SU1198021A1 - Method of final purification of waste water in biological reservoirs - Google Patents

Abstract

1. METHOD FOR SEWAGE TREATMENT IN BIOLOGICAL PONDS, including contact with higher aquatic vegetation in flowing conditions, characterized in that, in order to achieve the year-round required water quality by stabilizing the process over the seasons of the year and reducing the duration of the process and the occupied areas, as reed aquatic vegetation is used in higher aquatic vegetation, which is planted on submerged transverse dams, and in addition macroalgae are planted on inter-ambush sites - Chara vulgar s Z, 2, Method n Claim, 1, characterized in that biological ponds have a depth of 3-4 m and are separated by transverse logs (1-2 m high dams, 3. Method according to claim 4, 1 and 2, characterized in that the dam area is / 3 from the entire pond area with a dam width of 620 m. Р кх

Description

The invention relates to the treatment and purification of wastewater and can be used for the treatment and purification of industrial and domestic wastewater, as well as their mixtures, containing biochemically oxidizable components. The purpose of the invention is to achieve the year-round required water quality by stabilizing the process over the seasons of the year and increasing the duration of the process and the occupied areas. The method is carried out as follows. Purified in various ways, wastewater is fed to the tertiary treatment in a biological pond, planted with TR9STNIKOM and hara. Water is dispersed, on the short sides of the pond, in an even flow. The pond is blocked by transverse dams, on which ordinary cane is planted. The height of the dams is 1-2 m with a total pond depth of 3-4 m. The height of the dams is due to the biology of common reed, which does not veil more than two meters deep. The area of the dams is 1/3 of the total area, and the width is 6–20 m. The period after cleaning in the cold period of the year is 3 days, and in the warm period 2 days. When a runoff containing up to 50.MG / L of oil products is supplied, the time increases to 5 days in all seasons I. The role of higher aquatic vegetation and macroalgae used in after-treatment ponds consists in trapping mineral and organic matter, as well as concentrating on its surface. bacteria, microalgae and protozoa, which are the main clearing agents. During the period of vegetative growth, the plant intensively absorbs azo and phosphorus-containing substances, enriches the effluents with biologically active substances and causes deep disinfection. In a bio-pond with submerged dams located transversely to the flow, a sectional sequence and sequence are created in the alternation of different biocenoses, which determines the depth of after-treatment and de-cleaning. contamination. The combination of reed and hara affects the suppression of growth and development of phyto- and zooplankton, which are their 9212 biological competitors for light and nutrients. As a result, secondary pond contamination is prevented. With a depth of 3-4 m, the water temperature in the ponds does not exceed 25-26 C, the effect of after-treatment and disinfection stabilizes according to the seasons of the year, the BODF of the purified waste liquid in all seasons of the year 2-5 mg / l, suspended solids 3-5 mg / l, petroleum products - 0.030, 05 mg / l, if the titer is 0.111. Example. The initial waste liquid with BOD - 15 mg / l, suspended substances - 12 mg / l and coli-titer - 0.0004 is fed to the ponds from a reed deep recess 1 m on dams 6 m wide and an arrays depth of 3 m . The area of the dams is 1/3 of the total area of the pond. The time of purification in T (warm period of the year - 2 days. The quality of the purification of waste liquid: BOD 2 mg / l, suspended solids 3 mg / l, if the titer is 0.11.1. EXAMPLE 2. The purification is carried out analogously to the example 1. The reed is planted at a depth of 1 m at a 13 m wide dam and a depth of 3 m in the ambush ambush areas, after-treatment time during the warm period of the year is 2 days. The quality of the refined waste liquid: BPKr - 1.5 mg / l, suspended substances - 2 , 5 mg / l, coli titer, 0.111. P RIM e p 3. Post-treatment is carried out analogously to example 1. Reed is planted to a depth of 1.0 m on dams 20 m wide and depths The second Hara ambush is 3 m in the areas between the plunks, after-treatment time during the warm period of the year is 2 days, the quality of the refined wastewater from BODC is 1.7 mg / l, suspended solids is 2.2 mg / l, and the titer is 0, 111. Figure 1 presents comparative data on the quality of after-treatment with a dam width of 6-20 m. Since the quality of an after-treatment liquid with a dam width of 6 and 20 m is very close, further experiments are carried out only in bio-ponds with a dam width of mainly 6 m. Measure 4. The original purified waste liquid is sent to a biopond with a dam area less than 1/3 of the whole

3

- pond area. B. The rest of the after-treatment is carried out analogously to Example 1. The quality of the after-treatment wastewater BIIKjj is 12 mg / l, the suspended substances are 9.3 mg / l, and the titre is 0.0004.

An increase in the area of dams over 1/3 of the pond area is inexpedient, since the cost of construction increases with practically no improving indicators of the degree of purification.

PRI me R 5. Post-treatment is carried out analogously to example 1. The tropus is sown at a depth of 1.5 m and 15 m wide dams and a depth of 4 m in the dam areas. The tertiary treatment time in the warm period of the year is 2 days. The quality of the treated wastewater: BODK - 1.8 mg / l, suspended solids - 2.2 mg / l, if the titer is 0.111.

, li p and me r 6. Post-treatment is carried out analogously to example 1. Reed is planted at a depth of 2 m on dams 6 m wide and a hara landing depth of 4 m on the ambush sides. The tertiary treatment time during the warm period of the year is 2 days. The quality of the treated wastewater: BODC - 1.5 mg / l, suspended solids - 2 mg / l, if the titer is 0, 111.

Example Post-treatment is carried out analogously to example I. Reed is planted at a depth of 1 m on dams with a width of 6 m and a depth of planting hara

3m at the crossroads. The post-treatment time in the cold period of the year is 3 days. The quality of the treated wastewater: BIIKf, 2.5 mg / l, suspended solids - 3.0 mg / l, if the titer is 0, 111.

Example Post-treatment is carried out analogously to example 1. The reed is planted at a depth of 2 m, a width of 6 m and a depth of hara landing of 4 m at the ambush points. The post-treatment time during the cold period is 3 days. The quality of the refined waste liquid: BOD - 2 mg / l, suspended solids - 1.5 mg / l, the titer is -0.111. .

П РИМ ер 9. Initial waste liquid with BPKr - 25 mg / l, cocked

90 mg / l, colititron - 0.0004 and oil content up to 50 mg / l are fed into ponds with a reed depth of 1 m

J on dams with a width of 6 m and a depth of 3 m in the harness on the amymbosites. The post-treatment time in all seasons of the year is 5 days. The quality of the treated wastewater: EPK to 5 mg / l, suspended solids 3, 5 mg / l, if the titer is 0.111.

Primenyu ryu. Post-treatment is carried out analogously to example 6. Reed is planted at a depth of 2 m on dams

5) 6 m wide and hara landing depth

4m at the crossroads. Post-cleaning time in all seasons of the year 5 days. The quality of tertiary treatment of waste liquid: BPKts - 4.0 mg / l, suspended solids - 3.3 mg / l, coliter - 0.111, petroleum products 0, 03 mg / l.

PRI me R 11. The initial purified waste liquid with BOD „- 15 mg / l, suspended faults - 12 mg / l and the number-titer - 0.0004 is served in ponds with a dam area less than 1/3 of the total area of the pond and the depth of ambush3Q of reed O, 5 m on dams 5 m wide and an embedment depth of 2 m on inter-amber areas. The tertiary treatment time during the warm period is 1 day. The quality of the treated wastewater: BOD - 14 mg / l, suspended solids - 10 mg / l, with a titer of -0.004.

PRI me R 12. Initial cleared: liquid waste with BODC, 15 mg / l, suspended and with substances mg / l and 1 olytiter - 0.0004 served in ponds with an area of dams equal to 1 / 3 of the entire area of the pond, and the depth of planting of reeds 3 on dams more than 20 m wide and hara more than 5.0 m in the areas of the ambush. The tertiary treatment time during the warm period of the year is 3 days. The quality of the refined waste liquid, ti: BOD „- 12 mg / l, weighed substances: 11 mg / l, after-titer - 0.0004. In tab. 2 shows the comparative data on the indicators of post-treatment by the proposed and known methods.

11980216

Table 1

Source Waste Fluid

15.0 12.0 0.000004

Claims (3)

1. METHOD FOR TREATING STOCH- NEW WATER IN BIOLOGICAL PONDS, including contact with higher water vegetation under flowing conditions, characterized in that, in order to achieve year-round required water quality by stabilizing the process according to the seasons of the year and reducing the duration of the process and the occupied area, use higher aquatic vegetation as common reed, which is planted on flooded transverse dams, and additionally macroalgae - Chara vulgaris Z. - are planted on inter-dam areas. 2. The method according to π. 1, differing by the fact that _a biological cal ponds have a depth of 3-4 meters and are divided © cross flooded causeways height 1-2 meters. 3. The method according to PP. 1 and 2, characterized in that the area of the dams is 1/3 of the total area of the pond with a width of dams of 620 m. SU „„ 1198021 f