Identifying key parameters in a novel multistep bio-ecological wastewater treatment process for rural areas

Wu, Yongbo; Zhu, Wenbo; Lü, Xiwu

doi:10.1016/j.ecoleng.2013.09.049

Cited by 32 publications

(19 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to these high-rate anaerobic reactors, the anaerobic filters (AFs) have drawn attention because of the following advantages [13][14][15]: (1) simple design configuration with low capital and operating costs, (2) excellent capability of high biomass retention with carriers, (3) stable operation, (4) greater tolerance to hydraulic loading rate and organic loading rate, and (5) low footprint. The potential of using AFs for treating wastewater have been well developed not only for industrial wastewater, but also for domestic wastewater [5,[16][17][18]. However, most of these studies focused on the effects of carriers, hydraulic retention time (HRT), and organic loading rate on the performance of AFs, and there were a few studies that focused on the effects of seasonal temperature [5,18].…”

Section: Introductionmentioning

confidence: 99%

Effect of Seasonal Temperature on the Performance and on the Microbial Community of a Novel AWFR for Decentralized Domestic Wastewater Pretreatment

Lü

2017

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Due to environmental burden and human health risks in developing countries, the treatment of decentralized domestic wastewater has been a matter of great concern in recent years. A novel pilot-scale three-stage anaerobic wool-felt filter reactor (AWFR) was designed to treat real decentralized domestic wastewater at seasonal temperature variations of 8 to 35 • C for 364 days. The results showed that the average chemical oxygen demand (COD) removal efficiencies of AWFR in summer and winter were 76 ± 7.2% and 52 ± 5.9% at one day and three days Hydraulic Retention Time (HRT), respectively. COD mass balance analysis demonstrated that even though COD removal was lower in winter, approximately 43.5% of influent COD was still converted to methane. High-throughput MiSeq sequencing analyses indicated that Methanosaeta, Methanobacterium, and Methanolinea were the predominant methanogens, whereas the genus Bacillus probably played important roles in fermentation processes throughout the whole operation period. The performance and microbial community composition study suggested the application potential of the AWFR system for the pretreatment of decentralized domestic wastewater.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Seasonal Temperature on the Performance and on the Microbial Community of a Novel AWFR for Decentralized Domestic Wastewater Pretreatment

Lü

2017

Applied Sciences

Self Cite

View full text Add to dashboard Cite

show abstract

“…Centralized wastewater treatment plants used for municipal wastewater treatment are usually not suitable for rural wastewater treatment due to the dispersed rural population and construction costs of sewage collectors (Wang et al 2011a;Ye and Li 2009). By contrast, decentralized systems are preferable for the treatment of widely distributed rural domestic wastewaters with advantages such as high removal efficiency of pollutants, low costs, and easy maintenance (Wu et al 2013b). Some on-site independent processes for decentralized sewage treatment, such as absorbent biofilter (Kwun et al 2000), constructed wetlands (Wu et al 2002;Yu et al 2012), high-rate algal ponds (Evans et al 2005), and septic tanks (Liang et al 2009), have been developed and applied in rural areas.…”

Section: Introductionmentioning

confidence: 99%

Effects of flow speed and circulation interval on water quality and zooplankton in a pond–ditch circulation system

Jian

et al. 2015

Environ Sci Pollut Res

View full text Add to dashboard Cite

A pond-ditch circulation system (PDCS) shows great promises for ecological restoration of rural contaminated water in southern China. In this study, the optimal flow speed, circulation interval, and their combination for the system were investigated for higher pollutant removal efficiency and lower costs in three separate experiments: I, II, and III, respectively. In each experiment, there are three PDCSs (S1, S2, and S3) with different water circulation speeds or circulation intervals, respectively. The results demonstrated that in experiment I, total nitrogen (TN) removal rates, species numbers, and diversity indexes of zooplankton in S1 with a flow speed of 3.6 L/h were significantly higher than those in S2 (7.2 L/h) and S3 (10.2 L/h), respectively. Similarly, in experiment II, S3 circulating every other 4 h had significantly higher TN reduction rates, species numbers, and diversity indexes than S1 and S2 circulating every other 1 and 2 h, respectively. In experiment III, water qualities in S1 (circulation of 3.6 L/h+interval of 4 h) were better than those in S2 (7.2 L/h+4 h) and S3 (10.2 L/ h+6 h), respectively. Together, circulation at every other 4 h (3.6 L/h) is probably the optimal operating condition for the PDCS in remediating rural contaminated water.

show abstract

“…That may be attributed to the energy recovery and low sludge production in anaerobic bioreactors [1][2][3]. Despite of these advantages, anaerobic techniques are not widely adopted due to the lack of nitrogen removal capability [4][5][6][7]. Even though nitrogen is one of the important nutrients for agriculture and landscaping irrigation reuse [8], nitrogen also plays a major role in oxygen depletion and eutrophication in the receiving water bodies [9].…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, more and more attention has been focused on the treatment of decentralized domestic wastewater by anaerobic techniques in developing countries, particularly in the rural areas of China [1][2][3][4]. That may be attributed to the energy recovery and low sludge production in anaerobic bioreactors [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Li¹,

Lü²

2017

Water

Self Cite

View full text Add to dashboard Cite

Abstract:Recently, more decentralized wastewater treatments are of great interest for rural regions. In this work, a novel ANF-WDSRBC system combined with an anoxic filter (ANF) and a four-stage water-dropping-self-rotating biological contactor (WDSRBC) was designed as a post-treatment option. With a total hydraulic retention time (HRT) of 8.8 h and reflux ratio of 1:1, the ANF-WDSRBC system was operated 160 days. The results showed the ANF-WDSRBC system had better performance without mechanical aeration devices, the removal efficiencies of chemical oxygen demand (COD), ammonia (NH 4 + -N) and total nitrogen (TN) were 61.4% ± 4.3%, 86.1% ± 3.7%, and 54.5% ± 3.9%, respectively. By means of high-throughput MiSeq sequencing, the results suggested that Proteobacteria, Bacteroidetes, Firmicutes, and Chloroflexi were the predominant phyla in the system. In the WDSRBC units, Nitrosomonas, Nitrosospira, Bacillus, and Nitrospira were the main genera to take part in nitrification. Longilinea, Bellilinea, Thiobacillus, and Thauera in the ANF unit were the main genera to participate in denitrification and organic matters degradation. The novel ANF-WDSRBC system had great potential in the post-treatment of decentralized domestic wastewater.

show abstract

Identifying key parameters in a novel multistep bio-ecological wastewater treatment process for rural areas

Cited by 32 publications

References 25 publications

Effect of Seasonal Temperature on the Performance and on the Microbial Community of a Novel AWFR for Decentralized Domestic Wastewater Pretreatment

Effect of Seasonal Temperature on the Performance and on the Microbial Community of a Novel AWFR for Decentralized Domestic Wastewater Pretreatment

Effects of flow speed and circulation interval on water quality and zooplankton in a pond–ditch circulation system

Performance and Microbial Diversity in a Low-Energy ANF-WDSRBC System for the Post-Treatment of Decentralized Domestic Wastewater

Contact Info

Product

Resources

About