Oxidation Ditch Reactor to Remove Ammonia and Phosphate in Tofu Wastewater and Skin Tanning Wastewater

Ni Made Maya Febriana Ramadhany (Department of Enviromental Science, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indo-nesia)
Savira Safrialia (Department of Enviromental Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Lolita Kurniasari (Department of Enviromental Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Iqbal Ramadhan (Department of Enviromental Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Euis Nurul Hidayah (Department of Enviromental Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)
Aulia Ulfa Farahdiba (Department of Enviromental Engineering, Universitas Pembangunan Nasional “Veteran” Surabaya, East Java, Indonesia)

Nusantara Science and Technology Proceedings
1st International Conference Eco-Innovation in Science, Engineering, and Technology

Wastewater containing various types of environmental pollutants, for example, Ammonia and phosphate. Wastewater disposal without proper handling will have an impact on environmental quality degradation, so it is necessary to wastewater treatment using an oxidation ditch reactor with a capacity of 500 liters with an operational volume of 250 liters. The variation treatment in this study was by using tofu wastewater (T) and skin tanning wastewater (PK) with direct sunlight and aeration process with 60 rpm rotation speed for 24 hours x 7 days. The results showed (T) was able to reduce the ammonia concentration by 94.1% from a value of 0.18 mg/L to 0.07 mg/L and a phosphate concentration of 75.3% from a value of 16.05 mg/L to 3.96 mg/L. Whereas the (PK) able to reduce the ammonia concentration by 94.1% from a value of 0.18 mg/L to 0.07 mg/L and a phosphate concentration of 41.4% from a value of 10.2 mg/L to 5.9 mg/L.