The Pilot Study on Domestic Wastewater Treatment by Contact Oxidation Process

2011 ◽  
Vol 347-353 ◽  
pp. 1399-1404
Author(s):  
Jin Hu Yang ◽  
Wei Chen ◽  
Hang Xu ◽  
Lei Zhao
Keyword(s):  
Treatment Cost ◽  
Oxidation Process ◽  
Removal Rate ◽  
Domestic Wastewater ◽  
Impact Loads ◽  
Effluent Quality ◽  
Domestic Wastewater Treatment ◽  
Operation Stability ◽  
The Media ◽  
Contact Oxidation

The airlift contact oxidation process is the combination of airlift technology with contact oxidation method. The process was used to treat domestic wastewater, the appropriate operating parameters were determined by experiment, and the operation stability, anti-impact loads and treatment cost of the process were also analyzed. The results show that this process has some advantages of compact layout, small occupancy area and low treatment cost. Under the conditions of air/water ratio of 16.8 and the hydraulic loading of 4.8m3/(m3•d), the average removal rate of COD and NH3-N reaches 80.1% and 58%, respectively. The effluent quality is stable and excellent, and it can be used as municipal miscellaneous water. The height of the media can be reduced due to its internal recycling system.

Wastewater Treatment over Sand Columns – Treatment Yields, Localisation of the Biomass and Gas Renewal

1993 ◽  
Vol 28 (10) ◽  
pp. 109-116 ◽  
Author(s):  
J. A. Guilloteau ◽  
J. Lesavre ◽  
A. Liénard ◽  
P. Genty
Keyword(s):  
Wastewater Treatment ◽  
Natural Ventilation ◽  
Domestic Wastewater ◽  
Biologically Active ◽  
Effluent Quality ◽  
Domestic Wastewater Treatment ◽  
Gaseous Composition ◽  
Active Substrate ◽  
The Media ◽  
Flooding Period

Domestic wastewater treatment by infiltration-percolation is a process that is becoming common in France. The aim of this study is to find the depth of biologically active substrate in an infiltration basin by determining the depth of the media colonised by the biomass and by studying oxygen renewal mechanisms. The study using sand columns has allowed simultaneous comparison, on the same profile, of biomass content (ATP), gaseous composition (chromatography) and the variations of the effluent quality (carbon, nitrogen, phosphorus). Down to a depth of 30 cm, removal rates achieved in terms of conventional treatment parameters are very high (COD and SS > 90%, NH4+ ≈ 95%, total phosphorus ≈ 50%). Beyond a depth of 15 cm, the biomass content (expressed in ATP) is ten times less than at the surface, and virtually ceases to develop. Monitoring of O2 levels points to the need for drying periods in order to ensure natural ventilation of the basins. The primary settling stage must be effective in order to avoid any risk of clogging which would prevent the air from being renewed by diffusion.The length of the drying period must be almost double that of the flooding period to allow the media to recover as much of its treatment capacity as possible. This study pinpointed the depth of the biologically active substrate at arround 30 cm. The data obtained from this trial project point to the following design criteria: 1.5 m2/p.e. spread over three basins, and a drying period twice as long as the flooding period. The sand depth will depend on the plant's overall water quality objectives: around 0.50 m for the removal of carbonaceous pollution and nitrification of Kjeldahl nitrogen, a greater depth for disinfection purposes.

scholarly journals Identification and Characterization of Janthinobacterium svalbardensis F19, a Novel Low-C/N-Tolerant Denitrifying Bacterium

2019 ◽  
Vol 9 (9) ◽  
pp. 1937 ◽  
Author(s):  
Yinyan Chen ◽  
Peng Jin ◽  
Zhiwen Cui ◽  
Tao Xu ◽  
Ruojin Zhao ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Removal Rate ◽  
Pcr Amplification ◽  
Domestic Wastewater ◽  
Heterotrophic Nitrification ◽  
Aerobic Denitrification ◽  
Nitrite Accumulation ◽  
Specific Pcr ◽  
Domestic Wastewater Treatment ◽  
Initial Ph

Herein, we isolated Janthinobacterium svalbardensis F19 from sludge sediment. Strain F19 can simultaneously execute heterotrophic nitrification and aerobic denitrification under aerobic conditions. The organism exhibited efficient nitrogen removal at a C/N ratio of 2:1, with an average removal rate of 0.88 mg/L/h, without nitrite accumulation. At a C/N ratio of 2, an initial pH of 10.0, a culturing temperature of 25 °C, and sodium acetate as the carbon source, the removal efficiencies of ammonium, nitrate, nitrite, and hydroxylamine were 96.44%, 92.32%, 97.46%, and 96.69%, respectively. The maximum removal rates for domestic wastewater treatment for ammonia and total nitrogen were 98.22% and 92.49%, respectively. Gene-specific PCR amplification further confirmed the presence of napA, hao, and nirS genes, which may contribute to the heterotrophic nitrification and aerobic denitrification capacity of strain F19. These results indicate that this bacterium has potential for efficient nitrogen removal at low C/N ratios from domestic wastewater.

Simultaneous organic stabilization and nitrogen removal in multi-stage biodrum system

2004 ◽  
Vol 50 (6) ◽  
pp. 95-101
Author(s):  
C. Chiemchaisri ◽  
C. Liamsangoun
Keyword(s):  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Rotational Speed ◽  
Removal Rate ◽  
Nitrogen Concentration ◽  
Domestic Wastewater ◽  
Organic Removal ◽  
Multi Stage ◽  
Domestic Wastewater Treatment ◽  
Removal Efficiencies

This paper presents the performance of a multi-stage biodrum system applied to domestic wastewater treatment. The organic stabilization and nitrogen removal efficiency in the system was investigated at different hydraulic retention times (HRT) of 12, 6 and 3 hours. The rotational speed of the biodrum was examined at 2,4 and 8 rpm. Average organic removal efficiencies in the system at different HRTs of 12, 6 and 3 hours were 96.3, 94.4 and 90.9%. Simultaneously, average nitrogen removal efficiencies were 91.5, 90.6 and 81.0%. The effect of rotational speed on nitrogen removal efficiencies in the system was clearly observed at a low HRT of 3 hours. The experimental results suggested that optimum HRT in the system was 6 hours. Moreover, they revealed that nitrogen removal efficiencies in the reactors operated at different rotational speed were in the same degree when considering the effluent nitrogen concentration. However, the reactors operated at lower rotational speed needed to employ higher numbers of biodrums (4 stages) than the others with higher rotational speed (3 and 2 stages at 4 and 8 rpm.) in order to achieve similar effluent qualities. At a rotational speed of 2 rpm, maximum nitrogen removal rate was found to be 0.2 kg/m3/d.

Virus removal by the domestic wastewater treatment system named Johkasou

1997 ◽  
Vol 35 (11-12) ◽  
pp. 187-191 ◽  
Author(s):  
M. Kaneko
Keyword(s):  
Removal Rate ◽  
Treatment Plant ◽  
Order Reduction ◽  
Domestic Wastewater ◽  
Coxsackievirus B3 ◽  
Virus Removal ◽  
E Coli ◽  
Domestic Wastewater Treatment ◽  
Small Model ◽  
Reducing Activity

Virus removal by a treatment plant for domestic wastewater (Johkasou), was investigated using a small model of the plant. Under standard BOD loading of 0.076 BOD kg/m3/day, 97% of E. coli phage T2, 98% of poliovirus 1 and 93% of coxsackievirus B3 were removed from inlet wastewater by the system. About 80% of the viruses in the influent were removed in the first and second anaerobic zones under the standard conditions. When the loading was increased to double the standard loading (0.152 kg BOD/m3/day) the removal rate decreased to 64%. Poliovirus 1 and coxsackievirus B3 were removed more easily than T2 phage. Assuming the stream in each zone was completely mixed, the virus reducing activity of microorganisms was estimated by the rate constant of the first order reduction equation. It was found that the higher the BOD loading rates, the lower the values of the constant.

Performance of a Subsurface Wastewater Infiltration System (SWIS) Using a Novel Biosubstrate

2012 ◽  
Vol 610-613 ◽  
pp. 1770-1773
Author(s):  
Ying Hua Li ◽  
Hai Bo Li ◽  
Xin Wang ◽  
Tie Heng Sun
Keyword(s):  
Wastewater Treatment ◽  
Biological Activity ◽  
Treatment Effect ◽  
Removal Rate ◽  
Domestic Wastewater ◽  
Treatment Technology ◽  
High Biological Activity ◽  
Traditional Technology ◽  
Domestic Wastewater Treatment ◽  
Pollutants Removal

Subsurface wastewater infiltration treatment system (SWIS) is a domestic wastewater treatment technology. While the traditional technology has a large floor area, long starting period and low pollutants removal rate. A new biosubstrate that can be applied in SWIS is studied, experiments about its characteristics were performed, and treatment effect was compared. The results show that the biosubstrate has high biological activity, with it, SWIS has shorter starting period, better pollutants removal rate and consequently needs less floor space.

Design of Experiment Equipment for Treating Low Temperature Domestic Sewage Using Biological Contact Oxidation Process

2011 ◽  
Vol 71-78 ◽  
pp. 4765-4769
Author(s):  
Ying Li ◽  
Jing Zhou
Keyword(s):  
Low Temperature ◽  
High Latitude ◽  
Oxidation Process ◽  
Sewage Treatment ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Oxidation Method ◽  
Treatment Processes ◽  
Contact Oxidation ◽  
Biological Contact Oxidation

According to the biodegradability of wastewater and better adaptability of biological treatment processes, and advantages of using biological contact oxidation process to treat sewage, biological contact oxidation method was used to study the removal conditions of domestic sewage treatment in high latitude area, and a set of experimental device of biological contact oxidation method applied in treating domestic sewage in low temperature was designed, to solve the serious pollution of domestic wastewater and its higher treatment cost in high latitude area.

Implementation of Microbial Fuel Cells (MFCs)-Based Wastewater Treatment

2013 ◽  
Vol 684 ◽  
pp. 230-233 ◽  
Author(s):  
Young Ho Ahn
Keyword(s):  
Wastewater Treatment ◽  
Microbial Fuel Cells ◽  
Treatment Process ◽  
Domestic Wastewater ◽  
High Energy ◽  
Air Cathode ◽  
Effluent Quality ◽  
Domestic Wastewater Treatment ◽  
Secondary Clarifier ◽  
Balance Analysis

This paper provides feasibility estimation for actual domestic wastewater treatment under assumptions of a flow of 10,000 m3/d (about 40,000 capita), when air cathode MFCs configurations were adopted. Temperature-phased (mesophilic-ambient) process configurations in which can achieve either better effluent quality (i.e. maximizing treatment) or high energy recoveries is schematized. The performance used in the mass balance analysis of the treatment process conducted here compared with typical values in conventional biological wastewater treatment. Various advantages of using MFCs for wastewater treatment, including energy saving, less sludge production (and perhaps the lack of a need for a secondary clarifier), and no need for sludge handling, etc., were also addressed.

COD and NH4-N Removal in Two-Stage Batch-Flow Constructed Wetland

2013 ◽  
Vol 448-453 ◽  
pp. 604-607 ◽  
Author(s):  
Hong Jie Sun ◽  
Xin Nan Deng ◽  
Rui Chen
Keyword(s):  
Constructed Wetland ◽  
Removal Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Pilot Scale ◽  
Ammonia Nitrogen ◽  
Two Stage ◽  
Removal Rates ◽  
N Removal ◽  
Domestic Wastewater Treatment

Research was conducted on pilot-scale, two-stage batch-flow constructed wetland systems for domestic wastewater treatment. Synthetic domestic wastewater was treated in a pre-acidification reactor with a hydraulic retention time (HRT) of 3 hours and the average removal rate of chemical oxygen demand (COD) and ammonia-nitrogen (NH4-N) reached 30% and 13.6%, respectively. The first-stage constructed wetland operated with up-flow and batch feed and drain. One cycle was 12h, including 6h feed and 6h drain. With HRT of 3 days, the effluent COD concentrations fluctuated from 32.5 mg/L to 103.4 mg/L, removal rates varied from 60% to 88%; effluent NH4-N concentrations were in the range of 4.8 mg/L to 10.8 mg/L, removal rates varied from 50% to 70%. The second-stage constructed wetland operated with down-flow, which one cycle was 24h, including 12h feed and 12h drain. With HRT of 1 day, effluent COD concentrations varied from 15.7 mg/L to 48.7 mg/L, removal averaged 53.2%; effluent NH4-N concentrations ranged from 0 mg/L to 0.4 mg/L, average removal exceeded 99%. The spatial variation of COD and NH4-N in the first-stage constructed wetland demonstrated that entrainment of air during draining of constructed wetland could strengthen the removal of COD and NH4-N. Temperature had no significant effect on COD degradation while obviously affected the removal of NH4-N.

scholarly journals Lampiran 1G Paper The Use of Pumice Amended with Sand Media for Domestic Wastewater Treatment in Vertical Flow Constructed Wetlands Planted with Lemongrass (Cymbopogon citratus)

2021 ◽  
Author(s):  
Philiphi de Rozari
Keyword(s):  
Organic Matter ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Suspended Solids ◽  
Domestic Wastewater ◽  
Vertical Flow ◽  
X Ray Diffraction ◽  
Cymbopogon Citratus ◽  
Domestic Wastewater Treatment ◽  
The Media

The performance efficiency in constructed wetlands (CWs) technology is primarily affected by the media material and the types of plants used. Recently, investigations into the usage of local materials and plants in CWs has increased. Pumice is a material which is potential used as a media. However, research on amendment of pumice with other media in CWs is still limited. Therefore, this study aims to evaluate the potential of pumice amended with sand media and planted with lemongrass (Cymbopogon citratus) in CWs to remove organic matter, suspended solids, nutrients, and coliform. The adsorbents were characterized using X-ray diffraction, FTIR and XRF followed by adsorption experiments for PO4–P. Furthermore, Six vertical flow (VF) mesocosms with a diameter of 10.2cm and 55cm depth were established over six months. The treatments were based on percentage of sand media amended with pumice and planted with lemongrass. Furthermore, the barren media were applied to investigate the effect of lemongrass. The loading rate of domestic wastewater into the VF mesocosms was 2 L/day while inflows and outflows were determined for nutrients, organic matter, suspended solids and coliform. The adsorption of PO4–P followed the Langmuir model with adsorption capacity was 0.089 and 0.067 mol/g for pumice and sand, respectively. The results also showed that the removal efficiency of TSS, COD, NO3–N, NO2–N, PO4–P and total coliforms were in the range of 93.7–97.3 %, 52–83 %, 63–86 %, 51–74%, 81–88 % and 92–97 %, respectively. Based on the results, the highest removal efficiency was observed in the sand media amended with 50 % pumice and planted with lemongrass, while the lowest was found in the barren sand media.

Domestic wastewater treatment with a small-scale membrane bioreactor

2006 ◽  
Vol 53 (3) ◽  
pp. 69-78 ◽  
Author(s):  
C. Abegglen ◽  
H. Siegrist
Keyword(s):  
Membrane Bioreactor ◽  
Control Strategies ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Phosphate Removal ◽  
Small Scale ◽  
First Year ◽  
Effluent Quality ◽  
Domestic Wastewater Treatment ◽  
And Control

A small-scale membrane plant for treating the domestic wastewater of a four-person household is presented. The membrane bioreactor has been in operation for 6 months and achieves elimination rates of 90, 95 and 80% for total organic carbon, chemical oxygen demand and total nitrogen, respectively. Only a small amount sludge is produced. The permeate is reused for flushing toilets and has a yellowish colour. After investigations of the effluent quality, decolourisation of the permeate, energy efficiency and control strategies in the first year, urine will be treated separately in an automated precipitation reactor where struvite is produced to improve the overall phosphate removal of the plant.

Sign in / Sign up

Export Citation Format

Share Document