Improving Performance of Water Treatment on Oxidation Ditch Using Modification of Reactor Hydrodynamic

Abstract

Urban wastewater treatment in Indonesia is limited, due to its high investment cost. To date, there are only 11 big cities that have centralized domestic wastewater treatment plant, such as in Jakarta, Tangerang, Bandung, Medan, Yogyakarta and Surakarta. There is also city sludge faecal treatment plant, like in Surabaya, Jakarta, Yogyakarta and Semarang. All the treatment process in these treatment plants is based on biological process, which are oxidation ditch (Tangerang and Surabaya), stabilization pond (Bandung) and extended aeration (Jakarta and Yogyakarta). Mostly, the biological treatment on the plants are malfunctioning, some of them because of operational capacity which cannot fulfill the design capacity. Yet, the effort of optimization only focuses on biological process aspect, while the hydraulic and physical aspects have a great influence to treatment performance. Research on modification of hydraulic aspect, both experimentally and by using computer simulation to improve treatment performance is needed.

Key performance indicators (KPIs) comparison of food chain reactor and conventional oxidation ditch technology in industrial waste treatment

“…A mathematical model and pilot testing to performing carbon oxidation-nitrification, denitrification and settling was revealed that operational cycles which conducted in the range (120 -400 min), only one (220 min-nitrification: 120 min/ denitrification : 100 min), met fully the nitrogen's effluent criteria and minimum energy consumption [18]. From research that conduct model of Computational Fluid Dynamic (CFD) simulation showed that The oxidation ditch treatment performance is influenced by the hydraulic and physical aspects [5]. The summary of Key Performance Indicators references of activate sludge system in aeration tank and oxidation from references can be seen in Table 1.…”

“…According to types of media for growing aerobic microorganisms, an aerobic biological treatment processing can be classified as suspended growth process and attached growth process [3]. Mostly urban water treatment in Indonesia is a biological process basis, it may be caused by cost consideration [5], for example rectangular aeration systems in the EJIP (East Jakarta Industrial Estate park), Sequence Batch Reactor (SBR) systems in industrial areas Bukit Indah, and the oxidation ditch system at Jababeka Industrial Estate.…”

A coupled hydrodynamic‐biokinetic simulation of three‐phase flow in an oxidation ditch using CFD

“…Despite the limited use of CFD modelling in ODs, [17,[28][29][30] the hydrodynamic-biokinetic approach has been reflected in their investigations. [31,32] Many of the simulations, however, assumed a two-phase condition either solid-liquid or gas-liquid, [33] which makes simulation results less accurate.…”

Performance of Spirulina Platensis in Oxidation Ditch Reactor for treating To-fu Wastewater

“…The oxidation ditch is a modification of the activated sludge process which has been known for many years to remove nitrogen content (Hadisoebroto et al, 2014). This building is usually made of concrete or soil that is excavated to a certain depth.…”