CAJ | 학술논문

采用纳滤膜法对电镀镍漂洗废水及金属镍的在线回用进行中试研究，维持pH、TDS、电导率、温度等条件不变，改变操作条件，研究了操作压力、进水流量、料液浓度、运行时间、产水比对膜分离性能的影响。研究结果表明，增加操作压力、进水流量、料液浓度都可提高Ni2+截留率及浓缩倍数；保持各影响因素恒定运行时，纳滤膜对Ni2+截留率及浓缩倍数随运行时间的延长逐渐增大，稳定运行40 h后接近最大截留率及最大浓缩倍数，截留率达75%左右，浓缩倍数在6.2倍左右；产水比对Ni2+截留率有较大影响，产水比为1∶1、进水流量为6 t/h时，Ni2+截留率为65.7%，浓缩倍数为2.4倍。
채용납려막법대전도얼표세폐수급금속얼적재선회용진행중시연구，유지pH、TDS、전도솔、온도등조건불변，개변조작조건，연구료조작압력、진수류량、료액농도、운행시간、산수비대막분리성능적영향。연구결과표명，증가조작압력、진수류량、료액농도도가제고Ni2+절류솔급농축배수；보지각영향인소항정운행시，납려막대Ni2+절류솔급농축배수수운행시간적연장축점증대，은정운행40 h후접근최대절류솔급최대농축배수，절류솔체75%좌우，농축배수재6.2배좌우；산수비대Ni2+절류솔유교대영향，산수비위1∶1、진수류량위6 t/h시，Ni2+절류솔위65.7%，농축배수위2.4배。
The pilot scale study on the on-line reuse of nickel and nickel electroplating rinsing wastewater by nano-filtration membrane method has been conducted. When the pH,TDS,conductivity,temperature and other conditions remain unchanged,changing the operation conditions,the effects of pressure,influent flux,feed liquid concentration, operation time,and water production ratio on nano-filtration membrane separating capacity are studied. The results show that increasing operation pressure,influent flux and feed liquid concentration can raise the Ni2+rejection rate and concentration multiple. With the influencing factors unchanged and under stable operation ,by nano-filtration membrane,Ni2+rejection rate and concentration multiple are gradually raised with the extension of operation time. After it runs stably for 40 h,the rejection rate and concentration multiple gets close to the maximum:rejection rate is about 75%and concentration multiple about 6.2 times. Water production ratio has greater impact on Ni2+rejection rate. When water production ratio is 1∶1,and influent flux is 6 t/h,the maximum rejection rate of Ni2+is 65.7%,maxi-mum concentration multiple is 2.4 times.