Competence of blended coagulants for surface water treatment

被引：9
作者：
Saritha, Vara [1 ]
Karnena, Manoj Kumar [1 ]
Dwarapureddi, Bhavya Kavitha [1 ]
机构：
[1] GITAM Deemed Be Univ, GITAM Inst Sci, Dept Environm Studies, Visakhapatnam 530045, Andhra Pradesh, India
来源：
APPLIED WATER SCIENCE | 2020年 / 10卷 / 01期
基金：
美国国家卫生研究院; 日本学术振兴会;
关键词：
Dissolved organic carbon (DOC); Turbidity; Blended coagulant; Dose; MORINGA-OLEIFERA SEEDS; NATURAL COAGULANTS; TURBIDITY; REMOVAL; FLOCCULATION; DESIGN;
D O I：
10.1007/s13201-019-1108-4
中图分类号：
TV21 [水资源调查与水利规划];
学科分类号：
081501 ;
摘要：
Owing to the advantages of the natural coagulants under study, the present objective is to study the efficiency of blended coagulants: alum and chitin; alum and sago; and alum + chitin + sago. In this attempt, we have reduced the quantity of alum dose and added increasing quantities of the natural coagulants. The surface water samples collected from nearby sources were analyzed for the following parameters pre- and post-treatment with the coagulants. Coagulation and flocculation experiments were carried out using conventional jar test apparatus. Turbidity removal was observed to be nearly 99.29% at all pH ranges and doses. Removal of conductivity, solids and hardness was 58.83%, 32.03% and 33.33%, respectively. From the results obtained, it can be observed that the efficiency of blended coagulants in removal of various physicochemical parameters from the waters was better when compared to individual coagulants. The floc size in blend coagulants was larger than that of single coagulants. The data obtained in this study indicated the coagulation efficiency could be enhanced by using the blend coagulant.
引用
收藏
页数：11
相关论文
共 25 条
[1]  
Camp T. R., 1940, Journal of the American Water Works Association, V32, P1913
[2]   Utilization of plant-based natural coagulants as future alternatives towards sustainable water clarification [J].
Choy, Sook Yan ;
Prasad, Krishna Murthy Nagendra ;
Wu, Ta Yeong ;
Raghunandan, Mavinakere Eshwaraiah ;
Ramanan, Ramakrishnan Nagasundara .
JOURNAL OF ENVIRONMENTAL SCIENCES, 2014, 26 (11) :2178-2189
[3]   OPTIMAL-DESIGN OF A FLOCCULATOR [J].
DHARMAPPA, HB ;
VERINK, J ;
FUJIWARA, O ;
VIGNESWARAN, S .
WATER RESEARCH, 1993, 27 (03) :513-519
[4]   A preliminary evaluation of turbidity removal by natural coagulants indigenous to Venezuela [J].
Diaz, A ;
Rincon, N ;
Escorihuela, A ;
Fernandez, N ;
Chacin, E ;
Forster, CF .
PROCESS BIOCHEMISTRY, 1999, 35 (3-4) :391-395
[5]   Trends of dissolved organic carbon in surface water treated by innate coagulants [J].
Dwarapureddi, Bhavya Kavitha ;
Saritha, Vara ;
Srinivas, N. ;
Karnena, Manoj Kumar .
DESALINATION AND WATER TREATMENT, 2018, 136 :226-236
[6]  
Gidde MR, 2008, NAT C HOUS WAT TREAT
[7]   Optimising natural organic matter removal from low turbidity waters by controlled pH adjustment of aluminium coagulation [J].
Gregor, JE ;
Nokes, CJ ;
Fenton, E .
WATER RESEARCH, 1997, 31 (12) :2949-2958
[8]  
Halkude SA, 2013, INT J ADV RES ENG TE, V4, P181
[9]   Comparison and optimization of the performance of natural-based non-conventional coagulants in a water treatment plant [J].
Kaji, Atefeh ;
Taheriyoun, Masoud ;
Taebi, Amir ;
Nazari-Sharabian, Mohammad .
JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA, 2020, 69 (01) :28-38
[10]   Effects of storage conditions of Moringa oleifera seeds on its performance in coagulation [J].
Katayon, S. ;
Noor, M. J. Megat Mohd ;
Asma, M. ;
Ghani, L. A. Abdul ;
Thamer, A. M. ;
Azni, I. ;
Ahmad, J. ;
Khor, B. C. ;
Suleyman, A. M. .
BIORESOURCE TECHNOLOGY, 2006, 97 (13) :1455-1460
123