Effluent organic matter removal during advanced wastewater treatment process: O3-BAC and AC/O3-BAC

2011 ◽  
Author(s):  
Jin Guo ◽  
Bao Gui Wang ◽  
Feng Sheng ◽  
Fang Fang Yin
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Treatment Process ◽  
Effluent Organic Matter ◽  
Wastewater Treatment Process ◽  
Organic Matter Removal ◽  
Advanced Wastewater Treatment

A study on the effects of ozone dosage on dissolved-ozone flotation (DOF) process performance

2015 ◽  
Vol 71 (9) ◽  
pp. 1423-1428 ◽  
Author(s):  
Xin Jin ◽  
Pengkang Jin ◽  
Xiaochang Wang
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Treatment Process ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Secondary Effluent ◽  
Process Performance ◽  
Wastewater Treatment Process ◽  
Organic Matter Removal

Dissolved-ozone flotation (DOF) is a tertiary wastewater treatment process, which combines ozonation and flotation. In this paper, a pilot-scale DOF system fed by secondary effluent from a wastewater treatment plant (WWTP) in China was used to study the effect of ozone dosage on the DOF process performance. The results show that an ozone dosage could affect the DOF performance to a large extent in terms of color and organic matter removal as well as disinfection performance. The optimal color and organic matter removal was achieved at an ozone dosage of 0.8 mg/l. For disinfection, significant improvement in performance could be achieved only when the organic matter removal was optimal. The optimal ozone dosage of at least 1.6 mg/l was put forward, in this case, in order to achieve the optimal color, turbidity, organic matter and disinfection performance.

scholarly journals Insight into removals of PARAFAC components from dissolved and particulate organic matter in wastewater treatment process by two-dimensional correlation and structure equation modeling

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Benxin Yu ◽  
Dongping Liu ◽  
Jian Wang ◽  
Yingxue Sun
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Particulate Organic Matter ◽  
Structural Equation ◽  
Treatment Process ◽  
Treatment Plant ◽  
Equation Modeling ◽  
Two Dimensional ◽  
Wastewater Treatment Process ◽  
Insight Into

Abstract Background Most particulate organic matter (POM) cannot be directly degraded in the conventional wastewater treatment, which should be transformed into dissolved organic matter (DOM) through a hydrolysis process. However, non-hydrolyzed POM in the biological treatment can limit treated efficiencies for the wastewater treatment plants (WWTPs) facilities. Hence an operational tool is indispensable for insight into removals of DOM and POM factions in the WWTP. In this study, excitation-emission matrix fluorescence spectroscopy (EEM) combined parallel factor analysis (PARAFAC), two-dimensional correlation (2D-COS) and structural equation modeling (SEM) was employed to evaluate removals of DOM and POM in a wastewater treatment plant. Results Four fluorescence components were identified in DOM and POM substances from the WWTP by EEM combined with PARAFAC, i.e., tyrosine-like (TYLF), tryptophan-like (TRLF), microbial byproduct-like (MBLF), and fulvic acid-like (FALF). In A2/O process, the TYLF and TRLF of DOM were removed to a larger extent than those of MBLF and FALF in anaerobic tank, while TYLF and MBLF of POM were removed to a great extent than those of TRLF and FALF in primary sedimentation and aerobic tanks. By the 2D-COS, a decreasing variation order of DOM fractions in the wastewater treatment process was UV-FALF → MBLF2 → Vis-FALF → TRLF → TYLF, while the decreasing order of POM fractions was Vis-FALF → UV-FALF → MBLF2 → TYLF → MBLF1 → TRLF. SEM revealed that TRLF and TYLF of DOM were degraded by anaerobic microorganism, and TRLF could be transformed partially into FALF. However, TRFL and TYLF of POM were discomposed by aerobic microorganism. Conclusions The 2D-COS and SEM can be practicable tools as EEM-PARAFAC for monitoring DOM and POM in the WWTP. The study could present a theoretical support to improving the retrofit of WWTP and formulating emission standards for organic pollutants.

scholarly journals Examining the Effects of the Runoff Originating From Biosolids Amended Soil Plots on the Biogeochemical Nitrogen Cycle and Eutrophication

2021 ◽  
Author(s):  
Denis Matiichine
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Organic Nitrogen ◽  
Treatment Process ◽  
Organic Fertilizer ◽  
Agricultural Runoff ◽  
Water Systems ◽  
Agricultural Fields ◽  
Wastewater Treatment Process ◽  
Significant Difference

One of the disposal methods for biosolids (nutrient rich organic matter that settles out of the wastewater during wastewater treatment process) is through application on agricultural fields as organic fertilizer. In order to determine the effects of runoff originating from biosolids treated fields on the nitrogen biogeochemical cycle and eutrophication of surface water, a lab-scale mesocosm experiment was carried out, simulating agricultural fields and thermally stratified water systems receiving agricultural runoff. A significant difference was found between the effects of the runoff from unfertilized soil plots and plots fertilized with biosolids. The findings indicate that the majority of incoming nitrogen is either denitrifed, lost to the sediment or is accumulated in the water column as nitrate. Further, it is hypothesised that the majority of incoming organic nitrogen was rapidly mineralized to ammonium in the hypolimnion, which has the potential to increase nitrogen bioavailability to primary producers in the epilimnion.

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