KR20010048831A - height well water at its purest equipment - Google Patents

Abstract

PURPOSE: Provided is raw water pre-treatment using a microorganism media filter and an advanced water purifying process such as a microorganism activated carbon process, an ozonation process to produce good quality tap water. CONSTITUTION: According to this treatment method, suspended solids are removed in a sedimentation tank, and water is traveled through a chemical mixing tank and a flocculation tank. Water and air flow count current through the microorganism media filter to completely contact each other, and media consists of zeolite carbon or broken granular activated carbon from the microorganism activated carbon process. After raw water is pre-treated by the microorganism media filter, water is traveled through the ozonation process and the activated carbon process to be purified.

Description

Preliminary water treatment and advanced water purification equipment by biofilm filtration {height well water at its purest equipment}

The present invention relates to a water purification pretreatment and advanced water purification apparatus by biofilm filtration, and to add a biofilm filtration pretreatment process and a subsequent biofilm activated carbon process BAC (ozone + GAC) or granular activated carbon process (GAC) to produce high quality tap water. It was made possible.

In the past, most of Korea relies on surface water such as rivers and lakes for drinking water, so water pollution to drinking water has become a serious national problem. In particular, the water quality of drinking water in Busan and Gyeongnam, which is located in the lower part of the Nakdong River, has deteriorated to grade 4 to 5 and has reached the state where it cannot be used as water supply.

In order to improve the water supply, pre-chlorination or pre-zonation treatment is currently performed, but in the former case, THMs, which are carcinogens, and in the latter case, ammonia nitrogen (NH ₄ -N) has not been eliminated, such as not being removed, and the distrust of tap water is deepening.

Existing ozone and advanced water purification systems using ozone and granular activated carbon (BAC) have insufficient effect of ozone treatment and almost no NH ₄ -N has been removed, and the removal rate of various pollutants such as BOD and COD is very low. In the rapidly deteriorating state, the life of the BAC process is broken in a very short time, which makes it difficult to effectively purify the water, and frequent backwashing or the life of the BAC process is very short, requiring the replacement of granular activated carbon. There was no choice but to.

If the existing rapid filtration system is a follow-up process, the land area such as flocculation settler and rapid sand filtration paper is widely required, and the cost of running the water purification system is inevitably increased due to the large amount of flocculating chemicals and excessive sludge generation. .

The present invention has developed a raw water pretreatment and advanced water purification device using a biofilm filtration process to solve the above-mentioned waste.

This method simultaneously removes odor-causing substances such as contaminants such as DOC, COD, THMFP, BOD, SS, Color, E ₂₅₄ , Chla, and KMnO ₄ consumption in raw water, while eliminating ammonia. By removing the raw water quality can be improved from 4 to 5 grades to 1 to 2 grades, the invention is invented a device capable of supplying a good quality of raw water is described in detail according to the embodiment.

1 is a water treatment process diagram of the present invention.

2 is a conventional water purification process.

Figure 3 is a water supply pretreatment apparatus of the present invention.

4 is an elevation water purification apparatus of the present invention.

5 is a biofilm filtration device using a conventional sedimentation basin.

Figure 6 is a detailed view of the biofilm filter paper of the present invention.

<Explanation of symbols for main parts of drawing>

1; settled paper 2; chemical mixing paper 3; floc forming tank 4; biofilm filtration process

5; ozone process 6; bioactive carbon (BAC) process a; inlet pipe b; discharge pipe

c; air injection pipe d; backwashing pipe

Example 1

Biofilm filtration process through the floc forming tank (3) which removes the soil and SS from the raw water from the sedimentation basin (1) and mixes and mixes it in the chemical mixing paper (2) to convert the fine suspended solids in the water into large particles so that they are precipitated. 4) is passed through the discharge pipe (b). At this time, the biofilm filter paper is a counterflow type of the inflow pipe (a) and the air injection pipe (c). When the dissolved oxygen is high, air injection is unnecessary and the filter medium is filled with the broken carbon activated carbon fiber ball filter of the zeocarbon or BAC process. . If the filling medium layer is blocked, backwash water is supplied to the backwashing tube (d).

Example 2

In order to improve the existing water purification plant where there is no extra site to install the biofilm filter paper, the Honeycomb or the biofilm filtration process (4) is laid in the sedimentation basin (1), pretreated by biofilm filtration, and then the ozone process (5) and the subsequent process Purified by passing through the activated carbon (BAC) step (6).

Example 3

After the raw water pretreatment by the biofilm filtration step (4), the ozone step (5) is passed through a bioactive carbon (BAC) step (6) supported by a residue or coarse sand layer to purify the water.

Depending on the raw water quality and the water temperature, the water passed through the biofilm filtration process (4) is sent to the bioactive carbon (BAC) process (6) through a by-pass pipe without undergoing the ozone process (5) for water purification.

In the raw water pretreatment apparatus using the biofilm filtration process (4) of the present invention purified through the above-described embodiment, the microbial membrane attached to the surface of the media is the inflow settlement (1) and the suspended organic matter as well as the dissolved organic matter in the chemical mixing tank (2). Since the floc is formed in the floc forming tank (3) to oxidatively decompose the incoming water, it is very suitable for raw water pretreatment as it can be purified and filtered during the ozone process (5) and the bioactive carbon BAC process (6). . In particular, the filtration rate of the biofilm filtration process (4) is 100 to 120 m / day or more (hundreds of m / day depending on the filter medium), and the pretreatment effect can be expected to be about the same area as that of the rapid filter paper. Can be. The raw water quality treatment effect of the raw water pretreatment device by the biofilm filtration process (4) is NH ₄ -N 95-100%, BOD 70-80%, COD 50%, DOC 50% or more, THMFP 50%, turbidity 95% or more The removal rate was 70-80%, SS 100%, Chl-a 90%, E ₂₅₄ 60%, and KMnO4 consumption 50%.

The process linked after the biofilm filtration process (4) is composed of a bioactive carbon (BAC) process (6) by a post ozonation process (5) and granular activated carbon process. During high turbidity and water deterioration, the floc forming tank 3 installed at the front end of the biofilm process can be removed by the flocculation process, and the post ozone process 5 may be omitted depending on the degree of incorporation of the flocculant in the chemical admixture paper 2. . This method is used to upgrade existing rapid filtration systems to advanced treatment systems by biofilm filtration.

The following table is a comparison table of the operating conditions of the process line and the previous line of the present invention.

The following table is a comparison of the experimental results for the average influent water quality of the process of the present invention and the previous process line.

The following table is a comparison of the experimental results during high turbidity inflow and water quality of the process of the present invention and the previous process line.

It can be seen that the pretreatment device and the advanced treatment device of the present invention can greatly contribute to water quality improvement and water purification improvement of urgent water source, and when the biofilm filtration process is introduced in the state of existing water purification facilities, the sedimentation basin The installation of a biofilm filtration process in part of the can ensure sufficient remaining land in the sedimentation basin and make the water treatment plant more effective.

Claims (3)

When the soil or SS in the raw water is removed from the settling paper (1), the biofilm filtering paper is passed through the biofilm filtration process (4) through the chemical mixing paper (2) and the floc forming paper (3) and passed through the outlet pipe (b). The flow of the raw water inlet tube (a) and the air of the air inlet tube (c) is a countercurrent type so that the raw water and air are in sufficient contact with each other. When the dissolved oxygen is high, air injection is unnecessary and the media is zeocarbon or bioactive carbon ( BAC) Preliminary water treatment and advanced water purification equipment by biofilm filtration, characterized by filling the broken granular activated carbon or fiber ball media in step (6) and supplying backwash water to the backwash tube (d) when the filler media layer is blocked. . According to claim 1, in the case of an existing water purification plant that does not have a site for installing a biofilm filtration process in a water purification plant, a honeycomb or a biofilm filtration process (4) is installed in a sedimentation basin (1), followed by pretreatment by biofilm filtration, followed by an ozone process. (5) and the BAC process (6) to pass through the purified water raw water pretreatment and advanced water purification device, characterized in that the purified water. The biofilm filtration process according to claim 1, wherein the biofilm filtration process (4) is followed by a pretreatment by the biofilm filtration process (4), followed by an ozone process (5), followed by a bioactive carbon (BAC) process supported by a coarse brown or coarse sand layer. Water purification preliminary water treatment and advanced water purification device by biofilm filtration, characterized in that the water passed through (4) is sent to the biodecombusted charcoal (BAC) process (6) through the By pass pipe without passing through the ozone process (5) .