Essence containing phenol wastewater treatment technology at home and abroad
Flavoring wastewater treatment at home and abroad in recent years are reviewed in this paper. the technology research status and research progress, development history, technology, emphatically discusses the physical and chemical treatment, biological treatment features and process of composite applications, the application prospect are discussed.
essence is one of the important additive in food, its demand in the global five year on average.
Growth of 4%, the flavoring industry is rising and expanding.
It is reported that in 2003 about 600 spices industry companies in China alone.
Due to the particularity of spices from the production wastewater quality in a high concentration and high toxicity of wastewater, the treatment is difficult, therefore, to search for effective treatment of difficult biochemical degradation wastewater this technology is very urgent and necessary.
1 flavors and the main characteristics of the wastewater containing phenol spices production due to its need cleaning products changing the reaction kettle, resulting in a fairly high pollutant concentration of sewage or reaction residue, CODcr in commonly 10000 ~ 60000 mg/L, BOD in 2000 ~ 10000 mg/L, different in wastewater PH, SS and chroma, odor, oil and other indicators, the difference is bigger.
Organic composition of wastewater contains a large number of aromatic hydrocarbons, aromatic compounds and their derivatives, as many as 2 o several, including toxic and harmful substances such as phenol, toluene, benzene, formaldehyde, etc. ;
In the washing in the reaction kettle, etc. A lot of surface active agent, therefore, high concentration of wastewater, water quality fluctuation is large, the water pollution composition is complicated, difficult to directly for biochemical treatment.
The essence part of wastewater containing phenol cases due to the complexity of raw water flavoring wastewater composition, high concentration, and with the constant improvement of the effluent water quality requirements, single wastewater treatment process is more and more not adapt to the current wastewater treatment, such as: physical and chemical treatment processes may treatment of high concentration organic wastewater, but harsh conditions, requirements for equipment is very high, and single physico-chemical treatment is very difficult to make out of the water, processing cost is higher;
Biochemical treatment method in dealing with the stability, water up to standard and reduce the cost has a great advantage, but how to improve the raw water biological availability, improve processing efficiency and impact resistant ability, development processing
Essence containing phenol wastewater treatment trend high concentrations, the toxicity under the condition of new strains of advantage is to solve the problem.
Traditional biochemical process, therefore, with the rapid development of the physical and chemical treatment method is the combination of spices to the inevitable trend of wastewater treatment, the matching of different biochemical processes and physical and chemical method is the foundation of treatment effect to guarantee, and can give full play to their strengths, each other to create the best reaction condition, ensure the treatment effect, achieve the unity of the economic and ecological benefits.
Centrifugal extraction machine containing phenol wastewater treatment process with centrifugal extraction machine essence, spice containing phenol wastewater treatment, the equipment is small in size, high efficiency, small dosage of extraction agent, can save a lot of the cost of extracting agent, removing phenol rate above 98%.
The current domestic companies in industrial wastewater emissions about 40 billion tons, including industrial waste water containing phenol about 0.
Around 5%, about 2 billion tons.
According to market research and forecasts domestic around 30% of the total discharge of industrial waste water containing phenol can use centrifugal removing phenol extraction machine, it will be altogether centrifugal extraction machine more than one thousand units.
Flavoring the inevitability of phenol wastewater treatment technology with the deepening of research, the essence of phenol wastewater treatment process will be more mature, more diverse, its application range and speed will be further intensified.
With high efficiency, low energy, simple operation to develop advanced processing method, will promote the further development of flavors and wastewater treatment.
the article source: network