Study of Coagulant Effective Dose for Water treatment Plant in Semarang City
Izzati Istihara, Lailatus Siami*, Ratnaningsih
Environmental Engineering Departement, Faculty of Landscape Architecture and Environmental Technology, Universitas Trisakti, Jakarta, Indonesia
Abstract
Water is an important component on earth which community need, especially for clean water consumption. Water treatment plant is one of the solutions as fulfillment of clean water needs that guaranteed quality, quantity and continuity. The aim of this research to determine the effectiveness of coagulants type in water treatment plant planning by using Blorong River as raw water in Semarang City, according to the requirements of water quality of drinking of health minister of Republic Indonesia 492/2010 law. The research using jartest methods by observing the influence of coagulants type consisting of poly aluminium chloride (PAC), alumunium sulfat and chemical mixing alum towards turbidity, pH, iron, zinc, copper, total suspended solid (TSS), and total dissolved solid (TDS) as a parameter observed in two different seasons. The influence of each coagulant also varied with several velocity gradients. It is expected can be specified coagulant type with the ability to decrease those parameters in accordance with drinking water quality requirements which has the most affordable price.
Keywords: Jartest, Poly Aluminium Chloride (PAC), Alumunium Sulfat, Chemical Mixing Alum, Velocity Gradient
Topic: Environmental Engineering