1.生活污水厂二沉池排出的剩余活性污泥;
2.自来水厂沉淀池或浓缩池排出的物化污泥;
3.工业废水处理产生的经浓缩池排出的物化和生化混合污泥,如造纸厂、印染厂、水洗布厂、石油化工厂、有机化工厂、肉联厂及啤酒厂等等;
4.工业废水处理产生的经浓缩池排出的物理法和化学法产生的物化细粒度污泥,如电镀厂、线路板厂等等;
5.工业废水处理产生的物化沉淀中粒度污泥,如钢铁厂脱硫除尘污泥、制碱厂盐泥、铝厂赤泥、陶瓷厂污泥、彩管厂污泥、石灰中和沉淀污泥等等;1, high refractoriness, the main chemical compositions for silicon drift beads, aluminum oxide, silica (SiO2) about 50-65%, 3 oxidation 2 aluminium (Al2O3) about 25-35%.Because the melting point of silica (SiO2) is as high as 1725 degrees Celsius, 3 oxidation 2 aluminium (Al2O3), the melting point of 2050 degrees Celsius, are all high refractory material.Therefore, drift beads have h江苏造纸厂聚丙烯酰胺的选择和价格多少是合理的pam
4、配成的溶液不要用离心泵转移,以高速旋转的叶片造成聚合物的剪切降解,配制的具体方法如下:
在溶器(如实验的烧杯,工厂的配制罐)中加入一定量的清水,按清水量及浓度计算所需的粉状聚合物量,称出聚合物;
开启电动搅拌器,将清水搅拌出漩涡,搅拌器叶片未端的线速度不要超过8米秒,以免造成聚合物降解,但又不能太慢,以免聚合物颗粒浮在水面上,或在水中下沉、结团;
将聚合物缓缓撒入水的漩涡中,直到撒完。注意聚合物颗粒进入水里后不能性互相粘连、结团。然后再搅拌一段时间,使聚合物颗粒充分溶解,最后成为均匀、透明、粘稠的溶液无肉眼可见的团块。
这段搅拌时间按下面方法确定:
A、在夏季水湿较高时,阴、阳离子型聚合物需搅拌1小时左右,非离子聚合物需搅拌2小时左右;
B、在冬季水温较低时,阴、阳离子型聚合物搅拌1.5小左右,非离子聚合物需搅拌3小时左右;
还有,配制浓度越高,聚合物溶解速度越快。溶解不均匀或不充分会影响使用效果。
粉状的聚丙烯酰胺在干燥、阴凉的地方可存放二年以上,但配成溶液后,其存放时间就很有限。一般说,溶液浓度为0.1%时,非阴离子型聚合物溶液不超过一周;阳离子型聚合物溶液不超过一天。溶液稳定性与浓度有关,配的越浓(陈吉宁指出,生态环境问题归根到底是在不同的发展阶段以什么方式发展的问题,环保工作最根本的是要处理好经济发展与环境保护的关系,当前难点是在寻找新动能和处理老问题之间igh refractoriness, generally 1600-1600 degrees Celsius, make its excellent high performance refractories.
2, light, heat preservation and heat insulation: drift beads thin wall hollow, empty cavity for half a vacuum, only trace amounts of the gas (N2 and H2 and CO2, etc.), heat transfer is very slow.So drift beads not only light (250-450 kg/m3 density), excellent heat preservation and heat insulation and thermal conductivity at room temperature (0.08-0.1), which play a prominent role in the field of lightweight thermal insulation material for its laid a solid foundation.
3, high hardness, high strength: because of drift beads on silicon aluminum oxide mineral phases (quartz and mullite) formation of hard vitreous, hardness of Morse 6-7, hydrostatic strength up to 70-140 mpa, true density of 2.10 2.20 g/cm3, therefore, drift beads with high strength.General light porous or insulating materials such as boiling rocks, diatomite, perlite, sea pumice, expanded vermiculite is the difference in hardness, strength is poor, with its system of thermal insulation products or light refractory products, intensity difference flaws.The advantages of their shortcomings is drift beads, so drift beads have more competitive advantag
6.工业废水处理产生的物化沉淀粗粒度污泥:如洗煤厂尾泥、玻璃厂石英渣等等;
按污泥的机理性能以及处理难度又可分为以下几种:
1、亲水性、微细粒度有机污泥,可压缩性能差,脱水性能差。如上述第一种
2、中细粒度有机与无机混合污泥,可压缩性能和脱水性能一般。 如上述第二种