Technology For Domestic Wastewater Treatment Research Articles

Sustainability Analysis of Domestic Wastewater Treatment Technology Applied on Human Settlement in Swamp Area

Sustainability Analysis of Domestic Wastewater Treatment Technology Applied on Human Settlement in Swamp Area

Using Slow Sand Filtration System with Activated Charcoal Layer to Treat Salon Waste Water in a Selected Community in Cape Coast, Ghana

Discharge of untreated salon waste water into the surrounding environment in Ghana remains so probably because of poor knowledge of Ghanaians about treated waste water and its reuse as well as ignorance of waste water to ground water pollution. In Ghana, there is little or no knowledge on waste water treatment technology for salon waste water. In addition, a greater proportion of Ghanaians have no knowledge regarding reusability potentials of treated waste water. Thus, this study assessed the efficiency of a simple slow sand filtration system integrated with activated charcoal layer for salon waste water treatment. The study also assessed the perception of some selected Ghanaians in Cape Coast on reuse of treated salon waste water. For sixteen weeks, salon waste water collected from five different beauty salons in Amamoma was homogenized and treated. Selected parameters of both influent and effluent were analyzed. The percentage removals of some selected heavy metals present in the treated waste water (Effluent) show Copper 32.836 ± 7.013%, Cadmium 59.259 ± 8.006%, Zinc 83.333 ± 6.881%, Iron 38.095 ± 2.002%, Lead 100.000 ± 12.939% and Arsenic 100.000 ± 11.573%. pH 9.877 ± 1.107%, Conductivity 6.250 ± 0.819%, Total Dissolved Solids 5.810 ± 0.629%, Biological Oxygen Demand 21.780 ± 1.578%, Turbidity 93.798 ± 6.073%, Nitrates-nitrogen 67.727 ± 5.759%, Phosphate-phosphorus 67.614 ± 3.264%, Ammonia-Nitrogen 79.249 ± 8.311%, Total Suspended Solids 94.043 ± 0.948% and Chemical Oxygen Demand 84.487 ± 2.823%. All effluent parameters conformed to EPA Ghana standards for effluent discharge except turbidity, N-NO₃, conductivity, TSS, COD and N-NH₃. The results proved that treatment of salon waste water using an integration of slow sand filtration system and activated charcoal layer could be adopted as domestic waste water treatment technology especially in developing countries like Ghana since the percentage removal for four of the treated heavy metals (Cadmium, Zinc, Iron and Arsenic) were around 60% and above except for Iron and Copper which were below 40%.

Performance of a Subsurface Wastewater Infiltration System (SWIS) Using a Novel Biosubstrate

Subsurface wastewater infiltration treatment system (SWIS) is a domestic wastewater treatment technology. While the traditional technology has a large floor area, long starting period and low pollutants removal rate. A new biosubstrate that can be applied in SWIS is studied, experiments about its characteristics were performed, and treatment effect was compared. The results show that the biosubstrate has high biological activity, with it, SWIS has shorter starting period, better pollutants removal rate and consequently needs less floor space.

Performance comparison of direct membrane separation and membrane bioreactor for domestic wastewater treatment and water reuse

Two pilot-scale wastewater treatment systems - direct membrane separation (DMS) and membrane bioreactor (MBR) systems - were designed and constructed in order to investigate the feasibility of membrane filtration technology for domestic wastewater treatment and water reuse. A submerged-type hollow-fiber microfiltration (HF-MF) membrane module with pore size of 0.1μm was employed to build each pilot system. The systems were tested using low- and high-strength domestic wastewaters and the system performance was continuously monitored for a long period to compare filtration characteristics and effluent quality in each system. The MBR system showed much better performance than the DMS system in terms of filtration characteristics and effluent quality. Even though the mixed-liquor suspended solid (MLSS) content in the MBR system was much higher than that in the DMS system, the MBR filtration resistance was much lower than the DMS filtration resistance. The DMS system was not able to remove dissolved organic matter, which seemed to be a major component of membrane fouling. The MBR effluent quality such as COD, BOD, TOC and T-N was more stable and better than the DMS. In the MBR process, the organic removal efficiency remained more than 95% regardless of fluctuation in influent qualities. The effluent quality of both systems was satisfying the legal standards for water reuse in Korea. Rejection of pathogenic microorganisms by membrane filtration was also investigated.

Two-phase anaerobic technology for domestic wastewater treatment at ambient temperature

Anaerobic process phase separation was implemented in the present investigation, using two kinds of suspended anaerobic biomass – floccules and granules, respectively. Both phases of the process were proved to follow the classic Monod kinetics, the reported parameters of which indicate extremely high activity of the anaerobic biomass. This was achieved by providing appropriate hydrodynamic conditions in the bioreactors and creation of granulated (pelletized) biomass in the second one. The reasons and circumstances leading to these results are discussed, as well as the appropriate bioreactor construction schemes and the possibilities for implementation of the reported technology in practice and in coastal areas in particular.

Two-phase anaerobic technology for domestic wastewater treatment at ambient temperature

Anaerobic process phase separation was implemented in the present investigation, using Two kinds of suspended anaerobic biomass - floccules and granules, respectively. Both phases of the process were proved to follow the classic Monod kinetics, the reported parameters of which indicate extremely high activity of the anaerobic biomass. This was achieved by providing appropriate hydrodynamic conditions in the bioreactors and creation of granulated (pelletized) biomass in the second one. The reasons and circumstances leading to these results are discussed, as well as the appropriate bioreactor construction schemes and the possibilities for implementation of the reported technology in practice and in coastal areas in particular.

特集 生活系排水処理シンポジウムより 水環境保全のための生活排水処理技術の開発・普及のあり方

特集 生活系排水処理シンポジウムより 水環境保全のための生活排水処理技術の開発・普及のあり方

特集 生活系排水処理シンポジウムより 生活排水処理技術の現状と課題

特集 生活系排水処理シンポジウムより 生活排水処理技術の現状と課題