Experimental Study on Sewage Treatment by Grid Flocculation Technology

2014 ◽  
Vol 955-959 ◽  
pp. 3306-3309
Author(s):  
Feng Ping Hu ◽  
Chao Gao ◽  
Pei Zhu ◽  
Zhen Gong Tong ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Sewage Treatment ◽  
Effect Of Treatment ◽  
Flocculation Time

Using grid flocculation technology inspected the effect of treatment of sewage by the addition of coagulant PAC. After the device is stable, under the 40 mg/L of dosage and 17.1 min of flocculation time conditions, the removal of turbidity, COD, NH3-N and TP is 72%, 48%, 13.8% and 77%.

Experimental Study on Micro-Polluted Raw Water of Kongmu Lake Treatment by Vortex Clarifier

2013 ◽  
Vol 448-453 ◽  
pp. 1169-1172
Author(s):  
Feng Ping Hu ◽  
Gui Zhou Hu
Keyword(s):  
Experimental Study ◽  
Pilot Scale ◽  
Stable Operation ◽  
Raw Water ◽  
Scale Test ◽  
Effect Of Treatment ◽  
Flocculation Time ◽  
Pilot Scale Test

Through pilot scale test, inspection the effect of treatment of micro-polluted raw water of Kongmu Lake with vortex clarifier accomplished by the addition of coagulant PAC. After the stable operation of the vortex clarifier, in the 30 mg/L of dosage and 6.8 min of flocculation time conditions, the removal of turbidity, NH3-N, TP, UV254 and COD is 94.2%, 22.9%, 84.8%, 45.2% and 78.5%.

Experimental Study on Sewage Treatment by Vortex-Grid Flocculation Technology

2014 ◽  
Vol 989-994 ◽  
pp. 849-852
Author(s):  
Feng Ping Hu ◽  
Huan Huan Li ◽  
Lin Yuan Wang ◽  
Zhen Gong Tong ◽  
Qi Zhang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Sedimentation Tank ◽  
Inclined Tube ◽  
The Stability ◽  
Device Operation ◽  
Flocculation Time

The aim of this test is to study the effect of treating CODCr, NH3-N, TP and turbidity of sewage with addition of coagulant PAC by using technology of combining vortex-grid flocculation tank with inclined tube sedimentation tank. The results show that the removal rate of devices treating CODCr, NH3-N, TP and turbidity are 68.36%, 22.22%, 82.60% and 80.90% respectively after the stability of the device operation on the condition that the dosage is 25 mg/L and the optimum flocculation time is 17 min.

Research on Influencing Factors of Photoreactivation in Urban Sewage Treatment by UV Disinfection

2013 ◽  
Vol 361-363 ◽  
pp. 595-600
Author(s):  
Ji Ku Zhang ◽  
Hui Ye Wang ◽  
Hui Ting Shao ◽  
Zhi Biao Dong
Keyword(s):  
Experimental Study ◽  
Influencing Factors ◽  
Water Samples ◽  
Sewage Treatment ◽  
Uv Disinfection ◽  
Natural Light ◽  
E Coli ◽  
Urban Sewage ◽  
Uv Dose ◽  
Higher Doses

Test using CS-type UV sterilizer to do experimental study on the urban sewage , mainly research the influence of the placement time under natural light and the UV dose on photoreactivation. The results show that when disinfection ultraviolet dose is equal, bacteria photoreactivation phenomenon is more obvious with the increase of the placement time of water samples under natural light . When the placement time reaches at 3h, bacteria photoreactivation phenomenon is the most obvious. Under the same placement time, the ratio of bacteria photoreactivation decreases gradually with the increase of UV dose. When UV dose reaches at 80mJ /cm2 or the higher doses, the bacteria does not basically happen photoreactivation phenomenon. Photoreactivation phenomenon in E. coli is more obvious than that in bacteria under the same conditions.

Pulsed SBR Treatment of Municipal Sewage Denitrification and Experimental Research

2013 ◽  
Vol 779-780 ◽  
pp. 1500-1504
Author(s):  
Fu Jun Liu ◽  
Fan Yang
Keyword(s):  
Experimental Study ◽  
Removal Efficiency ◽  
Experimental Research ◽  
Operation Mode ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Municipal Sewage ◽  
Raw Water ◽  
University Of Technology ◽  
New Type

Pulsed SBR process is a new type of SBR operation mode proposed against the traditional SBR process with poorer denitrification effect. This experiment is carried out at laboratory of sewage treatment, Beijing University of Technology, using real sewage for study, to study denitrification efficiency of pulsed SBR in nitration add raw water - denitrification this repeated and cycled process (with the same amount of water). The experimental results show that the effluent TN is less than 2 mg/L, removal efficiency is more than 96%.Keywords: pulsed SBR; domestic sewage; denitrification; experimental study

Experimental Study on a Combined Process of Anaerobic Filter, Anoxic, Oxic and Constructed Wetland for Rural Domestic Sewage Treatment

2014 ◽  
Vol 1004-1005 ◽  
pp. 1033-1037
Author(s):  
John Leju Celestino Ladu ◽  
Xi Wu Lu
Keyword(s):  
Experimental Study ◽  
Treatment Effect ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Operating Parameters ◽  
Combined Process ◽  
Feasibility Robustness ◽  
The Right

<div> <p>The right combination and sequence of treatment methods is the key to the successful handling of rural domestic sewage. This research aim was to carry out experimental study on the combined process and assess its efficiency, feasibility, robustness and suitability for rural domestic sewage treatment and explore the best treatment effect and operating parameters. The parameter optimized and controlled includes hydraulic retention time (HRT) and temperature during the entire research operations. The average COD, TN, NH4+-N and TP removal efficiency of the combined process was 78.2%, 70%, 76% and 87% respectively. Overall, the combined process proved to be efficient and suitable for rural domestic sewage treatment.</p> </div>

scholarly journals Dissolved air flotation (DAF) for biomass recovery from algal ponds

2017 ◽  
Vol 12 (3) ◽  
pp. 534-540 ◽  
Author(s):  
Dayana Melo Torres ◽  
André Luís Calado Araújo ◽  
Rui de Oliveira ◽  
André Câmara de Brito
Keyword(s):  
Suspended Solids ◽  
Sewage Treatment ◽  
Random Factor ◽  
Dissolved Air Flotation ◽  
Sample Characteristics ◽  
Biomass Recovery ◽  
Air Flotation ◽  
Final Effluent ◽  
Flocculation Time ◽  
Dissolved Air

This work evaluated the performance of a dissolved air flotation (DAF) system for biomass recovery from the effluent of algal ponds used for sewage treatment in Northeast Brazil. Two different coagulants and effluent samples were tested following a random-factor experimental design (34–1–4 factors and 3 levels), in triplicate. Factor analysis showed that coagulant dose was the most important factor, independently of the type of coagulant and sample characteristics. For polyaluminium chloride it is possible to work with the original sample pH at the lower recirculation rate (10%) and flocculation time (10 minutes), being able to recovery an algal masses (dry basis) of around 1,200 kg/day and 550 kg/day from the primary facultative and second maturation pond (final effluent), respectively. DAF was more efficient for ferric chloride, however a pH correction to the value of 5.0 was necessary, leading the process to generate masses of solids (dry basis) of about 1,150 kg/day for the facultative pond and 830 kg/day for the maturation pond. Removals of suspended solids, turbidity, and chlorophyll-a were above 60%, reaching at optimal conditions removals up to 90%.

Experimental Study on Activated Sludge Form Sewage Treatment of Different Oxygen Gradient Reactor

2011 ◽  
Vol 374-377 ◽  
pp. 1054-1058
Author(s):  
Xi Tian ◽  
De Jun Bian ◽  
Qing Kai Ren ◽  
Hong Qu ◽  
Li Guo Wan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Wastewater Treatment ◽  
Activated Sludge ◽  
Oxygen Concentration ◽  
Concentration Gradient ◽  
Sewage Treatment ◽  
High Oxygen ◽  
Low Oxygen ◽  
Floc Size ◽  
Oxygen Gradient

It used dissolved oxygen meter to detect dissolved different oxygen concentration within wastewater treatment reactor and analysed reasons for the formation of oxygen concentration gradient. In order to learn more about activated sludge form of different oxygen gradient in the reactor, biological microscope operated in characteristics of microfauna and activated sludge floc in the reactor has been studied. The results showed that Vorticella and Rotifera could grow normally in the high and low regional areas; there are more abundant micro-fauna species in the area of low oxygen, and the microfauna was more mature than those in the area of high oxygen; activated sludge was brown and floc size was small in the areas of high oxygen, activated sludge was black and floc size was big.

Sign in / Sign up

Export Citation Format

Share Document