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Development of Malaysian Wastewater Polishing Index: Case Study on a Moving Bed Biofilm Reactor

100%

Kawan J. A. , Suja F. , Hasan H. A. , Jaafar O. , Rahman R. A.

tom Vol. 21, nr 5

1--8

Currently, extra treatment of secondary effluent to remove nitrogen and phosphorous may be required for its unrestricted reuse. This can be achieved by installing the wastewater polishing systems (or tertiary treatment). The wastewater polishing solutions are environmentally friendly, cheap and effective. The experiments were conducted on a pilot scale using a Moving Bed Biofilm Reactor (MBBR) with a capacity of 500 L to polish the municipal effluent from organic pollutant, undesirable nutrients and bacteria without the use of disinfectants. The major purpose was to define and apply a model for evaluating polishing of secondary effluent and implement the optimal technology for unrestricted use. Wastewater Polishing Index (WWPI) is a new tool that has been employed for rapidly evaluating of water quality improvement. It can be implemented into any surface water effluent treatment system or for reuse. WWPI can be an important tool designed for decision makers. The total average weight of six parameters (COD, BOD5, SS, Ammonia nitrogen, Total Phosphorus and Escherichia coli) are defined as the index, each one converted to sub-index which is scaled from zero to one hundred. If none of six parameters exist in the effluent WWPI, it is equal to zero, while if the parameters match the Malaysian’s effluent Standard B, It amounts to one hundred. In turn, WWPI is ninety when all six of them are equal to their corresponding Malaysian National Water Quality Standard (IV) for re-use. The index of wastewater polishing was validated and approved for the pilot MBBR study.

Niedobory wody i susze w polityce wodnej Unii Europejskiej

72%

Gromiec M.

tom Nr 4

24--27

W pracy przedstawiono problemy związane z niedoborami wody i suszami w dokumentach unijnych i krajowych.

The paper presents problems concerning water scarcity and droughts in EU and national documents.

Effect of UV/H2O2 on Fouling in Textile Wastewater Nanofiltration

72%

Żyłła R. , Sójka-Ledakowicz. J. , Michalska K. , Kos L. , Ledakowicz S.

Fibres & Textiles in Eastern Europe

2012

tom Vol. 20, no. 1 (90)

99-104

The aim of the work was to investigate the effect of UV/H2O2 chemical oxidation on fouling in the process of nanofiltration. Investigations were carried out for model textile wastewater from the dyeing of cellulose fibers with direct reactive dyes which contained anionic, non-ionic and cationic surfactants. The effect of preliminary UV/H2O2 oxidation of the wastewater on nanofiltration parameters was also investigated. It was found that the preliminary UV/H2O2 oxidation reduced fouling and thus increased the nanofiltration efficiency of wastewater containing cationic and non-ionic surfactants, which are derivatives of polysiloxanes.

Celem pracy było zbadanie wpływu chemicznego utleniania za pomocą UV/H2O2 na efekt foulingu w procesie nanofiltracji. Badania prowadzono dla modelowych ścieków włókienniczych z procesów barwienia włókien celulozowych barwnikami reaktywnymi bezpośrednimi zawierającymi anionowe, niejonowe lub kationowe środki powierzchniowo czynne (SPC). W pracy zbadano wpływ wstępnego utleniania za pomocą H2O2/UV ścieków na parametry nanofiltracji. Stwierdzono, że zastosowanie wstępnego utleniania za pomocą H2O2/UV powoduje zmniejszenie efektu foulingu, a tym samym zwiększa wydajność nanofiltracji w przypadku ścieków zawierających kationowe i niejonowe związki powierzchniowo-czynne będące pochodnymi polisiloksanów.

Circular economy in sustainable water management – theory and practice

72%

Lorek E. , Lorek A.

tom nr 4

50--59

The article presents the principles of the circular economy implemented in the management of water resources. Special attention was paid to problems in water management in new market conditions related to the adoption of the new Water Law. Changes in water management were reviewed in the light of the provisions of the adopted new Water Law and threats resulting from its introduction, especially in the light of the impact on budgets of households and enterprises. Examples of good practices in the implementation of the circular management principles in water ecosystems in the country and around the world were also presented.