US 12,145,872 B1
High-efficiency and multifunctional sludge conditioner and preparation method thereof
Xu Kang, Guangdong (CN); Wei Zhang, Guangdong (CN); Qingjie Meng, Guangdong (CN); Shasha Qi, Guangdong (CN); Jiabao Zhang, Guangdong (CN); Yanmei Wang, Guangdong (CN); Binger Zeng, Guangdong (CN); Xue Xu, Guangdong (CN); Lingling Cao, Guangdong (CN); and Xianbiao Tang, Guangdong (CN)
Assigned to Shenzhen Shenshui Water Resources Consulting Co., Ltd., Guangdong (CN)
Filed by Shenzhen Shenshui Water Resources Consulting Co., Ltd., Guangdong (CN)
Filed on Jun. 11, 2024, as Appl. No. 18/740,275.
Claims priority of application No. 202311249109.4 (CN), filed on Sep. 26, 2023.
Int. Cl. C02F 11/147 (2019.01); C02F 11/00 (2006.01); C02F 11/148 (2019.01); C02F 101/20 (2006.01)
CPC C02F 11/148 (2019.01) [C02F 11/004 (2013.01); C02F 2101/20 (2013.01)] 6 Claims
 
1. A preparation method of a high-efficiency and multifunctional sludge conditioner, comprising the following steps:
S1. soaking and adsorbing bacterial cellulose in a sodium hydroxide solution with a concentration of 2-3 mol/L for 1-5 h, then taking out the bacterial cellulose and placing the bacterial cellulose in a tube furnace, introducing nitrogen, heating the tube furnace to 380-480° C. at a heating rate of 5-10° C./min, holding for 1-3 h, and cooling down and taking out the bacterial cellulose to obtain pretreated bacterial cellulose; and
S2. dispersing the pretreated bacterial cellulose in water, adding with an acrylamide monomer and an initiator for in-situ polymerization, and successively subjecting a reaction product to centrifugal separation, drying and crushing to obtain the high-efficiency and multifunctional sludge conditioner;
wherein an added amount of the acrylamide monomer is 30%-40% of a mass of the pretreated bacterial cellulose;
the pretreated bacterial cellulose has a porosity of 40%-60%;
the in-situ polymerization is conducted at a temperature of 50-80° C. for 4-8 h;
a cationic monomer is also added in step S2, and a molar ratio of the cationic monomer to the acrylamide monomer is 1:(2-5); and
the cationic monomer comprises one or more of dimethyl diallyl ammonium chloride, methacryloyloxyethyl trimethyl ammonium chloride, or acryloyloxyethyl trimethyl ammonium chloride.