domestic wastewater Articles
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Sludge accumulation and conversion to methane in a septic tank treating domestic wastewater or black water
Although the septic tank is the most applied on-site system for wastewater pre-treatment, limited research has been performed to determine sludge accumulation and biogas production in the tank. Therefore a dynamic mathematical model based on the Anaerobic Digestion Model No. 1 (ADM1) was developed for anaerobic digestion of the accumulated sludge in a septic tank treating domestic wastewater or ...
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Evapotranspiration bed system for the wastewater from scenic and environmentally sensitive areas
The Onsite Wastewater Treatment (OWT), also commonly known as Septic Tank System, is supposedly to provide adequate treatment for individual private dwellings. In reality, because of its poor efficiency and lack of sound engineering design, the OWT has become a modern façade to pollute the land and groundwater resource. The evapotranspiration bed (ET-bed) system can effectively treat ...
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Impacts of onsite greywater reuse on wastewater systems
Together with significant water savings that onsite greywater reuse (GWR) may provide, it may also affect the performance of urban sewer systems and wastewater treatment plants (WWTPs). In order to examine these effects, an integrated stochastic simulation system for GWR in urban areas was developed. The model includes stochastic generators of domestic wastewater streams and gross solids ...
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On-site treatment of domestic wastewater using a small-scale horizontal subsurface flow constructed wetland
A small-scale horizontal subsurface flow constructed wetland, located in North Greece, was designed and constructed to treat wastewater from a single-family residence. A three-year monitoring program was undertaken to evaluate the performance of this system. The monitoring campaigns were organized every 7 days. Water quality samples were collected at the inlet, at intermediate points (i.e. at the ...
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Commercial wastewater treatment solutions
Neatport PTY LTD, A.B.N. 62 063 770 534 is a registered company in Queensland, Australia, trading as Suncoast Waste Water Management (SWWM) which has been a registered business since 1983 manufacturing the ‘OZZI KLEEN’ range of wastewater treatment solutions for both domestic household, marine, and commercial applications. As the team behind the Ozzi Kleen product range, we strives to engineer, ...
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Maintenance for septic tanks
Septic tanks are widely used for on site sewage treatment for domestic homes which are not connected to the sewer system. Little attention is given to the septic tank until there are problems such as smells or poor drainage or ponding on the surface. A little maintenance of the septic tank can be very helpful in maintaining performance of the septic tank. The outflow from a septic tank percolates ...
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Premier Tech Water & Environment selects biomarble from the Warden Biomedia range for London gateway port project - Case Study
Premier Tech is a world leading provider of onsite and decentralised wastewater treatment, water storage and rainwater harvesting solutions. A wholly owned subsidiary of Premier Tech, it has a reputation for developing and commercialising high-performance water and wastewater technologies across the domestic, commercial and industrial sectors and is associated with over 100,000 water and ...
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A novel image processing-based system for turbidity measurement in domestic and industrial wastewater
Wastewater treatment facilities are continually challenged to meet both environmental regulations and reduce running costs (particularly energy and staffing costs). Improving the efficiency of operational monitoring at wastewater treatment plants (WWTPs) requires the development and implementation of appropriate performance metrics; particularly those that are easily measured, strongly ...
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Electrolytic removal of ammonia from aqueous phase by Pt/Ti anode
This study investigated the mechanism and kinetic modeling of electrolytic degradation of ammonia with Pt/Ti anode. The results show that ammonia oxidation from direct oxidation or indirect oxidation with hydroxyl radicals was slow but can be observed under pH 9 and high initial ammonia concentration of 1,050 mg N L−1. Indirect oxidation with HOCl was the mechanism for the ...
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Modeling on-site wastewater treatment system performance fragility to hydroclimate stressors
Increasing variability of climate-related factors, especially precipitation and temperature, poses special risks to on-site wastewater treatment systems (OWTS), which depend on subsurface saturation conditions for treatment and dispersion of wastewater. We assess OWTS fragility – the degree to which a system loses functionality – as a step to characterizing the resilience of residential ...
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Surface treatments: metal finishing in the automotive sector - Case Study
THE CLIENT The client is an American chemical company offering metal finishing services for automotive and non-automotive ...
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Use of Fecal Steroids To Infer the Sources of Fecal Indicator Bacteria in the Lower Santa Ana River Watershed, California: Sewage Is Unlikely a Significant Source
The Santa Ana River (SAR), CA and adjacent wetlands have been identified as potential sources of fecal indicator bacteria (FIB) to the surf zone at Huntington Beach, CA. A suite of fecal steroids, including coprostanol (COP), epicoprostanol (eCOP), cholesterol (CHOE), cholestanol (CHOA), R cholestanone (aONE), â-cholestanone (bONE), â-sitosterol (bSIT), stigmasterol (STIG), ...
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Antimicrobial resistance of fecal indicators in disinfected wastewater
The main objective of the study was to assess the potential of three systems (UV irradiation, ozonation, and micro/ultrafiltration) operated in a pilot scale in removal of antimicrobial-resistant fecal bacteria from secondary effluent of the local wastewater treatment plant (700,000 population equivalent). The effectiveness of the processes was analysed using the removal ratio of fecal indicators ...
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Subsurface trickle irrigation system for on–site wastewater disposal and reuse
Summary of Process Description The subsurface trickle irrigation system described in this report utilizes an aerobic treatment system in conjunction with a proven subsurface water application system developed by GEOFLOW, Inc. to offer a total system concept for safe and effective sewage disposal for site conditions considered marginal or unsuitable for conventional septic tank systems. The ...
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Resistance of
Escherichia coli andEnterococcus spp. to selected antimicrobial agents present in municipal wastewaterIn this study, the susceptibility to erythromycin (E) and to trimethoprim/sulfamethoxazole (SXT) among isolates of Enterococcus spp. and Escherichia coli was tested, respectively. Both fecal indicators were detected and isolated from raw (RW) and treated wastewater (TW) as well as from samples of activated sludge (AS) collected in a local wastewater treatment plant (WWTP). Biodiversity of ...
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Reuse of wastewater effluent in concrete mixing and the effect of high temperatures on its residual properties
This paper investigates the suitability of using wastewater effluent for mixing in concrete. In particular, the effect of elevated temperatures up to 700°C on the compressive strength of concrete made with treated wastewater has been experimentally studied. The concrete specimens consisted of cubes that were cast using potable water (PW), primary treated wastewater (PTWW), secondary treated ...
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Cocopeat Biofiltration Systems
A cocopeat biofilter system is a low-cost and low-maintenance on-site wastewater treatment solution that is modular in design and applicable for residential, institutional and commercial establishments. The system can be designed to passively treat septic tank effluent to meet secondary treatment levels. For residential use, the biofilter unit consists of a relatively small ...
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Yogurt plant - Case study
User: Yogurt Manufacturing Plant Materials: Returned and rejected products, in-plant wet waste Before Installation Of Extruder MONTHLY WASTE VOLUME: 28 loads, 38 cubic yards each. Average of 10 tons per load. MONTHLY EXPENSE – HAULING & TRANSPORTATION: $20,000.00 This plant was utilizing a 38 yard self-contained compactor / container which was being emptied on a daily basis. ...
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Performance evaluation of a novel reciprocation membrane bioreactor (rMBR) for enhanced nutrient removal in wastewater treatment: a comparative study
This study compared and evaluated the performance of a conventional membrane bioreactor (MBR) and a novel reciprocation MBR (rMBR) which used mechanical membrane reciprocation in place of membrane air scouring in pilot-scale tests. Each system was independently operated for 280 days at a local wastewater treatment plant for a parallel assessment of operating performance. The rMBR was found to ...
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Impact of inocula and growth mode on the molecular microbial ecology of anaerobic ammonia oxidation (anammox) bioreactor communities. Water Research
Abstract: The composition of distinctly inoculated granular anammox and biofilm-based completely autotrophic nitrogen removal over nitrite (CANON) bioreactors was investigated from startup through continuous long-term operation via denaturing gradient gel electrophoresis (DGGE) and sequencing. The granular anammox reactor was seeded with sludge from an operational anammox reactor in Strass, ...
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