Discussion on electroplating and printed circuit board wastewater treatment
Thread Content
I’ve noticed that in our forum, there are relatively few discussions on the treatment of wastewater related to electroplating, circuit boards, and pre-treatment processes. Now everyone can share here their experiences and insights on how to handle such wastewater. Thank you! For example, dealing with copper-ammonia complex wastewater remains a challenge at present. For some time I used the iron-carbon internal electrolysis method to treat such compounds, and the results were fairly good; however, some caking still occurred. After aeration, the effect improved significantly.
Reply to 1# hbbxa: It seems like you haven’t run it long enough; even aeration won’t help if the running time is too short!
If it’s still compacted, I’ll give you a method. It’s a drum-type iron filings filter. It definitely does not compact. Reference.
A new technology called MVR has just been introduced in the country. This technology is particularly effective in treating wastewater that is difficult to handle using traditional methods; it also allows for the recovery of metals from such wastewater. Moreover, it is energy-efficient – one MVR evaporator is equivalent to 10 multi-effect evaporators. It’s worth giving it a try^_^
This post was last edited by zfc318 on 2010-8-31 08:11. Is a drum-type scrap iron filter something that rolls while treating wastewater? Let me find out.
I’ve also never come across the new MVR technology; could you explain in detail its principle and performance characteristics? Thank you! !
The heat pump evaporator continuously compresses and recycles steam.
This post was last edited by zfc318 on 2010-9-3 09:51. Reply 7# ljtcchem: Do not mislead everyone. MVR (mechanical Vapor Recompression) indeed involves using mechanical devices to compress and reuse vapor. But it is not a heat pump application; the core device is a mechanical compressor. Heat pumps and MVR are very easy to confuse. A heat pump is a device that can extract low-grade thermal energy from the air, water, or soil in nature; through the use of electrical power, it converts this energy into high-grade thermal energy that can be utilized by people.
Reply to 3# ipgood: It doesn’t cause caking, but the equipment is rather complicated and has high energy consumption. They should all be working on that shaped filler right now
First, resin is used to recover copper from wastewater; the high-concentration copper solution obtained through resin desorption can be sold as a product, with specialized companies handling its recovery. Ammonium chloride is recovered from the resin effluent through evaporation; otherwise, the ammonia nitrogen level is too high to allow discharge. gfmin@126.com