RU2608225C2 - Method of centralized water supply with creation of artificial water circulation system in regions with arid climate - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: invention relates to drinking water preparation method for centralized water supply to intended for building territory and can be used in the housing and utilities sector of regions with arid climate. Method of centralized water supply with creation of artificial water circulation system includes arrangement of artificial water reservoir, communication lines, water purification plant and sewage treatment facilities. Artificial water circulation system has reservoir including two dams, dividing water reservoir water volume into two unequally large parts, first of which in upper reaches is equipped with floating bioreactors, purified waste water inlet, ooze collecting devices and flood waters passing bypass channel, and second is with water intake, water treatment station including clean water reservoirs, clean water conduits, two water decontamination devices and water sorption purification device. Tap water purification plant, water reservoir and sewage purification plant deposits are processed together into organomineral fertilizers.

EFFECT: enabling quality of water supplied to consumers needs, at imposed requirements level.

1 cl, 2 dwg

Description

The invention relates to a method for the preparation of drinking water for centralized water supply of a residential area and can be used in housing and communal services of regions with an arid climate.

It is known to use reservoirs to draw water from a surface source for drinking and drinking needs of settlements and industrial enterprises [1].

Centralized water supply includes a water intake and a water treatment plant (WWTP) with a reservoir of clean water (RCHV).

Unfortunately, reservoirs are provided on rivers only with a stable flow rate of water by the seasons of the year and the presence of running water. But the need for water for centralized water supply also exists in regions where there is a lack of stability of water supply in open watercourses, although in the regions there are residential buildings and industrial enterprises that need centralized water supply.

A stable source of fresh water is municipal wastewater and rainfall water. However, after sewage treatment plants, the quality of treated water is not stable and depends on many random events (interruptions in power supply, low qualification of operating personnel, equipment accidents, etc.), although sewage treatment plants (WWTP) should bring the quality of treated water to the values close to the quality of water from surface sources [2].

Objectives of the invention:

- ensuring the stability of the quantity and quality of water by creating artificial reservoirs with a volume that allows them to carry out self-purification processes and accumulate water for the stability of the water treatment plant of the centralized water supply;

- take into account flood events during periods of snowmelt and rainfall;

- ensure the quality of water supplied to the needs of consumers at the level of requirements.

The closest techniques for solving the tasks of the invention are the solutions given in the book [2]. In the prototype [2], it is proposed to provide for the accumulation of treated wastewater and preliminary intensification of the self-cleaning ability of the water supply source through the operation of floating water treatment plants in the water area of the reservoir with the creation of devices for the regeneration of the nozzles of the treatment devices and the processing of sludges deposited in the treatment device before their disposal as organo-mineral fertilizers for agriculture.

When preparing reservoir water for use, it is necessary to use sorption and physicochemical methods [3], which make it possible to bring water quality to the level of consumer requirements [1].

The proposed method is illustrated in FIG. 1 and 2.

In FIG. 1 is a diagram of an artificial reservoir, and FIG. 2 is a flow chart of a water treatment process at a water treatment plant.

In FIG. 1 and 2, the following items are available:

1. The bed of a drying river or ravine

2. Dams

2.1. Main dam

2.2. Dam blocking the water area of the reservoir with a system of equipment and measures for self-purification of water and removal of sediment

3. The reservoir

3 ^/ Water withdrawal

3.1. Float

3.2. WOS water pump

4. High water bypass

5. Floating bioreactor

6. Supply of treated municipal wastewater

7. Water treatment plant

8. Devices for disinfecting water from a reservoir

9. Devices for removing biogenic elements (nitrogen, phosphorus, organic substances) from the water of the reservoir

10. Water supply line to consumers

11. Pure water tank (RCHV)

11.1. Water level sensor

12. WWTP (sewage treatment plant)

Biologically treated wastewater via communications (6) reaches the dam (3) in an artificial reservoir on the basis of a fire tank, channel (1) of a drying river or ravine. To pass flood waters or water of intense rains, a bypass channel is provided on the artificial reservoir (4). Water for supply to the WWTP - water treatment plant (7) is taken from the water area of the reservoir created by the main dam (2.1) and dam (2.2).

The water treatment plant (7) necessarily includes devices (8) for disinfection, devices (9) for removing nutrients and other undesirable impurities from the water, a clean water tank (11) to ensure uninterrupted water supply in case of uneven water intake, and water pipes (10) for water supply Networks for water consumers.

The presence of two dams, dividing the reservoir water volume into two unequal parts, is due to the need to solve the problem of intensifying self-cleaning processes, accompanied by additional precipitation falling to the bottom of the artificial reservoir and the need to periodically collect these sediments for processing and preparation for disposal.

The presence in the water purification process of the system of equipment for water disinfection (8) before conducting water purification processes and after water purification is due to the need to eliminate the interfering effect of living microorganisms (hydrobionts) on the cleaning process in devices (9) and to prevent the growth of microorganisms in RFC (11) and the water distribution network (10).

The method of artificial water cycle is as follows.

Water from pipelines (10) is unevenly taken by consumers from the RFW (11) and, after being used for municipal and household needs of the municipality, goes to the sewage treatment plant KOS (12), where it is freed from the bulk of impurities, but its quality still does not fully meet consumer requirements, such as drinking water quality. In addition, the municipality has irretrievable water losses, such as irrigation of green spaces, fire fighting, etc. The volume of the reservoir and the performance of the VOS water treatment plant (7) should take this into account.

The volume of water in the reservoir (3) is replenished during rains and snowmelt due to drainage from underground water sources. But the main supplier of incoming water is treated municipal wastewater. Due to the instability of the composition of treated municipal wastewater in the artificial reservoir, a volume is allocated in which the processes of water self-purification are initiated due to the activity of hydrobionts present in the reservoir water and in the treatment plant of a floating bioreactor (5). Of course, the volume of the reservoir created artificially is influenced by the climate in the region, the presence of ice formation, etc.

During the course of self-purification of water in an artificial reservoir (3), precipitation is released and most intensively in the upper reaches of the reservoir. Therefore, the upper part of the reservoir should be equipped with a system of equipment and communications for the removal of sediments at WWTP for their processing and preparation for disposal. The volume of the reservoir (11) for the accumulation of purified water should take into account the unevenness of water withdrawal by consumers during the day. The technological scheme of water treatment at VOS (7) should include devices that guarantee the uninterrupted operation of water treatment technology and bring water quality to the required level. Water-disinfecting devices (8) can be flowing or intermittent [4]. For low water consumption (up to 200 m ³ / h), flowing electrolyzers (8) that activate wastewater chlorides are used. Since each resident of the municipality releases 9 g of chlorides per day, flow-through electrolyzers are guaranteed to carry out the initial disinfection of water, eliminating the influence of hydrobionts on the course of sorption processes in the averagers (9) of the subsequent water treatment. Moreover, they guarantee disinfecting devices (8), introducing activated chlorine-containing reagents after sorption devices (9) [4].

Sorption devices (9) remove residual amounts of nutrients from water, including phosphorus, sulfur, and other chemicals. Devices (8) for disinfecting water entering the RFE (11) and water conduits (10) are designed to exclude the development of microorganisms in (10) and (11) along the route of water to consumers.

Used Books

1. Water supply II .: Per. with finnish. / E. Karttunen. - St. Petersburg: New Journal, 2005 .-- 688 c., Ill.

2. Municipal wastewater treatment with reuse of water and treated sludge: theory and practice / N.I. Kulikov, A.N. Nozhevnikov and others. Under the general ed. N.I. Kulikova, A.N. Nozhevnikova. - M .: Logos, 2015 .-- 400 p.

3. Fesenko L.N., Pchelnikov I.V., Ignatenko S.I., Fesenko A.L. To the choice of the regime of electrolysis of sea water in the production of sodium hypochlorite. Materials of the VII International Scientific and Practical Conference "Water Treatment Technology". Technovod, 2014.

4. Smirnov A.D. Sorption water purification. L .: Chemistry, 1982.

Claims (1)

The method of centralized water supply with the creation of an artificial water cycle system, including the arrangement of an artificial reservoir, communications, water treatment plant and sewage treatment plants, characterized in that the artificial water cycle system has a reservoir, including two dams, dividing the reservoir water volume into two unequal parts, the first of which the upper reaches are equipped with floating bioreactors, a sewage inlet, sludge collection devices and bypass flood water passage channel, and the second - a water intake, a water treatment plant, including clean water tanks, clean water pipelines, two devices for disinfecting water and a device for sorption water treatment, while the sludge from a water treatment plant, a reservoir and a sewage treatment plant are processed together in organic and mineral fertilizers.

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