Organic Removal in Domestic Wastewater Using Anaerobic Treatment System-MBBR With Flow Recirculation Ratio and Intermittent Aeration

Abstract

Aim: The modified Small-scale Domestic Sewage Treatment Plant (SDSTP) reactor with anaerobic fixed bed- aerobic Moving Bed Biofilm Reactor (MBBR) is implemented to find the optimum condition for organic degradation related to recirculation and intermittent aeration practices with the purpose to comply with the governmental regulation standard. Methodology and Results: This research have been done with the artificial wastewater with characteristic similar to the sewage treatment plant (STP) of Telkom company with ratio C:N:P of characterized domestic wastewater is 252.40:85.42:3.01 that consists of glucose, NH4Cl, potassium dihydrogen phosphate, potassium nitrate, and sodium nitrite (NaNO2). Reactor design related with attached biomass in media until 2478.56 mg MLVSS.L-1 with the growth kinetics rate (μ) of 0.4691 day—1. The artificial wastewater is applied the determine the optimum variation of flow recirculation and periodic aeration in specific Hydraulics Retention Time (HRT) and Organic Loading Rate (OLR). In this research, the optimum recirculation ratio for organic degradation is 26.40 L.h-1 and the optimum aeration frequency variation is 12 hours in intermittent frequency with the maximum efficiency of organic degradation of 76.10% with the degradation efficiency real domestic wastewater application from STP Telkom company is 83.09%. Conclusion, significance and impact study: Stover-Kincannon model is the best model with highest accuracy rate to model the degradation performance of organic compounds by the anaerobic fixed bed- aerobic MBBR SDSTP with determination coefficient 0.8623 and also degradation coefficient 38.121 day-1 compared with other models studied in this research.

Adsorption isotherm and kinetic study of Bengkulu Kaolinite in removing ferrous cation by continuous operation

“…Compared to a pseudo-second-order model, it can be shown why this model is inapplicable to the kinetics of ferrous cation adsorption onto kaolinite. Compared to the pseudo-firstorder model, the pseudo-second-order model more closely matches the experimental results [18]. Running kaolin with a reactor height of 20 cm produced the highest correlation coefficient (R 2 ) value of a pseudo-second-order model (R 2 = 0.9313).…”

Organic Removal in the Water Body as the Effect of Mineral Wool Installation

“…The processes that may occur in organic materials removal when passing through the supporting media are filtration, adsorption, and biodegradation. In the filtration process, when water passes through the supporting media -acting as filter media -organic compounds will be retained, causing a decrease in COD concentration (Subroto et al, 2022). In the adsorption process, pollutants will enter the pores of the supporting media.…”

“…Calculation in dry season Graph of COD degradation using MatLab application al., 2014;Zhang et al, 2018). The presence of oxygen causes the aerobic oxidation process to take place, organic materials will be converted into relatively stable final products and the rest will be synthesized into new microbes(Subroto et al, 2022). According toPrayogo et al (2020) andPrayogo et al (2023), biofilms on a supporting media usually take 30-40 days to grow optimally.…”

Effect of Detention Time in Reducing Fe and Mn Concentration of Groundwater: Case Study at the Universitas Negeri Malang

“…Groundwater is recognized as a vital natural resource used by communities to satisfy their daily necessities. Subroto et al, (2022) reported that with the rising demand for clean water, there is an increase in the contamination of clean water due to various pollutants originating from diverse communal activities. Human activities require water, including personal hygiene, plant irrigation, and laundry.…”