Microwave-enhanced iron-carbon-activated hydrogen peroxide process for the advanced treatment of semi-aerobic aged refuse biofilter effluent

2021 ◽  
Author(s):  
Ke Feng ◽  
Shiqi Mu ◽  
Jie Bai ◽  
Qibin Li
Keyword(s):  
Hydrogen Peroxide ◽  
Advanced Treatment ◽  
Treated Effluent ◽  
Aged Refuse

In this study a microwave-enhanced and iron-carbon (Fe-C)-activated H2O2 process (MW/Fe-C/H2O2) was applied to the advanced treatment of biologically treated effluent from a semi-aerobic aged refuse biofilter (SAARB). The enhancement...

Advanced Treatment of Coking Wastewater by Oxidation Process Using Pyrite and Hydrogen Peroxide

2013 ◽  
Vol 726-731 ◽  
pp. 2521-2525
Author(s):  
Zhi Yong Zhang ◽  
De Li Wu
Keyword(s):  
Hydrogen Peroxide ◽  
Oxidation Process ◽  
Low Cost ◽  
Oxygen Demand ◽  
Utilization Efficiency ◽  
Advanced Treatment ◽  
Coking Wastewater ◽  
Second Stage ◽  
Potential Alternative ◽  
High Utilization

Coking wastewater is a kind of recalcitrant wastewater including complicate compositions. Advanced treatment of coking wastewater by Fenton-Like reaction using pyrite as catalyst was investigated in this paper. The results show that the chemical oxygen demand (COD) of coking wastewater decreased significantly by method of coagulation combined with two-stage oxidation reaction. COD of wastewater can decrease from 250mg/l to 45mg/l after treatment, when 2g/L pyrite was used in each stage oxidation and the dosage of hydrogen peroxide (H2O2) is 0.2ml/l for first stage treatment, 0.1ml/l for second stage treatment respectively. The pyrite is effective to promote Fenton-Like reaction with low cost due to high utilization efficiency of H2O2, moreover, catalyst could be easily recovered and reused. The Fenton-Like reaction might be used as a potential alternative to advanced treatment of recalcitrant wastewater.

scholarly journals Membrane integrated process for advanced treatment of high strength Opium Alkaloid wastewaters

2018 ◽  
Vol 77 (7) ◽  
pp. 1899-1908 ◽  
Author(s):  
Güçlü Insel ◽  
Ahmet Karagunduz ◽  
Murat Aksel ◽  
Emine Cokgor ◽  
Gokce Kor-Bicakci ◽  
...  
Keyword(s):  
Inorganic Nitrogen ◽  
Oxygen Demand ◽  
High Strength ◽  
Complete Removal ◽  
Advanced Treatment ◽  
Treated Effluent ◽  
Aeration System ◽  
Total Inorganic Nitrogen ◽  
Conductivity Parameter ◽  
Activated Sludge Systems

Abstract In this study, an integrated aerobic membrane bioreactor (MBR)-nanofiltration (NF) system has been applied for advanced treatment of Opium processing wastewaters to comply with strict discharge limits. Aerobic MBR treatment was successfully applied to high strength industrial wastewater. In aerobic MBR treatment, a non-fouling unique slot aeration system was designed using computational fluid dynamics techniques. The MBR was used to separate treated effluent from dispersed and non-settleable biomass. Respirometric modeling using MBR sludge indicated that the biomass exhibited similar kinetic parameters to that of municipal activated sludge systems. Aerobic MBR/NF treatment reduced chemical oxygen demand (COD) from 32,000 down to 2,500 and 130 mg/L, respectively. The MBR system provided complete removal of total inorganic nitrogen; however, nearly 50 mgN/L organic nitrogen remained in the permeate. Post NF treatment after MBR permeate reduced nitrogen below 20 mgN/L, providing nearly total color removal. In addition, a 90% removal in the conductivity parameter was reached with an integrated MBR/NF system. Finally, post NF application to MBR permeate was found not to be practical at higher pH due to low flux (3–4 L/m2/hour) with low recovery rates (30–40%). As the permeate pH lowered to 5.5, 75% of NF recovery was achieved at a flux of 15 L/m2/hour.

Anaerobic Treatment of Bleached TMP and CTMP Effluent in the Biopaq UASB System

1991 ◽  
Vol 24 (3-4) ◽  
pp. 331-345 ◽  
Author(s):  
L. H. A. Habets ◽  
A. L. de Vegt
Keyword(s):  
Hydrogen Peroxide ◽  
Anaerobic Treatment ◽  
Full Scale ◽  
Resin Acids ◽  
Raw Material ◽  
Complexing Agent ◽  
Methanogenic Activity ◽  
Treated Effluent ◽  
Pilot Work ◽  
Cost Efficient

The effluents from CTMP mills are on the one hand too dilute for evaporation and recovery, and on the other hand too highly polluted for conventional aerobic secondary treatment. In summer 1986 we therefore started an extensive research program in cooperation with the Ahlström Engineering division in Savonlinna, Finland, and Paques-Lavalin in Toronto, Canada, in order to investigate the anaerobic treatability of CTMP effluent, using UASB technology. This research included fundamental work in the lab, as well as on-site pilot work in Finland and in Canada. As a result, two full-scale plants are in operation. The first plant was started up in October 1988 at Quesnel River Pulp in B.C., Canada, and is treating up to 140 tons of COD per day in two reactors of 3500 m3 each. The second plant was ready for start-up in January 1990 at the Enso-Gutzeit Kotka mill in Finland. The cautious approach for these types of effluents was necessary due to earlier reports on the toxicity of softwood extractives, bleaching agent hydrogen peroxide, complexing agent DTPA and high sulphur levels. Besides this, it was necessary to confirm that granular seed sludge would not deteriorate but would develop normally. The behaviour of hydrogen peroxide was especially interesting and the high redox potential caused could be resolved in a very cost-efficient way without utilising chemicals, enzymes or activated sludge. Resin acids were indentified to be responsible for reducing methanogenic activity considerably. They were eliminated during aerobic post-treatment to very low levels. Lab studies clearly demonstrated how methanogenic activity could be increased by adding dilution water or aerobically treated effluent. The concentration of the resin acids appeared to be associated with raw material (spruce, fir or pine), the season (summer or winter) and with fine fibrous material in the effluent. Sulphur levels in the effluent were relatively high, but resulting sulphide levels were not toxic to methanogens and COD/sulphur ratios were high enough to achieve acceptable removal efficiencies. The paper presents the results from research as well as flow diagrams of the full-scale plants, and results from more than one year full-scale operation at Quesnel River Pulp in B.C. Canada.

What to do after nutrient removal?

2001 ◽  
Vol 44 (1) ◽  
pp. 129-135 ◽  
Author(s):  
Jaap H.J.M. van der Graaf
Keyword(s):  
Nutrient Removal ◽  
Membrane Filtration ◽  
Wastewater Treatment Plants ◽  
Water Cycle ◽  
Advanced Treatment ◽  
Filtration Membrane ◽  
Treatment Processes ◽  
Treated Effluent ◽  
Almost All ◽  
The Cost

In the Netherlands, interest in advanced treatment is increasing now that almost all wastewater treatment plants apply full biological treatment and nutrient removal. The resulting effluents have an excellent quality which can be improved further by applying advanced treatment processes like flocculating filtration, membrane filtration, UV or activated carbon, and others. The treated effluent can be re-used for various purposes, as process water, household water, urban water, for groundwater suppletion and drinking water. Nowadays many applications are investigated. In order to confirm the applicability pilot test investigations are done at various WWTPs. The results are promising; the cost estimations show increasing prospects. This will finally lead to the maturity of the advanced treatment. It will certainly contribute to a more sustainable water cycle.

scholarly journals Novel Advanced Treatment of Physically Treated Effluent from Herbal Decoction Pieces Wastewater Using a Combined Ozone/Persulfate-UBAF Process

2019 ◽  
Vol 28 (4) ◽  
pp. 2857-2866 ◽  
Author(s):  
Guomin Tang ◽  
Weiyu Chen ◽  
Yujiang Wei ◽  
Ting Shao ◽  
Mengyuan Zhang ◽  
...  
Keyword(s):  
Advanced Treatment ◽  
Treated Effluent ◽  
Herbal Decoction

scholarly journals Performance of constructed wetlands with different substrates for the treated effluent from municipal sewage plants

2019 ◽  
Vol 9 (4) ◽  
pp. 452-462 ◽  
Author(s):  
Cao Shiwei ◽  
Jing Zhaoqian ◽  
Yuan Peng ◽  
Wang Yue ◽  
Wang Yin
Keyword(s):  
Constructed Wetlands ◽  
Municipal Wastewater ◽  
Treatment Process ◽  
Loading Rate ◽  
Municipal Sewage ◽  
Advanced Treatment ◽  
Plastic Ring ◽  
Treated Effluent ◽  
Proper Operation ◽  
Conducive Environment

Abstract Constructed wetlands (CWs) are effective as an advanced treatment process for the treated effluent of municipal wastewater plants. An appropriate substrate, suitable macrophytes, and proper operation are crucial for pollutant abatement. In this research, three subsurface flow CWs with various substrates were investigated. Pollutants abatement efficiency under various operational schemes were analyzed. The results showed that the satisfactory hydraulic loading rate was 0.25 m3/(m2·d). When the C/N ratio of influent was adjusted to 5.87 by adding a carbon source, the denitrification and dephosphorization efficiency would be improved, with 7–8 mg/L for total nitrogen (TN) and 0.4 mg/L for total phosphorus (TP) in the effluent, which can achieve the Class 1A Discharge Standard for discharge to natural waterways in China. A greater depth of submersion for the substrate layer resulted in a more conducive environment for the abatement of nitrogen substances. However, a 40-cm depth of submersion in CWs results in better removal efficiency of TN and TP. A plastic ring substrate (PRS) contains biological enzyme promoter formula, which was conducive to nitrifying and denitrifying bacteria. The biofilm affinity and coordination with plants made the PRS more effective than the other two substrates, especially for NO3–-N and TN abatement efficiency.

Use of ozone and hydrogen peroxide in the post-treatment of UASB treated alkaline fruit cannery effluent

2001 ◽  
Vol 44 (5) ◽  
pp. 69-74 ◽  
Author(s):  
G.O. Sigge ◽  
T.J. Britz ◽  
P.C. Fourie ◽  
C.A. Barnardt ◽  
R. Strydom
Keyword(s):  
Hydrogen Peroxide ◽  
Activated Carbon ◽  
Treatment Options ◽  
Water System ◽  
Granular Activated Carbon ◽  
Post Treatment ◽  
Legal Limit ◽  
Treated Effluent ◽  
Direct Discharge

UASB treatment of cannery effluents was shown to be feasible. However, the treated effluent still does not allow direct discharge to a water system and a further form of post-treatment is necessary to reduce the COD to lower than the legal limit of 75 mg/l. The use of ozone, hydrogen peroxide and granular activated carbon were used singly or in combination to assess the effectiveness as post-treatment options for the UASB treated alkaline fruit cannery effluent. Colour reduction in the effluent ranged from 15% to 92% and COD reductions of 26-91% were achieved. Combinations of ozone and hydrogen peroxide gave better results than either oxidant singly. The best results were achieved by combining ozone, hydrogen peroxide and granular activated carbon, and COD levels were reduced to levels sufficiently below the 75 mg/l limit.

Study on Treatment of Dyeing Wastewater by Fe0-H2O2 System

2014 ◽  
Vol 1048 ◽  
pp. 507-510
Author(s):  
Shan Hong Lan ◽  
Chuan Lu Wang ◽  
Jia Hao Sun ◽  
Heng Zhang
Keyword(s):  
Waste Water ◽  
Hydrogen Peroxide ◽  
Reaction Time ◽  
Waste Water Treatment ◽  
Advanced Treatment ◽  
Dyeing Wastewater ◽  
Biochemical Treatment ◽  
Printing And Dyeing Wastewater ◽  
Initial Ph ◽  
Biochemical Degradation

Printing and dyeing wastewater contained difficult biochemical degradation of organic matters. It required advanced treatment after the biochemical treatment. In this paper, effeccts of pH, the amount of iron and hydrogen peroxide, the ratio of iron and hydrogen peroxide and reaction time on the Fe0-H2O2system were studied. The results showed that all the above factors were important to dyeing waste water treatment by Fe0-H2O2system. CODCrremoval efficiency could archive 65% when the initial pH was 3, the iron powder capacity was 1.5g/L,the volume of hydrogen peroxide was 1ml/L, the reaction time was 40 min and the temperature was 30°C.

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