CN100534930C - Highly effective sterilization metallurgy sewage treatment method - Google Patents
Highly effective sterilization metallurgy sewage treatment method Download PDFInfo
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- CN100534930C CN100534930C CNB2007100620818A CN200710062081A CN100534930C CN 100534930 C CN100534930 C CN 100534930C CN B2007100620818 A CNB2007100620818 A CN B2007100620818A CN 200710062081 A CN200710062081 A CN 200710062081A CN 100534930 C CN100534930 C CN 100534930C
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 43
- 230000001954 sterilising effect Effects 0.000 title claims abstract description 40
- 239000010865 sewage Substances 0.000 title claims abstract description 31
- 238000005272 metallurgy Methods 0.000 title claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 44
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 31
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 31
- 239000003899 bactericide agent Substances 0.000 claims abstract description 23
- 230000001590 oxidative effect Effects 0.000 claims abstract description 23
- 238000010612 desalination reaction Methods 0.000 claims abstract description 12
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 10
- MGIYRDNGCNKGJU-UHFFFAOYSA-N isothiazolinone Chemical compound O=C1C=CSN1 MGIYRDNGCNKGJU-UHFFFAOYSA-N 0.000 claims description 7
- 238000005189 flocculation Methods 0.000 claims description 6
- 230000016615 flocculation Effects 0.000 claims description 6
- 241000242583 Scyphozoa Species 0.000 claims description 4
- 239000007900 aqueous suspension Substances 0.000 claims 1
- 238000011033 desalting Methods 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000000247 postprecipitation Methods 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 16
- 239000000126 substance Substances 0.000 abstract description 15
- 239000012528 membrane Substances 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 241000894006 Bacteria Species 0.000 description 17
- 244000005700 microbiome Species 0.000 description 10
- 239000005708 Sodium hypochlorite Substances 0.000 description 9
- 238000004062 sedimentation Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 210000000170 cell membrane Anatomy 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000000855 fungicidal effect Effects 0.000 description 2
- 239000000417 fungicide Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- VUWCWMOCWKCZTA-UHFFFAOYSA-N 1,2-thiazol-4-one Chemical class O=C1CSN=C1 VUWCWMOCWKCZTA-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000857 drug effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
一种高效杀菌的冶金污水处理方法，属废水处理技术领域，用于解决冶金污水处理过程中杀菌不彻底、影响反渗透正常运行的问题。特别之处是，该方法包括如下工序：A.回收污水，制取中水；B.氧化性杀菌剂一次杀菌；C.超滤处理及非氧化性杀菌剂二次杀菌；D.反渗透脱盐处理。本发明采用氧化性杀菌剂和非氧化性杀菌剂联合投加进行杀菌的方法，明显提高了杀菌效果。采用该方法能够保证反渗透系统的正常运行，延长反渗透的化学清洗周期，反渗透膜化学清洗周期由原来的一个月延长为六个月，每年可节约数目可观的化学清洗费用，大大降低了冶金污水处理的运行成本并减少清洗液的用量及清洗废液的排放对环境造成的污染。
A method for treating metallurgical sewage with high-efficiency sterilization belongs to the technical field of wastewater treatment, and is used to solve the problem of incomplete sterilization and affecting the normal operation of reverse osmosis in the process of metallurgical sewage treatment. In particular, the method includes the following steps: A. Recycling sewage and producing reclaimed water; B. Primary sterilization by oxidative bactericide; C. Ultrafiltration treatment and secondary sterilization by non-oxidative bactericide; D. Reverse osmosis desalination deal with. The invention adopts the method of jointly adding the oxidizing bactericide and the non-oxidizing bactericide to sterilize, which obviously improves the bactericidal effect. This method can ensure the normal operation of the reverse osmosis system, prolong the chemical cleaning cycle of the reverse osmosis membrane, and extend the chemical cleaning cycle of the reverse osmosis membrane from one month to six months, which can save a considerable amount of chemical cleaning costs every year, greatly reducing the Reduce the operating cost of metallurgical sewage treatment and reduce the amount of cleaning liquid and the pollution caused by the discharge of cleaning waste liquid to the environment.
Description
技术领域 technical field
本发明涉及一种水处理方法，特别是在冶金行业工业污水的处理及回收利用过程中，提高杀菌效果的方法，属于废水处理技术领域。The invention relates to a water treatment method, in particular to a method for improving the sterilization effect in the process of treatment and recycling of industrial sewage in the metallurgical industry, and belongs to the technical field of wastewater treatment.
背景技术 Background technique
水是重要且宝贵的资源，随着工业化进程的加快，水资源供求矛盾日益突出。冶金行业是用水大户，在生产过程中，一方面有大量的工业污水排放，对环境造成污染，另一方面又需要消耗大量的脱盐水，因此环境污染和水耗问题均十分突出。为缓解水资源的供求矛盾，近年来开始采用双膜法(超滤+反渗透)工艺技术处理冶金污水，使之达到循环使用的目的，其工艺流程见图1，它利用冶金污水做水源，以反渗透工艺为核心，经过超滤除去水源中的悬浮物、胶体物质、浊度物质、细菌、有机物使产水浊度小于1NTU、SDI小于3，再用高压泵打入反渗透膜组件，经反渗透膜组件水中97％的离子被滤出，从而制取脱盐水。按照现行工艺，在超滤运行时连续投加氧化性杀菌剂(次氯酸钠)进行杀菌，该工艺在运行过程中发现存在下列问题：由于冶金污水水质成份复杂，各项指标波动较大，细菌种类及数量较多，单用次氯酸钠杀菌方法不能满足反渗透的杀菌要求，致使在运行过程中中水对反渗透污染严重，化学清洗周期缩短，最短的不到一个月，严重影响了反渗透的正常运行。Water is an important and precious resource. With the acceleration of industrialization, the contradiction between supply and demand of water resources has become increasingly prominent. The metallurgical industry is a large water user. During the production process, on the one hand, there is a large amount of industrial sewage discharge, which pollutes the environment. On the other hand, it needs to consume a large amount of desalted water. Therefore, the problems of environmental pollution and water consumption are very prominent. In order to alleviate the contradiction between the supply and demand of water resources, in recent years, the double-membrane method (ultrafiltration + reverse osmosis) technology has been used to treat metallurgical sewage, so as to achieve the purpose of recycling. The process flow is shown in Figure 1. It uses metallurgical sewage as a water source. With the reverse osmosis process as the core, the suspended solids, colloidal substances, turbidity substances, bacteria, and organic substances in the water source are removed through ultrafiltration to make the turbidity of the product water less than 1NTU and SDI less than 3, and then pumped into the reverse osmosis membrane module with a high-pressure pump. 97% of the ions in the water are filtered out through the reverse osmosis membrane module, thereby producing desalinated water. According to the current process, the oxidative bactericide (sodium hypochlorite) is continuously added for sterilization during the operation of ultrafiltration. During the operation of this process, the following problems are found: due to the complex composition of metallurgical wastewater, various indicators fluctuate greatly, and the types of bacteria and The quantity is large, and the sterilization method of sodium hypochlorite alone cannot meet the sterilization requirements of reverse osmosis, resulting in serious pollution of reverse osmosis to reclaimed water during operation, shortening the chemical cleaning cycle, the shortest is less than one month, seriously affecting the normal operation of reverse osmosis .
发明内容 Contents of the invention
本发明所要解决的问题是克服现有技术的缺陷而提供一种高效杀菌的冶金污水处理方法，该方法利用氧化性杀菌剂和非氧化性杀菌剂联合投加，提高杀菌效果，从而保证反渗透的正常运行。The problem to be solved by the present invention is to overcome the defects of the prior art and provide a method for treating metallurgical sewage with high-efficiency sterilization. of normal operation.
本发明所述方法是由以下技术方案解决的：The method of the present invention is solved by the following technical solutions:
一种高效杀菌的冶金污水处理方法，其特别之处是：所述方法按如下工序进行：A metallurgical wastewater treatment method with high efficiency sterilization, which is special in that: the method is carried out according to the following procedures:
A.回收污水，制取中水：取冶金行业下水道的污水经絮凝、沉淀后达到出水悬浮物小于100mg/l的中水要求；A. Recycle sewage and produce reclaimed water: take sewage from metallurgical industry sewers, and after flocculation and sedimentation, meet the reclaimed water requirement that the effluent suspended matter is less than 100mg/l;
B.一次杀菌：将上述中水经过1mm格栅过滤器过滤，投加氧化性杀菌剂进行杀菌消毒，投加量为2～3mg/l；B. One-time sterilization: filter the above-mentioned reclaimed water through a 1mm grid filter, and add an oxidizing bactericide for sterilization and disinfection, and the dosage is 2-3mg/l;
C.超滤处理及二次杀菌：将步骤B中水经超滤处理后，达到SDI小于3，在超滤的产水母管投加非氧化性杀菌剂进行二次杀菌，投加时间为每5～8天一次，每次投加60分钟，投加量为30～50mg/l；C. Ultrafiltration treatment and secondary sterilization: After the water in step B is subjected to ultrafiltration treatment, the SDI is less than 3, and a non-oxidizing bactericide is added to the ultrafiltration water-producing mother pipe for secondary sterilization. Once every 5 to 8 days, each dosage is 60 minutes, and the dosage is 30 to 50 mg/l;
D.反渗透脱盐处理：经超滤及二次杀菌处理后的水进入反渗透装置进行脱盐处理。D. Reverse osmosis desalination treatment: After ultrafiltration and secondary sterilization, the water enters the reverse osmosis device for desalination treatment.
上述高效杀菌的冶金污水处理方法，所述一次杀菌处理的氧化性杀菌剂为次氯酸钠，二次杀菌处理的非氧化性杀菌剂为异噻唑啉酮。In the metallurgical sewage treatment method with high-efficiency sterilization, the oxidizing bactericide for the primary sterilization treatment is sodium hypochlorite, and the non-oxidizing bactericide for the secondary sterilization treatment is isothiazolinone.
上述高效杀菌的冶金污水处理方法，所述非氧化性杀菌剂采用冲击式投加方式。In the method for treating metallurgical sewage with high-efficiency sterilization, the non-oxidizing bactericide adopts the impact-type dosing method.
本发明方法针对冶金污水水质成份复杂、细菌种类及数量较多、现有杀菌方法不能满足反渗透杀菌要求的问题进行了改进，它采用氧化性杀菌剂和非氧化性杀菌剂联合投加进行杀菌的方法，明显提高了杀菌效果。采用该方法能够保证反渗透系统的正常运行，延长反渗透的化学清洗周期，降低反渗透膜的清洗费用，减少清洗液的用量及清洗废液的排放对环境造成的污染。试运行表明，采用本发明方法后，反渗透膜化学清洗周期由原来的1个月延长为五～六个月，每年可节约数目可观的化学清洗费用，大大降低了冶金污水处理的运行成本。The method of the present invention improves the problems that the metallurgical sewage has complex water quality components, many types and quantities of bacteria, and the existing sterilization methods cannot meet the requirements of reverse osmosis sterilization. method, significantly improved the bactericidal effect. The method can ensure the normal operation of the reverse osmosis system, prolong the chemical cleaning cycle of the reverse osmosis, reduce the cleaning cost of the reverse osmosis membrane, reduce the consumption of cleaning liquid and the pollution caused by the discharge of cleaning waste liquid to the environment. The test operation shows that after adopting the method of the present invention, the chemical cleaning cycle of the reverse osmosis membrane is extended from the original one month to five to six months, which can save a considerable amount of chemical cleaning costs every year and greatly reduce the operating cost of metallurgical sewage treatment.
附图说明 Description of drawings
图1为现有技术的工艺流程图Fig. 1 is the process flow chart of prior art
图2为本发明的工艺流程图。Fig. 2 is a process flow diagram of the present invention.
具体实施方式 Detailed ways
参看图2，以下结合附图对本发明工艺方法进一步详述：Referring to Fig. 2, below in conjunction with accompanying drawing, process of the present invention is described in further detail:
本发明方法适于冶金行业处理工业污水使用，主要特点在于采用氧化性杀菌剂(次氯酸钠)和非氧化性杀菌剂(异噻唑啉酮)联合投加进行杀菌，以保证反渗透的正常稳定运行，其主要步骤的作用如下：The method of the present invention is suitable for use in the treatment of industrial sewage in the metallurgical industry. The main feature is that the oxidative bactericide (sodium hypochlorite) and the non-oxidative bactericide (isothiazolinone) are jointly added for sterilization, so as to ensure the normal and stable operation of reverse osmosis. Its main steps are as follows:
1.回收污水，制取中水：取冶金行业下水道的污水入沉淀池，投加絮凝剂硫酸亚铁或PAC，使回收的污水中的细小的悬浮物、胶体微粒絮凝成较大的颗粒而沉降，加入量根据回收污水的水质来调整。经絮凝、沉淀，使其出水悬浮物小于100mg/l。1. Recycle sewage and produce reclaimed water: take sewage from metallurgical industry sewer into sedimentation tank, add flocculant ferrous sulfate or PAC, so that fine suspended solids and colloidal particles in recovered sewage can be flocculated into larger particles. Settling, the amount added is adjusted according to the water quality of recycled sewage. After flocculation and precipitation, the suspended matter in the effluent is less than 100mg/l.
2.在中水处理过程中进行第一次杀菌：为保证超滤装置的正常运行，需在中水处理过程中用计量泵定量投加氧化性杀菌剂次氯酸钠进行杀菌消毒，投加量为2～3mg/l。次氯酸钠在水中迅速分解，其具体过程如下：2. Sterilize for the first time in the reclaimed water treatment process: In order to ensure the normal operation of the ultrafiltration device, it is necessary to use a metering pump to quantitatively add the oxidative bactericide sodium hypochlorite to sterilize and disinfect during the reclaimed water treatment process, and the dosage is 2 ~3 mg/l. Sodium hypochlorite decomposes rapidly in water, and the specific process is as follows:
NaCLO在水中会迅速分解成HCLONaCLO will quickly decompose into HCLO in water
NaCLO+H2O＝HCLO+NaOHNaCLO+ H2O =HCLO+NaOH
HCLO在水中会分解成H+和CLO- HCLO decomposes into H + and CLO- in water
NaCLO、HCLO、CLO-，的总合称为余氯(以mg/l计)，余氯的杀菌效率与未分解的HCLO的浓度成正比，HCLO比CLO-的杀菌效率高100倍，未解离HCLO的比例随PH值降低而增加(见表1)。CLO-是较弱的杀菌剂，因为它带有电荷，不易扩散进入细胞膜，而HCLO则可以较快进入细胞膜造成高毒性。The total of NaCLO, HCLO, and CLO - is called residual chlorine (in mg/l), the bactericidal efficiency of residual chlorine is proportional to the concentration of undecomposed HCLO, and the bactericidal efficiency of HCLO is 100 times higher than that of CLO - The proportion from HCLO increases with the decrease of pH value (see Table 1). CLO - is a weaker fungicide because it is charged and does not easily diffuse into the cell membrane, while HCLO can enter the cell membrane faster and cause high toxicity.
表1：HCLO、CLO-与PH值的关系Table 1: Relationship between HCLO, CLO - and pH value
在实际运行中反渗透系统设备内壁出现细菌、微生物污染，影响了系统的正常运行，缩短了反渗透的化学清洗周期(最短不到1个月)，冶金工业费水的PH≥7.5，这样难以保证杀菌效果。In actual operation, bacteria and microorganisms appear on the inner wall of reverse osmosis system equipment, which affects the normal operation of the system and shortens the chemical cleaning cycle of reverse osmosis (the shortest is less than 1 month). Guaranteed bactericidal effect.
3.超滤处理及再次杀菌：超滤的功能是去除中水中的生物污染物、颗粒物、胶体物质、浊度、细菌满足反渗透的进水要求。但由于超滤膜对在上道工序中未杀死细菌的截留率不能达到100％，未杀死细菌在水质复杂、水温较高的污水中繁殖很快，一些线形细菌会穿过膜丝及保安过滤器的滤芯，到达反渗透装置，污染膜系统。为保证下道工序反渗透系统得正常运行，采用计量泵在超滤产水母管冲击式投加非氧化性杀菌剂来保证杀菌效果。理论依据如下：3. Ultrafiltration treatment and re-sterilization: The function of ultrafiltration is to remove biological pollutants, particulate matter, colloidal substances, turbidity, and bacteria in reclaimed water to meet the water intake requirements of reverse osmosis. However, because the retention rate of ultrafiltration membranes for unkilled bacteria in the previous process cannot reach 100%, unkilled bacteria multiply rapidly in sewage with complex water quality and high water temperature, and some linear bacteria will pass through the membrane filaments and The filter element of the security filter reaches the reverse osmosis device and pollutes the membrane system. In order to ensure the normal operation of the reverse osmosis system in the next process, a metering pump is used to impact-dosing a non-oxidizing bactericide in the ultrafiltration jellyfish tube to ensure the bactericidal effect. The theoretical basis is as follows:
非氧化杀菌剂异噻唑啉酮的杀菌机理：通过断开细菌的键而起杀生作用。异噻唑啉酮与微生物接触后，能迅速地抑制其生长。并且这种抑制过程是不可逆的，从而导致细菌或微生物的死亡。它能迅速穿透黏附在设备表面上的生物膜，对生物膜下的微生物进行有效的控制。并且在较宽的PH值范围内都有优良的杀生性能，药效持久，是水溶性的，能和一些药剂复配在一起。它能和NaCLO在水中彼此相容。The bactericidal mechanism of the non-oxidative bactericide isothiazolinone: it kills bacteria by breaking the bonds of bacteria. After contacting with microorganisms, isothiazolinones can rapidly inhibit their growth. And this inhibition process is irreversible, resulting in the death of bacteria or microorganisms. It can quickly penetrate the biofilm adhered to the surface of the equipment, and effectively control the microorganisms under the biofilm. And it has excellent biocidal performance in a wide range of pH value, long-lasting drug effect, water-soluble, and can be compounded with some drugs. It is compatible with NaCLO in water.
非氧化性杀菌剂采用冲击式投加方式，这是一种间断投加药剂的方法，它在短时间内投加大量药剂，该投加方式便于操作和检修，有利于控制药剂的投加浓度，能够保证杀菌效果。投药间隔时间根据水温变化进行调整，一般为5～8天一次，每次投加60分钟，投加量为30～50mg/l。The non-oxidizing fungicide adopts the impact dosing method, which is a method of discontinuous dosing, which can add a large amount of medicine in a short period of time. This dosing method is convenient for operation and maintenance, and is conducive to controlling the dosing concentration of the medicine. , can guarantee the bactericidal effect. The dosing interval is adjusted according to the change of water temperature, generally once every 5-8 days, each dosing takes 60 minutes, and the dosing amount is 30-50mg/l.
4.反渗透脱盐处理：经过二次杀菌后的超滤产水进入反渗透装置进行脱盐处理，其一级反渗透产水预脱盐水、二级反渗透产水脱盐水分别能满足不同的生产用水需要。4. Reverse osmosis desalination treatment: The ultrafiltration product water after secondary sterilization enters the reverse osmosis device for desalination treatment. Water needs.
以下提供几个实施例：Several examples are provided below:
实施例1：Example 1:
A.回收污水，制取中水：取冶金行业下水道的污水经絮凝、沉淀后达到出水悬浮物小于100mg/l的中水要求；A. Recycle sewage and produce reclaimed water: take sewage from metallurgical industry sewers, and after flocculation and sedimentation, meet the reclaimed water requirement that the effluent suspended matter is less than 100mg/l;
B.一次杀菌：将上述中水经过1mm格栅过滤器过滤，投加氧化性杀菌剂次氯酸钠进行杀菌消毒，主要作用抑制细菌、微生物的滋生。投加量为2mg/l。B. One-time sterilization: filter the above-mentioned reclaimed water through a 1mm grid filter, and add oxidizing bactericide sodium hypochlorite for sterilization and disinfection, the main function is to inhibit the growth of bacteria and microorganisms. The dosage is 2mg/l.
C.超滤处理及二次杀菌：将步骤B处理的中水经超滤处理后，达到SDI小于3，在超滤的产水母管投加非氧化性杀菌剂异噻唑啉酮进行二次杀菌，以降低反渗透进水中的细菌、微生物的含量延长反渗透的化学清洗周期。水温26℃，投加时间为每8天一次，每次投加60分钟，投加量为30mg/l，经超滤及二次杀菌处理后产水进入反渗透。C. Ultrafiltration treatment and secondary sterilization: After the reclaimed water treated in step B is subjected to ultrafiltration treatment, the SDI is less than 3, and a non-oxidative bactericide isothiazolinone is added to the ultrafiltration jellyfish tube for secondary sterilization , to reduce the content of bacteria and microorganisms in the reverse osmosis water and extend the chemical cleaning cycle of reverse osmosis. The water temperature is 26°C, the dosing time is once every 8 days, and the dosing time is 60 minutes each time, and the dosing amount is 30mg/l. After ultrafiltration and secondary sterilization, the produced water enters reverse osmosis.
D.反渗透脱盐处理：经超滤及二次杀菌处理后的水进入反渗透装置进行脱盐处理。D. Reverse osmosis desalination treatment: After ultrafiltration and secondary sterilization, the water enters the reverse osmosis device for desalination treatment.
实施例2：Example 2:
A.回收污水，制取中水：取冶金行业下水道的污水经絮凝、沉淀后达到出水悬浮物小于100mg/l的中水要求；A. Recycle sewage and produce reclaimed water: take sewage from metallurgical industry sewers, and after flocculation and sedimentation, meet the reclaimed water requirement that the effluent suspended matter is less than 100mg/l;
B.一次杀菌：将上述中水经过1mm格栅过滤器过滤，投加氧化性杀菌剂次氯酸钠进行杀菌消毒，主要作用抑制细菌、微生物的滋生。投加量为3mg/l。B. One-time sterilization: filter the above-mentioned reclaimed water through a 1mm grid filter, and add oxidizing bactericide sodium hypochlorite for sterilization and disinfection, the main function is to inhibit the growth of bacteria and microorganisms. The dosage is 3mg/l.
C.超滤处理及二次杀菌：将步骤B处理的中水经超滤处理后，达到SDI小于3，在超滤的产水母管投加非氧化性杀菌剂异噻唑啉酮进行二次杀菌，以降低反渗透进水中的细菌、微生物的含量延长反渗透的化学清洗周期。水温29℃，投加时间为每6天一次，每次投加60分钟，投加量为40mg/l，经超滤及二次杀菌处理后产水进入反渗透。C. Ultrafiltration treatment and secondary sterilization: After the reclaimed water treated in step B is subjected to ultrafiltration treatment, the SDI is less than 3, and a non-oxidative bactericide isothiazolinone is added to the ultrafiltration jellyfish tube for secondary sterilization , to reduce the content of bacteria and microorganisms in the reverse osmosis water and extend the chemical cleaning cycle of reverse osmosis. The water temperature is 29°C, the dosing time is once every 6 days, and the dosing time is 60 minutes each time, and the dosing amount is 40mg/l. After ultrafiltration and secondary sterilization, the produced water enters reverse osmosis.
D.反渗透脱盐处理：经超滤及二次杀菌处理后的水进入反渗透装置进行脱盐处理。D. Reverse osmosis desalination treatment: After ultrafiltration and secondary sterilization, the water enters the reverse osmosis device for desalination treatment.
实施例3：Example 3:
A.回收污水，制取中水：取冶金行业下水道的污水经絮凝、沉淀后达到出水悬浮物小于100mg/l的中水要求；A. Recycle sewage and produce reclaimed water: take sewage from metallurgical industry sewers, and after flocculation and sedimentation, meet the reclaimed water requirement that the effluent suspended matter is less than 100mg/l;
B.一次杀菌：将上述中水经过1mm格栅过滤器过滤，投加氧化性杀菌剂次氯酸钠进行杀菌消毒，主要作用抑制细菌、微生物的滋生。投加量为2.5mg/l。B. One-time sterilization: filter the above-mentioned reclaimed water through a 1mm grid filter, and add oxidizing bactericide sodium hypochlorite for sterilization and disinfection, the main function is to inhibit the growth of bacteria and microorganisms. The dosage is 2.5mg/l.
C.超滤处理及二次杀菌：将步骤B中水经超滤处理后，达到SDI小于3，在超滤的产水母管投加非氧化性杀菌剂异噻唑啉酮进行二次杀菌，以降低反渗透进水中的细菌、微生物的含量延长反渗透的化学清洗周期。水温31℃，投加时间为每5天一次，每次投加60分钟，投加量为50mg/l，经超滤及二次杀菌处理后产水进入反渗透。C. Ultrafiltration treatment and secondary sterilization: After the water in step B is treated by ultrafiltration, the SDI is less than 3, and the non-oxidative bactericide isothiazolinone is added to the ultrafiltration water-producing mother pipe for secondary sterilization to Reduce the content of bacteria and microorganisms in reverse osmosis water and prolong the chemical cleaning cycle of reverse osmosis. The water temperature is 31°C, the dosing time is once every 5 days, and the dosing time is 60 minutes each time, and the dosing amount is 50mg/l. After ultrafiltration and secondary sterilization, the produced water enters reverse osmosis.
D.反渗透脱盐处理：经超滤及二次杀菌处理后的水进入反渗透装置进行脱盐处理。D. Reverse osmosis desalination treatment: After ultrafiltration and secondary sterilization, the water enters the reverse osmosis device for desalination treatment.
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| CN102698605A (en) * | 2012-06-06 | 2012-10-03 | 山东招金膜天有限责任公司 | Dry-state preservation method for ultra-filtration membrane component |
| CN106007059A (en) * | 2016-06-22 | 2016-10-12 | 成都丽雅纤维股份有限公司 | Reverse osmosis production method for demineralized water and device |
| CN112624391A (en) * | 2020-11-13 | 2021-04-09 | 浙江恒洋热电有限公司 | Economic raw water sterilization and algae removal process |
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| 双膜法处理工艺在冶金污水回用系统的应用. 董金冀等.中国工程科学，第8卷第6期. 2006 * |
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