Emphasize a process controlling, resource reclaims, discharge harmless change, processing of tall salt waste water is a key
Since this year, in belt of economy of the Yangtse River special superintend and director checks environmental protection in waiting for the job, processing of water pollution of enterprise of chemical garden area, chemical industry makes the focal point that runs an attention, relevant processing market is warming up. But meanwhile, as ” 935 ” the key that industrial water pollution administers and difficulty, processing of chemical liquid waste still faces a lot of challenge such as management, technology, economy. What principle should processing of chemical garden area follow? What technology difficulty does prospective industry have be badly in need of a breakthrough? To this, the author interviewed Nanjing university to teach Li Aimin.
Chemical industry turns the waste water of industry industry subtly especially, have part complex, salinity and contaminant chroma noxiousness of tall, biology is big, difficult the characteristic such as degradation.
As we have learned, standard of photograph comparing abroad, at present liquid waste of our country chemical industry discharges the index such as attention COD, total nitrogen, total phosphor, had not involved the requirement to noxiousness. In the meantime, processing of garden area liquid waste also is industry difficulty, resource of processing of processing of processing of tall salt waste water, liquid waste of careful chemical industry, liquid waste deepness, liquid waste is changed waiting for technical research and development is trend of industry future development.
Processing of chemical garden area is badly in need of pursueing new pattern
Basis is process control, take-over resource of standardization, trash is changed, process science is changed, discharge harmless change need to carry out
Ask: At present processing of pollution of industrial garden area is industry attention key, you think, chemical garden area should realize true processing, what is among them key?
Li Aimin: The true normal treatment of chemical garden area manages, in the final analysis is the control of the process, want green, low carbon, loop, modes of life and relation to their environment.
Of existing garden area take-over means is the liquid waste that arranges the business take-over directly garden division sewage treatment plant, actual this kind take-overs the method is unscientific, because the liquid waste of a lot of enterprises passes biochemical treatment, and garden division sewage treatment plant is handled or give priority to with biochemistry, waste water is very hard again degradation. Want to take-over more scientific, answer to use biochemical method less as far as possible when fountainhead, sewage treatment plant wants to be given priority to with biochemistry, those who implement technology is complementary.
In addition, because poisonous contaminant is right biochemical system impact is bigger, it is very important to before take-overing, undertake noxiousness is controlled, because test difficulty causes virulence,detect at present however get very hard popularizing. The rate of oxygen of OUR(mud bad news that we are pushing at present) method, the photograph is righter than glow bacterium liquid waste but biochemical sex has more sensitive response to concern, the on any account that can carry mud to be worth in the OUR in different industrial waste water will judge liquid waste but biochemical sex and mud bear the ultimate rate of liquid waste noxiousness, and test time is convenient and short, quick, half hour can check ten sample.
Area of a few garden includes the division of garden of golden hill chemical industry of Shanghai now, a lot of be in pursue this kind of method, and should duplicate truly, the garden area foul water that still needs to pass long effort to be evaluation index in order to build with rate of oxygen of mud bad news take-overs standard.
Ask: In resource of chemical liquid waste what technology difficulty is there in changing? Whether to have corresponding technology and case practice? The aspect is changed in science of process of useless water treatment, what key needs to pay close attention to?
Li Aimin: On one hand, the aspect is changed in trash resource, in chemical liquid waste if poisonous and harmful material can try rich market recovers, the resource that realizes trash is changed, favorable environmental beneficial result and economic benefits will be obtained while processing is polluted. On the other hand, chemical industry, influence the generation large family that labour is useless salt subtly especially, of useless salt deal with to already became the bottleneck that restricts garden area development. Useless salt how resource is changed become one catastrophe to nod.
Be in raise farming group 300 thousand tons / year on industrial device, we apply colophony of compound function adsorption to receive pair of amino phenol in liquid waste to produce caustic soda back and forth, this one technology year reclaim about 900 tons pair of amino phenol of 98% , year the recycle that achieves 300 thousand tons of 20% salt solution, year resource changes value to make an appointment with 36 million yuan.