this document provides feasibility study of using treated domestic wastewater in concrete mixing. today, concrete is one of the most important construction materials. from first time that concert was used in construction materials, always the drinkable water used for concrete mixing water. domestic wastewater contains about 400 ppm of organic materials. after the treatment of wastewater, concen...

The city of Bekasi is experiencing rapid development so the demand for water increasing. To increase service coverage and meet drinking needs people City with a quality that meets Minister Health Regulation No. 492 2010, it planned to up rate capacity Teluk Buyung 4 WTP has 300 L/second raw source, namely West Tarum Secondary Channel. use design criteria from Equivalent evaluation, 3 literature...

Introduction Feed dilution or solids-liquid weight The English word "sedimentation" ratio is derived from the Latin verb "sedere" Size and shape of the particulate meaning to sink down. As a mineral solids processing unit operation, sedimentaSpecific gravity differential between tion has been defined as the separation the solids and liquid phases of a suspension into a supernatant presence of e...

Algaculture has the potential to be a sustainable option for nutrient removal at wastewater treatment plants. The purpose of this study was to compare the environmental impacts of three likely algaculture integration strategies to a conventional nutrient removal strategy. Process modeling was used to determine life cycle inventory data and a comparative life cycle assessment was used to determi...

The aim of this study was to evaluate the efficacy of a mobile laminar airflow (LAF) unit in reducing bacterial contamination at the surgical area in an operating theatre supplied with turbulent air ventilation. Bacterial sedimentation was evaluated during 76 clean urological laparotomies; in 34 of these, a mobile LAF unit was added. During each operation, settle plates were placed at four poin...

Four objectives of quantitative study of sediments are outlined, each of which requires specially collected samples. The corresponding techniques of collection are here called engineering sampling, descriptive sampling, environmental sampling, and correlation sampling, according to the purpose of the samples. The steps in the systematic collection of samples for the first three purposes are out...

A method for obtaining enriched populations of gonocytes from rat embryos at 18 days p.c. has been developed. Single cell suspensions with high cell yield and good viability of the cells were obtained by a collagenase/trypsin digestion of the testes. Cells were separated on the basis of size by the Staput technique of velocity sedimentation at unit gravity. Populations of 600,000 gonocytes (70-...