In this study, a full-scale membrane bioreactor (MBR) was monitored over a period exceeding 6 months. Two common chemical cleaning modes, chemically enhanced backwash and clean in place, with sodium hypochlorite were monitored with respect to microorganism log removal value (LRV). Overall, impact to microorganism LRV for virus, bacteria and protozoa due to cleaning was negligible with respect t...

A model was developed and calibrated to experimental data, to formulate a theoretical description of nitrification in bead filters. The model results were consistent with the literature, indicating that the inverse relationship between solids accumulation and nitrification is mediated by an oxygen limitation. This result was central to an explanation of why differing optimal backwash intervals ...

Based on a “filter press backwash–chemical precipitation–gaseous membrane absorption” process, treatment of harmless cyanide tailings was conducted using from gold smelting enterprises (Yunnan Province, China) as the research object. The effects air-drying time, backwash water parameters, initial pH acidification, NaHS dosage, cyanide-containing flow rate, and gaseous stages process were invest...

Seawater ultrafi ltration (UF) as a pretreatment of reverse osmosis (RO) process in a thermal power plant was investigated using a 100 kDa hollow fi ber membrane. The choice of the UF physical backwash conditions remains arbitrary or ensuing from a sensibility study. As the optimum must take into account the factors interactions, we led a response surface study to analy...

Biofiltration for drinking water treatment has several quality benefits but questions remain about biofilter start-up in temperate climates where temperature and changes can impact performance. A year-long full-scale demonstration was performed with biofilters operated parallel to chlorinated filters (O1) monitor the development of microbiota across acclimation period respect removal Mn total o...

The dataset presented in this article are related to the research article entitled "Hybrid coagulation-UF processes for spent filter backwash water treatment: a comparison studies for PAFCl and FeCl3 as a pre-treatment" (Ebrahimi et al., 2017) [1]. This article reports the cost estimation for treating produced spent filter backwash water (SFBW) during water treatment in Isfahan- Iran by various...

The occurrence of Cryptosporidium and Giardia in indoor swimming pools in the Netherlands was studied at five locations. The backwash water from seven pool filters was analysed for the presence of Cryptosporidium oocysts and Giardia cysts for a period of 1 year. Of the 153 samples of filter backwash water analysed, 18 (11.8%) were found positive for either Cryptosporidium (4.6%), Giardia (5.9%)...

Swash zone sheet flow and suspended sediment transport rates are estimated on a 14 coarse sand beach constructed in a large-scale laboratory wave flume. Three test cases under 15 monochromatic waves with wave heights of 0.74 m and wave periods of 8 and 12.2 s were 16 analyzed. Sediment flux in the sheet flow layer exceeds several hundred kg m s during both 17 uprush and backwash. Suspended sedi...

Efficiently making use of granular activated carbon (GAC) to reduce pollution is always a golden goal for water industry. We developed ultrasonication collection method for determination of the biomass and microbial attachment and growth in activated carbon filter. Based on this method, we found that using hydraulic cycle to immobilize cells onto GAC can greatly improve the attachment of inocul...