CN108946862B

CN108946862B - Landscape water treatment process

Info

Publication number: CN108946862B
Application number: CN201810812157.2A
Authority: CN
Inventors: 梅玮菁; 武涛; 张攀峰; 徐建; 郏新宇; 韩慧
Original assignee: Jiangsu Aoyang Ecological Garden Co ltd
Current assignee: Jiangsu Aoyang Ecological Garden Co ltd
Priority date: 2018-07-23
Filing date: 2018-07-23
Publication date: 2021-03-02
Anticipated expiration: 2038-07-23
Also published as: CN108946862A

Abstract

The invention designs a landscape water treatment process. In order to solve the problem, the process combines solar photocatalysis and photovoltaic power generation technologies to carry out in-situ treatment on urban non-point source pollution, greatly reduces the pollution degree of surface runoff, and further realizes the reduction of the pollution degree of landscape water. The light response floor tile is arranged, so that a photocatalytic effect is generated when rainwater is distributed on a shallow layer after the rainwater falls, the defect that the solar energy cannot be continuously utilized in rainy days or at night is overcome by arranging the photovoltaic power generation device, and a new way is provided for urban water treatment.

Description

Landscape water treatment process

Technical Field

The invention relates to the field of water treatment, in particular to a landscape water treatment process.

Background

Along with the improvement of living standards of people, higher requirements on living quality are met, and a plurality of problems are brought, wherein in the process of urban activities, people bring serious pollution to activity areas such as squares, sidewalks, parking lots and the like, and a plurality of pollutants are difficult to be brought into urban landscape water bodies along with rainfall before being degraded, so that the urban river channels and the landscape water bodies are seriously blackened and smelled, and the serious pollution is caused to surrounding surface water and underground water. Pollutants (silt particles, nitrogen and phosphorus nutrient elements, heavy metals, organic pollutants and the like) accumulated on the impervious underlay surface of the urban ground surface in sunny days form urban surface runoff surface source pollution under the actions of rainfall and surface runoff scouring and conveying, and enter a rainwater drainage pipeline along with the transmission of runoff to deteriorate the water quality of a receiving water body. Domestic and foreign research proves that urban surface runoff becomes the second large water surface pollution source next to agricultural runoff and is also the second large urban water environment pollution source except urban domestic sewage and industrial wastewater. How to effectively reduce the urban non-point source pollution and solve the problem of black and odorous water body of urban landscape becomes an important subject.

Disclosure of Invention

The invention aims to provide a water treatment process capable of effectively utilizing solar energy to reduce the concentration of surface runoff pollutants, which mainly adopts the sunlight catalysis and solar power generation electrocatalysis to improve the treatment efficiency of polluted water bodies, and aims at solving the problems that the current treatment level of urban sewage and rainwater surface runoff is low and the non-point source pollution is increasingly severe.

In order to achieve the purpose, the invention adopts the following technical measures:

1) paving floor tiles in sidewalks, squares and river bank laying areas or open parking spaces;

2) the rainwater falls to the floor tiles and then undergoes a photoelectrocatalysis reaction, and then the rainwater converges to a collection system;

3) detecting the water collected by the collecting system, directly discharging into the landscape water body when the water quality reaches the standard, introducing the next conventional water treatment process for treatment if the water quality does not reach the standard, discharging into the landscape water body after reaching the standard, discharging the water into the area where the photoresponse floor tiles are laid through the backflow system for treatment when the water quality of the landscape water body does not reach the standard, and then circulating back into the landscape water body, wherein the water quality is shown in figure 1.

Furthermore, the photoresponse floor tile is prepared by adding additives into the water permeable brick, wherein the additives are iron, carbon, titanium dioxide, copper and aluminum, and the addition amount of the additives is 2-5% of the weight of the water permeable brick; the additive contains Fe 30-40 wt%, C30-40 wt%, titania 10-15 wt%, Cu 5-10 wt% and Al for the rest. The titanium dioxide is titanium-containing slag, and the titanium-containing slag is titanium concentrate, high-titanium slag, climbing steel slag, steel bearing slag and the like;

further, the additive is weighed according to the dosage, carbon, copper and aluminum are put into a ball mill for ball milling for 30-180min, then iron is added for continuous ball milling for 60-120min, and the mixture is taken out to obtain an iron-carbon mixture; crushing and ball-milling titanium dioxide, adding the iron-carbon mixture into a ball mill, ball-milling for 30-60min, sieving with a 200-mesh standard sieve, heating the mixture of sieved substances at 800-1000 ℃ for 2h, and then uniformly cooling to room temperature at 250 ℃/h of 200-mesh to finally obtain the additive.

The concave surface is arranged on the upper surface of the photoresponse floor tile, so that rainwater can stay for a long time, the rainwater can continue to generate photocatalysis after raining on a sunny day, and the light sensing device is arranged on the concave surface, so that a power supply system is triggered when the rainwater is deep, and pollutants are continuously degraded by supplying power.

Further, a photovoltaic power generation device is arranged for collecting electric power, and the photoresponse floor tile is supplied with power in rainy days or at night, so that pollutants can be continuously removed from the water body by using solar energy, a photocatalytic reaction is generated after sunlight irradiation in a sunny state, iron, carbon, copper and aluminum in the floor tile generate a photoelectrocatalysis effect under the action of photoelectrons, and pollutants in the polluted water body are strongly degraded/removed; and in order to prevent the photoelectric catalysis effect from disappearing in cloudy days or at night, the photovoltaic power generation device is arranged to collect electric energy, the power is supplied to the floor tiles at night or in cloudy days, the electrocatalytic oxidation is realized under the action of low voltage, and pollutants in water are removed. The light-responsive floor tile has disposed therein electrodes, the electrodes being a cathode and an anode, the cathode being one or more and the anode being one or more. The photovoltaic power generation device is arranged outside the floor tile, stores the converted electric energy in a power supply system and supplies power to the cathode and the anode through leads; the power supply system is connected with an external power supply, and the external power supply is a battery or municipal power.

Further, a light sensing device is arranged, when the external sunlight meets the photocatalysis condition, a signal is transmitted to the controller, the controller closes the power supply system, and when the external sunlight is low in intensity and does not meet the photocatalysis condition, the signal is transmitted to the controller, and the controller opens the power supply system.

Further, the photovoltaic power generation device is arranged on the partial surface area of the light response floor tile; each floor tile is an independent system, so that space can be saved, and utilization efficiency and construction efficiency are improved.

Compared with the prior art, the invention has the following characteristics:

1) the light response floor tiles are adopted for laying, so that under the irradiation of sunlight, the floor tiles have photocatalysis, pollutants in rainwater are reduced, and the water source pollution degree of the landscape water body is reduced.

2) Titanium-containing slag, iron, carbon, copper and aluminum are added into a common water permeable brick in the photoresponse floor tile; under the action of iron, carbon, copper and aluminum, tiny batteries with uniform potential are formed, potential differences exist among iron-carbon, copper-carbon, iron-copper and other particles to form numerous tiny primary batteries, meanwhile, titanium dioxide generates electronic transition under the irradiation of sunlight to form a multi-stage synergistic effect, the pollutant degradation efficiency is obviously improved, and after rainwater falls, a photocatalytic effect is generated when water is distributed on a shallow layer.

3) The photovoltaic power generation device is arranged for collecting electric power, and when no sunlight irradiates, the electric power is supplied to the photoresponse floor tile to form an electro-catalysis system, so that pollutants are efficiently degraded; the method can treat the polluted rainwater in situ, directly treat the urban non-point source pollution, solve the defect that the urban non-point source pollution cannot continuously utilize solar energy in rainy days or at night, and provide a new way for urban water treatment.

4) Titanium-containing waste residues are fully utilized, and the catalytic action of the titanium-containing waste residues is creatively used for rainwater treatment, so that a large amount of waste residues can be utilized as wastes, and the paving of the photoresponse floor tiles obviously improves the quality of rainwater and reduces the pollution risk of lakes and rivers.

5) Iron, carbon, copper and aluminum in the floor tile generate a photoelectrocatalysis effect under the action of photoelectrons, pollutants in a polluted water body are degraded/removed strongly, and meanwhile, the iron and the aluminum form flocs to adsorb heavy metals and refractory organic matters to fix the pollutants.

Drawings

FIG. 1 is a schematic view of a landscape water treatment process;

fig. 2 is a schematic view of a light responsive floor tile;

FIG. 3 is a schematic diagram of a water circulation process.

Detailed Description

Example 1:

in the landscape water treatment process, the photoresponse floor tiles are laid in a small square of a certain city, rainwater falls to the floor tiles to generate a photoelectrocatalysis reaction, then the rainwater converges to the collection system, the collected water quality is detected to be not up to standard, and the rainwater collected by the collection system is introduced into the next conventional water treatment process to be further treated and then is discharged into a landscape water body;

the photoresponse floor tile is prepared by adding additives into a water permeable brick during preparation, wherein the additives are iron, carbon, titanium dioxide, copper and aluminum, and the addition amount of the additives is 3% of the weight of the water permeable brick; the additive contains 30 wt% of iron, 35 wt% of carbon, 11 wt% of titanium dioxide, 6 wt% of copper and the balance of aluminum. The titanium dioxide is titanium-containing slag, the photovoltaic power generation device is arranged outside the floor tile, converted electric energy is stored in a power supply system, and the electric power is supplied to a cathode and an anode through a lead; the power supply system is connected with an external power supply, and the external power supply is a battery or municipal power.

Collecting rainwater processed by the photoresponse floor tile to be compared with the common floor tile:

project index	Light response floor tile	Common floor tile
			BOD5(mg/L)	30	123
Ammonia nitrogen (mg/L)	5.8	13.5

Example 2:

on the basis of the embodiment 1, the improvement is carried out, a light sensing device is arranged, as shown in fig. 2, when the external sunlight meets the photocatalysis condition, a signal is transmitted to a controller, the controller closes a power supply system, and when the external sunlight is low in intensity and does not meet the photocatalysis condition, the signal is transmitted to the controller, and the controller opens the power supply system.

Example 3:

on the basis of embodiment 2, improve, photoresponse ceramic tile upper surface sets up the concave surface for the rainwater can reside for a longer time, and the rainwater can continue to produce the photocatalysis after rainy day sunny, and light sensing device sets up at the concave surface, makes the rainwater trigger power supply system when darker, and the degradation of continuous power supply carrying out the pollutant.

Example 4:

on the basis of the embodiment 3, the improvement is made that the photovoltaic power generation device is arranged on the partial surface area of the light response floor tile, as shown in figure 2; each floor tile is an independent system, so that space can be saved, and utilization efficiency and construction efficiency are improved.

Example 5:

on the basis of the embodiment 4, the light response floor tiles are laid in the bank laying areas of the polluted river channels or the landscape water bodies, as shown in fig. 3, when rainfall occurs and surface runoff flows into the river channels or the landscape water bodies in a confluence manner and passes through the light response floor tiles, the concentration of rainwater pollutants can be reduced;

when no runoff is converged, the circulating device arranged in the river channel or the landscape water body is started, and the horizontal overflow weir is arranged at the water outlet, so that the river water is uniformly distributed in the river bank laying area and flows back to the river and/or the landscape water body, and the water body is fully treated. Through detection, the pollutant concentration in the surface runoff of the area where the light response floor tile is laid is obviously reduced. The purpose of in-situ treatment of the surface source pollutants is realized.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art can make modifications and equivalents without departing from the spirit and scope of the present invention, which should be construed as being limited only by the claims.

Claims

1. A landscape water treatment process is characterized by comprising the following steps:

1) paving floor tiles in a pavement, square, river bank laying area or open parking space, wherein the floor tiles are light response floor tiles;

2) the rainwater falls to the photoresponse floor tile and then generates a photoelectrocatalysis reaction, and then the rainwater converges to a collection system; in addition, a photovoltaic power generation device is arranged for collecting electric power, the photo-response floor tiles are powered on rainy days or at night, electrocatalytic oxidation is realized under the action of low voltage, and pollutants in water are removed; in a sunny state, sunlight irradiates the light response floor tile to generate a photocatalytic reaction, and iron, carbon, copper and aluminum in the floor tile generate a photoelectrocatalysis effect under the action of photoelectrons, so that pollutants in a polluted water body are strongly degraded;

3) detecting the water collected by the collecting system, directly discharging the water into a landscape water body when the water quality reaches the standard, introducing the water into the next conventional water treatment process for treatment if the water quality does not reach the standard, and discharging the water into the landscape water body after the water quality reaches the standard; when the water quality of the landscape water body does not reach the standard, the landscape water body is discharged to the area where the photoresponse floor tiles are laid through the backflow system for treatment, and then the landscape water body is circulated back;

the photoresponse floor tile is characterized in that additives are added during the preparation of the water permeable tile, wherein the additives are iron, carbon, titanium dioxide, copper and aluminum, and the addition amount of the additives is 2-5% of the weight of the water permeable tile; in the additive, 30-40 wt% of iron, 30-40 wt% of carbon, 10-15 wt% of titanium dioxide, 5-10 wt% of copper and the balance of aluminum are contained, and electrodes are arranged in the photoresponse floor tile and are a cathode and an anode.

2. The process of claim 1, wherein: the photovoltaic power generation device is arranged outside the floor tile, stores the converted electric energy in a power supply system and supplies power to the cathode and the anode through leads; the power supply system is connected with an external power supply, and the external power supply is a battery or municipal power.

3. The process of claim 2, wherein: and the controller is used for turning off the power supply system, and when the external sunlight intensity is low and does not accord with the photocatalysis condition, the signal is transmitted to the controller, and the controller turns on the power supply system.

4. The process of claim 3, wherein: the photovoltaic power generation device and the light sensing device are both arranged in partial areas of the upper surface of the light response floor tile; each floor tile is an independent system.

5. The process of claim 1 or 3, wherein: the photoresponse floor tile is paved in a river bank paving area of a polluted river channel or a landscape water body, a circulating device is arranged, and an overflow weir is arranged at a water outlet, so that river water uniformly distributed in the river bank paving area flows back to a river.