Water treatment equipment common sense knowledge is introduced
Activated carbon adsorption degradation main characteristic is the specific surface area and pore structure of activated carbon.
Per 1 g of carbon surface area of 1000 square meters, including most of the tiny pores inside the particles surface, due to the adsorption is dissolved impurities in carbon particles on the surface of the water enrichment process, so the specific surface area of carbon are the important factors that affect the adsorption performance.
Due to the large surface area of activated carbon, and thus show good adsorption performance.
Most larger organic molecules, aromatic compounds, halogenated hydrocarbon, etc can firmly adsorbed on activated carbon on the surface or in the pore, and the humus, synthetic organic matter and low molecular weight organic matter has obvious removal effect.
Practice has proved that activated carbon can reduce total organic carbon TOC, total organic halide TOX, and total trihalomethanes TTHM indicators, etc.
Biological activated carbon: it is to point to by ozonation and activated carbon adsorption combined water treatment technology.
The characteristics of biological activated carbon is: complete biological nitrification convert NH4 + -n to NO -
Will have a biological oxidation of dissolved organic matter and can remove the mg/l level concentration of dissolved organic carbon (
And THM formation potential (
, and ng/l & mu;
G/l level of organic matter.
Add a small amount of oxidant (in the water
Commonly used O3)
, is the purpose of dissolved and colloidal organic matter can be converted to more easily biodegradable organic matter, will be some high humus oxidation of low molecular weight, molecular weight easily biodegradable material and become carbon bed microbial source of nutrients.
In activated carbon bed, organic adsorption on the surface of granular and small pore, microbial growth on the surface of the carbon granule, big hole, through the effect of enzyme will some organic matter degradation, so the removal of organic matter lies in the dual role of adsorption and biodegradation.
Membrane treatment technology of pressure as the driving force of membrane separation technology with reverse osmosis (
, nanofiltration (
And microporous filter (
The characteristics of membrane separation technology is able to provide stable and reliable quality, due to the membrane separation is the main principle of the mechanical sieving of impurities in the water, so water quality is very stable, is just on the basis of the size of the membrane pore size, has nothing to do with the raw water quality and operating conditions.
Disinfection of drinking water treatment, destroy the living water in the vast majority of pathogens, microbes water quality meet the requirement of human health, and called the disinfection.
Ozone, halogen and halogen compounds of this type of disinfectant is by destroying pathogens basic physiological function units, such as enzyme, coenzyme and hydrogen carrier and inactivated disease yuan body.
Several kinds of disinfectants to kill efficiency and stability of comparison: killing efficiency: ozone> chlorine dioxide chlorine>> chloramine stability: chloramine> two chlorine>> chlorine oxygen China ozone oxidation reduction potential: 2.
50 v 1。
3 v and ozone has strong oxidation, easy to dissolve into oxygen and ozone, no any constitutes a harm to human body in the water.
But the cost is high, basically is not used for large waterworks, and because of its high oxidation on commonly used in the depth of the water treatment.