Developing and Exploring for Treatment Technology of ADU Wastewater Containing High-Concentration Fluorine and Ammonia-Nitrogen

2016 ◽  
Author(s):  
Xingxing Tan ◽  
Ning Zhao
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Ammonia Nitrogen ◽  
Treated Wastewater ◽  
Preparation Process ◽  
Wastewater Discharge ◽  
High Concentration ◽  
Treatment Technology ◽  
Treatment Facilities ◽  
New Treatment

A set of new treatment facilities have been built to deal with the high-concentration of fluorine and ammonia-nitrogen (NH3-N) in wastewater generated from the preparation process of UO2 powder by ADU, whose concentration reaches up to 20g/L and 70g/L, respectively. Compared with various methods and summarized from vast experiences, a three-step technological process has been adopted. Firstly, fluorine is fixed by Ca(OH)2, and the product, CaF2, and other solids are filtered by centrifuge. And the teeny solids in the primary filtrate are precipitated by proper flocculants in pipe chute settling pond. Secondly, the treated wastewater with certain alkalinity is rectified by folded-plate rectifying tower. Meanwhile the ammonia is reused. Finally, adsorbed by specific adsorbent, the fluorine and NH3-N concentration of treated wastewater is further reduced. After numerous experiments and two-year running tests, the process control has been improved. Now, the wastewater treatment capability of the facility can reach 45m3/day. And the concentration of fluorine and NH3-N in the final wastewater is less than 10mg/L and 15mg/L, respectively, which can meet the state wastewater discharge standards. Besides, the concentration of the reused ammonia is raised from 5wt% to 25wt%, and the recovery can reach 99.3%.

Possible impact of treated wastewater discharge on incidence of antibiotic resistant bacteria in river water

2001 ◽  
Vol 43 (2) ◽  
pp. 91-99 ◽  
Author(s):  
T. Iwane ◽  
T. Urase ◽  
K. Yamamoto
Keyword(s):  
Wastewater Treatment ◽  
River Water ◽  
Wastewater Treatment Plant ◽  
Treatment Process ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Resistant Bacteria ◽  
Wastewater Discharge ◽  
Wastewater Treatment Process ◽  
Antibiotic Resistant

Escherichia coli and coliform group bacteria resistant to seven antibiotics were investigated in the Tama River, a typical urbanized river in Tokyo, Japan, and at a wastewater treatment plant located on the river. The percentages of antibiotic resistance in the wastewater effluent were, in most cases, higher than the percentages in the river water, which were observed increasing downstream. Since the possible increase in the percentages in the river was associated with treated wastewater discharges, it was concluded that the river, which is contaminated by treated wastewater with many kinds of pollutants, is also contaminated with antibiotic resistant coliform group bacteria and E.coli. The percentages of resistant bacteria in the wastewater treatment plant were mostly observed decreasing during the treatment process. It was also demonstrated that the percentages of resistance in raw sewage are significantly higher than those in the river water and that the wastewater treatment process investigated in this study works against most of resistant bacteria in sewage.

scholarly journals ANALYSIS OF PHYSICOCHEMICAL WASTEWATER TREATMENT IN ARCTIC ZONES

2020 ◽  
Vol 22 (1) ◽  
pp. 152-163
Author(s):  
E. I. Vialkova ◽  
E. S. Glushchenko ◽  
T. S. Velizhanina ◽  
E. Y. Osipova
Keyword(s):  
Wastewater Treatment ◽  
Biological Treatment ◽  
Wastewater Discharge ◽  
Total Change ◽  
Climatic Zones ◽  
Physicochemical Treatment ◽  
Treatment Facilities ◽  
The Russian Federation ◽  
Sewage Systems ◽  
Design Construction

The large part of the Russian Federation locates in arctic and subarctic climatic zones, which determine the specificity of design, construction and operation of sewage systems of these regions. Nowadays, the most part of small Arctic towns has no wastewater treatment facilities, while the available biological treatment facilities do not work properly. An alternative way is physicochemical treatment, which is more resistant to severe climate and volley wastewater discharge than biological treatment. The paper presents the research results of total change the biological into physicochemical treatment. The main stages of such a treatment include coagulation, filtration, oxidation and two-stage filtration (mechanical and absorption). The experiments show a 90.8% decrease in the concentration of chemical oxygen and a 74% and 82.5% decrease in nitrates and ammonium.

An Instance about Juice Wastewater Treatment with UASB and Bio-Contact Oxidation and Coagulation and Floatation Process

2012 ◽  
Vol 550-553 ◽  
pp. 2108-2111
Author(s):  
Hai Jing Yu ◽  
Hezhang Li
Keyword(s):  
Wastewater Treatment ◽  
Removal Rate ◽  
Wastewater Discharge ◽  
High Concentration ◽  
Contact Oxidation ◽  
Operation Results ◽  
Floatation Process ◽  
Organic Wastewater

Abstract. UASB, bio-contact oxidation, coagulation and floating process was adopted in treatment of juice wastewater. Operation results show that when the main pollutants of COD, BOD and SS in the influent were 6033 mg•L-1, 2512 mg•L-1 and 2200mg•L-1, the effluent could reach 63 mg•L-1, 25 mg•L-1 and 29 mg•L-1, respectively, with the removal rate of 99.0 %, 99.0 %, 98.7 %. The effluent reached the I-class criteria specified in Integrated Wastewater Discharge Standard (GB8978-1996) (COD < 60 mg•L-1, BOD < 20 mg•L-1, SS < 20 mg•L-1). The process provides a practical reference for the similar high concentration organic wastewater treatment processing.

scholarly journals Epidemiological risks of endoparasitoses spread by municipal waste water

2015 ◽  
Vol 52 (3) ◽  
pp. 188-194 ◽  
Author(s):  
A. Dudlová ◽  
P. Juriš ◽  
P. Jarčuška ◽  
L. Čisláková ◽  
I. Papajová ◽  
...  
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Developmental Stages ◽  
Wastewater Sludge ◽  
Indirect Detection ◽  
Treated Wastewater ◽  
High Concentration ◽  
Epidemiological Aspect ◽  
Helminth Eggs

AbstractThe occurrence of developmental stages of endoparasite germs (cysts, oocysts, protozoa, and helminth eggs) as an indirect detection factor of endoparasitoses circulation in the environment, was examined in raw municipal wastewater, sludge and biologically cleaned waste water. Examination of municipal wastewater and sludge from five monitored wastewater treatment plants (WWTPs) in east Slovakia, from various fractions of municipal wastewater, confirmed 35.87 % positivity of samples for the endoparasitic germs. Among of all analysed samples 11.09 % were protozoan oo(cysts) and 20.87 % were helminth eggs. 3.91 % of samples showed positivity to both the helminth eggs and protozoan oo(cysts). In the raw wastewater the protozoa comprised of Giardia spp. (1.08 %) and Entamoeba spp. (1.08 %). The helminth eggs primarily consisted of Ascaris spp. (4.35 %) and strongyle-type eggs (3.26 %). No germs of protozoa or helminths were found in the treated wastewater. However, the highest presence of the germs was found in drained stabilised sludge. The average number of oo(cysts)/kg was 2.86±0.24 and the average number of helminth eggs/kg was 5.77±0.09. In all kinds of sludge, obtained during the process of wastewater treatment, there were protozoan (Giardia spp., Cryptosporidium spp., Entamoeba spp.) and helminths eggs (Ascaris spp., Trichuris spp., Taenia spp., Hymenolepis spp., or strongyle-type eggs) presented. In drained (condensed) stabilised sludge the eggs of Capillaria spp. and Toxocara spp. were also detected. From the epidemiological aspect the sewage sludge, due to high concentration of protozoal oo(cysts) or helminth eggs, represents a significant epidemiological risk for the endoparasitoses dissemination.

Present Status about Wastewater Treatment at Highway Affiliated Facilities of China

2011 ◽  
Vol 356-360 ◽  
pp. 2673-2677 ◽  
Author(s):  
Xin Jun Wang ◽  
Ya Ping Kong ◽  
Ji Ding Chen ◽  
Xue Xin Liu
Keyword(s):  
Wastewater Treatment ◽  
Present Status ◽  
Traffic Volume ◽  
Service Area ◽  
Agricultural Irrigation ◽  
Integrated Process ◽  
Wastewater Discharge ◽  
Treatment Technology ◽  
The Road ◽  
The Future

The present status about wastewater treatment at highway affiliated facilities of China including characteristics of wastewater and treatment technology, the effect of wastewater treatment were investigated. It was found that wastewater quantity was mainly depending on traffic volume entering the service area. Integrated process of wastewater treatment was the main technology used at highway affiliated facilities. 80.4% of the total devices discharge the water which can meet the “Integrated Wastewater Discharge Standard (8978-1996)”. About 69.6% of water was discharged into the road ditches, 22.2% was used for greening and flushing toilet. 3.9% of water evaporated naturally, 2.7% of water was discharged into the river, and only 1.6% was used for agricultural irrigation. The results provided scientific reference for the construction, improvement and management of wastewater treatment device at highway affiliated facilities by relevant departments in the future.

Function of Microorganism and Efficiency on Livestock Wastewater Treatment by Constructed Rapid Infiltration System

2011 ◽  
Vol 233-235 ◽  
pp. 728-732
Author(s):  
Yan Juan Liu ◽  
Ming Zhu ◽  
Ya Wen Yang ◽  
Ai Bin Kang
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Ammonia Nitrogen ◽  
High Concentration ◽  
Livestock Wastewater ◽  
Hydraulic Loading ◽  
Maximum Removal

Taking high concentration livestock wastewater as research object, The results showed that the constructed rapid infiltration system operated at the largest hydraulic loading of 0.26m/d, and during the period of the flooding for ond day and drying for two days, the main efficiency of pollutants occurred in filter height of 0.65m, with the maximum removal efficiency of COD and ammonia nitrogen as 80%; TF and MLVSS also reached maximum.

scholarly journals Advanced Technology Wastewater Treatment of Nitrite Ions

2012 ◽  
Vol 7 (1) ◽  
pp. 54-55
Author(s):  
E.G. Morozov ◽  
V.M. Nikol`skii ◽  
T.V. Saprunova ◽  
A.A. Yakovlev
Keyword(s):  
Wastewater Treatment ◽  
Living Organism ◽  
Advanced Technology ◽  
Nitrogen Fertilizers ◽  
Agricultural Pollution ◽  
High Concentration ◽  
Treatment Technology ◽  
Nitrite Ion ◽  
Improper Use ◽  
Living Organisms

The main reason for high concentration of nitrite ions in water is the existence of sources of industrial and agricultural pollution. Contamination of drinking water, juices, wine and other liquids of nitrite ions as a result of improper use of nitrogen fertilizers has an adverse effect on living organism, because under the influence of enzymes nitrite ions in living organisms form high carcinogenic nitrosamines, and the interaction of nitrite ions from blood hemoglobin causes such toxicity that leads to disease cyanosis [1]. Therefore removal of nitrite ions from water has received increased attention. The paper discusses an innovative wastewater treatment technology from the nitrite ion with hypochlorite produced during electrolysis.

scholarly journals The biomass, survival, reproductive and biomarker responses of Helix pomatia to soil contaminated with treated and untreated wastewater.

2021 ◽  
Author(s):  
Semase Matseleng ◽  
Ozekeke Ogbeide ◽  
Patricks' Otomo Voua
Keyword(s):  
Wastewater Treatment ◽  
Egg Production ◽  
Wastewater Treatment Plants ◽  
Helix Pomatia ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Invertebrate Fauna ◽  
Untreated Wastewater ◽  
Industrial Town ◽  
Treatment Facilities

Abstract Wastewater treatment facilities in developing countries like South Africa are major sources of contaminants via effluent into the environment, which could portend high toxicity risks for non-target flora and fauna. To this end, a study was conducted to determine the ecotoxicological responses of selected organism to treated and untreated wastewater from the wastewater treatment plants in an industrial town. The snail Helix pomatia was exposed to OECD artificial soil spiked with untreated or treated wastewater at the following concentrations: 0, 25, 50, 75, 100%. The ecotoxicological responses of Helix pomatia to wastewater were determined by assessing the biomass, survival, reproduction and biomarker responses (Catalase ‒ CAT and Acetylcholinesterase ‒ AChE activities). The overall results showed significant effects on the survival, reproduction and biomass of H. pomatia. Similar results were observed for juvenile emergence. An EC50 of 5.751% for egg production and an EC50 of 6.233% for juvenile emergence were determined in the untreated wastewater. Such indices could not be computed for the treated wastewater, indicating a decreased in toxicity between the untreated and the treated samples. For both the AChE and CAT activities, there was no statistical difference between treated and untreated wastewater treatments. The results from this study highlight the toxic effects of untreated wastewater and indicate that treated wastewater (effluent) released from the wastewater treatment plant in Phuthaditjhaba remains suitable for invertebrate fauna such as H. pomatia.

scholarly journals DEVELOPMENT OF ORGANIZATIONAL AND TECHNOLOGICAL SOLUTIONS FOR RECONSTRUCTION OF WATER TREATMENT FACILITIES

2021 ◽  
Vol 9 (2) ◽  
pp. 26-30
Author(s):  
Svetlana Chutchenko ◽  
Sergej Evtushenko ◽  
Nikolai Djulai
Keyword(s):  
Water Treatment ◽  
Treatment Technology ◽  
Industrial Buildings ◽  
Facilities Design ◽  
Treatment Facilities ◽  
Design Solutions ◽  
New Treatment

The article continues the cycle of works on the preparation of industrial buildings for reconstruction and their examination. In this article, organizational and technological solutions are systematized, which are mandatory for use in the reconstruction of water treatment facilities. Design solutions for the reconstruction of treatment facilities are based on a new treatment technology.

Application of Process on Furfural Wastewater Treatment

2014 ◽  
Vol 1073-1076 ◽  
pp. 885-888
Author(s):  
Ya Rong Dong ◽  
Li Dong Wang
Keyword(s):  
Wastewater Treatment ◽  
High Efficiency ◽  
Ph Value ◽  
Impact Load ◽  
Stable Operation ◽  
Wastewater Discharge ◽  
High Concentration ◽  
Bacterial Oxidation ◽  
Contact Oxidation ◽  
Biological Contact Oxidation

The furfural wastewater is kind of highly concentrated organic wastewater. According to its quality and quantity characteristics, this process of micro-electrolysis - photosynthetic bacterial oxidation - biological contact oxidation - biological carbon has been used for treating furfural wastewater. Under the condition that, the mass concentration of influent COD, BOD5 and SS were 8337~15692, 2100~4030, 100~300mg/L respectively, the pH value was 2~3, the effluent water after the treatment met the specification for grade 1 in Integrated Wastewater Discharge Standard GB(8978-1996), which practical proved that, the effect of the treatment process had a high efficiency, impact load is strong and stable operation; using it in furfural wastewater treatment, other high concentration wastewater treatment would be application reference.

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