The Present Situation and Future Trend of the Applications of TiO2 in the Wastewater Treatment

2014 ◽  
Vol 884-885 ◽  
pp. 178-181
Author(s):  
Bing Wang ◽  
Shou Hui Tong ◽  
Song Han ◽  
Yi Xiao ◽  
Xing Wei ◽  
...  
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Environment ◽  
Present Situation ◽  
Future Trend ◽  
Ecological Environment ◽  
Technology Research ◽  
Industrial Cities ◽  
Oxidation Technology ◽  
Technology Level

With the improvement of industrial technology level there are more and more special water quality in the waste water, this bring great difficulties to the water treatment, and the water environment has been an unprecedented severe challenges , especially in some industrial cities. This not only endanger the safety of nearby residents drinking water, even threatening the whole ecological environment. There are some people proposed TiO2 photocatalysis oxidation technology in wastewater treatment may play an important role, so it has been a hot issue in the field of science and technology research.

DESIGN PLANNING WASTEWATER TREATMENT PLANT OF NATA DE COCO INDUSTRY WITH THE ACTIVATED SLUDGE PROCESS

2016 ◽  
Vol 9 (2) ◽  
Author(s):  
Dinda Rita K. Hartaja ◽  
Imam Setiadi
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Appropriate Technology ◽  
Waste Water Treatment Plant ◽  
Activated Sludge Process ◽  
High Level

Generally, wastewater of nata de coco industry contains suspended solids and COD were high, ranging from 90,000 mg / l. The high level of of the wastewater pollutants, resulting in nata de coco industry can not be directly disposed of its wastewater into the environment agency. Appropriate technology required in order to process the waste water so that the treated water can meet the environmental quality standards that are allowed. Designing the waste water treatment plant that is suitable and efficient for treating industrial wastewater nata de coco is the activated sludge process. Wastewater treatment using activated sludge process of conventional (standard) generally consists of initial sedimentation, aeration and final sedimentation.Keywords : Activated Sludge, Design, IPAL

Study on Water Quality Improvement of Streams in Baoan District, Shenzhen City, China

2011 ◽  
Vol 347-353 ◽  
pp. 1902-1905
Author(s):  
Hua Li You
Keyword(s):  
Waste Water ◽  
Mathematical Model ◽  
Water Quality ◽  
Fresh Water ◽  
Water Discharge ◽  
Water Environment ◽  
Oxygen Demand ◽  
Polluted Water ◽  
Integrated Analysis ◽  
Shenzhen City

Water is the basis of natural resources and strategic economic resources.Deteriorated water environment of streams in Shenzhen city could have a great impact on ecological safety, people's health,and economic development.Based on the data of field observation and Remote sensing (RS) image,integrated analysis of the water degradation causes,and the changes of biochemical oxygen demand in five days(BOD5）concentration by mathematical model were carried out,which is on basis of percentage of waste water disposal,fresh water transformation,and harbor excavation, respectively.The results show that degradation causes of water quality were resulted from waste water discharge, harbor construction,and ecological environment damage, which could lead to slowly water exchange. Accordingly,the pollution can be easily to store in the bay,which result in water quality changes.The most important improved countermeasure is the control of waste water, which could be had a great effectiveness to decrease pollution.In addition, fresh water must be supplied after polluted water was cut off,which can be better improvement for water quality.This would be extreme improvement for hydrological dynamics due to 15m harbor excavation,which can significantly reduce BOD5 concentration.The innovation points of this paper is to mathematical model,which is based on the basis of qualitative analysis.

scholarly journals Recent Advances of Photocatalytic Application in Water Treatment: A Review

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1804
Author(s):  
Guangmin Ren ◽  
Hongtao Han ◽  
Yixuan Wang ◽  
Sitong Liu ◽  
Jianyong Zhao ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
High Efficiency ◽  
Low Cost ◽  
Great Promise ◽  
Rapid Progress ◽  
Recent Advances ◽  
Photocatalytic Application ◽  
Oxidation Technology ◽  
Performance Challenges

Photocatalysis holds great promise as an efficient and sustainable oxidation technology for application in wastewater treatment. Rapid progress developing novel materials has propelled photocatalysis to the forefront of sustainable wastewater treatments. This review presents the latest progress on applications of photocatalytic wastewater treatment. Our focus is on strategies for improving performance. Challenges and outlooks in this promising field are also discussed. We hope this review will help researchers design low-cost and high-efficiency photocatalysts for water treatment.

Development of the Acidic Mining Wastewater Treatment Technology

2013 ◽  
Vol 295-298 ◽  
pp. 1372-1375 ◽  
Author(s):  
Guang Wei Liu ◽  
Run Cai Bai
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Acid Mine Drainage ◽  
Mine Drainage ◽  
Mining Waste ◽  
Formation Condition ◽  
Research Development ◽  
Treatment Technology ◽  
Acid Mine ◽  
Mining Wastewater

The main formation condition and harmfulness of the acidic mining waste water's were analyzed in this paper. The treatment technology of the acid mine drainage's was briefly introduced. The research development of acid mine drainage was summarized in recent years. It was the fact that developing the efficient, cheap, safe and easy treatment technology of acid mine should be necessary and inevitably and some success management experiences of acidic waste water were applied in acidic mining wastewater.

The Research on the Current Situation and Advances of Petrochemical Wastewater Treatment

2012 ◽  
Vol 550-553 ◽  
pp. 2416-2419 ◽  
Author(s):  
Wen Jun Xiang
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Petrochemical Industry ◽  
Present Situation ◽  
Current Situation ◽  
High Salt ◽  
Petrochemical Wastewater ◽  
Existing Problems ◽  
The Future ◽  
At Home

At present, it is so prominent in the development of the petrochemical industry in China，and it is accompanied by petrochemical wastewater, which has become a big problem need to solve urgently.Because petrochemical wastewater mainly contains benzene-compound, organic matter, high salt wastewater and oil sewage, etc. They are very damaging and highly contaminated. The composition and properties of the petrochemical wastewater were introduced firstly, the current situation of petrochemical wastewater treatment at home and abroad were reviewed in the study. Especially the development of petrochemical industry in sichuan was introduced. Based on the present situation and the existing problems, put forward some countermeasures and expect technique develop direction in the future.

scholarly journals Nitrogen and Phosphorous Removal in Municipal Wastewater Treatment Plants in China: A Review

2010 ◽  
Vol 2010 ◽  
pp. 1-10 ◽  
Author(s):  
Yong Qiu ◽  
Han-chang Shi ◽  
Miao He
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Batch Reactor ◽  
Water Environment ◽  
Optimization Techniques ◽  
Municipal Wastewater Treatment ◽  
Real Time Control ◽  
Operational Optimization ◽  
Municipal Wastewater Treatment Plants

Surface water environment in China was degraded rapidly in the last two decades, resulting in increasingly tighten criteria issued for municipal wastewater treatment plants (WWTPs). This paper reviewed the recent advances of process design and operational optimization for nutrients removal. Three major processes, as anaerobic-anoxic-oxic (AAO) process, oxidation ditch (OD), and sequencing batch reactor (SBR) occupied 65% of WWTPs amounts and 54% of treatment volumes of China in 2006. However conservative process designs and operational faults often impaired the process performances and energy efficiency. Therefore, typical processes were modified, combined, and innovated to meet the requirements of the diverse influent characteristics and lower energy consumptions. Furthermore, operational optimization techniques by modeling, simulation, and real-time control were also developed and applied in China to improve the process operation. Although great efforts had been contributed to improve the WWTPs performances in China, attentions should be continuously paid to the introduction, instruction, and implementation of advanced techniques. At last, the technical demands and appropriated techniques of WWTPs in China were briefly discussed.

Water reuse for irrigation from waste water treatment plants with seasonal varied operation modes

2004 ◽  
Vol 50 (2) ◽  
pp. 47-53 ◽  
Author(s):  
P. Cornel ◽  
B. Weber
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Treated Wastewater ◽  
Nitrifying Bacteria ◽  
Water Treatment Plants ◽  
Operation Modes ◽  
Waste Water Treatment Plants

Irrigation periods are usually limited to vegetation periods. The quality requirements for treated wastewater for disposal and for reuse are different. The reuse of water for irrigation allows partly the reuse of the wastewater's nutrients (N and P). Outside the irrigation period the water must be treated for disposal, thus nutrient removal is often required in order to avoid detrimental effects on the receiving surface water body. Only wastewater treatment plants with different operation modes for different seasons can realise these requirements. The nitrification is the most sensitive biological process in the aerobic wastewater treatment process. At low water temperatures the nitrifying bacteria need several weeks to re-start full nitrification after periods without NH4-removal. Therefore it is necessary to develop options for waste water treatment plants which allow a fast re-start of the nitrification process. Based on theoretical considerations and computer simulations of the activated sludge treatment process, one possibility for implementing a wastewater treatment plant with different seasonal operation modes is evaluated.

A proposed sustainable BNR plant with the emphasis on recovery of COD and phosphate

2003 ◽  
Vol 48 (1) ◽  
pp. 77-85 ◽  
Author(s):  
X.-D. Hao ◽  
M.C.M. van Loosdrecht
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Water Environment ◽  
Pilot Scale ◽  
Ammonium Oxidation ◽  
Municipal Wastewater Treatment ◽  
Nitrogen And Phosphorus ◽  
Water Problems ◽  
Sustainable Wastewater Treatment ◽  
The Impact

Water problems have to be solved in an integrated way, and sustainability has become a major issue. For this reason, developing more sustainable wastewater treatment processes is needed. New discoveries and good understanding on microbial conversions of nitrogen and phosphorus make more sustainable processes possible. New options for decentralized sustainable sanitation are generally compared to conventional sewage systems, we think that for a proper comparison also innovative centralized treatment schemes should be evaluated. In this article, a more sustainable WWTP is proposed for municipal wastewater treatment, mainly based on the principles of denitrifying dephosphatation and anaerobic ammonium oxidation (ANAMMOX). The proposed system consists of a first stage of the A/B process in which maximal sludge production is achieved. In this way, COD is regained as sludge for methanation. The following BCFS® and CANON processes can remove N and P with minimal or no COD need. As a potential fertiliser, struvite can easily be removed from the sludge water by adding magnesium compounds. A case study is done on the basis of the mass balance over the proposed plant. The effluent from the system has a good quality to be recycled. This could also make a contribution to meeting the world's water needs and lessening the impact on the world's water environment. Since all the separate units are already applied or tested on pilot-scale, no problems for technical implementation are foreseen.

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