MBR-RO for high-grade water (NEWater) production from domestic used water

2006 ◽  
Vol 1 (2) ◽  
Author(s):  
G.H. Tao ◽  
K. Kekre ◽  
J.J. Qin ◽  
C.L. Ting ◽  
M.H. Oo ◽  
...  
Keyword(s):  
Drinking Water ◽  
Pilot Study ◽  
Membrane Bioreactor ◽  
Shock Loading ◽  
New Technologies ◽  
Pilot Scale ◽  
Integrated System ◽  
High Grade ◽  
Drinking Water Standards ◽  
Reclaim Water

Singapore has been developing new technologies to reclaim water to drinking water standards from domestic used water. The water produced with drinking water standards by dual membrane process is called NEWater in Singapore. After the successful pilot study of membrane bioreactor for water reclamation, MBR-RO integrated system was also studied at pilot scale to investigate the new option of producing NEWater at a more reliable and economical way. A MBR-RO pilot plant with capacity of 20m3/d was used for this study. Settled domestic used water was used for the feed. The pilot study demonstrated that the MBR offered better synergy between membrane and activated sludge process. The new MBR-RO process could produce equivalent or better high grade water (NEWater) and have better resistance to shock loading than the conventional AS-MF/UF-RO from the domestic used water. RO membranes in the MBR-RO process could be operated 30% higher flux than in AS-MF/UF-RO process for NEWater production.

Removal and growth of microorganisms across treatment and simulated distribution at a pilot-scale direct potable reuse facility

2020 ◽  
Vol 6 (5) ◽  
pp. 1370-1387 ◽  
Author(s):  
Scott E. Miller ◽  
Roberto A. Rodriguez ◽  
Kara L. Nelson
Keyword(s):  
Drinking Water ◽  
Pilot Scale ◽  
Growth Potential ◽  
Advanced Treatment ◽  
Potable Reuse ◽  
Drinking Water Standards ◽  
Simulated Distribution ◽  
Direct Potable Reuse ◽  
Improved Methods

Multi-barrier advanced treatment trains are able to purify wastewater to drinking water standards, but improved methods are needed to better understand microbial concentrations, viability, and growth potential throughout treatment and distribution.

scholarly journals The efficiency of a membrane bioreactor in drinking water denitrification

2015 ◽  
Vol 21 (2) ◽  
pp. 269-275
Author(s):  
Aleksandra Petrovic ◽  
Marjana Simonic
Keyword(s):  
Drinking Water ◽  
Flow Rate ◽  
Membrane Bioreactor ◽  
Nitrate Removal ◽  
Maximum Flow ◽  
Pilot Scale ◽  
Operational Parameters ◽  
Flow Rates ◽  
Removal Capacity ◽  
Removal Efficiencies

The membrane bioreactor (MBR) system was investigated regarding its nitrate removal capacity from drinking water. The performance of a pilot-scale MBR was tested, depending on the operational parameters, using sucrose as a carbon source. Drinking water from the source was introduced into the reactor in order to study the influence of flow-rate on the nitrate removal and denitrification efficiency of drinking water. The content of the nitrate was around 70 mg/L and the C/N ratio was 3:1. Nitrate removal efficiencies above 90% were obtained by flow-rates lower than 4.8 L/h. The specific denitrification rates varied between 0.02 and 0.16 g/L NO3/ (g/L MLSS?d). The efficiencies and nitrate removal were noticeably affected by the flow-rate and hydraulic retention times. At the maximum flow-rate of 10.2 L/h still 68% of the nitrate had been removed, whilst the highest specific denitrification rate was achieved at 0.2738 g/L NO3/ (g/L) MLSS?d). The maximum reactor removal capacity was calculated at 8.75 g NO3/m3?h.

Technological Solution for the Treatment of Wastewater Resulting from Autochthonous Aquacultures in Order to Protect the Marine Water Quality

2018 ◽  
Vol 68 (12) ◽  
pp. 2752-2755
Author(s):  
Carmen Tociu ◽  
Tania Zaharia ◽  
Elena Diacu ◽  
Cristina Maria ◽  
Florica Marinescu ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Black Sea ◽  
Pilot Scale ◽  
Integrated System ◽  
The Black Sea ◽  
Technological Solution ◽  
Aluminium Sulphate ◽  
Metallurgical Slags ◽  
Treatment Step

This paper depicts the research conducted at a micro-pilot scale on autochthonous cultures in order to develop adequate technological solutions for the treatment of wastewater resulting from shrimp cultures (Palaemonidae) that would ensure the protection of the Black Sea ecosystem and constitute an applicable tool for the development of aquaculture in Romania. The proposed objectives were attained by adopting an integrated system of marine cultures shrimps-mussels-macrophyte algae, followed by a conventional chemical treatment step using aluminium sulphate recovered from metallurgical slags. This system together with wastewater treatment ensures an optimum development of species and a minimum load of pollutants in the aquatic environment.

Nanofiltration of colored surface water: Quebec's experience

2003 ◽  
Vol 3 (5-6) ◽  
pp. 15-22
Author(s):  
P. Kouadio ◽  
M. Tétrault
Keyword(s):  
Drinking Water ◽  
Surface Water ◽  
Membrane Fouling ◽  
Pilot Scale ◽  
Operating Conditions ◽  
Quebec City ◽  
Water Regulation ◽  
Eastern Canada

Three colored surface water nanofiltration pilot-scale projects were conducted in the province of Quebec (eastern Canada), between November 2000 and March 2002, by the company H2O Innovation (2000) inc., for the municipalities of Lac Bouchette, Latulipe-et-Gaboury and Charlesbourg (now part of Quebec City). Results indicated that nanofiltration permeate quality has an advance on present drinking water regulation standard in Quebec, but important membrane fouling occurred. Fouling can be controlled by pretreatment and optimization of the operating conditions.

scholarly journals Prediction of Key Crop Growth Parameters in a Commercial Greenhouse Using CFD Simulation and Experimental Verification in a Pilot Study

Agriculture ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 658
Author(s):  
Subin Mattara Chalill ◽  
Snehaunshu Chowdhury ◽  
Ramanujam Karthikeyan
Keyword(s):  
Pilot Study ◽  
Cfd Simulation ◽  
Growth Parameters ◽  
Environmental Parameters ◽  
Pilot Scale ◽  
Crop Growth ◽  
Hvac System ◽  
Implementation Phase ◽  
Design And Implementation ◽  
Successful Design

Controlled crop growth parameters, such as average air velocity, air temperature, and relative humidity (RH), inside the greenhouse are necessary prerequisites for commercial greenhouse operation. Frequent overshoots of such parameters are noticed in the Middle East. Traditional heating ventilation and air-conditioning (HVAC) systems in such greenhouses use axial fans and evaporative cooling pads to control the temperature. Such systems fail to respond to the extreme heat load variations during the day. In this study, we present the design and implementation of a single span, commercial greenhouse using box type evaporative coolers (BTEC) as the backbone of the HVAC system. The HVAC system is run by a fully-automated real time feedback-based climate management system (CMS). A full-scale, steady state computational fluid dynamics (CFD) simulation of the greenhouse is carried out assuming peak summer outdoor conditions. A pilot study is conducted to experimentally monitor the environmental parameters in the greenhouse over a 20-h period. The recorded data confirm that the crop growth parameters lie within their required ranges, indicating a successful design and implementation phase of the commercial greenhouse on a pilot scale.

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