reverse osmosis effluent Articles

Prediction of flux decline during membrane filtration of leather plant effluent

A membrane-based scheme has been proposed for the treatment of leather plant effluent. The effluent coming out from the various steps of leather plant are combined and Nanofiltration (NF) and Reverse Osmosis (RO) are adopted. Performances of two NF membranes are evaluated. Experiments are conducted using an unstirred batch cell. It is observed that a combined operation of NF using 400 MWCO ...

Dec. 12, 2011

By Inderscience Publishers

Application of biofilm membrane bioreactor and Reverse Osmosis membrane to the treatment of fresh and partially stabilised leachate

Membrane Bioreactor (MBR) with sponge cube media and reverse osmosis (RO) were investigated in laboratory scale. Fresh and partially stabilised leachate contained COD/N of 30 and 10 and BOD/COD of 0.7-0.9 and 0.4-0.7, respectively. Continuous and intermittent aeration modes were examined. COD and TKN removals were more than 90%. Highest nitrogen removal efficiency was achieved when aeration of 1 ...

Jul. 21, 2011

By Inderscience Publishers

The need for a novel method for achieving zero effluent-discharge status for ethanol distilleries: spentwash colour removal by reverse osmosis

Sustained industrial scale production of ethanol in India is dependent on the earliest possible implementation of zero effluent discharge. High pollution parameters of effluent made it commercially impossible. An urgent need for developing a method to attain a zero discharge status for distilleries was essential. The presently tried and tested methods had limitations for conclusive disposal of ...

Feb. 21, 2007

By Inderscience Publishers

Membrane bioreactor application within the treatment of high-strength textile effluent

A pilot-scale dual-stage membrane bioreactor (dsMBR) incorporating two ultra-filtration (UF) side-stream membrane modules was designed, constructed, operated and evaluated on-site for treating high-strength textile effluent. The effluent stream was characterised by a COD range of between 45 to 2,820 mg/L and an average BOD of 192.5 mg/L. The dsMBR achieved an average COD reduction of 75% with a ...

Feb. 1, 2012

By IWA Publishing

Reuse and recycling of secondary effluents in refineries employing advanced multi-barrier systems

In this paper the reclamation and reuse of municipal secondary effluents, as well as the reclamation and recycling of refinery secondary effluents, are technically and economically evaluated. It is shown that both practices are feasible and sustainable, and that the reclamation costs depend largely on specific circumstances such as legal requirements, price policy, reuse application, raw water ...

Oct. 1, 2010

By IWA Publishing

Project Orange County, CA, USA - Case Study

Trevi was awarded a California Energy Commission PIR Grant of $1.7 million to pilot a system to desalinate reverse osmosis concentrate at Orange County Water District (OCWD). OCWD is a world leader in waste water reuse since the 1970s. The old Water Factory 21 was recently replaced by the Ground Water Replenishment System, a 100 mgd facility that treats secondary wastewater effluent with ...

Nov. 23, 2018

By Trevi Systems, Inc.

A modelling system for wastewater treatment process evaluation and screening: methodology and case study

Considering nutrient reduction, China's wastewater treatment plants are facing the challenge to upgrade. A modelling system has been developed to screen suitable treatment processes, while statistical methods are not feasible due to data shortage. The system comprises a database to manage different treatment unit technologies, a module to generate candidate processes, a module to simulate ...

Mar. 17, 2011

By Inderscience Publishers

Permeability decline in nanofiltration/reverse osmosis membranes fed with municipal wastewater treated by a membrane bioreactor

Decline in the permeability in nanofiltration (NF)/reverse osmosis (RO) membranes that filtered effluents from a membrane bioreactor (MBR) treating municipal wastewater was investigated in this study. Four different 2-inch spiral-wound NF/RO membrane elements were continuously operated for 40 days. The results showed that the amount of deposits on the membrane surface did not affect the degree ...

May 9, 2013

By IWA Publishing

Treatment of dyeing effluent from tannery using membrane separation processes

Treatment of a dyeing bath of a tannery was carried out using a hybrid membrane-based separation scheme consisting of Nanofiltration (NF) followed by Reverse Osmosis (RO). Experiments were conducted using a cross-flow cell in continuous mode. The performance criteria of the separation scheme were evaluated in terms of dye concentration, Chemical Oxygen Demand (COD), Biological Oxygen Demand ...

Mar. 5, 2010

By Inderscience Publishers

Sublethal Toxicity Identification Evaluation Studies – Potential Impacts of conductive Dissolved Solids

ABSTRACT Treated effluent from the Firmenich wastewater treatment plant in Plainsboro, New Jersey (two staged activated sludge process designed for nitrogen and phosphorus removal) is discharged to the Millstone River. The New Jersey Department of Environmental Protection (NJDEP) permit requires a 96 hour acute toxicity test with Pimephales promelas (fathead minnows), with an LC50 value of 50%. ...

Oct. 13, 2007

By Water Environment Federation (WEF)

Removal of Cd(II) ions from aqueous solution and industrial effluent using reverse osmosis and nanofiltration membranes

Industrial effluents loaded with cadmium have contributed to the pollution of the environment and health troubles for humans. Therefore, these effluents need treatment to reduce cadmium concentration before releasing them to public sewage. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) processes, which can contribute to the removal of ...

Jun. 29, 2015

By IWA Publishing

Reliance industries’ jamnagar refinery selects hero for effluent recycle

The Facility Reliance Group is India's largest private sector enterprise with businesses spanning exploration and production of oil and gas, petroleum refining and marketing, petrochemicals (polyester, fiber intermediates, plastics and chemicals), textiles, retail and special economic zones. Reliance Industries Limited (RIL), the flagship company, is a Fortune Global 500 company and is the ...

Sep. 14, 2010

By Aquatech International Corporation

Removal of Cd(II) ions from aqueous solution and industrial effluent using reverse osmosis and nanofiltration membranes

Industrial effluents loaded with cadmium have contributed to the pollution of the environment and health troubles for humans. Therefore, these effluents need treatment to reduce cadmium concentration before releasing them to public sewage. The purpose of the research is to study the major role of reverse osmosis (RO) and nanofiltration (NF) processes, which can contribute to the removal of ...

Jun. 29, 2015

By IWA Publishing

Evaluation of UV System Performance and Challenges of UV Validation Testing at the Laguna County Sanitation District

ABSTRACTThe Laguna County Sanitation District (LCSD) Water Reclamation Plant, with a design capacity of 3.7 mgd, produces tertiary water that was designed to meet California Title 22 unrestricted re-use criteria. The disinfection in LCSD is provided by an in-line Aquionics Model 7500 medium pressure UV system containing four UV banks. California Department of Health and Services (CDHS) require ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Potential of UV/H2O2 oxidation for enhancing the biodegradability of municipal reverse osmosis concentrates

UVC/H2O2 and VUV/H2O2 oxidation processes were evaluated for the degradation of organic pollutants in reverse osmosis concentrate (ROC) produced from a municipal secondary effluent. It was found that the oxidation by UVC/H2O2 and VUV/H2O2 processes could be described as a pseudo first-order reaction. For UVC increased oxidation occurred with increasing H2O2 dosage up to 2 mM above which ...

Jan. 1, 2011

By IWA Publishing

Assessment of nanofiltration and reverse osmosis potentialities to recover metals, sulfuric acid, and recycled water from acid gold mining effluent

This work assessed the potential of nanofiltration (NF) and reverse osmosis (RO) to treat acid streams contaminated with metals, such as effluent from the pressure oxidation process (POX) used in refractory gold ore processing. NF and RO were evaluated in terms of rejections of sulfuric acid and metals. Regarding NF, high sulfuric acid permeation (∼100%), was observed, while metals were ...

Apr. 27, 2016

By IWA Publishing

Quantification of transient flux decline during membrane separation of tanning effluent from tannery

Cake filtration model is described to establish/quantify transient flux decline mechanism for membrane separation of tanning effluent collected from tannery. Two membrane operations, Nanofiltration (NF) followed by Reverse Osmosis (RO), are adopted to treat tanning effluent. The experiments are conducted in a continuous cross-flow mode of operation. Three-flow regimes, namely, laminar, laminar ...

Dec. 3, 2009

By Inderscience Publishers

Economic viability and critical influencing factors assessment of black water and grey water source-separation sanitation system

The black water and grey water source-separation sanitation system aims at efficient use of energy (biogas), water and nutrients but currently lacks evidence of economic viability to be considered a credible alternative to the conventional system. This study intends to demonstrate economic viability, identify main cost contributors and assess critical influencing factors. A technico-economic ...

Dec. 1, 2011

By IWA Publishing

Producing High-Purity Recycled Water for Industrial Applications with Microfiltration and Reverse Osmosis: Lessons Learned

ABSTRACTThe East Bay Municipal Utility District (District), with the assistance of Black & Veatch, studied the feasibility of treating secondary and tertiary effluents using microfiltration (MF) followed by reverse osmosis (RO) to produce high-purity, recycled water for use as boiler make-up water at a local refinery. A pilot-scale test program was developed to demonstrate the ability of the ...

Oct. 22, 2006

By Water Environment Federation (WEF)

Treatment of hospital wastewater effluent by nanofiltration and reverse osmosis

Considerable concern exists regarding the appearance and effects of trace and ultra trace pollutants in the aquatic environment. In this context, it is necessary to identify relevant hot spot wastewater – such as hospital wastewater – and to implement specific wastewater treatment solutions. Membrane bioreactor (MBR) technology seems to be a suitable pre-treatment approach for the subsequent ...

Apr. 1, 2010

By IWA Publishing

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