CN107089735A - 一种养殖污水脱色方法 - Google Patents
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- 238000002845 discoloration Methods 0.000 title claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 32
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 28
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Chemical compound [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims abstract description 23
- 229940056319 ferrosoferric oxide Drugs 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 3
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- 239000007787 solid Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims 2
- 230000035484 reaction time Effects 0.000 claims 1
- 239000006228 supernatant Substances 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 238000004042 decolorization Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 239000005416 organic matter Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
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- 230000001105 regulatory effect Effects 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
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- 241001465754 Metazoa Species 0.000 description 1
- 229910004882 Na2S2O8 Inorganic materials 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- QFYUAKPQIZIUPT-UHFFFAOYSA-N [Ca].ClO Chemical compound [Ca].ClO QFYUAKPQIZIUPT-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000011953 bioanalysis Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/70—Treatment of water, waste water, or sewage by reduction
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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Abstract
本发明公开了一种养殖污水脱色方法，包括以下过程，首先将经生化处理的污水调节PH到3~4，然后在调节PH后的污水中加入四氧化三铁和过硫酸钠，此时过硫酸钠和四氧化三铁使污水中的有机物的显色基团和助色基团发生化学反应，生成CO2和H2O。采用上述方法处理生化处理后的养殖污水，可使养殖污水的色度下降到20~30PCU，脱色率达到90%，同时，也使生化处理后的养殖污水的TOC（总有机碳含量）明显下降。
Description
技术领域
本发明涉及一种化学氧化法处理养殖污水出水的养殖污水脱色方法。
背景技术
养殖污水主要来自于规模化养殖过程中猪粪便、猪尿及猪圈冲洗水。经过生物处理的污水，污水的污染物含量基本达标，但处理后的污水的色度较深、可生化性差，直接排放至受纳水体，会造成感官的不适和环境的污染。从目前应用的污水处理技术上说，能有效去除污水色度的方法有吸附法、混凝法、生物法、膜分离法、化学氧化法一级电絮凝法等。其中化学氧化法具有工艺成熟、成本低、处理效率高、质量好。化学氧化脱色的原理是利用氧化剂破坏污水中的显色物质的不饱和基团以及发色基团而达到脱色目的。具有强烈氧化性的脱色剂还具有分解显色物质的作用，达到彻底脱色的目的。因此化学氧化法可应用于难以利用其它方法脱色的污水脱色处理。但目前化学氧化法使用的脱色剂主要成份为次氯酸钙、次氯酸钠、次氯酸等，因此经过脱色后的污水虽然色度低，但水质含有少量的活性氯，而活性氯对生物细胞具有强烈毒性，能够危害水生植物和动物，并威胁到人类的健康。
发明内容
本发明是为了克服当前脱色技术产生的活性氯或脱色后产生的大量污泥，采用一种脱色效率高、产生污泥量少、脱色试剂可重复使用的脱色剂，对养殖污水出水的处理脱色效率高、产泥量少、副产物少的养殖污水脱色方法。
本发明的技术方案是：一种养殖污水脱色方法，是采用化学氧化法对养殖污水出水脱色的方法，其特征在于：经生物技术处理过的污水用泵输送入调节池中，调节池中调节污水的PH至3-4；调节池的污水用泵输送入脱色池中，脱色池加入适量脱色剂；脱色池处理过的污水用泵输送入调节池中，调节池中调节污水的PH至中性；调节池中的污水用泵输送入澄清池中，静置1-2h，排出清水，清水的色度小于50。
所述脱色剂为工业级纯度过硫酸钠（Na2S2O8）和工业级四氧化三铁（Fe3O4）。
调节池中污水PH的调节，采用1M的稀硫酸溶液和1M的氢氧化钠溶液。
脱色池中过硫酸钠的投加量为9kg/T污水，四氧化三铁的投加量为40kg/T污水。
本发明系统的突出优点是在系统的污水中加入过硫酸钠和四氧化三铁，通过化学反应把污水中呈溶解状态的无机和有机物氧化或还原成无害的化合物H2O、CO2和无机盐等，转化成容易与水分离的物质形态，破坏其发色基团和助色基团，从而实现污染物的去除、脱色和无害化。同时，处理效果良好，反应产物无毒无害，不需进行二次处理;处理费用合理；操作性好，在常温和较宽的pH值范围内具有较快的反应速度；与前后处理工艺搭配衔接方便,是污水深度处理的理想工艺。本发明采用非均相反应体系，四氧化三铁可以重复利用，从而节省加药量，降低运行费用。
附图说明
图1本发明所述的养殖污水脱色方法的设备、工艺流程图。
具体实施方式
本发明的养殖污水脱色方法采用的设备及工艺流程如图1所示：
污水通过泵从污水池1输送入一号调节池2同时加入稀硫酸溶液，调节其PH至3-4；一号调节池2的水通过泵从池底输送入一号脱色池3中，同时加入四氧化三铁和过硫酸钠，同时桨叶进行搅拌；一号脱色池3的水从池底通过泵自流进入一号澄清池4中，进行固液分离；污水的脱色为连续处理。
当生化出水色度为500~600PCU时，经本发明方法处理后，色度下降至20-30PCU，脱色率达到94%~97%，同时也使生化出水得TOC（总有机碳含量）有明显下降，如下表所示：
| 项目 | 色度(PCU) | TOC(mg/L) |
| 处理前 | 528 | 88 |
| 处理后 | 52 | 51 |
| 去除率 | 96% | 42% |
本发明的突出优点是在系统的污水中加入过硫酸钠和四氧化三铁，通过化学反应把污水中呈溶解状态的无机和有机物氧化或还原成无害的化合物H2O、CO2和无机盐等，转化成容易与水分离的物质形态，破坏其发色基团和助色基团，从而实现污染物的去除、脱色和无害化；同时，处理效果良好，反应产物无毒无害，不需进行二次处理;处理费用合理；操作性好，在常温和较宽的pH值范围内具有较快的反应速度；与前后处理工艺搭配衔接方便,是污水深度处理的理想工艺。本发明采用非均相反应体系，四氧化三铁可以重复利用，从而节省加药量，降低运行费用。
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并加以实施，并不能以此限制本发明的保护范围，凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围内。
Claims (6)
1.一种养殖污水脱色方法，其特征在于，包括以下过程:首先将污水PH调至3-4，然后在污水中加入四氧化三铁，再加入过硫酸钠，进行搅拌，反应一段时间后，将污水PH调至中性，再进行固液分离，将上清液排放。
2.如权利1要求所述的养殖污水脱色方法，其特征在于，所述的污水为养猪场经生化处理的污水。
3.如权利2要求所述的养殖污水脱色方法，其特征在于，所述的四氧化三铁的投加量为40kg/t污水，过硫酸钠的投加量为9kg/t污水。
4.如权利3要求所述的养殖污水脱色方法，其特征在于，所述的四氧化三铁和过硫酸钠投入污水反应时间为12-36h。
5.如权利1要求所述的养殖污水脱色方法，其特征在于，所述的四氧化三铁的纯度为工业级，投加方式为直接投加，进行桨叶搅拌。
6.如权利1要求所述的养殖污水脱色方法，其特征在于，所述的过硫酸钠的纯度为工业级，投加方式为直接投加，进行桨叶搅拌。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835202A (zh) * | 2019-10-23 | 2020-02-25 | 东珠生态环保股份有限公司 | 一种湿地生态系统的修复方法 |
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|---|---|---|---|---|
| KR100188169B1 (ko) * | 1995-08-29 | 1999-06-01 | 박원훈 | 촉매를 이용한 폐수의 화학적 산화 처리 방법 |
| US20140335602A1 (en) * | 2013-05-10 | 2014-11-13 | Innovative Environmental Technologies, Inc. | Chemical oxidation and biological attenuation process for the treatment of contaminated media |
| CN104437539A (zh) * | 2014-12-15 | 2015-03-25 | 武汉纺织大学 | 一种磁性oms-2催化剂及其降解有机污染物的应用 |
| CN106045152A (zh) * | 2016-07-08 | 2016-10-26 | 常州大学 | 一种纳米Fe3O4/Na2S2O8联合降解罗丹明B的方法 |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100188169B1 (ko) * | 1995-08-29 | 1999-06-01 | 박원훈 | 촉매를 이용한 폐수의 화학적 산화 처리 방법 |
| US20140335602A1 (en) * | 2013-05-10 | 2014-11-13 | Innovative Environmental Technologies, Inc. | Chemical oxidation and biological attenuation process for the treatment of contaminated media |
| CN104437539A (zh) * | 2014-12-15 | 2015-03-25 | 武汉纺织大学 | 一种磁性oms-2催化剂及其降解有机污染物的应用 |
| CN106045152A (zh) * | 2016-07-08 | 2016-10-26 | 常州大学 | 一种纳米Fe3O4/Na2S2O8联合降解罗丹明B的方法 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835202A (zh) * | 2019-10-23 | 2020-02-25 | 东珠生态环保股份有限公司 | 一种湿地生态系统的修复方法 |
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Effective date of registration: 20180108 Address after: Wuzhong District Wuzhong road in Suzhou city of Jiangsu province 215104 No. 1083 Stonelake glorious city building 75 room 503 Applicant after: Jiang Mina Address before: No. 588 Miyun Road, Yangpu District, Shanghai Applicant before: Shanghai Urban Pollution Control Engineering Research Center Co., Ltd. Applicant before: Suzhou Research Institute of Tongji University Applicant before: Suzhou Tongde Environmental Protection Technology Co., Ltd. |
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Effective date of registration: 20180522 Address after: No. 588 Miyun Road, Yangpu District, Shanghai Applicant after: Shanghai Urban Pollution Control Engineering Research Center Co., Ltd. Applicant after: Suzhou Research Institute of Tongji University Applicant after: Suzhou Tongde Environmental Protection Technology Co., Ltd. Address before: 215104 503 room, 75 Stone Lake Hua Town, 1083 Wuzhong Road, Wuzhong District, Suzhou, Jiangsu. Applicant before: Jiang Mina |
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Application publication date: 20170825 |