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Method of removing PPCPs (Pharmaceutical and Personal Care Products) in drinking water by combination of ozone and activated charcoal

A technology of activated carbon and drinking water, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as cumbersome and difficult to control conditions, poor treatment effect, membrane fouling, etc. Achieve good removal effect

Active Publication Date: 2014-04-23
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional treatment includes coagulation, coagulation, precipitation followed by sedimentation and filtration, and the removal of PPCPs cannot be completely removed; the conditions in biological methods are cumbersome and difficult to control; physical methods to remove PPCPs mainly include activated carbon adsorption and membrane treatment technology, and activated carbon adsorption is susceptible to organic matter. Due to the influence of its own characteristics, it has a good removal effect on hydrophobic PPCPs, but the treatment effect on hydrophilic and polar organic matter is not good, and the concentrated pollutants in membrane treatment still need further treatment. At the same time, the membrane fouling problem is also a problem. An important late stage concern; chemical methods are costly and produce large amounts of toxic intermediates

Method used

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  • Method of removing PPCPs (Pharmaceutical and Personal Care Products) in drinking water by combination of ozone and activated charcoal
  • Method of removing PPCPs (Pharmaceutical and Personal Care Products) in drinking water by combination of ozone and activated charcoal
  • Method of removing PPCPs (Pharmaceutical and Personal Care Products) in drinking water by combination of ozone and activated charcoal

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Experimental program
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Embodiment 1B

[0030] The start of embodiment 1BAC and hanging film

[0031] The average water temperature for film formation is above 20.0°C, which is suitable for the growth of microorganisms and is conducive to film formation with activated carbon. The BAC column is made of plexiglass with a thickness of 5mm. The total volume of the reactor is about 8.1L, of which the volume of the filter area is about 6.53L, the volume of the water collection area is about 1.57L, the total height is 1.5m, the inner diameter of the water collection area is 100mm, and the inner diameter of the filter area 80mm, the activated carbon filling height is 1.0m, and the bottom is provided with supporting layers of gravel and coarse quartz sand, respectively, and the filling height is 0.1m to prevent the leakage of activated carbon. A sampling port is set every 0.1m from the bottom of the BAC column, and an overflow port is provided at the top of the column.

[0032] The main performance parameters of activated c...

Embodiment 2

[0035] The operation of embodiment 2 ozone-biological activated carbon combined process

[0036]The whole experimental device is composed of a water storage tank, an ozone generator, an ozone reaction column, a retention column, a biological activated carbon column, an ozone destruction device, and a backwashing device. The ozone reaction column and retention column are made of plexiglass, with a thickness of 5mm, a column height of 1.2m, and an inner diameter of 100mm. There is an air outlet on the top, and a sand core microporous aeration plate is added at the bottom of the ozone reaction column. Among them, for the BAC column after the natural film hanging, the activated carbon in the middle and lower layers has reached adsorption saturation, and there are few microorganisms attached to the growth at the same time. fill. The bottom is refilled with 0.7m of unused new granular activated carbon, and the top is refilled with 0.3m of granular BAC that has been successfully fil...

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Abstract

The invention discloses a method of removing PPCPs (Pharmaceutical and Personal Care Products) in drinking water by combination of ozone and activated charcoal. The method comprises the following steps: enabling ozone and aqueous liquor to be fully contacted by adopting a mode that gas and water are continuously and reversely contacted by means of ozone; then, carrying out further reaction through a retaining column, and then, enabling the obtained product to enter into a bio-activated charcoal column to be treated. The method disclosed by the invention can effectively remove PPCPs in drinking water, wherein the removal rate of carbamazepine, oxcarbazepine, progesterone and progesterone reaches over 99.9% while caffeine, antipyrine, aminopyrine and sulfamethoxazole are not detected in the effluent. Compared with existing drinking water treatment technologies, the method has higher chemical safety guarantee and meanwhile has a better removal effect on conventional pollutants in domestic drinking water. The effluent can stably reach the national sanitary standard (GB5749-2006) of domestic drinking water, so that the method has huge practical value and utilization potential.

Description

technical field [0001] The invention relates to a method for removing PPCPs in drinking water by combined use of ozone and activated carbon, and belongs to the technical field of water purification treatment. Background technique [0002] PPCPs contain many kinds of compounds, which can be mainly divided into two categories, namely drugs and personal care products. There are many types of drugs, which can include all kinds of prescription drugs and over-the-counter drugs widely used, such as antibiotics, pain relievers and anti-inflammatory drugs, stimulants, sedatives and hormones. There are also many types of personal care products, which can include: fragrances, sunscreens, sunscreens, germicidal disinfectants, etc. Drug use in humans and animals is the main anthropogenic source of PPCPs in the environment. When a human or animal body ingests a drug, it will undergo a series of biochemical reactions and only a small amount will be utilized, while the unconsumed drug and...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 缪恒锋阮文权姬小平徐丹瑶岳婵媛周勤
Owner JIANGNAN UNIV
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