CN1125785C - Process for purifying floated algin and waste Ca solution in algin factory - Google Patents
Process for purifying floated algin and waste Ca solution in algin factory Download PDFInfo
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- CN1125785C CN1125785C CN 01117598 CN01117598A CN1125785C CN 1125785 C CN1125785 C CN 1125785C CN 01117598 CN01117598 CN 01117598 CN 01117598 A CN01117598 A CN 01117598A CN 1125785 C CN1125785 C CN 1125785C
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- Prior art keywords
- waste
- alginate
- factory
- water
- algin
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- 235000010443 alginic acid Nutrition 0.000 title claims abstract description 20
- 229920000615 alginic acid Polymers 0.000 title claims abstract description 20
- 239000002699 waste material Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000002351 wastewater Substances 0.000 claims abstract description 19
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229940072056 alginate Drugs 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011575 calcium Substances 0.000 claims abstract description 12
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 12
- 238000007667 floating Methods 0.000 claims abstract description 12
- 238000005189 flocculation Methods 0.000 claims abstract description 9
- 230000016615 flocculation Effects 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 241000512259 Ascophyllum nodosum Species 0.000 description 4
- 239000000648 calcium alginate Substances 0.000 description 4
- 235000010410 calcium alginate Nutrition 0.000 description 4
- 229960002681 calcium alginate Drugs 0.000 description 4
- OKHHGHGGPDJQHR-YMOPUZKJSA-L calcium;(2s,3s,4s,5s,6r)-6-[(2r,3s,4r,5s,6r)-2-carboxy-6-[(2r,3s,4r,5s,6r)-2-carboxylato-4,5,6-trihydroxyoxan-3-yl]oxy-4,5-dihydroxyoxan-3-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylate Chemical compound [Ca+2].O[C@@H]1[C@H](O)[C@H](O)O[C@@H](C([O-])=O)[C@H]1O[C@H]1[C@@H](O)[C@@H](O)[C@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@H](O2)C([O-])=O)O)[C@H](C(O)=O)O1 OKHHGHGGPDJQHR-YMOPUZKJSA-L 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000000661 sodium alginate Substances 0.000 description 3
- 235000010413 sodium alginate Nutrition 0.000 description 3
- 229940005550 sodium alginate Drugs 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000000783 alginic acid Substances 0.000 description 1
- 229960001126 alginic acid Drugs 0.000 description 1
- 150000004781 alginic acids Chemical class 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 235000011148 calcium chloride Nutrition 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 150000004804 polysaccharides Chemical class 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
一种净化褐藻胶厂的漂浮残渣和废钙水的方法，其特征是将褐藻胶厂含漂浮残渣的废水与絮凝后的废钙水和/或脱钙废水混合进行反应，过滤除去生成的絮凝混合物。本发明的方法能使褐藻胶厂排放的废渣废水得到治理，符合环保的要求，以废治废，并且废渣得到了充分利用。A method for purifying floating residues and waste calcium water from an alginate factory, characterized in that the waste water containing floating residues from the alginate factory is mixed with flocculated waste calcium water and/or decalcified waste water for reaction, and the generated flocculation is removed by filtration mixture. The method of the invention can control the waste residue wastewater discharged from the alginate factory, meet the requirements of environmental protection, treat waste with waste, and fully utilize the waste residue.
Description
本发明涉及一种废水废渣的处理方法，特别是涉及一种净化褐藻胶厂的漂浮残渣和废钙水的方法。The invention relates to a method for treating waste water and waste residue, in particular to a method for purifying floating residue and waste calcium water in alginate factories.
目前在褐藻胶厂中，将海带在70℃下加碳酸钠消化，使海带中水不溶性的褐藻酸盐进一步转化为水溶性的褐藻酸钠，消化后，得到粘稠的褐藻酸钠泥状物，其中含有大量不溶性残渣等杂质，生产中常采用稀释沉降或漂浮、过滤等工艺将其分出。但海带消化后的胶液粘稠，浓度高，直接从中除去残渣等杂质非常困难，通常用100-150倍的水冲稀，冲稀后的胶液，通过机械混气，静置后胶液与残渣等杂质分离，比重小的漂到上面，比重大的沉到下面，含漂浮残渣的废水(pH＝9-10)被排放掉，因而严重污染了环境。在褐藻胶的生产中，过滤后的胶液，普遍采用CaCl2作为絮凝剂，使褐藻酸钠转化成褐藻酸钙，从溶液中分离出来，达到精制的目的，絮凝后的大量废钙水含有的CaCl2HCI也同废水一起被排掉，也对环境造成巨大的污染。此外在生产中将褐藻酸钙用盐酸脱钙，转变成褐藻酸，一般采用二次脱钙，第一次脱钙后的废水的PH大约为3，第二次脱钙后的废水的PH为1.5-2，工厂生产时，第一次的脱钙后的废水被排放，也对环境造成了巨大的污染。上述三种污染源，对生态环境构成了巨的的危害，因此褐藻胶厂解决废水污染环境的问题势在必行。At present, in the alginate factory, the kelp is digested with sodium carbonate at 70°C to further convert the water-insoluble alginate in the kelp into water-soluble sodium alginate. After digestion, a viscous sodium alginate mud is obtained , which contains a large amount of impurities such as insoluble residues, which are often separated by dilution, sedimentation, floating, filtration and other processes in production. However, the glue after digestion of kelp is viscous and has a high concentration. It is very difficult to directly remove impurities such as residues from it. Usually, it is diluted with 100-150 times of water. Separated from impurities such as residues, those with a small specific gravity float to the top, and those with a large specific gravity sink to the bottom, and the waste water (pH=9-10) containing floating residues is discharged, thus seriously polluting the environment. In the production of alginate, CaCl2 is generally used as a flocculant for the filtered gelatin to convert sodium alginate into calcium alginate and separate it from the solution to achieve the purpose of refining. A large amount of waste calcium water after flocculation contains The CaCl 2 HCI is also discharged together with the waste water, which also causes huge pollution to the environment. In addition, in production, calcium alginate is decalcified with hydrochloric acid and converted into alginic acid. Generally, secondary decalcification is used. The pH of the wastewater after the first decalcification is about 3, and the pH of the wastewater after the second decalcification is 1.5-2, when the factory is in production, the first decalcified wastewater is discharged, which also causes huge pollution to the environment. The above three sources of pollution constitute a huge hazard to the ecological environment, so it is imperative for alginate factories to solve the problem of wastewater polluting the environment.
本发明的目的是提供一种净化褐藻胶厂的漂浮残渣和废钙水的方法，它能解决上述对环境污染的问题。The purpose of the present invention is to provide a method for purifying the floating residue and waste calcium water of alginate plant, which can solve the above-mentioned problems of environmental pollution.
一种净化褐藻胶厂的漂浮残渣和废钙水的方法，其特征是将褐藻胶厂含漂浮残渣的废水与絮凝后的废钙水和/或脱钙废水混合进行反应，过滤除去生成的絮凝混合物。A method for purifying floating residues and waste calcium water from an alginate factory, characterized in that the waste water containing floating residues from the alginate factory is mixed with flocculated waste calcium water and/or decalcified waste water for reaction, and the generated flocculation is removed by filtration mixture.
本发明的方法能使褐藻胶厂排放的废渣废水得到治理，符合环保的要求，以废治废，并且废渣得到了充分利用。The method of the invention can control the waste residue wastewater discharged from the alginate factory, meet the requirements of environmental protection, treat waste with waste, and fully utilize the waste residue.
下面通过实施例说明本发明。The present invention is illustrated by the following examples.
取褐藻胶厂的漂浮残渣液1吨，其PH约为9.5，主要成份有0.1-4％的褐藻胶、未消化完全的海带、纤维素、其他多糖和无机盐等等，加入絮凝后的废钙水0.4吨，生成褐藻酸钙等絮凝混合物，将其压榨脱水，得到含水量约为60-90％的褐藻酸钙絮凝混合物。经处理后排放的废水中已无残渣，其COD为150mg/升、BOD为60mg/升、PH为6-9，符合环保的要求。Take 1 ton of floating residue liquid from the alginate factory, its pH is about 9.5, the main components are 0.1-4% alginate, undigested kelp, cellulose, other polysaccharides and inorganic salts, etc., add the waste after flocculation 0.4 tons of calcium water to generate flocculation mixtures such as calcium alginate, which are pressed and dehydrated to obtain calcium alginate flocculation mixtures with a water content of about 60-90%. There is no residue in the discharged wastewater after treatment, its COD is 150mg/liter, BOD is 60mg/liter, and pH is 6-9, which meets the requirements of environmental protection.
本实施例中絮凝后的废钙水可以改用脱钙水或者同时用这两种废水，只要其含水量钙的当量数与漂浮残渣的废水中的褐藻胶的当量数相同即可。The waste calcium water after flocculation in this embodiment can be replaced by decalcified water or these two kinds of waste water can be used at the same time, as long as the equivalent number of calcium in the water content is the same as the equivalent number of alginate in the waste water with floating residues.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01117598 CN1125785C (en) | 2000-12-19 | 2001-04-25 | Process for purifying floated algin and waste Ca solution in algin factory |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00129425 | 2000-12-19 | ||
| CN00129425.3 | 2000-12-19 | ||
| CN 01117598 CN1125785C (en) | 2000-12-19 | 2001-04-25 | Process for purifying floated algin and waste Ca solution in algin factory |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1359858A CN1359858A (en) | 2002-07-24 |
| CN1125785C true CN1125785C (en) | 2003-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01117598 Expired - Fee Related CN1125785C (en) | 2000-12-19 | 2001-04-25 | Process for purifying floated algin and waste Ca solution in algin factory |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870528B (en) * | 2010-05-27 | 2011-11-02 | 中国水产科学研究院黄海水产研究所 | Dibasic precipitation method for treating calcium-containing wastewater in phaeophyceae industry |
| CN102745841B (en) * | 2012-05-25 | 2013-10-09 | 中国水产科学研究院黄海水产研究所 | Novel brown algae chemical waste calcium water recycling process |
| CN103058429B (en) * | 2013-02-04 | 2014-05-14 | 中国水产科学研究院黄海水产研究所 | New process for comprehensively utilizing brown alga chemical calcium wastewater |
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- 2001-04-25 CN CN 01117598 patent/CN1125785C/en not_active Expired - Fee Related
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| CN1359858A (en) | 2002-07-24 |
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