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The effectiveness of gas recovery systems for managing odour from conventional effluent treatment ponds in Palm oil mills in Malaysia

Chung Andrew Yap Kian, Qamaruz Zaman Nastaein, Yaacof Narushikin, Yusoff Syafinah, Abd Manaf Fatah Yah, Mohamed Halim Rohaya, Abd Majid Rusnani

Civil and Environmental Engineering Reports

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2019

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Vol. 29, no. 3

70--85

EN

Gas recovery systems at palm oil mills enable the curtailment of uncontrolled greenhouse gas emissions from open anaerobic pond, but can also reduce odour, an aspect which has not yet been substantiated. The objective of this study is to evaluate the odour emission from palm oil mill effluent and the effectiveness of covers and tank digester in reducing odour emission from the open lagoons. Odour samples were obtained from the cooling ponds in conjunction with in-field odour assessment performed on site. Results demonstrated that odour released from open ponding or covered lagoon were almost comparable, ranging from 33,150 – 162,000 OU/m3, and 68,705 – 102,000 OU/m3, respectively. In contrast, odour emission from cooling pond which used tank digester system seemed markedly lower, ranging between 13,000 – 76,000 OU/m3. In fact, the analysis of ambient air close to anaerobic tank digesters proved a reduction of odour emission to the surroundings (with 3.5 OU/m3, weak intensity) compared to open pond (with 2700 OU/m3, strong intensity) or covered lagoon (with 111 OU/m3, distinct intensity). In conclusion, gas recovery systems at palm oil mills should be promoted not only towards the management of greenhouse gaseous, but also as an odour impact management strategy.

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Comparison of effectiveness of advanced treatment of municipal wastewater by sorption and nanofiltration. Separate processes and integrated systems

Bohdziewicz J., Kamińska G., Pawlyta M., Łukowiec D.

Environment Protection Engineering

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2015

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Vol. 41, nr 2

119--132

EN

The feasibility of effluent treatment in separate processes and in integrated systems has been compared. In the sorption process, carbon nanotubes were used in a pressure installation, enabling execution of the process of sorption with nanofiltration in a cross-flow system. Evaluation of treatment effects based on the measurement of typical pollution parameters (COD, TOC, phenolic index, forms of nitrogen and phosphorus) and concentration of bisphenol A. The results show poor feasibility of sorption as a process for advanced treatment of municipal effluent. Effluent polishing in integrated sorption-nanofiltration systems, however, guaranteed high removal rates of organic and inorganic pollutants.

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COD reduction studies of paper mill effluent using a batch recirculation electrochemical method

Kannadasan T., Sivakumar V., Ahmed Basha C., Parwate A. V., Senthilkumar K., Kannan K.

Polish Journal of Chemical Technology

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2011

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Vol. 13, nr 3

37-41

EN

The conventional method of treating pulp and paper mill effluent involves the biological oxidation by bacterial action of aerobic and anaerobic conditions and aerobic lagooning method, which are less efficiency of removing COD. To overcome the drawbacks of the existing treatment process, in the present work an attempt has been made to study the electro oxidative destruction of the pulp and paper mill effluent using an electrochemical method and the effect of various parameters such as concentration of supporting electrolytes, current densities, flow rates of electrolyte and reservoir volumes of the effluent were conducted. From the experimental results it is observed that the rate of reduction of COD of the effluent increased with an increase in the supporting electrolyte (sodium chloride) concentration, current density where as it decreased with increase in the reservoir volume and the flow rate of electrolyte. The residence time distributions studies have also been conducted to study the behavior of the electrochemical reactor.

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Pilot study on chemical industrial wastewater in tertiary treatment with biofilm for washing belts

Liu J.-M., Xu Y., Zhu Z.-R., Qiao S.-Y.

Environment Protection Engineering

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2011

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Vol. 37, nr 1

93-104

EN

The biochemical characteristics of chemical secondary effluent of the wastewater treatment plant of Jilin Chemical Industry Corporation have higher residual concentration of CODcr and NH3-N, and lower residual concentration of BOD5 and alkalinity. These biochemical characteristics of chemical secondary effluent in tertiary treatment were studied with a pilot system of biological contact aerators (BCAs) to meet national discharged limits and requirements for washing belts, particularly to meet national limits of ammonia and benzene substances, etc. in the air of a workshop. The highest removal efficiency was obtained in the BCAs system and a scientific basis of reference was provided for reforming the system of pulse flocculated clarifier which can constitute a new approach in tertiary wastewater treatment for washing belts.