Urban Sewage Treatment Process and Selection Principles

2014 ◽  
Vol 641-642 ◽  
pp. 399-402
Author(s):  
Chun Mei Liu ◽  
Zheng Yang Wang
Keyword(s):  
Rapid Development ◽  
Sewage Treatment ◽  
Water Environment ◽  
Modern Society ◽  
Physical And Mental Health ◽  
Treatment Technology ◽  
Urban Sewage ◽  
Selection Principles ◽  
City Water ◽  
The City

With the rapid development of modern society and economy, environmental problems have become increasingly prominent, especially the city water environment worsening, exacerbating the shortage of water resources, affecting people's physical and mental health, which has become the serious restriction factor of sustainable development of the city. This paper mainly discuss from the introduction of city sewage treatment technology and methods.

The Evaluation of the Environmental Effects Made by New Technology: An Empirical Study of Urban Sewage-Treatment Intelligent-Control Technology

2013 ◽  
Vol 781-784 ◽  
pp. 2283-2288
Author(s):  
Yan Lou ◽  
Yang Yang Guo ◽  
Lu Cheng Huang
Keyword(s):  
Intelligent Control ◽  
Environmental Effects ◽  
Energy Savings ◽  
New Technologies ◽  
Rapid Development ◽  
Sewage Treatment ◽  
Water Environment ◽  
Control Technology ◽  
Urban Sewage ◽  
Positive Effects

The rapid development of new technologies has met people's growing material and cultural needs, and exerted a huge influence on environment simultaneously. People are increasingly concerned about which influences the new technologies existing and being developed can exert on environment in the future, as well as how to control these influences. In order to determine new technologies' impact on the environment, the Fuzzy Analytic Decision Making Theory is applied to build the index system about environmental effects of new technologies, and evaluate environmental effects of urban sewage-treatment intelligent-control technology. The study finds that urban sewage-treatment intelligent-control technology exerts positive effects on water environment and energy-savings, particularly on water environment; and for the other two environmental factors: the carbon-emissions and solid-waste, the negative effects are slight.

Characteristics and Hazard of the Wastewater from the City Garbage Transfer Stations

2014 ◽  
Vol 955-959 ◽  
pp. 2919-2925
Author(s):  
Qing Wang ◽  
Wen Yu Zhao ◽  
Bang Ding Ma ◽  
Yu Wu ◽  
Kang Huai Liu
Keyword(s):  
Membrane Separation ◽  
Sewage Treatment ◽  
Toxic Heavy Metals ◽  
High Concentration ◽  
Average Value ◽  
Urban Sewage ◽  
Waste Transfer ◽  
Wastewater Samples ◽  
Transfer Stations ◽  
The City

Nine wastewater samples of waste transfer stations had been gathered and analysis in Guilin city. The results indicate that all sewage belongs to high concentration organic wastewater originating from the waste transfer stations. The average value of wastewater’s COD is 5759mg/L and the maximum value is nearly 28000 mg/L. Its organic pollutants are mainly related to the residues of animals and plants. The content of lead(Pb), Chromium (Cr) and other toxic heavy metals in the wastewater could be 10 times higher than emissions standards, and especially total phosphorus’(TP) content could reach to more than 20 times of discharge standard. In order to protect the environmental quality in the vicinity of them and normally operating of the urban sewage treatment plants, it is necessary that these wastewater should be treated alone. A proposal is that integrated equipment should be made by using some technologies combined biology with membrane separation. Through disperse treatment by the equipment, urban sewage transfer stations could be reused or discharged on standard.

Research on Sewage Treatment Technology of High Salt City in Tangshan Coastal Development Zone

2012 ◽  
Vol 599 ◽  
pp. 543-546
Author(s):  
Yang Yong ◽  
Xiao Liu ◽  
Yao Zong Zhang
Keyword(s):  
Economic Development ◽  
Sewage Treatment ◽  
Coastal Areas ◽  
Coastal Development ◽  
Biochemical Treatment ◽  
Treatment Technology ◽  
Development Zone ◽  
Technical Parameters ◽  
Urban Sewage ◽  
Technical Programs

With the economic development of the coastal development zone, the coastal industrial and economic development is rapid and the other residents' living consumption is lagging behind, resulting in a new coastal development zone COD / BOD low, coupled with the regional characteristics of the coastal areas, making the coastal areas of urban sewagetreatment plant of the difficult problems of biochemical treatment. This study focused on the reasons for the difficulties of urban sewage in coastal areas of biochemical treatment solution to the problem, and provide relevant technical programs and technical parameters for the construction of a new coastal development zone in the city sewage treatment.

scholarly journals Is ceramsite the last straw for sewage sludge disposal: a review of sewage sludge disposal by producing ceramsite in China

2019 ◽  
Vol 80 (1) ◽  
pp. 1-10
Author(s):  
Bifan He ◽  
Guangjin Wang
Keyword(s):  
Sewage Sludge ◽  
Glass Powder ◽  
River Sediment ◽  
Rapid Development ◽  
Sewage Treatment ◽  
Raw Material ◽  
The Sustainable Development ◽  
Urban Sewage ◽  
Advantages And Disadvantages ◽  
Sludge Disposal

Abstract With the rapid development of urbanization, the amount of urban sewage treatment is increasing. Waste activated sludge (WAS) is a by-product of sewage treatment, and its output is increasing year by year. How to properly handle WAS is related to the sustainable development of the sewage treatment industry. The production of ceramsite from WAS is an effective way to realize the utilization of sludge. This paper comprehensively describes the use of WAS as raw material, adding clay, cement, glass powder, shale, coal gangue, river sediment, pulverized fly ash and other auxiliary materials (AM) to produce sintered sewage sludge ceramsite and non-sintered sludge ceramsite. This paper analyzes the advantages and disadvantages of the process of making ceramsite from WAS. The research points out the development prospect of ceramsite from WAS.

Use of agro-food wastewaters for the optimisation of the denitrification process

2007 ◽  
Vol 55 (10) ◽  
pp. 63-70 ◽  
Author(s):  
L. Rodríguez ◽  
J. Villaseñor ◽  
F.J. Fernández
Keyword(s):  
Sewage Treatment ◽  
Biological Nutrient Removal ◽  
Optimum Dose ◽  
Batch Test ◽  
Ciudad Real ◽  
Urban Sewage ◽  
Tomato Processing ◽  
Nutrients Concentration ◽  
The City ◽  
Denitrification Process

The aim of this work was to study the feasibility of the denitrification process enhancement, in the Ciudad Real (Spain) WWTP, by dosing agro-food wastewaters generated nearby the city. The studied agro-food wastewaters were characterised by a high COD and low nutrients concentration. The denitrification rates with these wastewaters were lower than those obtained either with acetate or urban sewage, however the dose of agro-food wastewaters raised significantly the denitrification capacity in the WWTP because of the significant increase of easily biodegradable substrates in the wastewater. From the laboratory NUR batch test it was observed that the best agro-food wastewater to enhance the denitrification process was that coming from tomato processing, which presented an average denitrification rate of 1.9 mg NOX-N/(g VSS·h) and an average denitrification yield of 0.2 mg NOX-N/mg COD. The viability of the use of tomato processing wastewater was checked in a pilot plant optimised for urban sewage treatment with biological nutrient removal. The optimum dose, 5.9 mg COD/mg NOX-N, was applied and 99% of the nitrate was removed from the wastewater without influencing negatively either the COD or P effluent concentrations.

scholarly journals Purification of Urban Sewage River Using a Biological Aerated Filter with Sponge Iron and Ceramsite Mixed Fillers

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yi Wu ◽  
Jun Dai ◽  
Qiong Wan ◽  
Guobin Tian ◽  
Dongyang Wei
Keyword(s):  
Removal Efficiency ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Sponge Iron ◽  
Polluted Water ◽  
Biological Aerated Filter ◽  
Treatment Technology ◽  
Phosphorus Adsorption ◽  
Urban Sewage ◽  
Aerated Filter

Filler plays an important role in biological sewage treatment technology. In the purification of urban sewage river, the single sponge iron filler is easy to harden. The combination of sponge iron and ceramsite can hinder the hardening and improve the removal efficiency. In this paper, scanning electron microscopy (SEM) and X-ray diffraction (XRD) were used to characterize the fillers. The removal efficiency experiments were carried out through the self-designed biological aerated filter (BAF) reactor with sponge iron and ceramsite mixed fillers, and the microorganisms attached to the surface of the biological fillers were qualitatively and quantitatively identified through 16S rDNA. The results indicate that the presence of Fe3O4, Fe2O3, Fe3C, and Fe2CO3 in sponge iron determines that sponge iron has strong reducibility and provides electrons for efficient denitrification. NaAlSi3O8 in ceramsite filler plays a significant role in phosphorus adsorption. In #3, #4, and #5 reactors (the mass ratios of sponge iron and ceramsite were 1 : 1, 3 : 1, and 1 : 3, resp.), the removal efficiencies of mixed fillers are good on chemical oxygen demand (COD), total phosphorus (TP), and nitrogen (N), and the more the ceramsite fillers in the reactors are, the higher the microbial abundance and diversity are. The mixture of sponge iron and ceramsite can be used to purify urban sewage river. A scientific basis to purify the polluted water body of urban rivers in situ is thus provided.

The Construction of Xi'an Overall Water Environment Based on the Eco-Permeable Transformation of City Hardened Surface

2011 ◽  
Vol 374-377 ◽  
pp. 721-727
Author(s):  
Dong Fei Yu ◽  
Qiao Zheng
Keyword(s):  
Water Environment ◽  
Living Environment ◽  
Urban Water ◽  
Starting Point ◽  
Water Blocking ◽  
City Water ◽  
Surrounding Areas ◽  
Context Features ◽  
The City ◽  
Hardened Surface

Modern urban surface is gradually covered by water blocking material in China, it has been increasing the city and its surrounding areas on the ecological significance of the "man-made desert" effect. In this paper, taking Xi'an as an example, the authors discuss the possibility to build a whole city water environment through the transformation of city hardened of surface. Xi'an has obvious characteristics of seasonal rainfall, taking the transforming of city's eco-permeable surface as a starting point, will contribute to the gradual recovery of the city’s function as an ecological nodes and the basic "metabolism"; restoration and reconstruction of urban water environment, improving the living environment, highlighting the "Chang’an eight water" pattern and context features of the city.

Research on the Experimental Device of Combined Two-Phase ABR and SBR

2014 ◽  
Vol 507 ◽  
pp. 677-681
Author(s):  
Ling Jing ◽  
Xin Xia Wang
Keyword(s):  
Mass Transfer ◽  
Wastewater Treatment ◽  
Biological Treatment ◽  
High Efficiency ◽  
Low Cost ◽  
Rapid Development ◽  
Water Environment ◽  
Biofilm Reactor ◽  
Treatment Technology ◽  
Two Phase

With the rapid development of industrial and agricultural production in China, the industrial waste water and city wastewater discharged to water environment are increasing. Anaerobic biological treatment is a low-cost wastewater treatment technology and is also a combined technology of the wastewater treatment and energy recovery, it can be used as a core part of energy production and environmental protection system, its product can be actively used to result economic value. After in-depth and systematically study the mechanism and mass transfer theory of anaerobic biological treatment technology, this paper designs anaerobic reactor of high efficiency in mass transfer, namely the anaerobic baffled - elastic packing biofilm reactor.

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