CN105523664A - Algin production wastewater pretreatment method - Google Patents

Algin production wastewater pretreatment method Download PDF

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Publication number
CN105523664A
CN105523664A CN201510992672.XA CN201510992672A CN105523664A CN 105523664 A CN105523664 A CN 105523664A CN 201510992672 A CN201510992672 A CN 201510992672A CN 105523664 A CN105523664 A CN 105523664A
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CN
China
Prior art keywords
waste water
water
wastewater
iodine
flushing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510992672.XA
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Chinese (zh)
Inventor
刘治华
王顺刚
徐展
何焱
王留生
陈鹏
刘远涛
孟祥媛
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Shandong Environmental Protection Industry Co Ltd
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Shandong Environmental Protection Industry Co Ltd
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Priority to CN201510992672.XA priority Critical patent/CN105523664A/en
Publication of CN105523664A publication Critical patent/CN105523664A/en
Pending legal-status Critical Current

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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
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention provides an algin production wastewater pretreatment method. The method comprises the following steps: 1, pretreating waste calcium water: pumping the waste calcium water into a waste calcium water equalizing tank, carrying out aeration pretreatment on the waste calcium water, adding a flocculating agent to the aeration pretreated wastewater, mixing above materials until uniformity, and standing the obtained mixture for precipitating; 2, pretreating iodine extraction wastewater: adding an oxidant accounting for 0.01-0.05% of the weight of iodine-containing wastewater to the iodine-containing wastewater, and mixing above materials until uniformity to oxidize reduction substances residual in the iodine-containing wastewater; and 3, pretreating flushing wastewater: carrying out solid-liquid separation on the flushing wastewater through a solid-liquid separator, separating out obtained solids, allowing separation treated water to flow to a flushing wastewater equalizing tank, and carrying out aeration pretreatment on the flushing wastewater to remove formaldehyde in the flushing wastewater.

Description

A kind of pretreatment process of algin production waste water
Technical field:
The invention belongs to brown alga chemical industry wastewater processing technology, especially a kind of pretreatment process of algin production waste water.
Background technology:
Brown alga chemical industry is one of important industry in seaweed chemical industry.The algin annual output of China about 30,000 tons, occupies first place in the world.Algin mainly extracts from the phaeophyta such as sea-tangle, bulk kelp plant, China's sea-tangle aboundresources, the main path of sea-tangle comprehensive utilization that to take sea-tangle as deep processed products such as raw material production sodium alginate, iodine and N.F,USP MANNITOL be.In recent decades, the extraction process of sodium alginate has achieved very large improvement, and application is also more and more extensive, extracts sodium alginate and mainly adopts following several method: (1) acid cure-acidization from sea-tangle; (2) calcium coagulates-acidization; (3) calcium coagulates-ion exchange method; (4) enzymolysis process.But the current technology power consumption of industrial abstract sodium alginate is higher, and it is embodied in high water volume, high current consumption and high consumption of coal, often produces the 1 ton of coupling such as sodium alginate and iodine product, need consume fresh water more than 1000 ton and 50 tons, coal, electric 3000kwh.For the sea-tangle cortex removed in product need use a large amount of fresh water to dilute, thus create a large amount of waste water containing high COD, it mainly comprises: 1) waste Ca water; 2) iodine extracts waste water; 3) flushing waste water.Administer very difficult, directly discharge and serious environment pollution.Many scholars have carried out a series of research to TREATMENT OF ALGIN WASTEWATER WITH, as " a kind of seaweed chemical produce in wastewater recycling method " (CN200710116304), " process of algin production waste water and the processing method of circulation recover zero discharge " (ZL200610069057), " a kind of purify the floating residue of algin of algin factory and the method for waste Ca water " (CN1125785C).At present, the improvement of algin production waste water is directly discharged mostly after aeration biochemical process, waste water after process does not often reach discharge index, thus cause environmental pollution, and the consumption of the electric power of its equipment for the treatment of process is larger at present, cause water treatment costly, be difficult to wide popularization and application in practice.
Summary of the invention:
The object of the invention is, in order to overcome the deficiency that in prior art, equipment installation energy consumption is large, working cost is higher, to provide a kind of pretreatment process of algin production waste water.
Object of the present invention realizes by following technical measures:
The method is carried out as follows:
A, waste Ca water pre-treatment: first waste Ca water pump is entered waste Ca water equalizing tank, then carry out aeration pre-treatment to waste Ca water, then add flocculation agent in the pretreated waste water of aeration, and mixing, staticly settles;
B, iodine extract Wastewater Pretreatment: to containing the oxygenant added in iodine waste water containing iodine waste water weight 0.1-0.5 ‰, mix, containing reducing substances residual in iodine waste water (as I -, SO 3 2-deng) oxidized;
C, flushing waste water pre-treatment: first flushing waste water is flowed through solid-liquid separator and carry out solid-liquid separation, solids is separated, the water after separating treatment flows into flushing waste water equalizing tank, then carries out aeration pre-treatment to flushing waste water, removes the formaldehyde in flushing waste water.
Object of the present invention also realizes by following technical measures:
Aeration pre-treatment described in a step adopts CO 2producer produces CO 2carry out aeration, the volumetric concentration of carbonic acid gas used is 40%-90%; After Air Exposure, Ca residual in water 2+form precipitation and be able to effective removal, decrease Ca 2+deposition on pipeline and treatment facility, reduces pipeline hydraulic loss, thus decreases the watt consumption of water treating equipment, reach energy-conservation object.
Aeration time described in a step is 50-70 minute; The polyacrylamide solution of described flocculation agent to be mass concentration be 0.5-1.5 ‰, add-on is the 0.5-1.5 ‰ of waste Ca water volume; Described sedimentation time is 20-40 minute.
The H of to be mass concentration the be 28-32% of the oxygenant described in b step 2o 2be oxidized, after oxide treatment, residual I -, SO 3 2-be fully oxidized Deng reducing substances, effectively reduce the organic loading of subsequent treatment process.
Solid-liquid separator described in step c is arc solid-liquid separator, and the solid substance not recycling value separated enters sludge drying pond, transports outward after sludge system process.
Present invention achieves the dual treatment of each production technique section waste water, enhance the pre-treatment measure of each stock waste water, processing efficiency is high, technology stability good, has embodied the associated treatment effect to Algin chemical wastewater treatment effect.Therefore the invention provides a kind of pre-treatment application method of Algin chemical wastewater.
Invention enhances Ca 2+pre-treatment, avoid Ca 2+fouling on pipeline and equipment, reduces along Cheng Shuitou and local head loss, thus decreases the watt consumption of water treating equipment, reaches energy-conservation object.Iodine of the present invention extracts Wastewater Pretreatment, selected oxygenant to be mass concentration be 30% H 2o 2, its treatment effect is good, consumption is few, noresidue.The method not only increases the pre-treatment efficiency of waste water, and alleviates the load of subsequent biochemical process, decreases hydraulic loss, reaches the object reducing processing cost.
Accompanying drawing illustrates:
Fig. 1 is the process flow sheet of the embodiment of the present invention.
Embodiment:
Embodiment 1:
The method is carried out as follows:
A, waste Ca water pre-treatment: first waste Ca water is pumped into waste Ca water equalizing tank, then adopt CO to waste Ca water 2producer produces CO 2carry out aeration pre-treatment 50 minutes, then add flocculation agent in the pretreated waste water of aeration, mixing, staticly settles 40 minutes; Described flocculation agent to be mass concentration be 0.5 ‰ polyacrylamide solution, add-on is 1.5 ‰ of waste Ca water volume; The volumetric concentration of carbonic acid gas used is 40%.
B, iodine extract Wastewater Pretreatment: to being the H of 28% containing the mass concentration added containing iodine waste water weight 0.1 ‰ in iodine waste water 2o 2oxygenant, mixing, oxidized containing reducing substances residual in iodine waste water;
C, flushing waste water pre-treatment: first flushing waste water is flowed through arc solid-liquid separator and carry out solid-liquid separation, solids is separated, water after separating treatment flows into flushing waste water equalizing tank, then carries out aeration pre-treatment to flushing waste water, removes the formaldehyde in flushing waste water.
Embodiment 2:
The method is carried out as follows:
A, waste Ca water pre-treatment: first waste Ca water is pumped into waste Ca water equalizing tank, then adopt CO to waste Ca water 2producer produces CO 2carry out aeration pre-treatment 70 minutes, then add flocculation agent in the pretreated waste water of aeration, mixing, staticly settles 20 minutes; Described flocculation agent to be mass concentration be 1.5 ‰ polyacrylamide solution, add-on is 0.5 ‰ of waste Ca water volume; The volumetric concentration of carbonic acid gas used is 90%.
B, iodine extract Wastewater Pretreatment: to being the H of 32% containing the mass concentration added containing iodine waste water weight 0.5 ‰ in iodine waste water 2o 2oxygenant, mixing, oxidized containing reducing substances residual in iodine waste water;
C, flushing waste water pre-treatment: first flushing waste water is flowed through arc solid-liquid separator and carry out solid-liquid separation, solids is separated, water after separating treatment flows into flushing waste water equalizing tank, then carries out aeration pre-treatment to flushing waste water, removes the formaldehyde in flushing waste water.
Embodiment 3:
The method is carried out as follows:
A, waste Ca water pre-treatment: first waste Ca water is pumped into waste Ca water equalizing tank, then adopt CO to waste Ca water 2producer produces CO 2carry out aeration pre-treatment 60 minutes, then add flocculation agent in the pretreated waste water of aeration, mixing, staticly settles 30 minutes; Described flocculation agent to be mass concentration be 1.0 ‰ polyacrylamide solution, add-on is 1.0 ‰ of waste Ca water volume; The volumetric concentration of carbonic acid gas used is 60%.
B, iodine extract Wastewater Pretreatment: to being the H of 30% containing the mass concentration added containing iodine waste water weight 0.8 ‰ in iodine waste water 2o 2oxygenant, mixing, oxidized containing reducing substances residual in iodine waste water;
C, flushing waste water pre-treatment: first flushing waste water is flowed through arc solid-liquid separator and carry out solid-liquid separation, solids is separated, water after separating treatment flows into flushing waste water equalizing tank, then carries out aeration pre-treatment to flushing waste water, removes the formaldehyde in flushing waste water.
Embodiment 4:
Certain marine biotechnology company limited, to produce algin and deep processed product thereof, its raw materials for production mainly sea-tangle, every day discharges factory effluent and is about 8000m 3, sewage directly enters sea after simple biochemical aeration.Along with the raising of sewage drainage standard, enterprise carries out upgrading to existing treatment system, realizes dual treatment to waste water, and iodine extracts wastewater pH and is about 1,30% concentration H 2o 2dosage is 0.1 ‰.CO is passed in waste Ca water 2, Ca 2+formation is deposited in settling tank and is able to effective removal.Flushing waste water is after fine fack, and wherein sea-tangle block, the contour COD organism of Kelp fiber are efficiently removed.Transform latter 1 year, the equipment scaling such as pipeline and pump phenomenon obviously alleviates, and processing cost expense reduces 30%, sewage qualified discharge.

Claims (7)

1. a pretreatment process for algin production waste water, is characterized in that the method is carried out as follows:
A, waste Ca water pre-treatment: first waste Ca water pump is entered waste Ca water equalizing tank, then carry out aeration pre-treatment to waste Ca water, then add flocculation agent in the pretreated waste water of aeration, and mixing, staticly settles;
B, iodine extract Wastewater Pretreatment: to containing the oxygenant added in iodine waste water containing iodine waste water weight 0.1-0.5 ‰, mix, oxidized containing reducing substances residual in iodine waste water;
C, flushing waste water pre-treatment: first flushing waste water is flowed through solid-liquid separator and carry out solid-liquid separation, solids is separated, the water after separating treatment flows into flushing waste water equalizing tank, then carries out aeration pre-treatment to flushing waste water, removes the formaldehyde in flushing waste water.
2. the pretreatment process of a kind of algin production waste water according to claim 1, is characterized in that the aeration pre-treatment described in a step adopts CO 2producer produces CO 2carry out aeration, the volumetric concentration of carbonic acid gas used is 40%-90%.
3. the pretreatment process of a kind of algin production waste water according to claim 1, is characterized in that the aeration time described in a step is 50-70 minute.
4. the pretreatment process of a kind of algin production waste water according to claim 1, the polyacrylamide solution of the flocculation agent that it is characterized in that described in a step to be mass concentration be 0.5-1.5 ‰, add-on is the 0.5-1.5 ‰ of waste Ca water volume.
5. the pretreatment process of a kind of algin production waste water according to claim 1, is characterized in that the sedimentation time described in a step is 20-40 minute.
6. the pretreatment process of a kind of algin production waste water according to claim 1, the H of the oxygenant that it is characterized in that described in b step to be mass concentration be 28-32% 2o 2.
7. the pretreatment process of a kind of algin production waste water according to claim 1, is characterized in that the solid-liquid separator described in step c is arc solid-liquid separator.
CN201510992672.XA 2015-12-24 2015-12-24 Algin production wastewater pretreatment method Pending CN105523664A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106674374A (en) * 2016-12-26 2017-05-17 青岛聚大洋藻业集团有限公司 Process technology for extracting algin by utilizing sargassum thunbergii
CN113716731A (en) * 2021-07-16 2021-11-30 森田新能源材料（张家港）有限公司 Calcium treatment process for lithium hexafluorophosphate industrial wastewater

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1336339A (en) * 2001-08-07 2002-02-20 钱百龄 Novel process technology for sewage treatment in seaweed processing industry
CN101074140A (en) * 2006-09-21 2007-11-21 寻山集团有限公司 Process for treating, circulation recovering and reutilizing zero-discharge of algin production waste water
KR100783754B1 (en) * 2006-12-14 2007-12-07 (주) 테크윈 The process & equipments pva wastewater treatment for chemical and activated sludge
CN102992541A (en) * 2012-11-23 2013-03-27 中国水产科学研究院黄海水产研究所 Method for simultaneously extracting iodine and fucoidin from salted kelp blanching wastewater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1336339A (en) * 2001-08-07 2002-02-20 钱百龄 Novel process technology for sewage treatment in seaweed processing industry
CN101074140A (en) * 2006-09-21 2007-11-21 寻山集团有限公司 Process for treating, circulation recovering and reutilizing zero-discharge of algin production waste water
KR100783754B1 (en) * 2006-12-14 2007-12-07 (주) 테크윈 The process & equipments pva wastewater treatment for chemical and activated sludge
CN102992541A (en) * 2012-11-23 2013-03-27 中国水产科学研究院黄海水产研究所 Method for simultaneously extracting iodine and fucoidin from salted kelp blanching wastewater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106674374A (en) * 2016-12-26 2017-05-17 青岛聚大洋藻业集团有限公司 Process technology for extracting algin by utilizing sargassum thunbergii
CN113716731A (en) * 2021-07-16 2021-11-30 森田新能源材料（张家港）有限公司 Calcium treatment process for lithium hexafluorophosphate industrial wastewater

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Application publication date: 20160427