Control of residual organic matter to reduce bacterial regrowth potential for wastewater reuse

2007 ◽  
Vol 24 (6) ◽  
pp. 1042-1046 ◽  
Author(s):  
Shijun Kim ◽  
Jeongsook Kim ◽  
Yutaka Suzuki
Keyword(s):  
Organic Matter ◽  
Wastewater Reuse ◽  
Bacterial Regrowth ◽  
Residual Organic Matter

CHANGES OF MICROPARTICLES AND BACTERIA IN GAPPEI-SYORI JOHKASOU AND RESIDUAL ORGANIC MATTER IN WATER OF THE TREATED WATER TANK

2018 ◽  
Vol 74 (7) ◽  
pp. III_415-III_422
Author(s):  
Yasushi ISHIGURO ◽  
Guangyu CUI ◽  
Tomonari FUJISAWA ◽  
Katsuhito YASUFUKU ◽  
Shinya OKUMURA ◽  
...  
Keyword(s):  
Organic Matter ◽  
Water Tank ◽  
Treated Water ◽  
Residual Organic Matter

Classification of algogenic organic matter concerning its contribution to the bacterial regrowth potential and by-products formation

1998 ◽  
Vol 37 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Wido Schmidt ◽  
Beate Hambsch ◽  
Heike Petzoldt
Keyword(s):  
Organic Matter ◽  
Chlorine Dioxide ◽  
Relative Increase ◽  
Residual Chlorine ◽  
Additional Increase ◽  
Bacterial Regrowth ◽  
Humic Compounds ◽  
Significant Difference ◽  
The Impact ◽  
By Products

The bacterial regrowth potential (BRP) and the by-products formation potential after the disinfection (DBP) are parameters recognized to be influenced by the origin of organic matter dissolved in water. A significant difference of the impact of humic compounds and algogenic organic matter (AOM), characteristic for raw waters from reservoirs, to both parameters can be assumed. In systematic laboratory experiments the influence of AOM on the BRP as well as DBP was examined. Different fractions of the AOM were chlorinated and treated with chlorine dioxide. In addition to that the influence of the ozonation was investigated. To assess the biodegradable fraction of the organic matter (BDOC) a large spectrum of by-products (aldehydes and keto-acids) was analyzed. The BRP in the water was determined by the measurement of the increase of biomass in the water samples. It could be proved, that the chlorination of intact algae cells containing waters may cause a significant increase of the biodegradability in the water if the residual chlorine is totally required. In the case of the disinfection of the AOM containing waters with chlorine dioxide the relative increase of the BRP was lower in comparison to the chlorinated waters. The preozonation of the algae containing waters indicates an additional increase of the BRP, but only by ozonation of the algae cells. The ozonation of the algae metabolites does not influence the BRP, but it causes a significant decrease of the THM-formation if chlorine is used for disinfection.

Beer Digestions for Metal Determination by Atomic Spectrometry and Residual Organic Matter

2004 ◽  
Vol 144 (1-3) ◽  
pp. 183-190 ◽  
Author(s):  
Dolores Bellido-Milla ◽  
Anabel O�ate-Ja�n ◽  
Jose M. Palacios-Santander ◽  
Dolores Palacios-Tejero ◽  
Mar�a P. Hern�ndez-Artiga
Keyword(s):  
Organic Matter ◽  
Atomic Spectrometry ◽  
Metal Determination ◽  
Residual Organic Matter

Importance of the order in enhancing EfOM removal by combination of BAC and MIEX®

2011 ◽  
Vol 64 (11) ◽  
pp. 2325-2332 ◽  
Author(s):  
A. Aryal ◽  
A. Sathasivan
Keyword(s):  
Organic Matter ◽  
Activated Carbon ◽  
Organic Carbon ◽  
Ion Exchange ◽  
Exchange Resin ◽  
Wastewater Reuse ◽  
Ion Exchange Resin ◽  
Wastewater Effluent ◽  
Biological Activated Carbon ◽  
Magnetic Ion

Biological activated carbon (BAC) is operationally a simple treatment which can be employed to remove effluent organic matter (EfOM) from secondary wastewater effluent (SWWE). Unfortunately, BAC removes only a limited amount of dissolved organic carbon (DOC). Thus, maximizing DOC removal from SWWE using BAC is a major concern in wastewater reuse. This study has investigated a hybrid system of BAC and Magnetic Ion Exchange Resin (MIEX®) for the enhanced removal of DOC. Performance of both BAC prior to MIEX® (BAC/MIEX®) and reverse (MIEX®/BAC) combination was evaluated in terms of DOC removal. The BAC/MIEX® showed much better DOC removal. This is because microbial activity in the BAC bed converted MIEX® non-amenable DOC to MIEX® amenable DOC. As a result, BAC/MIEX® combination synergised DOC removal. In addition, BAC was also found to be highly effective in reducing MIEX® dose for a given DOC removal from SWWE.

Tertiary treatment of secondary effluent using ultrafiltration for wastewater reuse: correlating membrane fouling with rejection of effluent organic matter and hydrophobic pharmaceuticals

2019 ◽  
Vol 5 (4) ◽  
pp. 672-683 ◽  
Author(s):  
Fangshu Qu ◽  
Hao Wang ◽  
Junguo He ◽  
Gongduan Fan ◽  
Zhihui Pan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Membrane Fouling ◽  
Wastewater Reuse ◽  
Secondary Effluent ◽  
Water Reclamation ◽  
Tertiary Treatment ◽  
Effluent Organic Matter ◽  
Retention Efficiency

Permeability loss and the low retention efficiency of soluble organics significantly restrict the application of ultrafiltration (UF) for water reclamation.

scholarly journals Characterization of clogging deposits in an irrigation pipeline and effect of post-aeration on clogging potential of tertiary-treated wastewater

2020 ◽  
Author(s):  
Hajar Benlouali ◽  
Ilham Karmal ◽  
Moulay Cherif Harrouni ◽  
Jaafar Ghanbaja ◽  
Dario Frascari ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Organic Matter ◽  
Wastewater Reuse ◽  
Cost Benefit ◽  
Post Treatment ◽  
Treated Wastewater ◽  
X Ray ◽  
Scanning Transmission ◽  
Water Scarce

Abstract In Agadir, a water-scarce Moroccan region, municipal and industrial wastewater is tertiary-treated to be reused in golf courses. Wastewater reuse has been constrained by severe clogging of emitters, which caused technical and financial problems. This study aimed to perform an in-depth characterization of the TWW in relation to its susceptibility to cause clogging, and to assess the capacity of an aeration post-treatment to reduce the clogging potential. The post-treatment consisted of injecting different airflows (0–33 L/(h Lreactor) into the TWW. The structural, morphological and elemental composition of the clogging matter collected in the irrigation pipeline was characterized using scanning electron microscopy, scanning transmission electron microscopy, X-ray diffraction and X-ray energy dispersive spectroscopy. The 15-day aeration post-treatment at 16.5 L/(h Lreactor) presented the best cost–benefit ratio. Organic matter was totally degraded. Calcium was reduced by 9%, bicarbonates by 54%. The analysis of the deposits induced by the aeration post-treatment revealed a relevant decrease of the major constituents of the clogging deposits found in the irrigation pipeline. The results show the effectiveness of post-aeration in biodegrading residual organic matter and precipitating several salts, thus reducing the clogging potential.

Reclaimed wastewater quality enhancement by oxygen injection during transportation

2011 ◽  
Vol 63 (4) ◽  
pp. 641-648 ◽  
Author(s):  
L. E. Rodríguez-Gómez ◽  
M. Álvarez ◽  
J. Rodríguez-Sevilla ◽  
M. C. Marrero ◽  
A. Hernández
Keyword(s):  
Organic Matter ◽  
Water Reuse ◽  
Wastewater Reuse ◽  
Organic Matter Content ◽  
Treatment Plant ◽  
Matter Content ◽  
Injection System ◽  
Nitrite Accumulation ◽  
Reclaimed Wastewater ◽  
Oxygen Injection

In-sewer treatments have been studied in sewer systems, but few have been carried out on reclaimed wastewater systems. A study of oxygen injection has been performed in a completely filled gravity pipe, 0.6 m in diameter and 62 km long, in cast iron with concrete inside coating, which is part of the reclaimed wastewater reuse scheme of Tenerife (Spain). A high pressure oxygen injection system was installed at 16.0 km from pipe inlet and a constant dosage of 30 mg/L O2 has been injected during six months, under three different operational modes (low COD, 63 mg/L; high COD, 91 mg/L; and partially nitrified water). Oxygen has been consumed in nitrification and organic matter reduction. Generally, nitrification is clearly favored instead of the organic matter oxidation. Nitrification occurs, in general, with nitrite accumulation due to the presence of free ammonia above 1 mg/L. Denitrification is in all cases incomplete due to a limitation of easily biodegradable organic matter content, inhibiting the appearance of anaerobic conditions and sulfide generation. A notable reduction of organic matter parameters is achieved (TSS below 10 mg/L), which is significantly higher than that observed under the ordinary transport conditions without oxygen. This leads to a final cost reduction, and the oxygen injection system helps water reuse managers to maintain a final good water quality in the case of a treatment plant malfunction.

The ignition at low temperatures of the organic matter in soils

1938 ◽  
Vol 28 (3) ◽  
pp. 393-400 ◽  
Author(s):  
J. S. Hosking
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Low Temperature ◽  
Low Temperatures ◽  
Carbonaceous Material ◽  
Volatile Constituents ◽  
Final Reaction ◽  
Major Reaction ◽  
Residual Organic Matter

The low temperature ignition of soil organic matter has been investigated for temperatures ranging from 100 to 500° C.Appreciable losses are found to occur below 100° C.; up to 200° C. heating results essentially in the distillation of volatile constituents, while between this temperature and 300° C. destructive distillation is the major reaction. These reactions are responsible for the removal of 85% of the soil organic matter.By 300° C. the greater part of the residual organic matter consists of carbonaceous material, and the final reaction is simple ignition of this material.Two hours’ heating of the soil at 450° C. or about half an hour at 500° C. are recommended for the removal of 99% of the soil organic matter.

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