Enhanced nitrogen removal in the treatment of rural domestic sewage using vertical-flow multi-soil-layering systems: Experimental and modeling insights

Hong, Yongyuan; Huang, Guohe; An, Chunjiang; Song, Pei; Xin, Xiaying; Chen, Xiujuan; Zhang, Peng; Zhao, Yanyun; Zheng, Rubing

doi:10.1016/j.jenvman.2019.03.097

Cited by 60 publications

(30 citation statements)

References 37 publications

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“…Centralized RDW with black water should be strictly treated before discharge into surface water bodies. The small-scale sewage treatment technology for RDW is relatively mature in China and the most important and difficult process is the related operational management [39]. Considering the significant cost of regular RDW treatment is unacceptable for developing countries, centralized rural communities are highlighted, which offer the possibility of separate collection, treatment, or reuse of black water.…”

Section: Resultsmentioning

confidence: 99%

Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater

Luo

et al. 2019

IJERPH

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Given long-term decentralized and centralized rural domestic wastewater (RDW) discharge, nitrogen is continuously depositing in sediments. RDW discharge is assumed to be an important source of ammonium in surface water; however, the effect of long-term RDW discharge on nitrogen pollution in sediments remains unknown. Batch incubations were conducted to investigate the characteristics of internal ammonium loading from long-term polluted sediments by RDW discharge. Four sediments were demonstrated to be heavily polluted by long-term RDW discharge, with total nitrogen (TN) values of 5350, 8080, 2730, and 2000 mg·kg−1, respectively. The internal ammonium release from sediment was a slow and long process, and the risk of ammonium release from sediment during the dry season was significantly greater than that during the wet season. Though all selected sediments were heavily polluted by long-term RDW discharge, the relative contribution of internal ammonium loading from sediments was generally lower than that of external pollution. Hence, dredging is not suggested for RDW-polluted sediments except in response to an emergency. The excessive ammonium in the selected catchment was mainly from untreated and centralized black water in RDW. Centralized black waters in rural communities are highlighted to be separately treated or reused to maintain ammonium content at a safe level.

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Section: Resultsmentioning

confidence: 99%

Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater

Luo

et al. 2019

IJERPH

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“…The test water in the water storage tank was lifted by the water inlet pump and entered the experimental column from the top. When passing through the mixed soil layer and the permeable layer, the suspended particles in the water were intercepted and contacted with the filler to form a biofilm [17]. The raw water was then discharged from the bottom after digestion and decomposition of the biofilm.…”

Section: Experimental Methodsmentioning

confidence: 99%

Experimental Study on the Treatment of Rural Domestic Wastewater Using the Multi-Soil-Layering System Filled with Sludge-Based Biochar

Wang¹,

Zhang²,

Guo³

et al. 2021

ACSM

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This paper aims to improve the treatment effect of the multi-soil-layering system (MSL) on rural domestic wastewater. For this, sludge-based biochar materials were selected in the experiments to study its impacts on the treatment of rural domestic wastewater using the MSL. The comparative experiments were conducted for the three MSL systems filled with different materials: the sludge-based biochar (a), wood chips (b), and charcoal (c). The results showed that when the sludge-based biochar material was used as a filler, the removal effect of COD, NH4+-N, TN, TP is better than that of wood chips and charcoal, and the removal rates were 80%, 90%, 65% and 92%, respectively, meeting the Grade A standard specified in the Hebei Province Rural Domestic wastewater Discharge Standard (DB13/2171-2015); hydraulic loading rates (HLRs) have a great impact on the removal of pollutants, and the pollutant indicators in the system (a)re affected by the HLRs in different degrees, i.e., NH4+-N>TP>COD>TN from high to low; considering the treatment efficiency and pollutant removal effect, the HLRs should be selected between 800L/(m2·d) and 1200L/(m2·d). It’s concluded finally that the sludge-based biochar material can strengthen the removal effect of the MSL system. This study is of theoretical value for the further research on MSL system and resource utilization of the sludge.

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“…The study utilized the CPLEX 12.7 optimizer and Triangle Splitting Method (TSM) to reveal that the impact of population density and elevation variation favored the use of centralized treatment facilities. Hong et al (2019) developed a decentralized, stepwise-cluster model utilizing low C/N ratio wastewater treatment. The multi-soil-layering (MSL) for simulating the removal of nitrogen in wastewater treatment systems using a single factor.…”

Section: Modelingmentioning

confidence: 99%

“…Hong et al. (2019) developed a decentralized, stepwise‐cluster model utilizing low C/N ratio wastewater treatment. The multi‐soil‐layering (MSL) for simulating the removal of nitrogen in wastewater treatment systems using a single factor.…”

Section: Planning and Treatment Managementmentioning

confidence: 99%

Distributed treatment systems

Sheehan

Martinez

et al. 2020

Water Environment Research

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This section presents a review of the scientific literature published in 2019 on topics relating to distributed treatment systems. This review is divided into the following sections: constituent removal, treatment technologies, planning and treatment management, and other topics. © 2020 Water Environment Federation • Practitioner points • Highlights changes and innovation in removal techniques and technologies in water treatment. • Reviews management systems of distributed treatment systems. • Discusses point-of-use treatment systems.

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Enhanced nitrogen removal in the treatment of rural domestic sewage using vertical-flow multi-soil-layering systems: Experimental and modeling insights

Cited by 60 publications

References 37 publications

Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater

Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater

Experimental Study on the Treatment of Rural Domestic Wastewater Using the Multi-Soil-Layering System Filled with Sludge-Based Biochar

Distributed treatment systems

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