REDESIGN OF BIOLOGICAL PROCESS USING MOVING BED BIOFILM REACTOR TO INCREASE CAPACITY IN INTEGRATED WASTE WATER TREATMENT PLANT OF CISIRUNG

• Main Author: RAUDHAH RIYANTO (NIM : 15313056), ARLIEZA
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/21250
• Institution: Institut Teknologi Bandung

Textile industry in Indonesia is one of the industries that experiencing rapid development with <br /> <br /> <br /> high level of production. Mohammad Toha which is located in South Bandung, have a large <br /> <br /> <br /> number of textile industry, as many as 85 industries in the area of 178.7 ha. Environmental <br /> <br /> <br /> problems especially water pollution may occur as a result of the textile industry activities, because <br /> <br /> <br /> it produced wastewater in large quantities that contains high BOD, COD, and heavy metals. <br /> <br /> <br /> Before the wastewater discharged into water bodies, it has to be treated first in order to prevent <br /> <br /> <br /> water pollution. Discharging textile wastewater have to comply the effluent standard in Ministry <br /> <br /> <br /> of Environment Regulation number 5 year of 2014 or the specific local regulation. Textiles are <br /> <br /> <br /> manufactured using complex chemical compounds that are relatively difficult and takes a long <br /> <br /> <br /> time to be degraded. Therefore, we need a process to accelerate the degradation process, one of <br /> <br /> <br /> which is by using biological processes. Biological treatment has advantages such as cheaper and <br /> <br /> <br /> produce less sludge rather than physical and chemical treatment. WWTP Cisirung has a land area <br /> <br /> <br /> of 1.2 hectares and serves as many as 25 industries in total (food and textile industries). Average <br /> <br /> <br /> discharge waste out of the industry is 206.61 L/s and discharge actually processed is 82.48 L/s. <br /> <br /> <br /> This processing consists of three main processes; physics processing, chemical processing, and <br /> <br /> <br /> biological treatment. Along with the increasing development of the textile industry, it is necessary <br /> <br /> <br /> to evaluate the units that already exist in the WWTP. Capacity improvement plan and redesign of <br /> <br /> <br /> the WWTP needs to be done in order to increase the effectiveness of the WWTP. These plans will <br /> <br /> <br /> focus on biological processes and it is expected that quantity and quality of the treated waste water <br /> <br /> <br /> can be increased. The proposed alternatives of this treatment are Moving Bed Biofilm Reactor <br /> <br /> <br /> (MBBR) One Stage, Moving Bed Biofilm Reactor (MBBR) Two Stage, and Integrated Fixed Film <br /> <br /> <br /> Activated Sludge. The selection of alternatives is according to the analysis of treatment <br /> <br /> <br /> performance and effectiveness using calculation, operational aspects, economic aspects (OPEX <br /> <br /> <br /> and CAPEX), environmental aspects and non technical aspects. This alternative is chosen based <br /> <br /> <br /> on the suitability of this unit in treating textile waste water which is beneficial economically and <br /> <br /> <br /> also increasing the efficiency. The chosen alternative is the Two Stage MBBR system. Detail <br /> <br /> <br /> calculation is also done with the aim to find the right dimensions that fit into the land in IPAL <br /> <br /> <br /> Cisirung. The biological treatment used in IPAL Cisirung was contact stabilization system with a <br /> <br /> <br /> length of 12 m and width of 6 m for the aeration tank. The design result of the Two Stage MBBR is by using a square aeration tank and completely stirred tank reactor with the influent planned <br /> <br /> <br /> discharge is 350 L/s. Calculations performed on the MBBR system are consisted of an aeration <br /> <br /> <br /> tank and clarifier tank. In the first stage, aeration tank has dimensions of 5,5 m x 5,5 m x 5 m for <br /> <br /> <br /> length, width and depth with HRT is 4,915 hour. In the second stage the aeration tank has <br /> <br /> <br /> dimensions of 6 m x 6 m x 5 m for length, width, and depth with HRT is 2,269 hour. Total HRT is <br /> <br /> <br /> 7,185 hour. Media used in this MBBR is AnoxKaldnes K3 with surface area of adhesive media <br /> <br /> <br /> more than 500 m2/m3 and media fraction that is 40% from tank volume. After passing through <br /> <br /> <br /> MBBR process the effluent will go to secondary clarifier which modified by using tube settler <br /> <br /> <br /> because of high level of overflow. The dimensions for the secondary clarifier are the same as the <br /> <br /> <br /> existing unit. The sludge handling required in accordance with the sludge produced of the MBBR <br /> <br /> <br /> system is gravitational thickening and sludge drying bed. The results of this plan will be followed <br /> <br /> <br /> with technical drawing. Non-technical analysis for selected alternatives such as cost budgeting <br /> <br /> <br /> plans, risk analysis, life cycle assessment, sustainability, uncertainty, and environmental impact <br /> <br /> <br /> will be discussed in this report.