Non-submerged attached growth process for domestic wastewater treatment: Influence of media types and internal recirculation ratios

Dang, Bao‐Trong; Nguyen, Thanh-Tin; Bui, Xuan‐Thanh; Ngo, Huu Hao; Lin, Kun‐Yi Andrew; Itayama, Tomoaki; Saunders, Todd; Huynh, Tan-Nhut; Cao, Thanh Ngoc-Dan; Visvanathan, Chettiyappan; Varjani, Sunita; Rene, Eldon R.

doi:10.1016/j.biortech.2021.126125

Cited by 8 publications

(1 citation statement)

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“…However, the present conventional treatment systems will not be able to meet the limits as conventional treatment systems were not designed to meet the ammonia and nitrate limits. It is proposed that a submerged attached growth system is to be introduced into the conventional treatment system to help the system to meet these limits [25,26]. Palm (POC) is a waste material that comes from the steam boiler of the palm oil industry.…”

Section: Introductionmentioning

confidence: 99%

Kinetics study of nutrients removal from synthetic wastewater using media as submerged in continuous activated sludge system

2023

Sustainable Processes and Clean Energy Transition

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Abstract. Domestic wastewater effluents are one of the main sources of environmental contaminants such as nutrients. Wastewater has been treated with biological processes for over a century to remove contaminants. Conventional wastewater treatment plants continue to struggle to meet Malaysian discharge limits. Stringent regulation enforced by governing authorities makes it obligatory to comply with discharge guidelines to fulfill ammonia and nitrate levels. To assist the system in meeting these limits, it is recommended that a submerged attached growth Palm Oil Clinker (POC) can be incorporated into the conventional treatment system. The study was conducted in a continuous submerged attach growth conventional activated sludge which was evaluated for the treatment of wastewater (CSAR). A basket was installed in the aeration tank of the reactor to submerge (POC). Two identical reactors were operated for each reactor of study which (A) was referred to as submerged media reactor while (B) was referred to as control. The studies were carried out at various influent flow rates between 5 and 30 L/d, and constant organic load rate OLR. Parameters such as NH4-N, and NO3-N, were monitored. Generally, Ammonia and Nitrate were highly removed. At all conditions of flow rate (5-30 L/d), the maximum and minimum NH4-N removal is 92% and 85%. The experimental data were validated through well-established mathematical bio-kinetic models such as the First order model, and Monod models. The kinetic coefficients R2 of the first-order model of the substrate removal rate were 0.97 for Ammonia. The steady-state data was fitted to both models obtained at various flowrate. Monod's kinetic model was appropriate for describing experimental results in terms of microbial growth parameters. The kinetic coefficients R2 (0.984) and Ks 303 for the removal of Ammonia, respectively. While µmax 10 g/L.d for Ammonia removal respectively.

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Section: Introductionmentioning

confidence: 99%