The study on bionic fillers used to treat tail water from urban sewage treatment plants

2015 ◽  
pp. 957-960
Author(s):  
Fuyi Du ◽  
Qingjie Xie ◽  
Hang Su ◽  
Xinhua Ma
Keyword(s):  
Sewage Treatment ◽  
Sewage Treatment Plants ◽  
Urban Sewage ◽  
Tail Water

scholarly journals The structural and technical solution for precipitation moisture reducing

2019 ◽  
Vol 91 ◽  
pp. 04002
Author(s):  
Nazira Dzhumagulova ◽  
Vladimir Smetanin ◽  
Nguyen Dinh Dap
Keyword(s):  
New Technology ◽  
Sewage Treatment ◽  
High Capacity ◽  
Technical Solution ◽  
Solid Domestic Waste ◽  
Major Drawback ◽  
Sewage Treatment Plants ◽  
Urban Sewage ◽  
Treatment Facilities ◽  
The Will

One of the main problems in Russia is an acute shortage of free land for the disposal of solid domestic waste and sewage sludge. The treatment and removal of precipitation is a major problem in wastewater treatment. Urban sewage treatment plants were built on model projects in the 1970s, in which natural dehydration on silt areas was provided. Sludge dehydration on silt areas of sewage treatment plants of medium and high capacity is impossible due to the lack of free land areas. The major drawback of this method is the rejection of significant land areas, contamination of the geo-environment, the release of pollutants into the air, as well as the loss of land resources. In sludge processing and utilization, it is necessary to achieve minimum damage to the environment and to increase the possibility of using it on behalf of the national economy. The adoption of new technology and processing of sediments allowed to reduce the initial amount of precipitation by 4 times and to reduce the humidity from 97% to 83%, the amount of sludge formed at the treatment facilities will decrease by 6 times (from 300 m3/day to 50 m3/day) as a result of dehydration of the filter presses, the will be a reduction in the surface concentrations of pollutants in the atmosphere from 5,4 tons per year to 2,9 tons per year.

Research on Intensive Nutrients Removal of the Low C/N Sewage

2012 ◽  
Vol 550-553 ◽  
pp. 2142-2145 ◽  
Author(s):  
Gao Shun Qiu ◽  
Ling Feng Qiu ◽  
Jian Zhang ◽  
Yi Ming Chen
Keyword(s):  
Sewage Treatment ◽  
Effective Theory ◽  
Utilization Rate ◽  
Nutrients Removal ◽  
Oxidation Ditch ◽  
Nitrogen And Phosphorus ◽  
Sewage Treatment Plants ◽  
Urban Sewage ◽  
Effective Removal ◽  
Carrousel Oxidation Ditch

This paper was based on Carrousel oxidation ditch, which was common in the urban sewage treatment plants. With the effect of SND in the oxidation ditch, it was accomplished the effective removal for nitrogen and phosphorus of urban sewage with low C/N, while adopting point-aeration and brush flow, combining with the operation parameters adjustment. Under the condition of low dissolved oxygen (DO), the phenomenon of simultaneous nitrification and denitrification was obvious in macro and micro environments. And compared with the traditional process, this process increased the proportion of organics up to 51% in the ditch, which raised utilization rate of organics. Based on this to establish the kinetics model of TN removal, it could control the concentration of TN in the effluent effectively by adjusting HRT, MLSS and other parameters in the oxidation ditch, which would provide effective theory basis for optimization and adjustment of the process

The Comparative Analysis on Construction and Operation of Urban and Country Sewage Treatment Plants in Guangxi

2012 ◽  
Vol 610-613 ◽  
pp. 1333-1337
Author(s):  
Zi Han Xu ◽  
Guan Wen Cheng ◽  
Jin Jie Meng ◽  
Ning Shu Liang ◽  
Xu Jiang Qin
Keyword(s):  
Wastewater Treatment Plants ◽  
Operating Cost ◽  
Sewage Treatment ◽  
Water Environment ◽  
Small Scale ◽  
Oxidation Ditch ◽  
Sewage Treatment Plants ◽  
Urban Sewage ◽  
Process Operation ◽  
Urban Wastewater Treatment

The statistics about investment and operation situation of 36 urban sewage treatment plants and 72 country ones show that: ①Urban and country sewage treatment plants are mainly small-scale ones, using oxidation ditch, A2/O, SBR and its variants process. ②Operation loading rates of urban and county sewage treatment plants are generally low, and the better treatment process varies with different scales. ③The unit investment and unit investment of pipe network decreases with the scale increasing. So does the trend of operating cost. Overall, the operating costs of the A2/O and the oxidation ditch are cheaper in urban wastewater treatment plants, while each process are more economical in country ones. Therefore, choosing reasonable process, and coordinating the relationship between centralization and decentralization play an irreplaceable role in the coordinated development of the Guangxi autonomous region in the future, saving money under the premise of ensuring the safety of water environment.

scholarly journals Occurrence and removal of emerging pollutants in urban sewage treatment plants using LC-QToF-MS suspect screening and quantification

2021 ◽  
Vol 774 ◽  
pp. 145779
Author(s):  
Laure Wiest ◽  
Antoine Gosset ◽  
Aurélie Fildier ◽  
Christine Libert ◽  
Matthieu Hervé ◽  
...  
Keyword(s):  
Sewage Treatment ◽  
Emerging Pollutants ◽  
Sewage Treatment Plants ◽  
Suspect Screening ◽  
Urban Sewage

The Depth of Phosphorus Removal by Three Coagulations

2011 ◽  
Vol 356-360 ◽  
pp. 1575-1580
Author(s):  
Kai Li ◽  
He Jie Xu ◽  
Chen Gu
Keyword(s):  
Phosphorus Removal ◽  
Sewage Treatment ◽  
Settling Tank ◽  
Ferric Sulfate ◽  
Sewage Treatment Plants ◽  
Urban Sewage ◽  
Hydraulic Conditions ◽  
Removal Efficiencies ◽  
Secondary Settling ◽  
Polyaluminium Chloride

Using the secondary settling tank effluent, this paper is going to research the potentials of three coagulations (polyaluminium chloride, ferric sulfate, and self-polymeric aluminum ferric) in deep chemical phosphorus removal by the beaker experiment. The experiment focuses on the dosages, the hydraulic conditions of coagulation and effect of pH on the removal. The results show that three coagulants have good efficiencies in phosphorus removal. After coagulant treatments, phosphorus can be decreased below 0.5mg/L and achieve Grade A standards of urban sewage treatment plants (GB18918-2002). The removal efficiencies of polymer silicate are superior to those of poly aluminum chloride and polymeric ferric sulfate.

Feasibility Study on the Concentration of Miscible Liquid in Aeration Tank Used by CAF Process

2012 ◽  
Vol 260-261 ◽  
pp. 754-758
Author(s):  
Xiao Tao Guan ◽  
Feng Ping Hu ◽  
Lin Yuan Wang
Keyword(s):  
Activated Sludge ◽  
Industrial Wastewater ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Aeration Tank ◽  
Low Density ◽  
Sludge Treatment ◽  
Sewage Treatment Plants ◽  
Urban Sewage

The Cavitation Air Flotation (CAF) process has been widely applied to the pretreatment of industrial wastewater and urban sewage. However, it has not been applied in the sludge treatment yet. In this paper, Nanchang Chaoyangzhou Sewage Treatment Plant is taken as the example that the CAF process is introduced to the concentration of miscible liquid in the aeration tank in urban sewage treatment plants. According to the optimization of the sludge conditioning agent and the study on the concentration of the miscible liquid in the aeration tank, it is concluded that CAF can be used to concentrate the leftover activated sludge in urban sewage treatment plant, especially that with low density.

Using ozonation-hydrolysis acidification to the pharmaceutical tail wastewater pretreatment

2015 ◽  
Vol 10 (4) ◽  
pp. 688-694
Author(s):  
Yanjiao Gao ◽  
Runzhu Huang
Keyword(s):  
Removal Rate ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Preliminary Treatment ◽  
Urban Sewage ◽  
Hydrolysis Acidification ◽  
Cod Removal Rate ◽  
High Concentrations ◽  
Tail Water

In order to solve the problems of poor biodegradability and high concentrations of non-biodegradable substances from pharmaceutical wastewater after preliminary treatment, the organic components of the tail water (effluent from the preliminary treatment devises of the pharmaceutical industry wastewater treatment station) were analyzed and the method of ozonation-hydrolysis acidification was used to treat tail water from the pharmaceutical factory. The ozone dosage, the reaction time and the changes of biodegradability were studied. The results measured by GC-MS showed that there were 51 types of organic substances in tail water which reduce the biodegradability. The results of the tests showed that 30 mg/L of ozone and 60-minutes of oxidation time were suitable conditions. In the ozonation–hydrolysis acidification process the COD removal rate ranged from 20% to 50%. The test results showed that the ozonation-hydrolysis acidification method could effectively improve the biodegradability of wastewater and provide the foundation for the follow treatment in urban sewage treatment plant using biological methods.

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