MICROPLASTIC ABUNDANCE ANALYSIS WITH ORGANIC AND NUTRIENT REMOVAL EFFICIENCY OF COMMUNAL-SCALE WASTEWATER TREATMENT PLANTS WITH DEVELOPMENT OF SUSPENDED SYSTEMS IN BANDUNG CITY

• Main Author: Rafael, Timotius
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/79606
• Institution: Institut Teknologi Bandung

Domestic wastewater in WWTP contains organics, nutrients, and microplastics that are harmful to humans and the environment. This study aims to determine the wastewater characteristics based on PermenLHK No.68/2016 and PP No.22/2021, removal efficiency, and recommendations for improvements to WWTP with suspended system. Research method consists of sampling, laboratory analysis, data processing, and design procedures. There are four research locations that after laboratory analysis have removal efficiency for BOD parameters 77.3% - 88.4%, COD 68.5% - 89.1%, TSS 23.9% - 88.9%, Oil and Grease 24.5% - 84.6%, Ammonia 14.5% - 49, 3%, Total Coliform 61.2% - 99.8%, Total Phosphate 15.5% - 76.3%, Total Nitrogen 33.3% - 96.8%, Nitrite 59.7% - 83.5%, and Nitrate 13.3% - 80.4%, but most parameters in the effluent did not meet the Domestic Wastewater quality standards. The abundance of microplastics founded at the WWTP inlet was 480 - 610 MP/L and at the outlet was 90 - 150 MP/L with a removal range of 75.4% - 81.2%. Microplastics by type with the highest number are shown by the fiber shape at 51.5%, size 11 - 150 ?m 30.4%, and transparent color with a percentage of 34.4%. The results of the study resulted in the need to select alternative designs to improve effluent quality, remove organics, nutrients (N and P), physical, biological and microplastics properties, as well as treatment system recommendations. The results of Simple Additive Weighting (SAW) showed the modification of WWTP with Anoxic/Aerobic system using honeycomb biofilter attached media plus disinfection basin as recommendation system. The selected system configuration can remove parameters up to 80% - 95%. Improvement of the existing WWTP can be done by modifying the system or adding units through expansion of the treatment area.