Biological treatment of saline domestic wastewater by using a down-flow hanging sponge reactor

Chemosphere ◽  
2021 ◽  
pp. 131101
Author(s):  
Dinh T. Nga ◽  
Nguyen T. Hiep ◽  
Arvind Kumar Mungray ◽  
La Duc Duong ◽  
Phuong Nguyen-Tri ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Domestic Wastewater

A Systems Choice for Wastewater Treatment Systems for Biological Treatment of Domestic Wastewater with Excessive N- and P-Removal

1991 ◽  
Vol 24 (10) ◽  
pp. 231-237
Author(s):  
W. G. Werumeus Buning ◽  
F. W. A. M. Rijnart ◽  
P. P. Weesendorp
Keyword(s):  
Phosphorus Removal ◽  
Biological Treatment ◽  
Domestic Wastewater ◽  
Phosphate Removal ◽  
Oxidation Ditch ◽  
Nitrogen And Phosphorus ◽  
Nitrogen And Phosphorus Removal ◽  
Effluent Standards ◽  
Wastewater Treatment Systems ◽  
P Removal

To meet two levels of nitrogen and phosphorus removal (effluent standards Ntot 20 and 10 mg/l and Ptot 2 and 1 mg/l respectively) various systems were compared in a desk study. After a cost estimate and an assessment f the advantages and drawbacks, the oxidation ditch with biological by pass phosphate removal turned out to be the best system.

scholarly journals AN ANAEROBIC-AEROBIC BIOLOGICAL TREATMENT OF WASTEWATER AT THE LOW-PRODUCTIVITY PLANT

2020 ◽  
pp. 122-131
Author(s):  
L.A. Fesik ◽  
◽  
N.V. Sorokina ◽  
E.А. Geraskina ◽  
T.S. Airapetian ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Local Treatment ◽  
Experimental Studies ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Treated Wastewater ◽  
Trophic Chain ◽  
Biological Purification ◽  
The Law

Abstract. The urgency of the problem of local biological treatment of domestic wastewater from housing in non-canalized areas with improving the quality of treated wastewater to the level of requirements for discharge into fishery bodies of water is considered. The analysis of the state of local wastewater treatment is given. Existing technological schemes and methods of local sewage, which are used for sewage treatment, are considered. The results of theoretical and experimental studies of a complex of a local anaerobic-aerobic biological treatment of domestic wastewater from housing in non-canalized areas at the low-productivity plants are presented. The results of theoretical and experimental researches of complex of local anaerobic-aerobic biological purification of domestic wastewater of habitation in non-canalized areas at the low-productivity plants are given. On the basis of the analysis of work and embodiment of low-productivity plants, used in home and foreign practice of local treatment of domestic wastewater the expediency of application flowing multistage anaerobic-aerobic biological purification of domestic wastewater with use of communities of attached and free-swimming microorganisms is shown. The proposed low-productivity plant, which includes a three-stage aerobic biological treatment of anaerobically treated wastewater is described. The use of ruff fillers for the retention of hydrobionts gives the opportunity to clear salvo discharge, rapid restoration of the activity of the ruff fillers (for example, in power outages). The ruff fillers make it possible to organize an appropriate trophic chain of hydrobionts, which dramatically reduces the amount of excess biomass and the removal of suspensions in treated wastewater. Using the experiments in laboratory conditions and at real industrial treatment plant of a new design there were received parameters of work of stages of anaerobic and aerobic biological purification, the law of nitrification and denitrification processes, the law of specific speed of oxidation of organic pollution in specific conditions of anaerobic-aerobic technology; the opportunity of reception of quality of treated wastewater at the level of the requirements of the specifications for dump of drains in fishing reservoirs is proved.

scholarly journals Analysis of Raw Domestic Wastewater Quality and Evaluation of Biological Treatment Performance in China

2011 ◽  
Vol 47 (2) ◽  
pp. 51-58
Author(s):  
CHUNLIAN XU ◽  
QIANWU SONG ◽  
JIANKUN DAI ◽  
HAIMING HUANG ◽  
RYUHEI INAMORI ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Domestic Wastewater ◽  
Treatment Performance ◽  
Wastewater Quality

scholarly journals A study through batch tests on the analytical determination and the fate and removal of methamphetamine in the biological treatment of domestic wastewater

2018 ◽  
Vol 25 (28) ◽  
pp. 27756-27767 ◽  
Author(s):  
Maria Rosaria Boni ◽  
Agostina Chiavola ◽  
Camilla Di Marcantonio ◽  
Silvia Sbaffoni ◽  
Stefano Biagioli ◽  
...  
Keyword(s):  
Biological Treatment ◽  
Domestic Wastewater ◽  
Analytical Determination ◽  
Batch Tests

A small scale hydroponics wastewater treatment system under Swedish conditions

2004 ◽  
Vol 48 (11-12) ◽  
pp. 161-167 ◽  
Author(s):  
A. Norström ◽  
K. Larsdotter ◽  
L. Gumaelius ◽  
J. la Cour Jansen ◽  
G. Dalhammar
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Phosphorus Removal ◽  
Biological Treatment ◽  
Treatment Plant ◽  
Domestic Wastewater ◽  
Small Scale ◽  
Clean Water ◽  
Surrounding Area ◽  
Sand Filter

A treatment plant using conventional biological treatment combined with hydroponics and microalgae is constructed in a greenhouse in the area of Stockholm, Sweden. The treatment plant is built for research purposes and presently treats 0.559 m3 of domestic wastewater from the surrounding area per day. The system uses anoxic pre-denitrification followed by aerobic tanks for nitrification and plant growth. A microalgal step further reduces phosphorus, and a final sand filter polishes the water. During a three week period in July 2002 the treatment capacity of this system was evaluated with respect to removal of organic matter, phosphorus and nitrogen. 90% COD removal was obtained early in the system. Nitrification and denitrification was well established with total nitrogen reduction of 72%. Phosphorus was removed by 47% in the process. However, higher phosphorus removal values are expected as the microalgal step will be further developed. The results show that acceptable treatment can be achieved using this kind of system. Further optimisation of the system will lead to clean water as well as valuable plants to be harvested from the nutrient rich wastewater.

scholarly journals Biological treatment of drippers clogged by the use of treated domestic wastewater

2016 ◽  
Vol 20 (7) ◽  
pp. 595-599
Author(s):  
Danniely O. Costa ◽  
Rafael O. Batista ◽  
Hudson S. M. Vale ◽  
Amanda B. de Sousa ◽  
Solange A. G. Dombroski ◽  
...  
Keyword(s):  
Flow Rate ◽  
Biological Treatment ◽  
Statistical Difference ◽  
Domestic Wastewater ◽  
Rate Reduction ◽  
Relative Flow Rate ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Different Doses ◽  
Relative Flow

ABSTRACT This study aimed to recover the flow rate of clogged drippers with different doses and permanence times of the product MaxBio. The experiment was conducted in a completely randomized design in split-split-plot scheme, where the plots corresponded to product doses (80, 160, 240 and 320 mg L-1), subplots to the applied treatments (T1 - without biological treatment, T2 - 1st application of the product, and T3 - 2nd application of the product) and in sub-subplots the types of emitters (Plastro Hydrodrip Super, Netafim Tiran and Netafim PCJ-CNJ), with three replicates. The four irrigation units operated with treated domestic wastewater for 400 h in order to clog the emitters. After applying the product MaxBio, the flow rate of the drippers and the relative flow rate reduction were determined to express the unclogging levels. There was significant effect of T2 and T3 on the recovery of the flow rate of the drippers, while for the reduction of relative flow rate, the doses of the product did not show statistical difference regarding the types of drippers.

scholarly journals Overview of Biological Treatment Technologies for Greywater Reuse

2021 ◽  
Vol 5 (3) ◽  
Keyword(s):  
Biological Treatment ◽  
Agricultural Land ◽  
Batch Reactor ◽  
Low Cost ◽  
Domestic Wastewater ◽  
Water Shortage ◽  
Anaerobic Sludge ◽  
Illegal Migration ◽  
Residual Concentration ◽  
Global Water

Greywater is a wastewater discharge originating from kitchen sinks, showers, baths, washing machines and dishwashers. Properly treated greywater can be recycled to meet global water shortages that is expected to affect 2.7 billion people around the world by 2025. Global water shortage can result in a reduction in agricultural land and increased dissertation leading to poverty, faming, war, illegal migration and human trafficking. Greywater contains fewer pathogens than domestic wastewater, is generally safer to handle and easier to treat and reuse onsite for toilet flushing, landscape and crop irrigation. Recycling of grey water provides substantial benefits for both the water supply system by reducing the demand for fresh clean water, and for the wastewater system by reducing the amount of wastewater required to be conveyed and disposed of. In this paper, the existing biological treatment systems for greywater are reviewed. These are: (a) constructed wet land, (b) sequencing batch reactor, (c) vertical flow bioreactor, (d) membrane bioreactor, (e) up-flow anaerobic sludge blanket, (f) rotating biological contractors, (g) trickling filters, (h) aerated lagoons, (i) anaerobic up-flow filter, and (j) expanded bed up-floe reactor. In a biological treatment, the degradation and transformation of greywater constituents are facilitated by the biochemical reactions carried out by microorganisms in the liquid medium. However, the effluent of biologically treated greywater may contain pathogenic microorganisms, requiring a final disinfection step to eliminate the risk of contracting pathogenic diseases. Selection criteria for a disinfectant include: (a) non-toxicity to humans, domesticated animals, and aquatic ecosystems, (b) low cost (c) easy handling, (d) reliable analysis, and (e) a satisfactory residual concentration. Any disinfection process selected (whether chemical oxidants or irradiation treatment is selected) should be evaluated taken into consideration the conditions of the wastewater source and existing biological treatment design.

scholarly journals Zeolite and Activated Carbon Combined with Biological Treatment for Metals Removal from Mixtures of Landfill Leachate and Domestic Wastewater

2015 ◽  
Vol 17 (4) ◽  
pp. 727-737 ◽  
Keyword(s):  
Activated Carbon ◽  
Landfill Leachate ◽  
Biological Treatment ◽  
Domestic Wastewater ◽  
Aeration Rate ◽  
Urban Wastewater ◽  
Metals Removal ◽  
Dependent Variables ◽  
Removal Efficiencies ◽  
Central Composite

<div> <p>Current study was carried out to investigate the heavy metals removal from landfill leachate and urban wastewater by powdered activated carbon and powdered zeolite augmented SBR technique. The research was carried out in six 2000 mL breakers (working size was 1200 ml). The reactors were parted into 2 groups covering 3 for activated carbon augmented SBRs (PAC-SBR), and 3 for powdered zeolite augmented SBRs (PZE-SBR). The response surface methodology (RSM) and the central composite design (CCD) were employed to explain the most advantageous settings of the independent variables (aeration rate<br /> (l min<sup>-1</sup>), reaction time (h), and leachate-to-wastewater mixing ration (%; v/v)) and their resopnses (dependent variables including Fe, Mn, Ni and Cd). The results indicated that the PZE-SBR showed higher performance in removal efficiencies while compared to PAC-SBR. At the optimum conditions of contact time (13.83 h), aeration rate (2.81 l min<sup>-1</sup>) and leachate to domestic wastewater proportion (20.00%) for the PZE-SBR, the removal efficiencies for Fe, Mn, Ni, and Cd were 65.65%, 61.56, 63.41%, and 60.44%, respectively.</p> </div> <p>&nbsp;</p>

Development of Design Criteria for Highly Efficient Biological Treatment of Textile Wastewater

1999 ◽  
Vol 40 (4-5) ◽  
pp. 399-407 ◽  
Author(s):  
H. Kroiss ◽  
H. Müller
Keyword(s):  
Biological Treatment ◽  
Rational Design ◽  
Combined Treatment ◽  
Domestic Wastewater ◽  
Textile Wastewater ◽  
Highly Efficient ◽  
Basic Nitrogen ◽  
Economic Considerations ◽  
Dynamic Simulation Criteria

Mass balances and kinetic parameters for nitrification are essential tools for a rational design of aerobic biological treatment systems. These were determined in lab scale investigations and applied on representative assessment cases for mid- and long-term variations of nitrogen. Thus, with the help of dynamic simulation, criteria for the design of highly efficient biological treatment of textile wastewater were developed, which were also evaluated in economic considerations. Combined treatment of textile and domestic wastewater has shown to be advantageous, because it provides a constant basic nitrogen load. Furthermore, the choice of a sufficiently high sludge age is recommended to reach a reliable treatment system and a simple operation.

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