SU1204577A1 - Method of purifying waste water of viscose production - Google Patents

Description

11204

This invention relates to methods for treating wastewater from viscose operations and can be used to clean and neutralize industrial currents in chemical, metallurgical, engineering and other industrial processes containing heavy metals, suspended substances, organic or inorganic compounds. Jq

The purpose of the invention is to increase the degree of wastewater treatment.

Example 1. In industrial stocks with a pH of 1.6 and content, mg / l :. H2SOy 1283.8; CS 35.5; HjS 2.2; Zn - 5 199.5; COD 435.8; Surfactant 35.5, suspended solids 0 102, a solution of zolopulp was introduced at doses of 20 ml / l with the ratio of the components contained in the initial dry slate ash “in proportions x: CaO: SiOj: 150z: Fe7.0i: MgO: QS 1 , 5: 2.5: O, 8: 0.8.-1.0: 1.0: 1.5: 0.8: 0, where, with simultaneous mixing of the effluent with the goldpulp, the active is produced. the mixture is pumped in a closed circuit - the first stage of activation. The mixture is then pumped into the second activation stage with air blowing the mixture. The total activation time at two stages does not exceed 10 minutes and 2 hours, taking into account the results of compaction of the sediment. The composition of industrial effluent treated with shale ash by the proposed method contains, mg / l: H2SOii 717.6: € S 19.9; 35 0.19; ,eight; COD 130.7; G1AB 11.1; suspended solids 20.4, the height of the supernatant (b) is 9.2 mm, pH 7.4 is normal.

In all subsequent examples, the sequence of technological operations is the same as in example 1.

Example 2. In industrial stocks with a pH of 3.3 and content, mg / l: 39,2; CS 13.4; 2.35; Zn - 55.8; - COD 276.8; Surfactant 27.6; suspended solids 175.0, the introduction of a solution of zolopulp in doses of 20 ml / l with a ratio of the components contained in the initial dry shale ash in 50 portions: CaO: 510,; A1, Oz: Dfg: RegOz ;:: MgO: NaiO: KjO: P-i05 2.0: 3.0: 1.0: l5 o: 1.2: 1.2: 2; 0: 1.0: 1.0. The composition of the industrial effluent from shale ash contains, mg / l: 16.93; CS. 55 1.40; HjS 0.09; ,eight. COD 76.4; Surfactant 7.95; suspended particles 20.47; .h 8.5 mm; pH is normal.

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PRI me R 3 In promstock with a pH of 2.4 and content, mg / l:, 406,7; CS-L 40.5; 2.15; Zn 134.1; COD 287.2; Surfactant 28.0; suspended solids f 134.0, a solution of zolopulp was introduced in doses of 20 ml / l. The ratio of the components contained in the initial dry shale ash was proportional to: CaO: Si02: A1203: SO:: Reg Oz: Mg0: Na20: CgO : R.05 2.2: 3.5: 1.2: 1, 2: 1.4: 1.2: 2, 2: 1, 2: 1.2.

 The composition of industrial wastes treated with shale ash contains, mg / l: HjSOv 171.6; CSr 3.24; not found; ,five; COD 88.74; Surfactant 7.84; suspended solids 6.7; h 4,5; pH is normal (9.0).

Example 4. In industrial stocks with a pH of 2.2 and content, mg / l: 539; CSj 32.8; P ,, 8 2.35; , 6; COD 293.8: surfactant 47.8; suspended solids f 282.6, a solution of zolopulp was administered in doses of 20 ml / l with the ratio of components contained in the initial dry sol in the proportions: CaO:.: AltOj: SOj: Fe:: MgO: Na5.0: K20: Pj 05 2.4: 4.0: 1.4: 1.4: 1: 1.6: 1.4: 2.4: 1.4: 1.4. The composition of industrial effluent purified by shale ash contains, mg / l: H, SOi (285.1; CS, 4.23; 0.26;, 8; COD 164.93; surfactants 14.96; 52.4; 5 mm pH is normal (8.2).

Example 5. In industrial stocks with a pH of 2.4 and content, mg / l:, 654.2; CS 36.0; 1.24; , 80; COD 265.3; Surfactant 28.0; suspended solids .6173.0, a solution of zolopulp was administered in doses of 20 ml / l with the ratio contained in the initial dry. the ash of the components in the proportions: CaO: SiOj: Al ,, 03: S03: Fe Oj: MgO: Na5.0:: K ,, 6: 4., 5: 1.6: 1.6: 1.8: 1 , 6:: 2,6: 1,6: 1,6. The composition of industrial wastes treated with shale ash contains, mg / l: HjSO 353.1; CS. 5.76; not found; , 6; COD 89,14; Surfactant 14,17; suspended solids 50.86, h 7.8 mm; pH is close to normal (8.0).

Rationing of the components included in the ash reagents and their optimal ratios made it possible to obtain the following results on complex purification of industrial effluent of viscose production: at a ratio of CaO: SiOj: A 0: SOj: Ge20:: MgO: Na, 0: K2 0: P40 2 6: 2.5: 0.8:

3

: 1,0: 1,0: 1, 5: 0,8: 0,8, shed1 w-1 percent for cleaning up amounted to 50.2%, CS 94.4%, H./S 94.7% ;

, 7%, COD - 73.4%, surfactant - 69, suspended matter 82.7%; with a ratio of components equal to 2.2: 3.5: 1.2: 1.2: 1.4: 1.2: 2.2: 1.2: 1, the average percentage of HjSOfj was 55.6%; C5g - 95.4%; - 100%, 95, COD - 74.6%; Surfactant - 78.2%; suspended matter - 90.4%; with a ratio of components equal to 2.4: 4.0: 1.4: 1.4: 1.6: 1.4: 2.4: 1, 4: 1.4, the average percentage of HjiSOi was 47.6% ; CS2, - 87.2%, - 95.3%, 94.4%; HP-K - 75.4%; Surfactant - 66.7; suspended matter - 80.6%; with a ratio of components equal to 2.6: 4.5: 1.6: 1.6: 1.8: 1.6: 2.6: 1.6: 1, the average percentage of 40.7%, CSi - 87.2%; - 93.8%; 89.6%; COD - 70.3%; Surfactant - 55.1%, suspended matter - 74,

The effluent cleaning efficiency when used is normalized

Compiled by L. Skorokhod Editor N. Kishtulinets Tehred Z. Kastelevich Proofreader A. Zimokosov

Order 8487/23 Circulation 883 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 4/5, Moscow, Zh-35, Raushsk nab. 113035

Branch PPP Patent, Uzhgorod, st. Project, 4

Ratios increased by NgZO, 22%, CS - 24.6%, - 15.2%, 5.7%, COD - 5.3, surfactant - 8.9, suspended matter - 5.8%.

Along with an efficient process

Precipitation of heavy metal ions, in particular Zn (over 95%), especially intensively neutralizes acid, hydrogen sulfide, carbon disulfide and other impurities and substances that have a significant effect on the total pollution of industrial effluent.

Purification efficiency in neutralizing acidic waste water with dry ash reagents after 2 hours

The concentration of zinc is 6-8%, suspended solids - 7-9%, COD - 46%, surfactant - 5-8%. In a number of cases, the presence of surfactants is already after 10–15 min. COD, CS.,

 and no other dissolved substances are observed.

Claims (1)

METHOD FOR WASTE WATER TREATMENT OF VISCOSE PRODUCTION, including the introduction of calcium silicate material, mixing, settling and separating the precipitate, characterized in that, in order to increase the degree of purification, slate ash or peat ash or vermiculite are used as calcium calcium silicate material in the ratio components of CaO: SiO ₂ : A1 _? 0 j: SOj: Fe ₂ 0 3 ,:: MgO: Na, 0; K ₂ 0: P ₂ Or, equal to (2.0-2.4):: (3.0-4.0) :( 1 , 0-1.5) :( 1.0-1.2) :. : (1.2-1.6) :( 1.2-1.5) :( 2.0-2.4) :. : (1.0-1.4) :( 1.0-1.4), and mixing is carried out in two stages by _ circulation in a closed loop, moreover, in the second stage, additional purging with air is carried out. SU, 1204577 1 12C