SU1204576A1 - Method of purifying waste water - Google Patents

Description

11204576

It refers to the methods of households, households and industry, and may be different from different industries and national households.

Eni - steep speed increase

but bar 3 pa from and us

by no gi

Example 1. In a cylinder containing 250 ml of waste water from sulphate-pulp production, 12.5 ml of a 0.1% aqueous solution of AljCSOx coagulant are added, at a rate of 50 mg / l. After intensive PAA

() + anionic PAA, g is schrolizovan- Hbrii 30%

PPK based on PEO + + PAK ()

Proposed

PPK based on PAA + PAK ()

From the data of the table it follows that the implementation of the proposed method allows to intensify the process by increasing the speed of the hydro-process and to improve the quality of the purified water.

Example 2. In a cylinder containing 250 ml of sulphate-cellulose production wastewater, 12.5 ml of a 0.1% aqueous solution of coagulant PECl3 was added at a rate of 50 mg / l. After vigorous stirring, 2 mg / l of a 0.1% aqueous solution of PEO is added to the solution, and then 2 mg / l of a 0.1% aqueous solution of PMAC with MMW-10 is added, the mixture is stirred, and the deposition rate is measured. stirring, 3 mg / l of a 0.01% aqueous solution of PAA or PEO is added to the solution, and then 3 mg / l of a 0.01% aqueous solution of PAA with MMWoool, the mixture is stirred and the particle deposition rate is measured and The degree of wastewater treatment.

Similarly, the process is carried out according to a known method, but with the introduction of a mixture of nonionic PAA and anionic surfactant hydrolyzed to 30% as flocculant

Comparative data on wastewater treatment proposed and known methods are shown in the table.

4.0

83

1, 02

15

94

95

1.08

1.09

2.5

3.0

suspension, it is 10.3 mm / s.

Example 3. To a cylinder containing 250 ml of bilge wastewater, add 12.5 ml of a 0.1% aqueous solution of coagulant A1g (30g) g and, after vigorous stirring, add 1 mg / l 0.2% - A 1% aqueous solution of PAA, and then 1 mg / l of a 0.2% aqueous solution of PAA with MM 310, the mixture is stirred, and the rate of deposition of the particles is measured. It is 8.6 mm / s.

Example 4. Analogously to Example 1, 1.5 mg / l is added to the wastewater of pulp and paper production in combination with A1 (50 c)

31204576Л

0.1% vrdny solution of G1LA, add 12.5 ml of 0.1% aqueous and then 1.5 mg / l of 0.1% aqueous solution of coagulant FeCl (50 mg / l) solution with MM 5-10, after stirring, the mixture is added and the precipitation rate of 2 mg / l of a 0.1% aqueous solution of particles is measured. It is then 2 mg / l of a 0.1% aq. 11.9 mm / s. Solution of PAA with MM 210. Mixture

mix and measure speed

Example 5: Into a cylinder, co-precipitating co-deposited sludge, containing 250 ml of waste bilge water. It is 9.8 mm / s.

Claims (2)

1. WASTE WATER TREATMENT METHOD, including the introduction of a coagulant and nonionic and anionic flocculants followed by separation of the precipitate formed, are distinguished by the fact that, in order to increase the degree of purification and increase the process speed, polyacrylamide or polyethylene oxide are used as a nonionic flocculant, and as the anionic flocculant, polyacrylic or polymethacrylate acid, which is introduced sequentially in equal molar ratio. _ 2. The method according to claim 1, characterized by the fact that flocculants are administered in an amount of 0.5-3.0 mg / l each. SU ,, „1204576