SU789407A1 - Unit for electrocoagulating organic impurities in waste water - Google Patents

Description

The installation consists of a common eauston housing i, coated with polymer gi / ftostik, for example, with a coyulum, 2 electrochemical cells of a coagulant-mixer (section) 3, a flotation tank 4, accumulator 1) 5 ll of accumulation, separation and return of foam, device 6 for colloidal precipitation (from-, Bornik), tray 7 for discharging purified water and a still-bed grating 8 for the flow established below the level of the liquid phase of the sump. The device 9 free overflow is located above the level of the Liquid phase. In the upper part of the partition U and the foam cooler 1 I, windows 12 are made to return the foam to the coagulant-mixer 3.

The installation works as follows.

The electrocoagulator functions according to the principle of a continuous stream of recycled waste water with the return of unreacted functions that go through 3neKT {X) XHNffl4ecKoro hydroxy or 1X) electrode metal and organic compounds in battery 2; mixing the complexation and association of metal hydroxides with organic compounds in the overflow free flow of water, which mixes metal hydroxides with organic molecules, initial complex particles and returnable foam. In the volume of saksh 3, a mixture of hydroxides and organic compounds undergoes coagulation due to the complexation reaction of metal hydroxides with electron-donor ligands of organic compounds, as well as an additional 1-step stage of additional oxidation of organic compounds of sewage with dissolved oxygen, water with colloidal fractions through lattice calming down 1) bleen enters the flotation sump 4, where colloidal particles are precipitated and discharged through a sump 6, and the purified water is discharged into The overflow from the level surface through tray 7. Foam consisting of small gas bubbles coated with finely dispersed colloidal parts and unoxidized, hydroxylated organic compounds, rises and accumulates in collection 5, where the foam is aged to strengthen and separate with bubbles. gas of colloidal particles precipitated and then returned

non-oxidized and non-hydroxylated organic compounds that are not precipitated into coagulant-mixer 3 due to the extrusion of excess foam through windows 12 with the level of water in the flotation tank 4.

Example. Electrocoagulation wastewater treatment in yeast production of protein-vitamin concentrates at the Kirishsky Biochemical Plant (Leningradskaya oblast, Kirishi).

At a pilot plant made in accordance with the invention, the sewage (60) was cleaned, containing impurities: protein - 0.28 g / l; ether-soluble - and, 45 g / l; suspended colloidal particles - 0.99 g / l. Ochshtsenna obtained water containing protein - 0, O38 g / l; ether soluble - 0,013 g / l; suspended colloidal particles - O, O 8 g / l. Purified water satisfies all requirements (W m and tolerances 1 1 for impurities in industrial effluents intended for discharge into natural water bodies.

The advantages of the installation consist in the improvement of the technological

electrocoagulation process, which will allow the use of an electro-cleaning method for treating industrial effluents of biochemical and microbiological productions. The installation will allow to increase the degree of water purification from high molecular weight organic impurities, while at the same time simplifying the process and design of the installation and reducing the consumption of electricity and electrode material.

formula invented and

An electrocoagulum for organic wastewater impurities, including an electrochemical cell, a flotation pond and a device for the selection of colloidal foam and sediment with a foam catcher, characterized in that, in order to increase the cleaning efficiency, it is equipped with a cubic coagulant-mixer, which is located between the cell and the cell and the unit with a clean sweep unit, which is located between the cell and the unit with a clean sweep unit, which is located between the cell and the cell with a clean sweep unit, which is located between the cell and the cell and the unit with a clean sweep unit.

. partitions separated from them and containing a free overflow device and a soothing grating installed in the partition between the coagulatory mixer and the flotation tank.

57894076

11p1 in BtTpxiioft part of the partition and information sources,

foam trap made windows for taken into account in the examination

return pepy flocta nta from floto-i. Collection number 3 LISI Ozdogyuvlennv

settling tank in a coagul tor-mixer by electrical treatment, 1976, p. SW.

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Claims (1)

Claim 45 Installation of electrocoagulation of organic wastewater impurities, including an electrochemical cell, a sump and a device for the selection of colloidal foam and sediment with a defoamer, 50 characterized in that, in order to increase the cleaning efficiency, it is equipped with a still bottom coagulator-mixer, installed between the electrochemical cell and the flotation tank, separated by partitions and containing a free overflow device and a soothing grid installed in the partition between the coagulator-mixer and the flotation tank, moreover, in the upper part of the partition and de-trap windows are made for returning the foam flocculant from the flotation tank to the coagulator-mixer.