SU1301784A1 - Device for purifying slightly turbid stagnant water - Google Patents

Abstract

The invention relates to methods for purifying water from surface water sources, can be used in the field of drinking water supply, in particular for purifying low-turbid colored water, and improves purification efficiency by increasing the productivity of water clarification plants. A solution of flocculation prepared in the mode of rotational mixing at a speed of 4000-9000 rpm, which provides partial destruction of the polymer chain, simultaneously with or before the mineral coagulant, is introduced into the water to be purified. After mixing, the water is clarified by filtration through a contact mass, which uses a sand load or a layer of suspended sediment. With the introduction of polyacrylamide prepared in the mode of rotational stirring at a speed of 4000 rpm in an amount of 0.06 mg / l, simultaneously with the mineral coagulum, the duration of the filter cycle is 8.5 hours, and the speed of the upstream is 0, 85 mm / s.2 tab. 5 (L eo 4

Description

The invention relates to methods for purifying WATER from surface water sources and may find application in the field of drinking water supply j, especially when purifying low-turbid colored water.

The purpose of the invention is to increase the cleaning efficiency by increasing the productivity of water clarification facilities while reducing the consumption of polyacrylamide.

The method is carried out as follows.

The flocculant solution is prepared in the rotational stirring mode at a stirring speed of 4000-9000 MHH providing partial destruction of the polymer chain of the flocculant molecule.

Example 2 The method was carried out under the conditions of example 1, but the polyacrylamide was introduced simultaneously with the coagulum. The duration of the filtration cycle was 8.5 h., Speed of rising. The resulting water was introduced into the purified water.

. flocculant solution simultaneously with the mi-20m OdVmm stream of mm / s, neral coagulant or earlier. In tab. 1 and 2 are data on

After mixing, the water clarifies the effectiveness of the water purification after filtration through contact depending on the preparation method and the mass.

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Claims (1)

dosing of polyacrh-shamid. Invention Formula When filtering through the sand loading, the speed is maintained at 8.2 m / h, and the speed of the upward flow during water clarification through a layer of suspended sediment is varied so that the suspended matter content in the clarified water does not exceed 10 mg / l. Purification efficiency is assessed by the duration of the filter cycle and speed 35, their clarification by filtration through upward flow. Example 1 A portion of polyacryl- cleaning efficiency due to an increase in the amount of 5 g is placed in a. A mixer is poured into 1 liter of distilled 40 to clarify water while water and dissolve while mechanically reducing the consumption of polyacrylamide, rotating stirring with a mixer, dissolving it in water at a frequency of 4000 for 10 minutes. The solution is diluted to a working concentration of 50 mg / l. Anhydrous sulfuric acid is used as a coagulum 45 simultaneously with a mineral coagulum n-nta at a stirring speed of 4000-9000 mic and a tom or in front of him the cast aluminum is dissolved in sample (20 g) of which 1 liter of water. The purified water with the following characteristics: temperature (–3 ° C; chromaticity 39.6 degrees; pH 7.2; alkalinity 0.46 mg eq / l, oxidability 9.8 mg / l 0, polyacryl: amide is added to mg / l of water. Water is mixed, after which coagulant is introduced in an amount of 6 mg / g according to Alj OJ, mixed again and sent for clarification. The duration of the filtration cycle is 9.5 hours; the rate of rise of the stream is 1.0 mm / Co. Example 2 The method is carried out under the conditions of example 1, but the polyacrylamide is introduced simultaneously with the coagulum. The duration of the filter cycle is 8.5 hours, the rate of rise depends on the method of preparation and five dosing of polyacrh-shamid. Invention Formula The method of purification of low turbid colored water, including the preparation of anionic flocta nta-polyacrylamide by dissolving it in water in the mode of rotational mixing, the introduction of polyacrylamide and mineral coagulant in the purified water with the following; 1-1m contact mass, about t and h of the cleaning efficiency due to an increase in the productivity of structures for water clarification while reducing the consumption of polyacrylamide, its dissolution in water is carried out simultaneously with mineral coagulum at a stirring speed of 4000-9000 microns, and purification efficiency manufacturer for water clarification reducing consumption dissolving it in at the same time as mine tom or in front of him  Table I table 2