An innovative integrated system utilizing solar energy as power for the treatment of decentralized wastewater

Han, Changfu; Liu, Junxin; Liang, Hanwen; Guo, Xuesong; Li, Lin

doi:10.1016/s1001-0742(12)60034-5

Cited by 35 publications

(18 citation statements)

References 9 publications

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“…Regarding solar energy utilization, few papers discussed [28], nor adequately investigated its application, mentioning that Han, et al has studied the solar energy utilization for a small scale plant and found that the dispersion of the plant component makes it feasible to utilize solar energy [28].…”

Section: Energy Requirements For Operating Wastewater Treatment Plantsmentioning

confidence: 99%

Potential application of renewable energy sources at urban wastewater treatment facilities in Palestine – three case studies

Taha¹,

Al-Sa’ed²

2017

Desalination and Water Treatment

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a b s t r a c tThis paper aimed to assess the energy consumption and the removal efficiency of three wastewater treatment plants (WWTPs) in Palestine and explores the potential application of renewable energy with associated impacts on unit operations. National rules and regional guidelines for treated water are regulatory instruments for the construction approval of WWTPs in Palestine. Three urban WWTPs of various technologies were selected as case studies for the assessment. The technologies applied were conventional activated sludge with anaerobic sludge digestion, extended aeration and membrane bioreactor (MBR) serving Nablus, Al-Bireh and Altira cities, respectively. Analysis of collected data on the BOD 5 removal were 96%, 98% and 99%. The removal efficiency of nitrogen reached 85% and 95% for Al-Bireh and Altira and not accounted for in Nablus WWTP. The energy required for both liquid and sludge lines was calculated based on the available data and correlated with the treatment efficacy. Results analysis revealed wide variations in the energy consumption among the three WWTPs. Altira MBR showed normal trends compared to published literature with 2.88 kWh/ m 3 , of which 40% was consumed by the biological treatment stage. Al-Bireh WWTP consumed 1.86 kWh/m 3 with 35% of the electrical consumption for biological stage, and 24% for the sludge line. Nablus-WWTP consumed 2.25 kWh/m 3 with 62% of the energy consumed by the biological stage and 34% for sludge line. Under load operation below the design capacities, the specific energy consumption for Al-Bireh and Nablus WWTPs are contradicting common published data for activated sludge treatment systems. Use of renewable energy could assist in the reduction of the annual energy operational costs. Assessment of solar photovoltaic (PV) application could yield electricity sufficient for Altira and Al-Bireh pump station facilities covering 9%, 15%, and 1% of their energy demand. PV installation at Nablus WWTP showed marginal impacts if connected off-grid or if combined heat and power are not operational until 2020, payback periods were estimated at 7.5 and 18.7 years, respectively.

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Section: Energy Requirements For Operating Wastewater Treatment Plantsmentioning

confidence: 99%

Potential application of renewable energy sources at urban wastewater treatment facilities in Palestine – three case studies

Taha¹,

Al-Sa’ed²

2017

Desalination and Water Treatment

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“…Solar power applied to treat wastewaters has been demonstrated in several studies and projects [18]. As the discharge of rural sewage, solar energy density also has the analogous feature of changing periodically, which differs significantly between daytime and night.…”

Section: Introductionmentioning

confidence: 99%

Influence of intermittent aeration and organic loading rate on lab-scale constructed wetland systems treating synthetic wastewater

Shi²,

Ma³

2016

Desalination and Water Treatment

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A B S T R A C TBy coupling the intermittent characteristics of rural sewage discharge and solar energy density, the performance responses of lab-scale tidal flow constructed wetland (TF) and conventional vertical flow constructed wetland (VF) to different organic loading rates (OLRs) (166.3, 300.9, 451.2, 602.4, and 751.2 g/m 2 d) in synthetic domestic sewage treatment were investigated to study its feasibility to replace conventional aeration and reduce the dependence of wastewater treatment plants on the grid in this study. Artificial aeration was conducted based on simulating photovoltaic aeration. The increase in OLR promoted the removal performances for the chemical oxygen demand (COD) and ammonia-nitrogen (NH þ 4 -N) in TF, which could be up to 95.7 and 97.2%, respectively, under OLR of 751.2 g/m 2 d. Excess organic carbons inhibited NH þ 4 -N removal through competition for oxygen available in VF, where the COD removal efficiency could be 89.6% while low NH þ 4 -N removal (40%) was obtained under OLR 751.2 g/m 2 d. With the increase in OLR, the removal of total nitrogen (TN) was enhanced. A higher OLR can not only provide enough electron donors but also produce more anoxic regions for denitrification. The best TN removal was 77.5% in TF and 49.8% in VF, which occurred at OLR of 751.2 and 602.4 g/m 2 d, respectively. A drop of TN removal in VF was attributed to the lack of nitrate-nitrogen (NO À 3 -N) when reaching OLR of 751.2 g/m 2 d. The removal efficiency for total phosphorus was increased gradually with the increase in OLR. This paper suggests that appropriate control of OLR can achieve the optimal effect of pollutants removal, especially the elimination of TN.

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“…Biological wastewater treatment technologies have been successfully used for rural sewage treatment, and are able to remove COD, nitrogen and phosphorus effectively. However the high energy consumption of these technologies is often cited as the main barrier to their wide application in rural areas [6] . In order to overcome this limitation, some researchers proposed to use the hybrid energy system combining conventional and the renewable energy resources to meet the energy requirement of the rural sector wastewater treatment plants [7] , and others attempted to solely use the novel photovoltaic technology without batteries for rural sewage treatment, further reducing the dependence of sewage treatment facilities on grid system and the construction costs.…”

Section: Introductionmentioning

confidence: 99%

“…Han et al [6] reported an innovative integrated system utilizing solar energy as power for decentralized wastewater treatment in Beijing, China. Additionally, our previous study using a pilot-scale photovoltaic intermittent aeration A/O reactor for rural domestic wastewater treatment in Dali, Yunnan province, China.…”

Section: Introductionmentioning

confidence: 99%

Performance and Real-time Control of a Novel SBR Based on Simulating Photovoltaic Aeration for Organics Removal

Ma¹,

Zhou²

2016

Proceedings of the 2016 International Conference on Mechatronics, Control and Automation Engineering

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A novel SBR based on simulating photovoltaic aeration for organics removal was established for rural sewage treatment. Short-term effects of aeration rate and temperature on soluble chemical oxygen demand (SCOD), ammonium (NH4 + -N) and dissolved total phosphorous (DTP) removal processes were investigated, and suitable real-time control parameters for organics removal process were selected. The results showed that organic removal process can be divided into the rapid degradation stage and the recalcitrant degradation stage. In the organic matter rapid degradation stage, when temperature was constant (25°C), the increase in aeration rate resulted in a positive impact upon the SCOD decrease rate and the amount of NH4 + -N assimilated by heterotrophic bacteria. The slope changes in DO profiles (dDO/dt) were found to better represent the organic degradation process, which could be used for real-time control of the organics removal process after smoothing.

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An innovative integrated system utilizing solar energy as power for the treatment of decentralized wastewater

Cited by 35 publications

References 9 publications

Potential application of renewable energy sources at urban wastewater treatment facilities in Palestine – three case studies

Potential application of renewable energy sources at urban wastewater treatment facilities in Palestine – three case studies

Influence of intermittent aeration and organic loading rate on lab-scale constructed wetland systems treating synthetic wastewater

Performance and Real-time Control of a Novel SBR Based on Simulating Photovoltaic Aeration for Organics Removal

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