Effluents from wastewater treatment plants(WWTPs)are recognized as an important source for microplastic(MP)pollution in the receiving waters.The removal efficiency of MPs in WWTPs and the discharge flux remain largely...Effluents from wastewater treatment plants(WWTPs)are recognized as an important source for microplastic(MP)pollution in the receiving waters.The removal efficiency of MPs in WWTPs and the discharge flux remain largely unknown.The present study measured the MP abundances in the influents,effluents,and activated sludge in four domestic and one industrial WWTPs in Guangzhou,China.The MP abundance detected in influent samples were approximately one order of magnitude higher than those found in effluents,resulting in high removal efficiencies of MPs(97.4%-98.7%)in these WWTPs.A significant amount of the removed MPs deposited in the activated sludge,with abundances of MPs ranging from 7 to 888 pieces/g dry weight sludge.Microplastics remaining in effluents were discharged into the receiving river with releasing rates of ranging from(1.1±1.0)×10^(7)to(4.54±3.92)×10^(9)pieces per day.Results obtained in the present study suggest that the contribution of MPs from WWTPs to the aquatic environment is non-negligible and the application of sludge in the agricultural environment may bring additional MP pollution to agricultural soils.展开更多
As the world’s largest palm oil producer,Indonesia significantly benefits from its palm oil industry but also faces serious environmental challenges from palm oil mill effluent(POME)-a high-strength wastewater contai...As the world’s largest palm oil producer,Indonesia significantly benefits from its palm oil industry but also faces serious environmental challenges from palm oil mill effluent(POME)-a high-strength wastewater containing substantial organic matter,nutrients,suspended solids,and various chemical compounds.Sustainable and effective wastewater treatment strategies are urgently needed to address this issue.This review presents a comprehensive analysis of existing POME treatment technologies,including anaerobic digestion(AD),advanced oxidation processes(AOPs),membrane filtration,adsorption,phytoremediation,and microalgae-based systems.Each method is examined in terms of treatment efficiency,operational feasibility,and potential for imple-mentation under Indonesian conditions.While advanced processes,such as AOPs and membrane filtration,achieve high pollutant removal,they are often limited by operational costs.In contrast,biological approaches,such as AD and phytoremediation,offer both environmental benefits and economic value through the recovery of biogas,biofertilizers,and biomass.This review highlights the potential for integrating wastewater purification with resource recovery and valorization,supporting a shift toward more circular and sustainable management of POME.The insights provided are intended to guide future research,inform policy decisions,and facilitate the industrial adoption of optimized treatment systems.展开更多
The paper was monitored the conductivity （g.L＂l of NaCI）, the absorbances values （Abs） and the amount of TOC （total organic carbon）, before and after five consecutive dyeings made with reuse water, obtained fro...The paper was monitored the conductivity （g.L＂l of NaCI）, the absorbances values （Abs） and the amount of TOC （total organic carbon）, before and after five consecutive dyeings made with reuse water, obtained from treated effluent by UV/H202 photocatalysis. All rates of decolorization were above 92%, the removal of total organic carbon was above 89% in all treatments and the economy of NaCI was from 3.10 in the first recipe, 3.17 in the second, 3.49 in the third, 3.79 in the fourth and 4.05 in the fifth recipe. The five dyeings compared with same dyeings made with deionized water presented a color deviation （AE＊） below 1. The conventional dyeings would consume 80 L/kg against 40 L/kg used in the dyeing process proposed in this study, representing a great economy of water, with no discharge of effluents.展开更多
Sulfate reducing bacteria were isolated from the soil sample of Roaster-Acid unit of Debari Zinc Smelter of Hindustan Zinc Ltd., India and were adapted for effluent water of Zinc hydrometallurgy plant to sustain zinc ...Sulfate reducing bacteria were isolated from the soil sample of Roaster-Acid unit of Debari Zinc Smelter of Hindustan Zinc Ltd., India and were adapted for effluent water of Zinc hydrometallurgy plant to sustain zinc concentration of about 500 ppm and iron concentration of about 160 ppm with high acidity （pH 〈 1.0）. Nutrient broth, whey, ethanol and sucrose were tested as carbon source for SRB （sulfate reducing bacteria） out of which whey was found as the best electron donor to expedite the rate of biological treatment with SRB. A two stage anaerobic bioreactor was developed with a treatment capacity of 30 L effluent water in 4 days. The concentration of heavy metals in the treated water was within the permissible limits. The suggested methodology generates no solid waste, is environment friendly and may be commercially implemented for treatment of zinc plant effluent.展开更多
基金Supported by the National Natural Science Foundation of China(No.21936004)the Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)(No.SML2021SP208)the Fundamental Research Funds for the Central Universities(No.21623118)。
文摘Effluents from wastewater treatment plants(WWTPs)are recognized as an important source for microplastic(MP)pollution in the receiving waters.The removal efficiency of MPs in WWTPs and the discharge flux remain largely unknown.The present study measured the MP abundances in the influents,effluents,and activated sludge in four domestic and one industrial WWTPs in Guangzhou,China.The MP abundance detected in influent samples were approximately one order of magnitude higher than those found in effluents,resulting in high removal efficiencies of MPs(97.4%-98.7%)in these WWTPs.A significant amount of the removed MPs deposited in the activated sludge,with abundances of MPs ranging from 7 to 888 pieces/g dry weight sludge.Microplastics remaining in effluents were discharged into the receiving river with releasing rates of ranging from(1.1±1.0)×10^(7)to(4.54±3.92)×10^(9)pieces per day.Results obtained in the present study suggest that the contribution of MPs from WWTPs to the aquatic environment is non-negligible and the application of sludge in the agricultural environment may bring additional MP pollution to agricultural soils.
基金supporting the research project under the USK Leading Research Program-Doctoral Acceleration Scheme(PRRU-PD,Grant Number:444/UN11.2.1/PG.01.03/SPK/PTNBH/2024)coordinated by the Institute for Research and Community Services(LPPM-USK).
文摘As the world’s largest palm oil producer,Indonesia significantly benefits from its palm oil industry but also faces serious environmental challenges from palm oil mill effluent(POME)-a high-strength wastewater containing substantial organic matter,nutrients,suspended solids,and various chemical compounds.Sustainable and effective wastewater treatment strategies are urgently needed to address this issue.This review presents a comprehensive analysis of existing POME treatment technologies,including anaerobic digestion(AD),advanced oxidation processes(AOPs),membrane filtration,adsorption,phytoremediation,and microalgae-based systems.Each method is examined in terms of treatment efficiency,operational feasibility,and potential for imple-mentation under Indonesian conditions.While advanced processes,such as AOPs and membrane filtration,achieve high pollutant removal,they are often limited by operational costs.In contrast,biological approaches,such as AD and phytoremediation,offer both environmental benefits and economic value through the recovery of biogas,biofertilizers,and biomass.This review highlights the potential for integrating wastewater purification with resource recovery and valorization,supporting a shift toward more circular and sustainable management of POME.The insights provided are intended to guide future research,inform policy decisions,and facilitate the industrial adoption of optimized treatment systems.
文摘The paper was monitored the conductivity （g.L＂l of NaCI）, the absorbances values （Abs） and the amount of TOC （total organic carbon）, before and after five consecutive dyeings made with reuse water, obtained from treated effluent by UV/H202 photocatalysis. All rates of decolorization were above 92%, the removal of total organic carbon was above 89% in all treatments and the economy of NaCI was from 3.10 in the first recipe, 3.17 in the second, 3.49 in the third, 3.79 in the fourth and 4.05 in the fifth recipe. The five dyeings compared with same dyeings made with deionized water presented a color deviation （AE＊） below 1. The conventional dyeings would consume 80 L/kg against 40 L/kg used in the dyeing process proposed in this study, representing a great economy of water, with no discharge of effluents.
文摘Sulfate reducing bacteria were isolated from the soil sample of Roaster-Acid unit of Debari Zinc Smelter of Hindustan Zinc Ltd., India and were adapted for effluent water of Zinc hydrometallurgy plant to sustain zinc concentration of about 500 ppm and iron concentration of about 160 ppm with high acidity （pH 〈 1.0）. Nutrient broth, whey, ethanol and sucrose were tested as carbon source for SRB （sulfate reducing bacteria） out of which whey was found as the best electron donor to expedite the rate of biological treatment with SRB. A two stage anaerobic bioreactor was developed with a treatment capacity of 30 L effluent water in 4 days. The concentration of heavy metals in the treated water was within the permissible limits. The suggested methodology generates no solid waste, is environment friendly and may be commercially implemented for treatment of zinc plant effluent.
