Current operation state of wastewater treatment plants in urban China

Zhang, Jingbing; Shao, Yuting; Wang, Hongchen; Li, Guohua; Qi, Lu; Xu, Xianglong; Liu, Shuai

doi:10.1016/j.envres.2021.110843

Cited by 96 publications

(29 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By the end of 2020, total length of drainage pipelines (sewers) was 803,000 km, with a distribution roughly corresponding to the regional GDP (Wang et al 2021 ). There are still concerns that many of these plants do not clean at a desirable ratio (Zhang et al 2021 ), and the sewer systems leading to these plants are still incomplete (Wang et al 2021 ). Biological treatment of industrial wastewater is advancing (Mao et al 2021 ).…”

Section: Solutions To Clean Water Supplymentioning

confidence: 99%

China’s environmental solutions

Schmid

Xiong

2023

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

China emits unproportionately high concentrations of CO2 and, due to rapid population growth and industrialization, suffers from air, water, and soil pollution. However, many of these challenges for sustainable growth are being vigorously addressed, and China aims at a CO2 emission peak by 2030 and carbon neutrality by 2060 (“dual carbon policy”). In addition, nation-wide programs attempt to achieve reforestation and ecological restoration. By 2025, core elements of a “bioeconomy” and a circular economy are expected to be ready. Many of these programs extend into China’s international “belt-and-road” initiative (BRI). In this article, we briefly describe the present achievements of China’s environmental solutions and the country’s visions for a “digital, eco-friendly civilization.” Key points • China’s steps towards environmental cleaning, eco-protection, and decarbonization. • Steps towards a future bioeconomy.

show abstract

Section: Solutions To Clean Water Supplymentioning

confidence: 99%

China’s environmental solutions

Schmid

Xiong

2023

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…A typical water treatment plant produces about 200 t of sludge per day. 2,3 The sludge usually contains a mixture of microorganisms, organic matter, coagulants, and chemical oxides. The relative amounts of these constituents depend on the level of contamination of the raw water, the type and concentration of chemicals used and the efficiency of the treatment process.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Darkwa

Andrews

Darko

et al. 2023

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

A large quantity of water treatment sludge (WTS) is generated yearly from Ghana's Weija water treatment plant. The sludge contains some heavy metals and other toxic chemicals, which must be managed to minimize environmental impact. In the current work, WTS was mixed with varying quantities of kaolinitic-based clays (kaolin and lithomargic clays) to produce porous mullitebased bricks. The bricks were fired at 1200 • C for 1 h, and their properties were determined. Lithomargic clay-based mixtures had less dimensional variation and were suitable to produce near-net shape bricks compared to WTS-based bricks. The addition of WTS increased the linear firing shrinkage and apparent porosity whilst decreasing bulk density and compressive strength. Porous mullite-based bricks fabricated from lithomargic clay exhibited high compressive strength (6.3 MPa) at 10 wt.% WTS addition. The highest apparent porosity of 27% was attained at 40 wt.% WTS addition with compressive strength of 5.1 MPa and thermal conductivity of .5 W/m K.

show abstract

“…Rapid urbanization, exponential growth of household consumption and stringent discharge standards in developing countries pose a huge challenge for preventing and controlling water pollution [1]. Many municipal wastewater treatment plants (WWTPs) in China suffer from insufficient nitrogen removal performance of the biochemical tank [2,3]. The poor nitrogen removal efficiency of activated sludge (AS) often has an adverse impact on the effluent stability of the WWTPs [4,5].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Nitrogen Removal in a Pilot-Scale Anoxic/Aerobic (A/O) Process Coupling PE Carrier and Nitrifying Bacteria PE Carrier: Performance and Microbial Shift

Liu

Zhuang

et al. 2022

Sustainability

View full text Add to dashboard Cite

Integrated fixed-film activated sludge technology (IFAS) has a great advantage in improving nitrogen removal performance and increasing treatment capacity of municipal wastewater treatment plants with limited land for upgrading and reconstruction. This research aims at investigating the enhancing effects of polyethylene (PE) carrier and nitrifying bacteria PE (NBPE) carrier on nitrogen removal efficiency of an anoxic/aerobic (A/O) system from municipal wastewater and revealing temporal changes in microbial community evolution. A pilot-scale A/O system and a pilot-scale IFAS system were operated for nearly 200 days, respectively. Traditional PE and NBPE carriers were added to the IFAS system at different operating phases. Results showed that the treatment capacity of the IFAS system was enhanced by almost 50% and 100% by coupling the PE carrier and NBPE carrier, respectively. For the PE carrier, nitrifying bacteria abundance was maintained at 7.05%. In contrast, the nitrifying bacteria on the NBPE carrier was enriched from 6.66% to 23.17%, which could improve the nitrogen removal and treating capacity of the IFAS system. Finally, the ammonia efficiency of the IFAS system with NBPE carrier reached 73.0 ± 7.9% under 400% influent shock load and hydraulic retention time of 1.8 h. The study supplies a suitable nitrifying bacteria enrichment method that can be used to help enhance the nitrogen removal performance of municipal wastewater treatment plants. The study’s results advance the understanding of this enrichment method that effectively improves nitrogen removal and anti-resistance shock-load capacity.

show abstract

Current operation state of wastewater treatment plants in urban China

Cited by 96 publications

References 19 publications

China’s environmental solutions

China’s environmental solutions

Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Enhanced Nitrogen Removal in a Pilot-Scale Anoxic/Aerobic (A/O) Process Coupling PE Carrier and Nitrifying Bacteria PE Carrier: Performance and Microbial Shift

Contact Info

Product

Resources

About