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WO2016093686A1 - Procédé et système pour le traitement d'effluents résiduels contaminés par des métaux - Google Patents

Procédé et système pour le traitement d'effluents résiduels contaminés par des métaux Download PDF

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Publication number
WO2016093686A1
WO2016093686A1 PCT/MX2014/000205 MX2014000205W WO2016093686A1 WO 2016093686 A1 WO2016093686 A1 WO 2016093686A1 MX 2014000205 W MX2014000205 W MX 2014000205W WO 2016093686 A1 WO2016093686 A1 WO 2016093686A1
Authority
WO
WIPO (PCT)
Prior art keywords
effluent
treatment
metals
cell
container
Prior art date
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.)
Ceased
Application number
PCT/MX2014/000205
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English (en)
Spanish (es)
Inventor
Alejandro GARZA GALICIA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INSTITUTO SUPERIOR AUTONOMO DE OCCIDENTE AC
Original Assignee
INSTITUTO SUPERIOR AUTONOMO DE OCCIDENTE AC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INSTITUTO SUPERIOR AUTONOMO DE OCCIDENTE AC filed Critical INSTITUTO SUPERIOR AUTONOMO DE OCCIDENTE AC
Publication of WO2016093686A1 publication Critical patent/WO2016093686A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae

Definitions

  • the present invention relates to the technical field of Biotechnology, more specifically to the technologies for the treatment of wastewater, preferably even more so, to the treatment of wastewater contaminated with metallic contents; where these technologies include the use of natural resources, such as vermiculture.
  • patent document FR2921651 discloses a process for the treatment of organically contaminated water, such as domestic and agroindustrial wastewater, the method comprises: first the separation of solids contained in water effluents to obtain a flow of liquid and sludge, separated; to pre-treat the liquid flow by means of ventilation, and the sludge by thermophilic activation; treat pretreated liquid flow and sludge with the intervention of earthworms (Eisenia); and then filter the liquid flow with a filtration unit that has, an ultrafiltration membrane, a lagoon unit and / or an ultraviolet unit before discharging or storing the liquid flow.
  • the organically contaminated water undergoes a sandblasting operation before separating the sludge.
  • the solid elements are separated by passing the water to be treated through a sieve unit that has a 1 mm mesh.
  • This document already proposes the filtration for the separation of the liquid flow and the sludge, and ' a pretreatment of the effluent by means of ventilation, before being treated with the worms, but in a different way, but the water and sludge, are not contaminated with metals
  • Figure 1 is a schematic diagram of the system for treating wastewater with metals of the present invention.
  • the term "metallic content” is not only limited to the Nickel content, but also to those metals that can be removed from the effluent, with the system, process and worms, described in the present invention.
  • the present invention relates to a system for the treatment of residual effluents contaminated with metals.
  • a system for the treatment of residual effluents contaminated with metals One of the modalities is illustrated in Figure 1 preferred for the realization of said system, which is formed by a receiving tank (1) where the residual effluent contaminated with metals is received and concentrated; A filter (not shown) is provided in the receiving tank (1), in order not to allow the passage of major solids, such as garbage, that could come in the residual effluent to be treated.
  • the system has a decanter (2), which is adapted to perform the separation of a liquid and a solid part, where the solid part settles and is nothing more than the emulsion of the metals contained in the residual effluent in treatment.
  • This decanter (2) is connected in its lower part to a collection tank (3), where the solid part or metal emulsion is dried.
  • An evaporator / condenser (4) is connected at the top of the decanter (2) so that the liquid or supernatant part is channeled to that evaporator / condenser (4). Therefore, the evaporator / condenser (4) allows the recovery of the liquid fraction, by means of evaporation, which must withstand at least one temperature for boiling water.
  • At least one treatment cell (5) is communicated to the evaporator (4); said cell is configured to allow a liquid flow to flow as a zigzag and contain Then, the already filtered effluent is decanted in a conventional decanter (2), for at least 24 h; until there is a clear separation of the solid part from the liquid part. Where the solid part is an emulsion of the metals contained in the effluent.
  • Said metal emulsion contains up to 95% Nickel.
  • the evaporated part is passed to a treatment cell (5), which is configured so that the aqueous liquid is dispatched by the zigzag cell and can contain members of the Lumbricidae family capable of consuming metals.
  • the water is treated by worms, which are capable of including metals in their diet, so the water to be treated must remain in this cell for at least 48 hours, which means that The levels of its metallic content are reduced.
  • the species that is preferred in this process is Eisenia foetida, because it has been found that they are able to survive in effluents contaminated with metals, among which is nickel.
  • the effluent treated in the treatment cells (5) is recovered and can be stored or -6- a member of the Lumbricidae family capable of consuming metals.
  • the member of the Lumbricariae family it is preferred that it be
  • Esenia foetida and the metal to consume the Nickel, preferably, which is still in the evaporated fraction.
  • the system may also be provided with storage containers, for example, a humus container (6) that comes from earthworms; a container of leached water (7) that comes from cells (5), that is, water with a low metallic content; and a container of treated water (8) that comes only from the condenser (4).
  • storage containers for example, a humus container (6) that comes from earthworms; a container of leached water (7) that comes from cells (5), that is, water with a low metallic content; and a container of treated water (8) that comes only from the condenser (4).
  • those containers can be tanks and / or similar.
  • the number of these system components in question may be greater than 1, where the number of components will depend on the size of the system to be formed and the amount of effluent to be treated.
  • the invention also relates to a method for the treatment of residual effluents contaminated with metals; where the content of the metal Nickel (Ni) is predominant. Said method comprises the following steps:
  • the worms supplement their diet with nutrients suitable for them and can be applied directly to the cell (5).
  • the first to make a settling to separate the metal emulsion is to reduce the death rate of the earthworm, since nickel is highly toxic. So in this invention it is a question of obtaining a balance between the treatment of a residual effluent contaminated with metals, using the vermicompost technique, but taking care of the worm mortality, a situation that has not been contemplated in similar studies already known , where effluent treatments are carried out at the cost of the life of worms or any other organisms.
  • Example 1 Preferred embodiment of the method for treating water contaminated with Nickel.
  • Waste water contaminated with heavy metals was used, where the Nickel content was 837 ppm. Said residual water was previously filtered, to remove the superior solids, such as garbage.
  • the water was allowed to stand for 24 hours in a decanter vessel (2), in order to obtain two phases, one solid and one liquid or supernatant.
  • the solid phase that was concentrated in the bottom of the decanter (2) was nothing more than a nickel emulsion, which contained 95% of said metal.
  • This emulsion was recovered in a tank (6). While the liquid phase was transferred to an evaporator / condenser (4), where it was heated to 98 ° C which was when the water was boiling; for a time until 95% of said aqueous part was evaporated.
  • treatment cells (5) which were rectangular in shape and with partial divisions along its length, such that the water had a zigzag-shaped displacement.
  • treatment cell (5) housed 20 worms of the species Eisenia foetida. Water was retained for 48 h in the cells.
  • the worms were fed organic waste that was applied directly to the treatment cell (5).
  • Example 2 Preferred realization of a system for the treatment of waste water contaminated with metals, for example Nickel.
  • Example 1 In order to carry out the procedure of Example 1, a system was required that was made up of: A filter (not shown) of larger solids, such as garbage, etc. A decanter (2), adapted to recover the sediment (metal emulsion). An evaporator / condenser (4) that allowed the recovery of the evaporated part. Four rectangular cells (5), with vertical, transverse and partial divisions (9) distributed throughout the length of each cell (5), to allow water to flow in a zigzag manner; and said cell contained 20 earthworms from California (Esenia foetida).
  • the system was also provided with storage tanks, such as a tank where the metal emulsion was recovered (3), a tank (8) where the water that came from the condenser was recovered, a tank to receive the humus (6) originated by the worms, and a tank (7) where the leached or treated water (free of Ni) was stored.
  • storage tanks such as a tank where the metal emulsion was recovered (3), a tank (8) where the water that came from the condenser was recovered, a tank to receive the humus (6) originated by the worms, and a tank (7) where the leached or treated water (free of Ni) was stored.
  • Example 3 Determination of the flow of residual water, to avoid a high mortality of the worms.
  • one of the objectives of the present invention is to reduce the levels of metals in residual effluents, it is also that this reduction is carried out with a low rate of earthworm mortality. That is why an experiment was established to determine an adequate dose of water contaminated with Nickel, it was ideal to reduce the death of the earthworm.
  • Table 1 shows the treatment and results obtained from the experiment carried out in this investigation.
  • Table 1. Treatments and amounts of Nickel (ppm) of the effluent through the process of the present invention.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Removal Of Specific Substances (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

L'invention concerne un système et un procédé pour le traitement d'effluents résiduels contaminés par des métaux qui consiste à filtrer l'effluent, à le décanter, à le laisser reposer pendant 24 heures, à récupérer la partie solide, à évaporer/condenser la partie aqueuse, à traiter avec des vers Eisenia foetida, et à récupérer l'eau traitée. Le système comprend un filtre, un décanteur, un évaporateur/condenseur, une cellule de traitement et des contenants. L'effluent traité avec ledit procédé et système présente une faible teneur en métaux, surtout en nickel.
PCT/MX2014/000205 2014-12-09 2014-12-11 Procédé et système pour le traitement d'effluents résiduels contaminés par des métaux Ceased WO2016093686A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MXMX/A/2014/015067 2014-12-09
MX2014015067A MX2014015067A (es) 2014-12-09 2014-12-09 Metodo y sistema, para el tratamiento de efluentes residuales contaminados con metales.

Publications (1)

Publication Number Publication Date
WO2016093686A1 true WO2016093686A1 (fr) 2016-06-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MX2014/000205 Ceased WO2016093686A1 (fr) 2014-12-09 2014-12-11 Procédé et système pour le traitement d'effluents résiduels contaminés par des métaux

Country Status (2)

Country Link
MX (1) MX2014015067A (fr)
WO (1) WO2016093686A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108545886A (zh) * 2018-04-19 2018-09-18 广东明创环境有限公司 一种切削液处理的方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997010190A1 (fr) * 1995-09-13 1997-03-20 Act Department Of Urban Services Procede et systeme de traitement des dechets

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997010190A1 (fr) * 1995-09-13 1997-03-20 Act Department Of Urban Services Procede et systeme de traitement des dechets

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
GUPTA R ET AL.: "Stabilization of primary sewage sludge during vermicomposting.", JOURNAL OF HAZARDOUS MATERIALS, vol. 153, no. 3, 30 May 2008 (2008-05-30), AMSTERDAM, NL, pages 1023 - 1030, XP022587215, ISSN: 0304-3894, DOI: doi:10.1016/j.jhazmat.2007.09.055 *
KIZILKAYA RIDVAN ET AL.: "Vermicomposting of Anaerobically Digested Sewage Sludge with Hazelnut Husk and Cow Manure by Earthworm Eisenia foetida.", COMPOST SCIENCE & UTILIZATION, vol. 22, no. 2, 30 November 2013 (2013-11-30), pages 68 - 82, ISSN: 1065-657X *
RODRIGUEZ-CAMPOS JACOBO ET AL.: "Potential of earthworms to accelerate removal of organic contaminants from soil: A review.", APPLIED SOIL ECOLOGY, vol. 79, July 2014 (2014-07-01), AMSTERDAM, NL, pages 10 - 25, XP028650585, ISSN: 0929-1393, DOI: doi:10.1016/j.apsoil.2014.02.010 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108545886A (zh) * 2018-04-19 2018-09-18 广东明创环境有限公司 一种切削液处理的方法

Also Published As

Publication number Publication date
MX2014015067A (es) 2016-06-08

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