High Rate BAF with Filter Media of Large-Size Lightweight Ceramisite for Micro-Polluted Raw Water Pretreatment

2012 ◽  
Vol 170-173 ◽  
pp. 2367-2372 ◽  
Author(s):  
Shao Ming Lu ◽  
Li Yang ◽  
Shao Wen Li ◽  
Jian Yong Guo
Keyword(s):  
Removal Rate ◽  
Ammonia Nitrogen ◽  
High Rate ◽  
Raw Water ◽  
Turbidity Removal ◽  
Large Size ◽  
Water Pretreatment ◽  
Aeration System ◽  
Aerated Filter ◽  
The Individual

On account of micro-polluted raw water, high rate up-flow biological aerated filter (HUBAF) is used to remove the ammonia nitrogen and micro organic pollutants in raw water. Using ceramisite as filtration media, at a diameter of 6mm to 10 mm, a surface density of above 1g/cm3 and a filtration rate of 16 m/h to 20 m/h, ceramisite layer is in a state of micro expansion, which is beneficial to keep a high nitrification efficiency. On account of raw water where NH3-N is below 4mg/L, NH3-N concentration t can be stabilized at less than 0.5 mg/L in HUBAF effluent. Since lack time of biochemical action, the CODMn removal rate by HUBAF is low. As the effluent of BAF carried abundant amounts of microbes and dissolved oxygen, it increased the CODMn removal rate by 11% in final effluent compared to the individual conventional process of “flocculation-sedimentation-filtration-disinfection”. The turbidity removal efficiency is only the 1/3 of ordinary BAF, which reduces the head loss and energy consumption, and multiple filters to share a centralized aeration system is possible. In addition, HUBAF system is aerated by the single-pore aeration filter heads under the filtration board, equipped with both up-flow and down-flow backwash systems and no need for extra grit chamber, HUBAF is convenient for maintaining and administration.

Effect on Bed Material Heights to the Performance of ZCBAF in the Treatment of Micro-Polluted Raw Water

2012 ◽  
Vol 209-211 ◽  
pp. 2053-2057
Author(s):  
Jin Xiang Liu ◽  
Shui Bo Xie ◽  
Chun Ning Cheng ◽  
Jin Sheng Lou ◽  
Shi You Li
Keyword(s):  
Removal Efficiency ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Test Results ◽  
Raw Water ◽  
Hydraulic Loading ◽  
N Removal ◽  
The Media ◽  
Aerated Filter ◽  
Bed Material

The effect of bed material heights on treatment performance of pollutants from micro-polluted raw Water was studied in zeolite - Ceramics biological aerated filter(ZCBAF) technology. The test results showed the removal rate of CODMn, NH4+-N and UV254 will improve with the increase of media height, most of CODMn and UV254 were removed within the first 440mm , when the media height over 440mm, the effect of increase height is inconspicuous removal, and ammonia-nitrogen removal has evident improvement during 220-440mm. At the media height of 20mm, 40mm and 60mm in ZCBAF respectively, the removal efficiency of CODMn is 18.05%，31.6% and 38.62% respectively, NH4+-N removal efficiency is 29.78%,81.28% and 93.02% respectively , and UV254 removal efficiency is 7.81%，10.11% and 11.26% respectively under the air/water ratio of 1:1 and the hydraulic loading of 1.2m3/(m2.h). Removal rate of CODMn was decreased with the increase of hydraulic loading, and removal effect of NH4+-N and UV254 had not big influence.

Performance of Polluted Source Water Treatment by Biological Aerated Filter (BAF) with Zeolite, Activated Carbon and Anthracite Media

2013 ◽  
Vol 777 ◽  
pp. 117-121
Author(s):  
Dong Wang ◽  
Li Ping Qiu ◽  
Chun Hui Guo ◽  
Qiang Liu
Keyword(s):  
Activated Carbon ◽  
Water Treatment ◽  
Removal Efficiency ◽  
Ammonia Nitrogen ◽  
Source Water ◽  
Raw Water ◽  
Biological Aerated Filter ◽  
Turbidity Removal ◽  
N Removal ◽  
Aerated Filter

The performance of three BAFs with zeolite, activated carbon and anthracite media for the treatment of polluted Huaihe raw water were investigated. All three BAFs performed promising permanganate index (CODMn) and ammonia nitrogen (NH4+-N) removal efficiency as well as the turbidity removal was over 60%. Moreover, the CODMn and NH4+-N removal in the three BAFs were affacted by the characteristics of filter media. Activated carbon and anthracite had better CODMn removal than zeolite. Zeolite had the best NH4+-N removal, followed by activated carbon, anthracite was the worst.

Experimental Studies on Enhanced Coagulation of Tail Water

2013 ◽  
Vol 295-298 ◽  
pp. 1478-1481
Author(s):  
Feng Xun Tan ◽  
Jiu Mei Wang ◽  
Dao Ji Wu
Keyword(s):  
Ferric Chloride ◽  
Removal Rate ◽  
Reclaimed Water ◽  
Experimental Studies ◽  
Ammonia Nitrogen ◽  
Raw Water ◽  
Nitrogen And Phosphorus ◽  
Enhanced Coagulation ◽  
Tail Water ◽  
Water Eutrophication

Traditional wastewater treatment methods can no longer remove effectively nitrogen and phosphorus that are the direct murderers of water eutrophication hazard. Enhanced coagulation method was adopted to improve the treatment effect by dosing suitable coagulants and coagulant aids. The raw water was from the reclaimed water in a University. TP and ammonia nitrogen removal of the water had been researched through an enhanced coagulation process with dosing ferric chloride, aluminum sulfate, polymeric ferric chloride, and poly-aluminum chloride (PAC) in this study. The coagulants effects were estimated by determining the removal rate of ammonia nitrogen, TP, COD and turbidity. When dosing the raw water with 80 mg/L PAC, the removal rates of ammonia nitrogen, TP, COD and turbidity are respectively 6.12%, 67.79%, 26.21%, 85.41%. The experimental results can be used as a reference of water treatment in the reclaimed water station.

Research on the Implementation and Analysis of High-Turbidity Raw Water Pre-Treatment with a Barrier Board

2012 ◽  
Vol 610-613 ◽  
pp. 1402-1408
Author(s):  
Jian Liang Chen ◽  
Yi Kuo Chang ◽  
Yun Hwei Shen ◽  
Kun Liao Chen
Keyword(s):  
Removal Rate ◽  
Experimental Result ◽  
Raw Water ◽  
Turbidity Removal ◽  
Gravity Settling ◽  
Bottom Mud ◽  
High Turbidity ◽  
Different Depths ◽  
Pre Treatment

The purpose of this Research is to simulate the water quality of varied High-turbidity Raw Water at different depths under the water’s surface. During the experiment, a Barrier Board was used to extend the flowing route and to change the overflow level for carrying out the pre-treatment of High-turbidity Raw Water through the changes of varied flow rates in order to study the changes and the removal rate of the turbidity for the influent and effluent; with the settled bottom mud surveyed, the operating requirements of the Surface Overflow Rate (SOR). The experimental result indicated that the turbidity of High-turbidity Water can be reduced by means of an inertia restrained flow, extending the flowing route and heightening the overflow level. The results indicated that the turbidity of the effluent was mostly between 380-1,000 NTU in presenting an over 50% removal rate and even up to 93%. When the SOR of the Sedimentation Basin is set at 19.l m/d, a 54-86% turbidity removal rate can be achieved; whereas, a 50-72% removal rate can be achieved when set at 38.3 m/ d. It has indicated that a significant effect could be achieved for turbidity treatment by employing the properties of high-turbidity substances and the convenient physical theory of gravity settling. As such, a visible removal effect could be achieved to exhibit the effect of pre-treatment.

Performance of Micro-Polluted Source Water Treatment by Biological Aerated Filter with Lava Media

2014 ◽  
Vol 675-677 ◽  
pp. 968-971
Author(s):  
Bin Wang ◽  
Li Ping Qiu ◽  
Li Xin Zhang ◽  
Kang Xie
Keyword(s):  
Ph Value ◽  
Removal Rate ◽  
Surface Characteristics ◽  
Ammonia Nitrogen ◽  
Source Water ◽  
Biological Aerated Filter ◽  
Start Up ◽  
Operational Temperature ◽  
Promising Treatment ◽  
Aerated Filter

The performance of biological aerated filter (BAF) with lava media for the treatment of micro-polluted source water was investigated with the operational temperature 18°C, the PH value 6.29-8.35, hydraulic retention time (HRT) 30 min as well as dissolved oxygen (DO) 2-3mg/L. The results show that the lava media is a pretty carrier that has promising surface characteristics for microorganism growth and biofilm formation. The biofilter could be operated successfully in 18d, that was shorter than the ceramic and zeolite media filter in the same start-up condition. During the steady operation period, the lava media BAF performed a promising treatment performance of permanganate index, ammonia nitrogen, and turbidity removal, where as the removal rate were 46%, 97% and 62%, respectively. Moreover, the index of UV254, which partly indicates the concentration of hardly degradable substance in the micro-polluted source water, could be removed 23% in the novel media filter.

Biochemical Characteristics of UBAF in Different Influent NH4+-N Concentration under Yellow River Condition

2011 ◽  
Vol 374-377 ◽  
pp. 991-994
Author(s):  
Jian Guang Liu ◽  
Kai Li ◽  
Hui Liu ◽  
Meng Meng Feng
Keyword(s):  
Yellow River ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Layer Depth ◽  
P Concentration ◽  
N Concentration ◽  
Aerated Filter ◽  
Volumetric Loading ◽  
Filter Layer ◽  
Media Layer

The upflow biological aerated filter(UBAF) filled with grain slag was applied in Yellow River treatment. The aim is to study the reactor’s ability withstanding ammonia nitrogen volumetric loading in Yellow River water treatment. As influent NH4+-N concentration increases from 0.2mg/L to 3.0mg/L, the average removal rate of turbidity, CODMn and NH4+-N were 82%, 27% and 97% respectively, and removal of NH4+-N occurs mainly in the filter layer depth changing from 150cm to 210cm. The nitrification performance improves when PO43- -P concentration in water reach 60μg/L, and the removal of NH4+-N occurs mainly in the filter media layer depth shortened from 210cm to 90cm.

Impact of Partial Backwashing to Ammonia Nitrogen Removal in Biological Aerated Filter

2011 ◽  
Vol 183-185 ◽  
pp. 720-724 ◽  
Author(s):  
Ping Li ◽  
Li Long Yan ◽  
Fang Ma
Keyword(s):  
Low Temperature ◽  
Protective Effect ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Nitrifying Bacteria ◽  
Biological Aerated Filter ◽  
Previous Level ◽  
Aerated Filter

Biological Aerated Filter has the drawback of severe plug under low temperature, and frequent back-washing would cause the bad performance of ammonia removal. To solve these shortcomings, partial backwashing experiment was carried out to test its amelioration effect on Biological Aerated Filter. The result showed that performing backwashing at the 40 cm of filter had strong protective effect on nitrifying bacteria, the ammonia removal could be improved gradually with the highest removal rate of 71.71%. Partial backwashing affected less on ammonia removal and the removal efficiency could be restored to the previous level after the backwashing completed for 2.5 h.

Study on the Advanced Treatment and Reuse of Dyeing Wastewater Using Polyamide Nanofiltration Membrane

2011 ◽  
Vol 356-360 ◽  
pp. 1843-1846
Author(s):  
Jiang Quan Ma ◽  
Qi Zhang ◽  
Qing Ling Lu ◽  
Xiao Bing Gan ◽  
Jun Hao Xia ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
Quality Standard ◽  
Ammonia Nitrogen ◽  
Advanced Treatment ◽  
Nanofiltration Membrane ◽  
Raw Water ◽  
Permeate Flux ◽  
Dyeing Wastewater ◽  
Turbidity Removal ◽  
Colloidal Species

The microfiltration (MF) and nanofiltration (NF) integrated membrane technologies were used in the advanced treatment of dyeing wastewater. The ZrO2 MF membrane was used to remove colloidal species from the wastewater before NF. The effects of permeate flux, CODCr rejection, the removal effects of ammonia nitrogen and total phosphorus by polyamide NF membrane were investigated. The results indicated that the turbidity removal efficiency was 76.7%~95.0%. CODCr rejection was range from 33.3% to 54.9% by MF. After the process of NF, CODCr rejection was between 66.65% and 91.18%. The removal effects of both color and turbidity were 100%. The value of pH was 6~7. The CODCr was smaller than 60mg•L-1. The value of ammonia nitrogen was smaller than 7mg•L-1. The value of total phosphorus was smaller than 0.5mg•L-1. It came up to the quality standard of recycling raw water for industrial uses. It can be used as the water for industrial.

Research on the Implementation and Analysis of High-Turbidity Raw Water for Particle Pre-Treatment with a Barrier Board

2012 ◽  
Vol 610-613 ◽  
pp. 1432-1438
Author(s):  
Jian Liang Chen ◽  
Yi Kuo Chang ◽  
Yun Hwei Shen ◽  
Kun Liao Chen
Keyword(s):  
Water Quality ◽  
Removal Rate ◽  
Operating Time ◽  
Raw Water ◽  
Detention Time ◽  
Sedimentation Basin ◽  
Large Size ◽  
Treatment Experiment ◽  
High Turbidity ◽  
Pre Treatment

In this research, the raw water presenting turbidity was sampled to simulate the change of the water quality. A barrier board was used to extend the flowing route and the level change of the overflow; carry out the pre-treatment of high-turbidity raw water. Particle detention time and the average flowing speed analyzed as well for comparing the removal effect with that in the physical field. The particle detention time is as follows: At 4-141 min, the operating time can be shortened; when this is less than 90 min, the effluent still can maintain a 50-88% turbidity removal rate and the water quality of the effluent can even drop to 530 NTU. During the test, most of the average flowing speed was within the operating scope of the rectangular Sedimentation Basin for which the removal rate was 61%-93% and the effluent turbidity was below 1,000 NTU and even up to the optimal 380 NTU. A total of 3 items meet the operating requirements of the Inclinometer Sedimentation Basin, presenting a 54%-72% removal rate and 1,000-1,650 NTU of effluent turbidity; and one item exceeds the operating requirements of the Inclinometer Sedimentation Basin, presenting a lowered 1,900 NTU of effluent turbidity from 3,800 NTU and a 50% removal rate. Large-size particles exist in the high-turbidity raw water, which tends to settle under the gravity effect during after a long-route flowing journey. For example, the turbidity of the influent is 4,300-5,300 NTU which was reduced to 920-750 NTU after the pre-treatment experiment presenting a 79-86% or higher removal rate.

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