Study on SBR Filled with Humus Soil for Domestic Sewage Treatment

2013 ◽  
Vol 295-298 ◽  
pp. 1249-1253
Author(s):  
Ke Zhao ◽  
Jun Yin ◽  
Gang Zhu ◽  
Chang Bing Ye ◽  
Wei Bing Chen
Keyword(s):  
Degradation Rate ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Oxidation Time ◽  
Treatment Efficiency ◽  
Removal Rates ◽  
Organic Matters ◽  
Operation Cost ◽  
Humus Soil

The treatment efficiency of domestic sewage by the SBR filled with humus soil was investigated and compared with that by the conventional SBR. The results show that the removal rates of organic matters, NH4+-N and TP by the SBR filled with humus soil reach 85%, 83% and 72% respectively. Compared with the conventional SBR, the degradation rate of organic matters is improved, and the addition of humus soil contributes to occurrence of SND, thus the removal rate of NH4+-N is increased. The addition of humus soil shortens the oxidation time of organic matters and the nitrification time of NH4+-N, which can improve the treatment efficiency and reduce the operation cost.

Study on the Treatment of Domestic Sewage with Water Quenched Slag Biological Aerated Filter

2011 ◽  
Vol 306-307 ◽  
pp. 1541-1544
Author(s):  
Yan Zhen Yu ◽  
Yan Feng ◽  
Lei Cheng
Keyword(s):  
Blast Furnace ◽  
Removal Rate ◽  
Primary Standard ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Biological Aerated Filter ◽  
Wastewater Discharge ◽  
Treatment Efficiency ◽  
Aerated Filter ◽  
Quality Indexes

The blast furnace water quenched slag has characteristics such as porous and superficial roughness, so it can be modified and cranked out a filter media. The treatment efficiency of domestic sewage with water quenched slag biological aerated filter (BAF) was researched in this paper. And the removal rate of organic compound, ammonium, SS, and chroma was also investigated. The results showed that the quality indexes of the domestic sewage after treatment met the primary standard of the national integrated wastewater discharge standard (GB8978-1996). So the purpose of the waste harnessed by other waste is achieved. The applicative prospect of blast furnace water quenched slag on domestic sewage treatment is very broad.

The Effect of Simulated Domestic Wastewater Treatment by Biofilm and Biological Filter Processing

2013 ◽  
Vol 395-396 ◽  
pp. 1248-1252
Author(s):  
Xiang Wei Sun ◽  
Shan Quan Jiang ◽  
Yun Cheng Xie
Keyword(s):  
Wastewater Treatment ◽  
Lower Energy ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Domestic Wastewater ◽  
Domestic Sewage ◽  
Organic Loading ◽  
Treatment Efficiency ◽  
Biological Filter ◽  
Domestic Wastewater Treatment

Simulative wastewater was treated by a biofilm with soft filling and biological filter processing, the removal rate of COD /TN/NH4+-N and TP were discussed at different C/N ratio. The combined processing of biofilm and biological filter was studied. The results showed that the removal rate of COD is 80%. Biofilm had highly treatment efficiency and biological filter processing needed lower energy at low organic loading. The combined processing showed that the removal rate of COD and NH4+-N is more than 80% and 65% respectively. It will help for further study of domestic sewage treatment.

Mechanisms of High Efficiency and Stabilization of Baffled Constructed Wetland in Treatment of Domestic Sewage

2013 ◽  
Vol 295-298 ◽  
pp. 1057-1061 ◽  
Author(s):  
Chang Bing Ye ◽  
Zhi Ming Zhou ◽  
Ke Zhao ◽  
Qin Liu
Keyword(s):  
Constructed Wetland ◽  
Removal Rate ◽  
Short Circuit ◽  
Domestic Sewage ◽  
Wetland Plants ◽  
Stable Operation ◽  
Removal Rates ◽  
Operational Life ◽  
High Efficient ◽  
Hydraulic Load

To solve the problem of short-circuit of individual current constructed wetland, a baffled constructed wetland was designed and applied to treat domestic sewage by our research group. The wetland plants were composed of Eichhormia crassipes, Oenanthe javanica, Cyperusalternifolius, Phragmites communis and Aquatic. The results of 18 month indicated that the optimal hydraulic load of baffled constructed wetland was 2.0~2.2 m3/(m2•d). At the hydraulic load of 2.0m3/(m2•d), the COD, TN and TP removal rates of baffled constructed wetland could be over 76.40%, 76.12%, 65.37%, respectively, at 24°C. When the temperature decreased to 12°C, the COD, TN, TP removal rates of system decreased to 67.56%、62.75% and 61.33%, respectively; The SS removal rate of the first 6 compartments was about 79.5% and that of system could maintain 87.18% during the operation of system. Based on the results of trial, the mechanisms of extending the baffled constructed wetland's operational life was owed to high efficient SS removal rate of the first 6 compartments which was used as constructed wetland and anaerobic baffled reactor (ABR). As a result, the long-term stable operation of system in treatment of domestic sewage was explained with extending about 5 times service life than that of individual current constructed wetland. The mechanisms of higher efficiency of baffled constructed wetland in treatment of domestic sewage were owed to the longer flow line of system and the up-down flow of domestic sewage makes pollutant more intimate contact with roots of wetland plants.

COD removal efficiency and mechanism of HMBR in high volumetric loading for ship domestic sewage treatment

2016 ◽  
Vol 74 (7) ◽  
pp. 1509-1517 ◽  
Author(s):  
Linan Zhu ◽  
Hailing He ◽  
Chunli Wang
Keyword(s):  
Removal Efficiency ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Oxygen Demand ◽  
Domestic Sewage ◽  
Cod Removal ◽  
Aeration Tank ◽  
Remarkable Effect ◽  
Cod Removal Efficiency ◽  
Volumetric Loading

The hybrid membrane bioreactor (HMBR) has been applied in ship domestic sewage treatment under high volumetric loading for ship space saving. The mechanism and influence factors on the efficiency, including hydraulic retention time (HRT), dissolved oxygen (DO) of chemical oxygen demand (COD) removal were investigated. The HMBR's average COD removal rate was up to 95.13% on volumetric loading of 2.4 kgCOD/(m3•d) and the COD concentration in the effluent was 48.5 mg/L, far below the International Maritime Organization (IMO) discharge standard of 125 mg/L. DO had a more remarkable effect on the COD removal efficiency than HRT. In addition, HMBR revealed an excellent capability of resisting organics loading impact. Within the range of volumetric loading of 0.72 to 4.8 kg COD/(m3•d), the effluent COD concentration satisfied the discharge requirement of IMO. It was found that the organics degradation in the aeration tank followed the first-order reaction, with obtained kinetic parameters of vmax (2.79 d−1) and Ks (395 mg/L). The original finding of this study had shown the effectiveness of HMBR in organic contaminant degradation at high substrate concentration, which can be used as guidance in the full scale of the design, operation and maintenance of ship domestic sewage treatment devices.

An Experimental Study on Compatible Solute Ectoine Dosing of High Salinity Wastewater

2014 ◽  
Vol 955-959 ◽  
pp. 1907-1910
Author(s):  
Su Chen ◽  
Lei Chao ◽  
Ning Chen ◽  
Lin Shan Wang ◽  
Xue Shao ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Waste Treatment ◽  
High Salinity ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Ammonium Nitrogen ◽  
Treatment Efficiency ◽  
Removal Rates ◽  
Cod Removal Rate ◽  
Salinity Wastewater

When the reactor is added with ectoine of concentrations of 0, 0.1, 1 and 10 mmol/L, the impacts on brine waste treatment efficiency are investigated. The results show that the outflow COD and ammonia nitrogen removal rates are the highest, when the ectoine concentration is 0.1 mmol/L. The brine waste treatment efficiency under addition of ectoine of 1 and 10 mmol/L is even worse than that without ectoine addition. It can be preliminarily determined that the best ectoine dosage is in between 0.1-1.0 mmol/L. When ectoine concentrations added in reactors are 0.2, 0.5, 0.8 and 1.0 mmol/L, the results show that the average reactor outflow COD and ammonia nitrogen removal rates are increased compared with those of reactor without adding ectoine. But when ectoine of 1.0 mmol/L is added, the outflow COD and ammonia nitrogen removal rates decrease. When ectoine dosage is 0.5 mmol/L, the reactor outflow COD and ammonia nitrogen values are the lowest, the removal rates are the highest, the average COD removal rate is 74.46%, and the average ammonium nitrogen removal rate is 54.97%. Compared with reactor without adding ectoine, COD and ammonium nitrogen removal rates are increased by 13.16% and 26.81%. Therefore, the best dosage of ectoine is 0.5 mmol/L.

Research on Soil Infiltration Systems for Domestic Sewage Treatment

2012 ◽  
Vol 518-523 ◽  
pp. 1969-1972
Author(s):  
Xiao Fang Yue ◽  
Bo Liu ◽  
Lin Fang ◽  
Chang Kun Liu
Keyword(s):  
Water Quality ◽  
Energy Consumption ◽  
Organic Pollutants ◽  
Removal Rate ◽  
Low Cost ◽  
Sewage Treatment ◽  
Solution Process ◽  
Domestic Sewage ◽  
Soil Infiltration ◽  
Hydraulic Load

In this paper, the performance of the constructed rapid infiltration system ( CRI ) for removal of organic pollutants of domestic sewage was investigated. The results showed that the system had higher efficiency of CODCr removal. The removal rate of CODCr was 86.1% by constructed rapid infiltration system without carbonized sludge , 91.8% with carbonized sludge. The system overcomes the disadvantage of traditional wastewater rapid infiltration land treatment system ( RI ) that the hydraulic load is low, but retains the advantages that the solution process are the low cost, the ease of processing, less energy consumption and good water quality.

scholarly journals Pilot study on the treatment of low carbon and nitrogen ratio municipal sewage by AOAAO sludge-membrane coupling process with multi-point inflow

2021 ◽  
Author(s):  
Dewei Zhang ◽  
Jun-Tian Zheng ◽  
Jun Zheng ◽  
Meng-Ke Zhao ◽  
Meng-Lin Wang ◽  
...  
Keyword(s):  
Distribution Ratio ◽  
Phosphorus Removal ◽  
Removal Rate ◽  
Domestic Sewage ◽  
Low Carbon ◽  
Nitrogen And Phosphorus ◽  
Removal Rates ◽  
Coupling Process ◽  
Carbon And Nitrogen ◽  
Nitrogen Ratio

Abstract A new multi-point inflowA1/O2/A3/A4/O5 sludge-membrane coupling process and pilot plant were developed and designed to solve the problem of nitrogen and phosphorus removal of low C/N domestic sewage in southern China. By changing the distribution ratio of multi-point influent, the removal effect and transformation rule of organic matter, nitrogen and phosphorus in the system were studied. Results showed that when the average low C/N ratio of influent was 2.09 and the influent distribution ratio was 1:1, the average concentrations of COD, NH4+- N, TN and TP in the effluent were 21.31 mg/L, 0.60 mg/L, 12.76 mg/L and 0.34 mg/L, respectively, and the average removal rates are 87.3%, 98.7%, 74.1% and 88.1% respectively. When the low temperature was 12–15℃, the average removal rates were 87.3%, 98.7%, 74.1% and 88.1%, respectively. Compared with the traditional A2O process under the same conditions, the TN removal rate was increased by 15.4%, and the TP removal rate was increased by 22.2%. This system has obvious advantages in treating wastewater with low carbon and nitrogen ratio, which solved the problem that the effluent of biological phosphorus removal from low C/N ratio domestic sewage was difficult to be lower than 0.5 mg/L.

scholarly journals Evaluation of four different coagulants used for chemical dephosphorization of membrane bioreactor effluent

2020 ◽  
Vol 167 ◽  
pp. 01009
Author(s):  
Qin Cai ◽  
Hui-qiang Li ◽  
Ping Yang
Keyword(s):  
Removal Efficiency ◽  
Phosphorus Removal ◽  
Continuous Flow ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Chemical Reactor ◽  
Domestic Sewage ◽  
Internal Loop ◽  
Polyaluminium Chloride

A continuous flow chemical reactor was constructed to study the dephosphorization effect on the effluent of the oxygen-limited internal-loop fluidized membrane bioreactor (IF-MBR) for domestic sewage treatment. Removal effect of total phosphorus (TP) by four coagulants of AlCl3, FeCl3, polyaluminum ferric chloride (PAFC) and polyaluminium chloride (PAC) was evaluated. Results showed that when the ratio of coagulants to TP was 5 (coagulants in terms of Fe and Al), the removal efficiency of TP by FeCl3 was 92.5% and the addition of FeCl3 resulted in an increase in the chromaticity of the effluent. PAC and PAFC had good removal of TP, and the removal percentage achieved 96.2 and 97.4, respectively. However, the flocs they produced were small and light, and the performance in settlement was poor. AlCl3 performed well as a phosphorus removal agent, the removal rate of TP reached 97.4%, and the flocs were large and dense. Based on this, AlCl3 was the best choice for IF-MBR and then the experiment further optimized the Al/P ratio. Results showed that when the Al/P ratio was above 1:1, the effluent TP concentration was lower than 1mg/L; when the ratio was higher than 2.5:1, the effluent TP was lower than 0.5mg/L.

Performance of Treating Domestic Sewage with Coagulation-Ultrafiltration System

2015 ◽  
Vol 737 ◽  
pp. 557-560
Author(s):  
Hui Yuan Zhong ◽  
Guan Yi Liu ◽  
Jun Xia Li ◽  
Hao Wang
Keyword(s):  
High Efficiency ◽  
Removal Rate ◽  
Low Cost ◽  
Sewage Treatment ◽  
Membrane System ◽  
Integrated Treatment ◽  
Domestic Sewage ◽  
Ultrafiltration Membrane ◽  
Cod Removal Rate ◽  
Organic Particles

This study used coagulation - ultrafiltration technology for domestic sewage treatment, which was used widely in water supply and secondary treatment with sewage, in order to achieve high efficiency, low-cost, integrated treatment of domestic sewage treatment. This article chooses fly ash coagulant is not only simple preparation process, low cost, and with the traditional aluminum chloride and ferric chloride coagulation effect. The research results show that the coagulation can make the organic particles size distribution to move to larger particles area and significantly reduce colloidal substance. Ultrafiltration membrane system can further remove the coagulation treatment failed to completely remove polymer and part in the process of low molecular substances, to achieve high organic matter removal efficiency. The backwash of ultrafiltration membrane can make membrane flux recovery by about 80%. This system of SS can remove more than 95%, COD removal rate can reach 60% ~ 70%.

Study on Domestic Sewage Treatment with Rotating Biological Contactor

2012 ◽  
Vol 178-181 ◽  
pp. 376-379
Author(s):  
Fang Li ◽  
Zeng Lu Qi
Keyword(s):  
Removal Efficiency ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Removal Rate ◽  
Sewage Treatment ◽  
Domestic Sewage ◽  
Operating Parameters ◽  
Good Prospect ◽  
Rotating Biological Contactor

This paper adopted a 3-stage rotating biological contactor (RBC), while the operating parameters could be controlled properly, this kind of RBC can obtain better removal effect in domestic sewage treatment. At 25oC, when hydraulic retention time (HRT) is 4h ,6h,8h,10h and 12h ,removal rate of COD is 65.14%,86.10%,89.82%,85.93% and 78.58%.HRT fixes on 8h, removal rate of NH3 –N is 75% after adjusting alkalinity. When rotating rate of RBC is 4,6,8,10,12 and 14 r/min, the removal rate of TN is 53.88%,56.78%,60.03%,58.49%,55.32% and 54.87%.RBC also has a good removal efficiency of TP and obtains the removal rate of TP 45%.There is good prospect in domestic sewage treatment with RBC.

Sign in / Sign up

Export Citation Format

Share Document