Open AccessThe Effectiveness and Cost Optimization of Coagulant Aluminum Chlorohydrate (ACH), Aluminum Sulfate (AS), and Poly Aluminium Chloride (PAC) in Coagulation Process at The PT. Pupuk Sriwijaya (PT. Pusri) Utility Unit
Author(s) -
Dedi Teguh,
Tuty Emilia Agustina,
Muhammad Hafiz Ridho,
Nurdiana Febriyanti,
Dewi Ermaya
Publication year - 2022
Publication title -
ijems (indonesian journal of environmental management and sustainability)
Language(s) - English
Resource type - Journals
eISSN - 2598-6279
pISSN - 2598-6260
DOI - 10.26554/ijems.2022.6.1.189-195
Subject(s) - coagulation , turbidity , raw water , aluminium , aluminium sulfate , water treatment , sulfate , chloride , water quality , pulp and paper industry , environmental science , chemistry , environmental engineering , engineering , organic chemistry , geology , psychology , ecology , oceanography , psychiatry , biology
PT. Pusri utilizes Musi River water as a source of process water. Colloidal particles suspended in Musi River water cancause blockage and build-up of scale on pipes and process equipment. Therefore, a good coagulation process is needed to reduce the content of colloidal solids suspended in water by using a coagulant. Coagulants that are often used for water treatment include ACH, AS, and PAC. The objectives of the study are to assess the Effectiveness and to optimize the usage of the coagulant ACH, AS, and PAC on decreasing the turbidity of Musi River water sample as a raw water in utility unit of PT. Pusri. The coagulation process was carried out by varying the concentration of each coagulant and adding 0.1 ppm of coagulant aid for all samples. Fast and slow stirring was carried out each at a speed of 150 rpm 30 rpm for 10 minutes. From the experiments conducted, it was found that the most efective coagulants to be used were ACH and PAC with the addition of a smaller coagulant dose of 12 ppm to achieve the standard water quality used at PT. Pusri. Meanwhile, the use of AS has higher eficiency when compared to ACH and PAC because it is more cost efective.