Decentralized wastewater treatment technology, especially natural ecological technology has widely been used in rural regions. In this paper, a comprehensive life cycle assessment (LCA) of typical - artificial wetland was conducted. SimaPro software applied to simulate the facility, and CML2 baseline2000 impact evaluation method selected analyze environmental loads benefits during cycle. The fa...

The vortex-ingesting stirred tank reactor uses a combination of a helical screw impeller and concentric draft-tube to entrain and recycle headspace gas and disperse it as bubbles in a liquid reaction solvent. This study presents an experimental characterisation of a 0.29 m diameter vortex-ingesting gas-liquid stirred reactor, operated with solids mass fractions from 0 to 25%, over a range of sp...

Activated Sludge Treatment is a biological wastewater treatment process which speeds up waste decomposition by adding Activated sludge into wastewater, and the mixture is aerated and agitated for a specified amount of time there by allowing the activated sludge to settle out by sedimentation and is disposed of (wasted) or reused (returned to the aeration tank). It is to everyone’s advantage for...

Abstract. Anelia N, Suhartono S, Hayati Z. 2023. Abundance and phenotypic-genotypic analysis of antibiotic-resistant Escherichia coli isolated from wastewater the Zainoel Abidin Hospital, Banda Aceh, Indonesia. Biodiversitas 24: 2294-2301. Excessive inappropriate use antibiotics can initiate emergence antibiotic resistance in bacteria. Wastewater Treatment Plant (WWTP) is believed to be a reser...

The sequencing batch reactor (SBR) process is a sequential suspended growth (activated sludge) process in which all major steps occur in the same tank in sequential order (figure 1). There are two major classifications of SBRs: the intermittent flow (IF) or “true batch reactor,” which employs all the steps in figure 1, and the continuous flow (CF) system, which does not follow these steps. Both...

An anaerobic-anoxic/oxic (AA/O) five-tank biological process called five-step continuous flow activated sludge process (FSCFASP) was developed to force the oscillation of organic matter and nutrient concentrations in process reactors. The run scheme and schematic diagram of FSCFASP was described. The run cycle was divided into two symmetrical half cycles with eight periods during each cycle. Th...

In commercial penicillin production the fermentation medium is usually seeded with a mycelial (vegetative) inoculum of Penicillium chrysogenum prepared by the following transfers: spores -+ germinator tank -seed tank. However, depending on the fermentation conditions, the operation in the germinator tank can be successfully eliminated. Goldschmidt and Koffler (1950) used spore-inoculated fermen...

the effluent quality of a sewage treatment plant using activated sludge process and finally secondary treatment depends on the flocculation efficiency and settling of the flocs. the survey of various treatment processes in water and wastewater treatment shows that temperature and ph are the important factors affecting efficiency of flocculation and settling properties. this study was performed ...