Pharmaceutical wastewater water quality characteristics and treatment methods

Pharmaceutical industry production model of complex processes, large amount of raw material injection, raw material utilization rate is low, making the pharmaceutical wastewater in a wide range of pollutants, chemical composition is complex and varied, and the concentration of pollutants in pharmaceutical wastewater is very high. Biological activity inhibitory ability is strong, due to the biopharmaceutical wastewater contains a large number of antibiotics, when the content of more than 100mg / L, will be on the pharmaceutical wastewater treatment process of aerobic activated sludge inhibition. Wastewater has high chromaticity, which can be hundreds or even thousands of times higher than normal water. Due to the complexity of the wastewater composition, which contains a high concentration of difficult to biodegrade, and even toxic and harmful polymer substances, making the pharmaceutical wastewater treatment is much more difficult.

Pharmaceutical wastewater treatment methods

Physical treatment technology

1. adsorption technology

Commonly used adsorption technology according to the different types of adsorption, can be divided into ion adsorption, physical adsorption and chemical adsorption and other three categories; Usually used in pharmaceutical wastewater physical adsorption technology in the adsorbent mainly includes activated carbon, activated coal, humic acid and adsorption resin.

2. Air flotation technology

The mechanism is highly dispersed tiny vapor packets as a carrier, the pollutants in the wastewater adsorption to the bubble, so that the density of pollutants and their adsorption carriers is lower than the normal density of the wastewater, appeared to float, to realize the separation process between the solid and the liquid and the liquid to the liquid.

3. Coagulation and precipitation

Add a certain amount of coagulant to the wastewater, through physical mixing, so that the wastewater in the form of colloidal form of a large number of organic, inorganic and high content of fluoride ions to lose the surface charge, the occurrence of mutual collision, focusing into a larger particle size of the material, under the action of gravity to sink, so that the pollutants and the separation of the effect of the water body.

Chemical treatment technology

1. Chemical agents

In the wastewater injection of chemicals, such as ammonia nitrogen agents, phosphorus removal agents, heavy metal traps, treatment and removal rate of up to 96%, can be used in a short period of time, emergency conditions.

2. Ozone oxidation method

The use of ozone itself has a strong oxidizing properties, can be difficult to degrade organic pollutants in wastewater oxidation and decomposition, so that part of the ring in the wastewater ring molecules to produce open ring or long chain molecules in some of the chain to break the chain, which makes the wastewater of the macromolecules, difficult to degrade the class of pollutants into small molecules, easy to degrade the class of substances, significantly improve the biochemistry of the wastewater.

Biological treatment technology

1. Anaerobic activated sludge

The normal metabolism of Anaerobic Microorganisms and alkaline microorganisms is utilized to degrade the complex organic matter present in the wastewater into chemically stable water, carbon dioxide and methane. The metabolic process of Anaerobic Microorganisms is also called anaerobic digestion.

2. Anaerobic + aerobic coupled biological treatment technology

Conventional anaerobic biological treatment technology can withstand higher concentrations of organic matter in the influent water and the influent water complex, but the conventional anaerobic biological treatment technology has a more complex process operation and management, the effluent is difficult to meet the standards and other shortcomings.

For this reason, the conventional anaerobic biotechnology and aerobic biotechnology for organic tandem, anaerobic biological treatment technology and aerobic biological treatment technology to give full play to their respective advantages at the same time, but also to make up for their respective shortcomings.