于较难处理的有机工业废水，对环境危害大。The dyeing wastewater discharged during the production of artificial flowers contains resin glue, various dyes and organic solvents. It has the characteristics of deep chroma, high COD concentration, high suspended solids, high toxicity, and poor biodegradability. It is difficult to treat. Organic industrial wastewater is harmful to the environment.
对于染料废水的处理方法很多，归纳起来主要有生物法、化学氧化法、絮凝沉淀法、吸附法、膜分离法、气浮法等，但是上述诸方法在能耗、经济、处理效果等方面均存在各自的缺陷，因此采用单一的处理工艺方法很难取得满意的效果。人造花染色废水作为一种特殊的染料废水，其废水成分特征势必不同于一般染料废水，难以直接用一般的物化及生化方法使得其达标排放。迄今，有关人造花染色废水处理工艺方法方面的文献报道很少。广东某人造花制品有限公司采用“混凝气浮-稀释-生物接触氧化-沉淀”的工艺处理人造花果染色废水，处理效果较好，但该工艺需要大量的生活污水对原水进行稀释，生化处理单元占地面积大。There are many treatment methods for dye wastewater, which mainly include biological method, chemical oxidation method, flocculation precipitation method, adsorption method, membrane separation method, air flotation method, etc. There are their own defects, so it is difficult to achieve satisfactory results with a single treatment process. As a special kind of dye wastewater, artificial flower dyeing wastewater must be different from general dye wastewater in its composition characteristics, and it is difficult to directly use general physicochemical and biochemical methods to make it discharge up to the standard. So far, there are few literature reports on the treatment process of artificial flower dyeing wastewater. An artificial flower products Co., Ltd. in Guangdong adopts the process of "coagulation air flotation-dilution-biological contact oxidation-precipitation" to treat artificial flower and fruit dyeing wastewater. The treatment effect is good, but this process requires a large amount of domestic sewage to dilute the raw water. The processing unit occupies a large area.
有鉴于此，本发明人研究和设计了一种人造花染色废水处理系统及其处理方法，本案由此产生。In view of this, the present inventor has researched and designed a kind of artificial flower dyeing wastewater treatment system and treatment method thereof, and this case arises from it.
发明内容Contents of the invention
本发明为了解决难降解人造花染色废水处理过程中遇到的困难，提供一种净化效果好、工艺简单、占地面积少、运行成本低的人造花染色废水处理系统及其处理方法。In order to solve the difficulties encountered in the treatment process of refractory artificial flower dyeing wastewater, the present invention provides an artificial flower dyeing wastewater treatment system and a treatment method thereof with good purification effect, simple process, small floor space and low operating cost.
为了实现上述目的，本发明解决其技术问题所采取的技术方案是：In order to achieve the above object, the technical solution taken by the present invention to solve the technical problems is:
一种人造花染色废水处理系统，包括依次设置的格栅池、调节池、气浮池、中间水池、微电解反应池、中和混凝反应池、沉淀池及污泥浓缩池；其中所述调节池与格栅池相连，调节池内设有潜水搅拌器；所述气浮池的进水端通过管道与调节池的出水口相连，且管路中设有提升泵；所述的中间水池的进水通过管道与气浮池的出水口相连；所述微电解反应池的进水管与中间水池相连，微电解反应池中设有铁炭填料；所述中和混凝反应池的进水端、出水端分别连接微电解反应池和沉淀池；所述沉淀池的污泥通过污泥管与污泥浓缩池相连；污泥浓缩池的上清液通过管道与调节池相连，该污泥浓缩池的污泥通过管道与压滤机相连，压滤机的滤液通过管道与调节池相连。A wastewater treatment system for artificial flower dyeing, comprising a grid tank, a regulating tank, an air flotation tank, an intermediate tank, a micro-electrolysis reaction tank, a neutralization coagulation reaction tank, a sedimentation tank and a sludge concentration tank arranged in sequence; wherein the adjustment The pool is connected with the grid pool, and a submersible mixer is provided in the adjustment pool; the water inlet of the air flotation pool is connected with the water outlet of the adjustment pool through a pipeline, and a lifting pump is installed in the pipeline; the water inlet of the intermediate pool Connect to the water outlet of the air flotation tank through pipelines; the water inlet pipe of the micro-electrolysis reaction tank is connected to the intermediate pool, and iron carbon filler is arranged in the micro-electrolysis reaction tank; the water inlet and outlet of the neutralization coagulation reaction tank Connect the micro-electrolysis reaction tank and the sedimentation tank respectively; the sludge of the sedimentation tank is connected with the sludge concentration tank through the sludge pipe; the supernatant of the sludge concentration tank is connected with the adjustment tank through the pipeline, and the sludge of the sludge concentration tank The mud is connected to the filter press through the pipeline, and the filtrate of the filter press is connected to the regulating tank through the pipeline.
作为实施例的优选方式，所述气浮池和调节池的之间设置管道混合器，管道混合器通过加药管与盐析剂添加装置相连。As a preferred mode of the embodiment, a pipeline mixer is arranged between the air flotation tank and the adjustment tank, and the pipeline mixer is connected to the salting-out agent adding device through a drug feeding pipe.
作为实施例的优选方式，所述的气浮池出水管连接回流管至溶气罐，溶气罐接有空气管道。As a preferred mode of the embodiment, the outlet pipe of the air flotation tank is connected to the return pipe to the air-dissolving tank, and the air-dissolving tank is connected to an air pipeline.
作为实施例的优选方式，所述的中间水池和所述微电解反应池之间设有提升泵。As a preferred mode of the embodiment, a lift pump is provided between the intermediate water tank and the micro-electrolysis reaction tank.
作为实施例的优选方式，所述的微电解反应池与酸添加装置、曝气装置相连。As a preferred mode of the embodiment, the micro-electrolysis reaction tank is connected with an acid addition device and an aeration device.
作为实施例的优选方式，所述的中和混凝反应池还具有碱液加入口和助凝剂加入口，分别与碱液添加装置、助凝剂添加装置相连。As a preferred mode of the embodiment, the neutralization coagulation reaction tank also has an alkali liquor inlet and a coagulant aid inlet, which are respectively connected with the alkali liquor addition device and the coagulation aid addition device.
一种人造花染色废水处理方法，包括以下步骤：A method for treating artificial flower dyeing wastewater, comprising the following steps:
步骤一、人造花染色废水经格栅拦截大块杂物后，自流至调节池，调节废水水量并均匀水质；Step 1. After the artificial flower dyeing wastewater passes through the grid to intercept large pieces of debris, it flows to the regulating pool by itself to adjust the wastewater volume and uniform water quality;
步骤二、调节池中废水由提升泵抽向气浮池，废水在进入气浮池之前，由盐析剂添加装置向气浮进水管里投加盐析剂，废水流经过管道混合器发生盐析反应后，进入气浮池的混合区，与释放后的溶气水混合接触，使絮凝体粘附在细微气泡上，然后进入气浮区，气浮反应时间30-40min，浮渣经排渣槽排除，清水由池底部流出；Step 2. The wastewater in the adjustment tank is pumped to the air flotation tank by the lifting pump. Before the wastewater enters the air flotation tank, the salting out agent is added to the air flotation inlet pipe by the salting out agent addition device, and the waste water flows through the pipeline mixer to undergo a salting out reaction. Finally, enter the mixing area of the air flotation tank, mix and contact with the released dissolved air water, make the flocs adhere to the fine air bubbles, and then enter the air flotation area, the air flotation reaction time is 30-40min, and the scum is removed by the slag discharge tank , clear water flows out from the bottom of the pool;
步骤三、气浮池出水自流入中间水池，以保证微电解池进水稳定均质；Step 3. The effluent water from the air flotation tank flows into the intermediate pool to ensure the stability and homogeneity of the water in the micro-electrolytic tank;
步骤四、中间水池废水由泵提升至装有铁炭填料的微电解反应池，投加酸控制废水pH为2-4，并开启曝气装置，进行微电解反应90-120min；Step 4. The wastewater in the middle pool is lifted by the pump to the micro-electrolysis reaction tank equipped with iron-carbon fillers, and acid is added to control the pH of the wastewater to 2-4, and the aeration device is turned on to carry out the micro-electrolysis reaction for 90-120 minutes;
步骤五、微电解出水自流至中和混凝反应池，并通过投加碱回调废水pH至8-10，接着投加助凝剂聚丙烯酰胺(PAM)，搅拌混凝反应15-30min；Step 5. The micro-electrolysis effluent flows to the neutralization coagulation reaction tank by itself, and the pH of the wastewater is adjusted to 8-10 by adding alkali, and then the coagulation aid polyacrylamide (PAM) is added, and the coagulation reaction is stirred for 15-30 minutes;
步骤六、中和混凝反应池出水自流至沉淀池，进行泥水分离；泥集于沉淀池池底泥斗中，通过污泥管进入污泥浓缩池，沉淀池内上清液则排入市政污水管网或深度处理后回用；Step 6. The effluent from the neutralization coagulation reaction tank flows automatically to the sedimentation tank for mud-water separation; the mud collects in the mud bucket at the bottom of the sedimentation tank and enters the sludge concentration tank through the sludge pipe, and the supernatant in the sedimentation tank is discharged into the municipal sewage Reuse after pipe network or advanced treatment;
步骤七、污泥在污泥浓缩池内进行浓缩，上清液回流至调节池再次进行循环处理，而污泥通过泵打入压滤机进行脱水干化处理，产生的滤饼进行填埋处置，压滤液回流至调节池再次进行循环处理。Step 7. The sludge is concentrated in the sludge thickening tank, and the supernatant is returned to the regulating tank for recirculation treatment, while the sludge is pumped into the filter press for dehydration and drying treatment, and the resulting filter cake is disposed of in a landfill. The press filtrate is returned to the regulating tank for recycling treatment again.
作为实施例的优选方式，所述步骤二中，所用盐析剂为氯化钠或者海水。As a preferred mode of the embodiment, in the second step, the salting-out agent used is sodium chloride or sea water.
作为实施例的优选方式，所述步骤四中，所述铁炭填料：所用铁为废铁刨花或铁粉，所用炭为活性炭，铁炭的质量配比为1:3-1:1。As a preferred mode of the embodiment, in the step 4, the iron-carbon filler: the iron used is scrap iron shavings or iron powder, the carbon used is activated carbon, and the mass ratio of iron-carbon is 1:3-1:1.
作为实施例的优选方式，所述步骤五中，所用碱为氢氧化钠溶液或石灰乳。As a preferred mode of the embodiment, in the fifth step, the alkali used is sodium hydroxide solution or milk of lime.
作为实施例的优选方式，所述步骤五中，所用助凝剂为聚丙烯酰胺。As a preferred mode of the embodiment, in the fifth step, the coagulation aid used is polyacrylamide.
采用本发明所述的技术方案后，具有以下有益效果：After adopting the technical scheme of the present invention, it has the following beneficial effects:
针对人造花染色废水水质特点，采用盐析强化气浮-铁炭微电解组合工艺，其中，盐析强化气浮工艺去除悬浮物、色度和有机物效果明显；铁炭微电解工艺在不需要外加电源条件下能够对色度和难生物降解的有机物有较好的去除效果，且以废铁屑作填料，费用低廉；因此，该处理工艺简洁，占地面少，操作简单易行，运行成本低。According to the water quality characteristics of artificial flower dyeing wastewater, the combination process of salting out enhanced air flotation-iron-carbon micro-electrolysis is adopted. Under the condition of power supply, it can have a good removal effect on chromaticity and refractory organic matter, and the waste iron filings are used as filler, so the cost is low; therefore, the treatment process is simple, occupies less land, is simple and easy to operate, and has low operating costs .
附图说明Description of drawings
图1为本发明的工艺流程图。Fig. 1 is a process flow diagram of the present invention.
具体实施方式Detailed ways
以下结合附图和具体实施方式以对本发明作进一步说明。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
实施例1Example 1
如图1所示的一种人造花染色废水处理系统，包括依次设置的格栅池、调节池、气浮池、中间水池、微电解反应池、中和混凝反应池、沉淀池及污泥池。格栅池内安置机械格栅，用于拦截废水中的大块杂物；调节池内设有潜水搅拌器，用于均匀水质；气浮池和调节池之间设置有提升泵，用于提升废水；气浮池上连有一条管道至溶气罐，溶气罐连接一条气管，气浮池出水管连接一条回流管至溶气罐；盐析剂添加装置与气浮池的进水管道相连；中间水池和所述微电解反应池之间设有提升泵；微电解反应池中设有铁炭填料，且分别与酸添加装置、曝气装置相连；中和混凝反应池分别与碱添加装置、助凝剂添加装置相连；沉淀池的底部设有泥斗，且泥斗底部通过污泥管与污泥池连通；所述污泥浓缩池和调节池之间设有污水回流泵，且通过污水回流管连通，污泥浓缩池上连有污泥泵，污泥泵出口端设有压滤机。A kind of artificial flower dyeing wastewater treatment system as shown in Figure 1, including grid tank, regulating tank, air flotation tank, intermediate tank, micro-electrolysis reaction tank, neutralization coagulation reaction tank, sedimentation tank and sludge tank arranged in sequence . A mechanical grille is placed in the grille pool to intercept large debris in the wastewater; a submersible mixer is installed in the adjustment pool for uniform water quality; a lift pump is installed between the air flotation pool and the adjustment pool to lift the waste water; air flotation There is a pipeline connected to the air-dissolving tank on the pool, and the air-dissolving tank is connected to a gas pipe, and the outlet pipe of the air flotation tank is connected to a return pipe to the air-dissolving tank; the salting-out agent adding device is connected to the water inlet pipe of the air flotation tank; A lifting pump is installed between the electrolytic reaction tanks; iron-carbon fillers are installed in the micro-electrolytic reaction tanks, and are connected to the acid adding device and aeration device respectively; the neutralization coagulation reaction tank is connected to the alkali adding device and the coagulant adding device respectively The bottom of the sedimentation tank is provided with a mud bucket, and the bottom of the mud bucket is connected to the sludge tank through a sludge pipe; a sewage return pump is provided between the sludge thickening tank and the regulating tank, and is connected through a sewage return pipe to concentrate the sludge A sludge pump is connected to the pool, and a filter press is installed at the outlet of the sludge pump.
利用上述一种人造花染色废水处理系统处理人造花染色废水的方法，包括以下步骤：The method for treating artificial flower dyeing wastewater by using the above-mentioned artificial flower dyeing wastewater treatment system comprises the following steps:
1)人造花染色废水经格栅拦截大块杂物后，自流至调节池，调节废水水量，同时启动搅拌器均匀水质；1) After the artificial flower dyeing wastewater passes through the grid to intercept large pieces of debris, it flows to the regulating pool by itself to adjust the amount of wastewater, and at the same time start the agitator to even out the water quality;
2)调节池中废水由泵提升至气浮池；为了强化气浮去除效果，废水进入气浮池之前，由盐析剂添加装置向气浮进水管中投加氯化钠或海水，经过管道混合器混合反应后的废水进入气浮池的混合区，与释放后的溶气水混合接触，使絮凝体粘附在细微气泡上，然后进入气浮区。絮凝体在气浮力的作用下浮向水面形成浮渣，可用机械或水力方式经排渣槽排除，下层清水由池底部流出，其中，一部分清水作为回流水，由回流泵输送至溶气罐，溶气罐停留时间为3-4min，压缩空气由空气压缩机压入溶气罐，形成的气泡进入气浮池，气浮反应时间为30-40min；2) The wastewater in the adjustment tank is lifted by the pump to the air flotation tank; in order to strengthen the air flotation removal effect, before the wastewater enters the air flotation tank, sodium chloride or seawater is added to the air flotation inlet pipe by the salting-out agent addition device, and passed through the pipeline mixer The waste water after the mixed reaction enters the mixing area of the air flotation tank, mixes and contacts with the released dissolved air water, makes the flocs adhere to the fine air bubbles, and then enters the air flotation area. The flocs float to the water surface under the action of air buoyancy to form scum, which can be removed through the slag discharge tank by mechanical or hydraulic means, and the lower layer of clean water flows out from the bottom of the pool, and part of the clean water is used as return water, which is transported to the dissolved air tank by the return pump. The residence time of the air tank is 3-4min, the compressed air is pressed into the dissolved air tank by the air compressor, and the formed bubbles enter the air flotation tank, and the air flotation reaction time is 30-40min;
3)气浮池出水自流进入中间水池，临时储存废水，且保证微电解池进水稳定均质；3) The effluent from the air flotation pool flows into the middle pool by itself, temporarily storing waste water, and ensuring the stability and homogeneity of the water entering the micro-electrolysis pool;
4)中间水池废水由泵提升至装有铁炭填料的微电解反应池，其中，所用铁为废铁刨花或铁粉，所用炭为活性炭，铁炭的质量配比为1:3-1:1；为了发挥微电解效果，可利用酸自动添加装置投加稀硫酸，控制废水pH在2-4范围内，微电解反应90-120min；4) The waste water in the intermediate pool is lifted by the pump to the micro-electrolysis reaction tank equipped with iron-carbon fillers, wherein the iron used is scrap iron shavings or iron powder, the carbon used is activated carbon, and the mass ratio of iron-carbon is 1:3-1: 1. In order to exert the micro-electrolysis effect, the acid automatic adding device can be used to add dilute sulfuric acid to control the pH of the wastewater in the range of 2-4, and the micro-electrolysis reaction takes 90-120 minutes;
5)微电解出水自流至中和混凝反应池后，利用自动添加装置依次投加碱(氢氧化钠溶液或石灰乳)和PAM助凝剂，控制pH为8-10范围内，混凝反应15-30min；5) After the micro-electrolysis effluent flows to the neutralization coagulation reaction tank by itself, the automatic adding device is used to add alkali (sodium hydroxide solution or lime milk) and PAM coagulant in sequence, and the pH is controlled within the range of 8-10, and the coagulation reaction 15-30min;
6)中和混凝反应池出水自流至沉淀池，进行泥水分离；泥集于沉淀池池底泥斗中，通过污泥管进入污泥浓缩池；沉淀池内上清液则排入市政污水管网或深度处理后回用；6) The effluent of the neutralization coagulation reaction tank flows to the sedimentation tank by itself, and the mud and water are separated; the mud is collected in the mud bucket at the bottom of the sedimentation tank, and enters the sludge concentration tank through the sludge pipe; the supernatant in the sedimentation tank is discharged into the municipal sewage pipe Reuse after net or advanced treatment;
7)通过污泥管进入污泥浓缩池内的污泥，在重力作用下进行分层浓缩，上清液回流至调节池再次进行循环处理，污泥通过泵打入压滤机进行脱水干化处理，压滤液返回至调节池再次进行循环处理，压滤后的滤饼外运垃圾填埋场填埋处置。7) The sludge that enters the sludge thickening tank through the sludge pipe is layered and concentrated under the action of gravity, and the supernatant is returned to the regulating tank for recirculation treatment, and the sludge is pumped into the filter press for dehydration and drying treatment , the press filtrate is returned to the regulating tank for recycling treatment again, and the filter cake after press filtration is transported to the landfill for landfill disposal.
实施例2Example 2
某企业主要生产各种自然生态仿真花艺产品，生产过程中会产生大量的染色废水。该废水含有多种树脂胶液、有机无机染料和有机溶剂。试验所用染色废水的颜色为深棕红色，CODcr约为2000mg/L，BOD5约为30mg/L，色度约为800倍，SS约为1500mg/L，pH约为6.2。该废水色度高，悬浮物多，有机物含量高，可生化性差(BOD5/CODcr<0.3)。采用如图1所示的组合工艺对该废水进行处理。An enterprise mainly produces various natural ecological simulation flower art products, and a large amount of dyeing wastewater will be generated during the production process. The wastewater contains various resin glues, organic and inorganic dyes and organic solvents. The color of dyeing wastewater used in the test is dark brown red, CODcr is about 2000mg/L, BOD5 is about 30mg/L, chroma is about 800 times, SS is about 1500mg/L, and pH is about 6.2. The wastewater has high chroma, high suspended solids, high content of organic matter, and poor biodegradability (BOD5/CODcr<0.3). The waste water is treated by the combined process shown in Figure 1.
首先将车间废水收集在调节池，与来自污泥浓缩池的上清液和污泥压滤机的压滤液在调节池中进行混合，对废水的水量进行调节并均质，废水经过调节池后由泵提升向气浮池，废水在进入气浮之前，由盐析剂添加装置向气浮进水管里投加氯化钠或海水，经管道混合器盐析反应后的废水后，进入气浮池的混合区。气浮池单元运行时，启动空压机和回流泵，待气浮池的水面产生溶气水后，启动废水泵，废水进入气浮池的充气段，废水中的悬浮物，粘附在细微气泡上，当气浮池水面上的浮渣聚集到一定厚度以后，由刮泥机刮入集泥槽后排出至污泥浓缩池；经过气浮处理，废水颜色明显变浅，色度下降至200倍，CODcr下降至820mg/L左右。Firstly, the wastewater from the workshop is collected in the regulating tank, mixed with the supernatant from the sludge thickening tank and the filter press liquid of the sludge filter press in the regulating tank, and the water volume of the wastewater is adjusted and homogenized. After the wastewater passes through the regulating tank It is lifted by the pump to the air flotation tank. Before the wastewater enters the air flotation tank, sodium chloride or seawater is added to the air flotation inlet pipe by the salting-out agent addition device. mixed zone. When the air flotation pool unit is running, start the air compressor and the return pump. After the water surface of the air flotation pool produces dissolved air water, start the waste water pump, and the waste water enters the aeration section of the air flotation pool. The suspended matter in the waste water adheres to the fine air bubbles. When the scum on the water surface of the air flotation tank gathers to a certain thickness, it is scraped into the sludge collection tank by the mud scraper and discharged to the sludge concentration tank; after the air flotation treatment, the color of the wastewater is obviously lighter, and the chroma drops to 200 times, and the CODcr Dropped to about 820mg/L.
气浮出水自流进入中间水池，中间水池废水由泵提升至微电解反应池，微电解反应池内装有质量比为1:2的铁炭混合填料，所用铁为废铁刨花或铁粉，所用炭为活性炭。The air flotation water flows into the middle pool by itself, and the waste water in the middle pool is lifted by the pump to the micro-electrolysis reaction pool. The micro-electrolysis reaction pool is equipped with iron-carbon mixed filler with a mass ratio of 1:2. The iron used is scrap iron shavings or iron powder. The carbon is activated carbon.
微电解反应池处理废水过程中，利用自动加药装置投加稀硫酸，控制废水pH为3左右，用曝气机进行曝气，微电解反应90min后，出水自流至中和混凝反应池。In the process of treating wastewater in the micro-electrolysis reaction tank, the automatic dosing device is used to add dilute sulfuric acid to control the pH of the wastewater to about 3, and the aerator is used for aeration. After 90 minutes of micro-electrolysis reaction, the effluent flows to the neutralization coagulation reaction tank by itself.
在中和混凝反应池中，投加氢氧化钠溶液调节废水pH为8，搅拌15min后，加入助凝剂PAM，静止5min。In the neutralization coagulation reaction tank, add sodium hydroxide solution to adjust the pH of the wastewater to 8, stir for 15 minutes, add coagulant PAM, and stand still for 5 minutes.
取上清液测定COD、色度，经过上述工艺处理，COD和色度去除率分别达到92％和99％以上，出水CODcr约为160mg/L，色度约为2.5倍，该净化水已达到城市污水管网接纳要求。上述仅为本发明较佳的具体实施方式，但本发明的设计构思并不局限于此，凡利用本构思对本发明公开内容，进行直接导出或联想到的所有变形，均应包含在本发明的保护范围之内。Take the supernatant to measure COD and chroma. After the above-mentioned process, the removal rates of COD and chroma are over 92% and 99% respectively, the effluent CODcr is about 160mg/L, and the chroma is about 2.5 times. Acceptance requirements for urban sewage pipe network. The above is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all deformations that are directly derived or associated with the disclosure of the present invention by using this concept should be included in the scope of the present invention. within the scope of protection.
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