scholarly journals Application of Biofilm Carrier in Aerobic Reactors as a Method to Improve Quality of Wastewater Treatment

Hydrology ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 77
Author(s):  
Nikolay Makisha
Keyword(s):  
Ammonia Nitrogen ◽  
Filling Ratio ◽  
Treatment Quality ◽  
Secondary Treatment ◽  
Biofilm Carrier ◽  
Aerobic Reactor ◽  
Biofilm Carriers ◽  
Optimal Efficiency ◽  
Positive Results

The research revealed in the paper considers the improvement of secondary treatment of wastewater in the aerobic reactor to provide removal of organics and nutrients. There were five types of polymer biofilm carriers taken into account initially; however, two of them were decided not to apply due to technological reasons. The main part of the research was divided into three substages to investigate each type of biofilm carrier. According to the literature review, the optimal efficiency may be reached if the carrier filling ratio is 10 to 30% of reactor volume. On this basis, there were three benches launched at each sub-stage with a corresponding filling ratio of 10, 20, and 30%. The fourth reactor at each sub-stage had no floating carrier to control the experiment. The research of all three types of carriers showed the effect of BOD removal in the range of 95–96% for benches equipped with a floating carrier, which can be considered similar to the control bench with the efficiency of 92%. In the case of ammonia nitrogen, the removal control bench showed only 55% of efficiency, while floating carriers helped to increase the efficiency up to 70–86%. Despite obtaining relatively positive results, the research has to be continued to achieve regulation requirements in treatment quality.

Study on Pollution Status of Nitrogen and Phosphorus in Typical Reservoirs in Liaoning Province

2013 ◽  
Vol 777 ◽  
pp. 420-423
Author(s):  
Chen Xi Mi
Keyword(s):  
Water Quality ◽  
Ammonia Nitrogen ◽  
Point Sources ◽  
Liaoning Province ◽  
Treatment Quality ◽  
Special Treatment ◽  
Primary Research ◽  
Nitrogen And Phosphorus ◽  
Quality Indexes

Through the analysis on the data of monitoring water quality of typical reservoirs in Liaoning province, the major reservoirs in the province are in the state of mesotrophication or even eutrophication. The main pollutants are DO-consumption organic pollutants such as ammonia nitrogen and phosphorus. Despite years of special treatment, quality indexes about such nutrients are still high and they severely restrict improvement of the water quality. On the basis of the primary research, this article analyses the main reason for production of phosphorus and nitrogen, estimates the annual load of non point sources pollution and provides a basis for controlling of the pollution.

VETERINARY AND SANITARY EXAMINATION OF THE QUALITY OF TILAPIA FISH GROWN IN PONDS

2021 ◽  
Vol 1 (1) ◽  
pp. 95-101
Keyword(s):  
Hydrogen Sulfide ◽  
Life Cycle ◽  
East Coast ◽  
Ammonia Nitrogen ◽  
State Standards ◽  
The State ◽  
Deep Layers ◽  
Positive Results

The article presents the results of the veterinary and sanitary assessment of the quality of Tilapia fish grown in ponds in the conditions of the naturally hot East coast of the Almaty region. Two groups of fish were studied for different product groups. Sampling and organoleptic studies were carried out in accordance with the state standards in need. The research was carried out in the laboratory «Veterinary Dietetics and veterinary and sanitary examination of life-cycle products» of the Department of «Veterinary and Sanitary Examination and Hygiene» of Kaznayu and the laboratory of «AsylTasEngineering» LLP. During the bacterioscopic examination, the absence of microflora in the deep layers of meat was revealed. The content of amino-ammonia nitrogen in the experimental groups averaged 1.24±0.35 mg, i.e. the amount of amine-ammonia nitrogen was normal. When reacting with peroxidase, the filtrate turned blue-green, which turned brown after 1 minute, i.e., according to the results of the study, the reaction to peroxidase was positive in all groups. When reacting with hydrogen sulfide, all samples of the sample met sanitary standards. When determining the nessler population, it was shown that the filtrate obtained from fish of all groups was transparent, without turbidity and yellowing. During the organoleptic study of all the forms of the Tilapia rehearsal samples, positive results were obtained, i.e., according to the qualitative indicators, all the tests of the ripples met the sanitary requirements.

A New Life for the St. Croix River

1988 ◽  
Vol 23 (4) ◽  
pp. 568-577
Author(s):  
Harold S. Bailey
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Discharge Rate ◽  
Paper Mill ◽  
Regulated River ◽  
Secondary Treatment ◽  
Pulp And Paper Mill ◽  
Oxygen Regime ◽  
Oxygen Concentrations

Abstract The water quality of the upper 110 kilometres of the St. Croix River is considered to be pristine. A major industrial discharge renders the lower 14 kilometres of the river a water quality limited segment. Prior to 1970 the Georgia-Pacific Pulp and Paper Mill at Woodland, Maine, discharged untreated effluent directly into the river causing dissolved oxygen concentrations to drop well below 5 mg/L, the objective chosen in the interest of restoring endemic fish populations. Since 1972, the Mill has installed primary and secondary treatment, regulated river discharge rate and effluent composition which has greatly improved the summer dissolved oxygen regime. By 1980, dissolved oxygen concentrations were generally above 5.0 mg/L and restocking the river with Atlantic Salmon (Salmo salar) was initiated.

scholarly journals Effect of 3-Aminobenzoic Acid Ethyl Ester Methanesulfonate (MS-222) on Quality of Marine Cultured Turbot (Scophthalmus maximus) during Simulated Transport in Water

Fishes ◽  
2021 ◽  
Vol 6 (2) ◽  
pp. 20
Author(s):  
Jie Cao ◽  
Qi Wang ◽  
Jun Mei ◽  
Jing Xie
Keyword(s):  
Dissolved Oxygen ◽  
Ethyl Ester ◽  
Acid Ethyl Ester ◽  
Scophthalmus Maximus ◽  
Ammonia Nitrogen ◽  
Control Group ◽  
Aminobenzoic Acid ◽  
Transport Stress ◽  
Turbot Scophthalmus Maximus

This study evaluated the effect of different concentrations (20, 40 and 60 mg/L) of 3-aminobenzoic acid ethyl ester methanesulfonate (MS-222) on the quality changes in turbot during simulated transport in water. The results showed that the ammonia nitrogen content in the transportation water of each sample increased significantly, and the dissolved oxygen level decreased. The dissolved oxygen content in MS-222-treated samples was higher than that of control group (CK) samples. For turbot flesh quality, simulated transport in water led to a decrease in moisture, fat and protein contents in all samples. The MS-222-treated turbot samples showed higher pH values, glycogen contents, springiness and chewiness values and lower lactic acid contents comparing with the CK samples during simulated transport in water. In addition, the fresh and bitter amino acids in the muscle of turbot increased in each treatment group compared to the non-transported fish at the end of the simulated transport. The results showed that MS-222 treatment could retard the turbot transport stress and improve the quality of turbot during simulated transport in water.

scholarly journals The Relational Fit in Organizational Interventions—What Can Organizational Research Learn from Research in Psychotherapy?

2021 ◽  
Vol 18 (15) ◽  
pp. 8104
Author(s):  
Malene Friis Andersen ◽  
Karina Nielsen ◽  
Jeppe Zielinski Nguyen Ajslev
Keyword(s):  
Well Being ◽  
Positive Outcomes ◽  
Organizational Research ◽  
Organizational Interventions ◽  
Therapist Factors ◽  
Positive Results ◽  
The Way

There is a growing interest in organizational interventions (OI) aiming to increase employees’ well-being. An OI involves changes in the way work is designed, organized, and managed. Studies have shown that an OI’s positive results are increased if there is a good fit between context and intervention and between participant and intervention. In this article, we propose that a third fit—the Relational Fit (R-Fit)—also plays an important role in determining an intervention’s outcome. The R-Fit consists of factors related to 1) the employees participating in the OI, 2) the intervention facilitator, and 3) the quality of the relation between participants and the intervention facilitator. The concept of the R-Fit is inspired by research in psychotherapy documenting that participant factors, therapist factors, and the quality of the relations explain 40% of the effect of an intervention. We call attention to the importance of systematically evaluating and improving the R-Fit in OIs. This is important to enhance the positive outcomes in OIs and thereby increase both the well-being and productivity of employees. We introduce concrete measures that can be used to study and evaluate the R-Fit. This article is the first to combine knowledge from research in psychotherapy with research on OIs.

scholarly journals Access to care and worsening eating disorder symptomatology in youth during the COVID-19 pandemic

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Rebecca Spigel ◽  
Jessica A. Lin ◽  
Carly E. Milliren ◽  
Melissa Freizinger ◽  
Julia A. Vitagliano ◽  
...  
Keyword(s):  
Quality Of Care ◽  
Eating Disorder ◽  
Access To Care ◽  
Treatment Quality ◽  
Related Factors ◽  
Web Based ◽  
Face To Face ◽  
Recovery Study ◽  
And Behaviors

Abstract Background Shelter-in-place orders and social distancing guidelines, in response to the COVID-19 pandemic, have limited traditional face-to-face interactions and led to many clinical providers transitioning to the use of videoconferencing platforms. The present study aims to assess how the COVID-19 pandemic has impacted adolescents’/young adults’ (AYA) eating disorder (ED)-related care, and how access to, changes in, perceived disruptions to, and quality of care are associated with ED thoughts and behaviors. Methods AYA enrolled in the RECOVERY study, a pre-existing web-based longitudinal study, and completed a COVID-19-specific survey (n = 89). We examined bivariate associations of four markers of care: i) access to care, ii) changes in care, iii) perceived disruption to care, and iv) quality of care. Using multiple logistic regression, we examined the associations of pandemic-related markers of care with changes in ED thoughts and behaviors. We excluded those not engaged in treatment pre-pandemic (n = 16). Results In the remaining 73 participants, reported access to care was high, with 92% of respondents continuing care with at least one ED provider during the pandemic; however, 47% stopped some treatment during the pandemic. Nearly one-third (32%) perceived a disruption in treatment. Quality of care remained high with 67% reporting care to be better than or as good as pre-pandemic. Respondents acknowledged heightened symptomatology: 81% reported increased ED thoughts and 81% reported increased ED behaviors due to COVID-19-related factors. However, none of the markers of care described were significantly associated with ED thoughts or behaviors in regression analyses adjusting for demographic variables and baseline characteristics, except our quality of care measure which was approaching significance (p = 0.07). Conclusions Our findings show the majority of AYA who had care prior to the pandemic continued receiving some element of their multi-disciplinary ED treatment and perceived their care as high quality. None of the markers of care described were statistically associated with increased ED thoughts and behaviors.

Water-Quality Assessment of Lv-Tang River in Zhanjiang, China

2013 ◽  
Vol 295-298 ◽  
pp. 755-758 ◽  
Author(s):  
Ya Yun Liu ◽  
Zhi Hong Li ◽  
Xiao Jian Liang ◽  
Yan Peng Lin ◽  
Rong Hao Wu ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Quality Index ◽  
Quality Index ◽  
Oxygen Demand ◽  
Pollution Index ◽  
Ammonia Nitrogen ◽  
Single Parameter ◽  
Water Quality Parameter ◽  
National Quality

Based on the water quality investigation data of December in 2010, the water environment quality of Lv-tang River in Zhanjiang national urban wetland park was assessed using single water quality parameter model and integrated water quality index model. The results show that the water quality of Lv-tang River is worse than the national quality standards for Grade V. The water is polluted seriously. The main pollutants are total nitrogen (TN), ammonia nitrogen (NH3-N) and chemical oxygen demand CODCr with their average concentrations of 60.49 mg/L, 30.57 mg/L and 227.38mg/L, respectively. The averages of their single parameter pollution index are 30.25 , 19.79 and 8.74. The average of single parameter pollution index of the river is 8.23 which indicated that the river belongs to heavy pollution zone. The integrated water quality index was 22.5 showing that the river belongs to serious pollution zone.

scholarly journals Long-term follow-up after active surveillance or curative treatment: quality-of-life outcomes of men with low-risk prostate cancer

2017 ◽  
Vol 26 (6) ◽  
pp. 1635-1645 ◽  
Author(s):  
Lionne D. F. Venderbos ◽  
Shafak Aluwini ◽  
Monique J. Roobol ◽  
Leonard P. Bokhorst ◽  
Eric H. G. M. Oomens ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Prostate Cancer ◽  
Treatment Quality ◽  
Life Outcomes ◽  
Risk Prostate Cancer ◽  
Low Risk Prostate Cancer ◽  
Long Term Follow Up

Quality of service and commitment to tobacco dependence treatment for individuals living with mental disorders in France: A pilot study

2021 ◽  
pp. 002076402110429
Author(s):  
João M Castaldelli-Maia ◽  
Priscila D Gonçalves ◽  
Danielle R Lima ◽  
Helena F Moura ◽  
Gisèle Apter
Keyword(s):  
Mental Health ◽  
Quality Of Service ◽  
Pilot Study ◽  
Mental Disorders ◽  
Mental Health Professionals ◽  
Health Professionals ◽  
Tobacco Dependence ◽  
Treatment Quality ◽  
Tobacco Treatment

Background: There are remarkably high smoking rates in patients living with mental disorders (PLWMD), and the absence of a specific treatment policy for smoking cessation for these patients worldwide. The present study aimed to (i) investigate the quality of service and commitment to tobacco dependence treatment, and (ii) produce high-quality French versions of the Index of Tobacco Treatment Quality (ITTQ) and Tobacco Treatment Commitment Scale (TTCS). Methods: ITTQ and TTCS were used to assess French mental health professionals ( n = 80). Both scales were translated from their original language following standard procedures (i.e. forward translation). Descriptive analysis for total score, each factor and item were calculated for the entire sample, followed by subgroup analysis by gender, and role of the practitioner. Results: Nurses presented higher levels of both treatment commitment and treatment quality in their mental health care units, compared to psychiatrists, and residents. Overall, counseling offering was low and there was a perception that it is unfair to take tobacco away from PLWMD. In the other hand, there were high levels of smoking assessment and perceptions that nicotine dependence should be included in drug treatment programs. Conclusions: There is a gap in tobacco treatment implementation for French PLWMD. The present pilot study alerts about the problem, and should stimulate larger studies validating such measures for wide use with French-speaking mental health professionals. French nurses presented higher levels of both treatment commitment and quality, and could be in a leadership position for such implementation. Encouraging the implementation of tobacco counseling within conventional mental health treatment is critical to improve cessation rates among this population. There is a potential for the sustainability of tobacco treatment interventions since the levels of commitment observed here were higher than in previous studies conducted abroad.

Sign in / Sign up

Export Citation Format

Share Document