Effect of suspended solids in secondary wastewater effluent on DOC removal by enhanced coagulation

2011 ◽  
Vol 32 (1-3) ◽  
pp. 27-32 ◽  
Author(s):  
Ashok Aryal ◽  
Arumugam Sathasivan ◽  
Weixi Zhan
Keyword(s):  
Suspended Solids ◽  
Wastewater Effluent ◽  
Enhanced Coagulation

scholarly journals Application of PAFC/CPAM for the removal of ZnO nanoparticles by enhanced coagulation

2021 ◽  
Author(s):  
Zhaoyang You ◽  
Changrong Zhao ◽  
Yongjun Sun ◽  
Chang Zhuang
Keyword(s):  
Suspended Solids ◽  
Removal Rate ◽  
Pure Water ◽  
Water Environment ◽  
Response Surface Model ◽  
Surface Model ◽  
Zno Nps ◽  
Hydraulic Power ◽  
Enhanced Coagulation ◽  
Floc Size

Abstract To cope with the increasingly severe challenges of zinc oxide nanoparticles (ZnO-NPs) in the field of the aquatic environment, this paper uses poly-aluminum ferric chloride (PAFC) and cationic polyacrylamide (CPAM) as coagulants to enhance the removal of ZnO-NPs from water. In two environments (pure-water environment and kaolin environment) that simulate suspended solids, we studied the dosage, pH, precipitation time, and hydraulic power of ZnO-NPs at three different initial concentrations (1, 2, and 30 mg/L). The effects of various conditions on the performance of PAFC, CPAM, and PAFC/CPAM to remove ZnO-NPs were examined. Results showed that the overall removal rate of ZnO-NPs in the kaolin environment was slightly higher than that in the pure-water environment. In contrast the removal rate of ZnO-NPs in the PAFC/CPAM was significantly higher than that of PAFC or CPAM alone. The coagulation removal conditions of ZnO-NPs were optimized using a response-surface model. Under the best conditions, the removal rate of ZnO-NPs with an initial mass concentration of 30 mg/L in the PAFC/CPAM combination in pure-water and kaolin environments was 98.54% and 99.17%, respectively. Finally, by studying the changes in floc size during coagulation, enhanced coagulation was an efficient method of removing ZnO-NPs from water.

Performance of a Multipurpose Filter for Simultaneous Removal of Ammonium and Suspended Solids as a Polishing Stage for a Domestic Wastewater Plant Effluent

2010 ◽  
Vol 5 (1) ◽  
Author(s):  
Deniz Alkas ◽  
Bilsen Beler Baykal ◽  
Cumali Kinaci
Keyword(s):  
Natural Zeolite ◽  
Suspended Solids ◽  
Size Range ◽  
Domestic Wastewater ◽  
Filter Material ◽  
Wastewater Effluent ◽  
Ammonium Concentration ◽  
Simultaneous Removal ◽  
Filter Unit ◽  
Solids Removal

A multipurpose filter column was studied as a polishing stage for the simultaneous removal of ammonium and suspended solids from a secondary domestic wastewater effluent. The multipurpose filter consisted of sand as the regular filter material, primarily for the purpose of suspended solids removal, and an ammonium selective natural zeolite, clinoptilolite, for the removal of ammonium. A Turkish clinoptilolite from the Bigadic region was used in the experiments. The capacity of the clinoptilolite was determined by isotherm analysis to be 10.4 mg/g for 20 mg/lt initial wastewater ammonium concentration at pH 7.3 with 0.5-1 mm diameter. In the continuous runs, the multipurpose filter unit was operated down flow with 50% of the unit consisting of clinoptilolite in the upper layer, and 50% sand in the lower both with a grain size range of 0.5-1 mm. The results have revealed that simultaneous removal of 100% of the ammonium and 75% of the suspended solids removal be achieved in the multipurpose filter unit for a working period of 38 hours. The success of this proposal could lend an alternative both for the upgrading of existing treatment plants and for polishing for ammonium and suspended solids rate by using one compact unit.

Removal of microbes from municipal wastewater effluent by rapid sand filtration and subsequent UV irradiation

2003 ◽  
Vol 47 (3) ◽  
pp. 157-162 ◽  
Author(s):  
R.L. Rajala ◽  
M. Pulkkanen ◽  
M. Pessi ◽  
H. Heinonen-Tanski
Keyword(s):  
Uv Irradiation ◽  
Suspended Solids ◽  
Municipal Wastewater ◽  
Water Source ◽  
Pilot Scale ◽  
Wastewater Effluent ◽  
Sand Filtration ◽  
Pre Treatment ◽  
Uv Transmittance ◽  
Rapid Sand Filtration

The elimination of wastewater microbes is often necessary when effluent receiving waters are reused for different purposes e.g. for irrigation or as a raw water source of drinking water. In the present study, rapid sand filtration (SF) combined with the use of polyaluminium chloride coagulation was used as a pre-treatment to improve the quality of wastewater effluent before further treatment with UV irradiation. Pilot-scale experiments were run in four treatment plants in Finland. Treatment performance was followed by measuring physical and microbial parameters. Rapid sand filtration reduced suspended solids, turbidity and colour of effluents by about 90%, 70-80% and 20-50% respectively. It also improved the UV transmittance of water by up to 20%. Microbes and phosphorus were reduced by 90-99% and to 0.05 mg/L respectively. UV irradiation further reduced the number of microbes up to 99.9%. The efficiency of UV doses in pilot UV reactors was confirmed with collimated-beam device determinations and with added FRNA phages. More than 99.9% reduction of MS2 was achieved with the dose of 140mWs/cm2 in pilot UV reactors. Rapid sand filtration and the subsequent UV irradiation reduced the number of all the tested microbes to a low level, often below the detection limit. Suspended solids and the water turbidity were reduced to 1-2 mg/L and ~1 NTU respectively.

Synergistic effect of biological activated carbon and enhanced coagulation in secondary wastewater effluent treatment

2012 ◽  
Vol 65 (2) ◽  
pp. 332-339 ◽  
Author(s):  
A. Aryal ◽  
A. Sathasivan ◽  
S. Vigneswaran
Keyword(s):  
Activated Carbon ◽  
Organic Carbon ◽  
Synergistic Effect ◽  
Wastewater Effluent ◽  
Effluent Treatment ◽  
Distinct Advantage ◽  
Biological Activated Carbon ◽  
Enhanced Coagulation ◽  
Treatment Processes ◽  
Wide Range

The use of secondary wastewater effluent (SWWE) is an essential strategy for making better use of limited water resources. However, a wide range of organic compounds eventually renders them unsuitable for recycling. In water treatment processes, biologically activated carbon (BAC) is adopted after physicochemical treatment. However, the effectiveness of such combination for SWWE remains poorly understood. This study investigates the effectiveness of various combinations: BAC/enhanced coagulation (EC) or EC/BAC, especially in terms of dissolved organic carbon (DOC) removal. The results showed that distinct advantage could be obtained by adopting BAC/EC combination rather than EC/BAC, as microbes in BAC not only remove non-coagulable compounds but also synergize the removal efficiency by releasing some coagulable humic substances.

PHYSICO-CHEMICAL ASPECTS OF YAMUNA RIVER AT GOKUL BARRAGE, MATHURA (UP) INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
AJAY KUMAR RAJAWAT ◽  
PRAVEEN KUMAR
Keyword(s):  
Water Samples ◽  
Suspended Solids ◽  
Total Dissolved Solids ◽  
Tolerance Limit ◽  
Chemical Condition ◽  
Yamuna River ◽  
Dissolved Solids ◽  
Time Period ◽  
Physico Chemical ◽  
Almost All

An attempt has been made to study the Physico-chemical condition of water of Yamuna River at Gokul Barrage, Mathura, (UP). The time period of study was July 2015 to June 2016. Three water samples were selected from different sites in each month for study. The parameters studied were Temperature, Turbidity, pH, DO, BOD, COD, Total Dissolved Solids and Suspended Solids. Almost all the parameters were found above the tolerance limit.

Establishing an empirical equation for the relationship between total suspended solids and total phosphorus concentrations in the downstream Red river water

2020 ◽  
Vol 20 (3) ◽  
pp. 325-332
Author(s):  
Le Nhu Da ◽  
Le Thi Phuong Quynh ◽  
Phung Thi Xuan Binh ◽  
Duong Thi Thuy ◽  
Trinh Hoai Thu ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Suspended Solids ◽  
Empirical Relationship ◽  
Water Environment ◽  
Total Suspended Solids ◽  
River System ◽  
Red River ◽  
Reservoir Impoundment ◽  
Downstream Section ◽  
Reasonable Prediction

Recently, the Asian rivers have faced the strong reduction of riverine total suspended solids (TSS) flux due to numerous dam/reservoir impoundment. The Red river system is a typical example of the Southeast Asian rivers that has been strongly impacted by reservoir impoundment in both China and Vietnam, especially in the recent period. It is known that the reduction in total suspended solids may lead to the decrease of some associated elements, including nutrients (N, P, Si) which may affect coastal ecosystems. In this paper, we establish the empirical relationship between total suspended solids and total phosphorus concentrations in water environment of the Red river in its downstream section from Hanoi city to the Ba Lat estuary based on the sampling campaigns conducted in the dry and wet seasons in 2017, 2018 and 2019. The results show a clear relationship with significant coefficient between total suspended solids and total phosphorus in the downstream Red river. It is expressed by a simple equation y = 0.0226x0.3867 where x and y stand for total suspended solids and total phosphorus concentrations (mg/l) respectively with the r2 value of 0.757. This equation enables a reasonable prediction of total phosphorus concentrations of the downstream Red river when the observed data of total suspended solids concentrations are available. Thus, this work opens up the way for further studies on the calculation of the total phosphorus over longer timescales using daily available total suspended solids values.

ANALYSIS OF ACCUMULATION AND DISTRIBUTION OF LEAD IN THE SYSTEM WATER-BOTTOM SEDIMENTS IN THE BACH DANG ESTUARY (VIETNAM)

2017 ◽  
pp. 62-66
Author(s):  
Truong Van Tuan ◽  
Irina Vladimirovna Volkova
Keyword(s):  
Bottom Sediment ◽  
Bottom Sediments ◽  
Water Samples ◽  
Suspended Solids ◽  
Natural Habitat ◽  
Bottom Layer ◽  
Sediment Samples ◽  
Natural Breeding ◽  
System Water ◽  
Water Bottom

Research was held in the estuary of the river Bach Dang (Dongbay community, Rakhtay district, Hai Phong, Vietnam) in June, 2012 - May, 2013. Concentration of lead was studied in water, suspended solids and bottom sediment. Clam beach (natural breeding environment of Meretrix lyrata ) was inspected regularly, every month. Water samples were taken 6 times from the bottom layer 10 cm down the bottom, once per 3 hours in each of 12 investigated zones. Bottom sediment samples were taken at the depth 2 cm. The findings show that lead accumulates mainly in suspended solids (23.3 mg/kg) and in bottom sediment (14.31 mg/kg), in water it is in small quantities (0.003 mg/kg). Analysis of bottom sediment samples taken in different places showed that they have even leadcontent, lead is distributed uniformly, localization of contaminations is not found. The results obtained can be assumed as the basis for investigating lead accumulation and its excretion by clam Meretrix lyrata organisms in the natural habitat.

ENHANCED COAGULATION FOR ALGAE REMOVAL IN A TYPICAL ALGERIA WATER TREATMENT PLANT

2017 ◽  
Vol 16 (10) ◽  
pp. 2303-2315 ◽  
Author(s):  
Djamel Ghernaout ◽  
Abdelmalek Badis ◽  
Ghania Braikia ◽  
Nadjet Mataam ◽  
Moussa Fekhar ◽  
...  
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Enhanced Coagulation ◽  
Algae Removal
Sign in / Sign up

Export Citation Format

Share Document