The Operation Time Influence on the Sauce Wastewater Treatment

2011 ◽  
Vol 183-185 ◽  
pp. 278-281
Author(s):  
Zhi Xiao Liu ◽  
Jin Long Zuo
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Food Industry ◽  
Rapid Development ◽  
Water Environment ◽  
Operation Time ◽  
Ammonia Nitrogen ◽  
Aeration Time

With rapid development of food industry, the production of soybean sauce is increasing in recent years. The sauce wastewater is doing greater and greater harm to the water environment. In order to tackle this problem, the operation time on the sauce wastewater treatment were investigated. The results showed that the process has a better effect for ammonia nitrogen, the orthophosphate and COD removal. The effluent ammonia nitrogen was less than 5mg/L and the ammonia nitrogen removal efficiency could reach about 90% with the aeration time 2 h-3.5 h. The orthophosphate increased during the anoxic stage while decreased during the aerobic stage. At the end of the aerobic stage, the orthophosphate concentration and the COD could reach about 1mg/L and 21 mg/L respectively when aeration time was 2 h-3.5 h. The better operation time (the aeration time) was at 2 h-3.5 h and the system could get a good water quality for sauce wastewater treatment.

The Temperature Influence on the Sauce Wastewater Treatment

2011 ◽  
Vol 183-185 ◽  
pp. 1114-1117
Author(s):  
Jin Long Zuo ◽  
Zhi Wei Zhao
Keyword(s):  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Treatment Effect ◽  
Removal Rate ◽  
Water Environment ◽  
Ammonia Nitrogen ◽  
Temperature Influence ◽  
Aeration Time

Nowadays the sauce wastewater is doing greater harm to the water environment in China. In order to tackle this problem, the temperature influence on the sauce wastewater treatment effect was investigated. The results showed that when the temperature is 22～32°C the ammonia nitrogen removal effect was good and the ammonia nitrogen removal rate could reach more than 90%. The temperature had no obvious influence on nitrate for sauce wastewater. When the temperature is 22～32°C, the effluent orthophosphate concentration could reach about 1mg/L and the removal efficiency could reach about 70% with aeration time 2.5 h. Thus the sauce wastewater removal effect could be influenced by the temperature.

The Nitrogen Variation of Sauce Wastewater with Different Influent COD Concentration

2011 ◽  
Vol 183-185 ◽  
pp. 255-258
Author(s):  
Jin Long Zuo
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Rapid Development ◽  
Water Environment ◽  
Ammonia Nitrogen ◽  
Nitrate And Nitrite ◽  
Variation Tendency

With rapid development of sauce industry, the production of the sauce is increasing in recent years. The sauce wastewater is doing greater harm to the water environment in China. In order to tackle this problem, the influent COD concentration influence on nitrogen variation of sauce wastewater was investigated. The results showed that the influent COD has a different effect for ammonia nitrogen, nitrite and nitrate. When the influent COD concentration was 600mg/L, 500mg and 300mg/L respectively, the effluent ammonia nitrogen was at 4.3mg/L, 1.8mg/L and 1.0mg/L. And the ammonia nitrogen removal efficiency was more than 90%. Meanwhile the nitrate and nitrite accumulated steadily with the same variation tendency.

The nitrogen removal potential of predenitrification systems in sensitive coastal areas

1995 ◽  
Vol 32 (7) ◽  
pp. 135-142
Author(s):  
E. Görgün ◽  
N. Artan ◽  
D. Orhon ◽  
R. Tasli
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Nitrogen Removal ◽  
Retention Time ◽  
Treatment Process ◽  
Hydraulic Retention Time ◽  
Domestic Sewage ◽  
Coastal Areas ◽  
Careful Evaluation ◽  
Denitrification Kinetics

Effective nitrogen removal is now required to protect water quality in sensitive coastal areas. This involves a much more difficult treatment process than for conventional domestic sewage as wastewater quantity and quality exhibits severe fluctuations in touristic zones. Activated sludge is currently the most widely used wastewater treatment and may be upgraded as a predenitrification system for nitrogen removal. Interpretation of nitrification and denitrification kinetics reveal a number of useful correlations between significant parameters such as sludge age, C/N ratio, hydraulic retention time, total influent COD. Nitrogen removal potential of predenitrification may be optimized by careful evaluation of wastewater character and the kinetic correlations.

Enhancing nitrogen removal efficiency in a dyestuff wastewater treatment plant with the IFFAS process: the pilot-scale and full-scale studies

2017 ◽  
Vol 77 (1) ◽  
pp. 70-78 ◽  
Author(s):  
Yanjun Mao ◽  
Xie Quan ◽  
Huimin Zhao ◽  
Yaobin Zhang ◽  
Shuo Chen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Pilot Scale ◽  
Full Scale ◽  
Nitrification And Denitrification ◽  
Dyestuff Wastewater

Abstract The activated sludge (AS) process is widely applied in dyestuff wastewater treatment plants (WWTPs); however, the nitrogen removal efficiency is relatively low and the effluent does not meet the indirect discharge standards before being discharged into the industrial park's WWTP. Hence it is necessary to upgrade the WWTP with more advanced technologies. Moving bed biofilm processes with suspended carriers in an aerobic tank are promising methods due to enhanced nitrification and denitrification. Herein, a pilot-scale integrated free-floating biofilm and activated sludge (IFFAS) process was employed to investigate the feasibility of enhancing nitrogen removal efficiency at different hydraulic retention times (HRTs). The results showed that the effluent chemical oxygen demand (COD), ammonium nitrate (NH4+-N) and total nitrogen (TN) concentrations of the IFFAS process were significantly lower than those of the AS process, and could meet the indirect discharge standards. PCR-DGGE and FISH results indicated that more nitrifiers and denitrifiers co-existed in the IFFAS system, promoting simultaneous nitrification and denitrification. Based on the pilot results, the IFFAS process was used to upgrade the full-scale AS process, and the effluent COD, NH4+-N and TN of the IFFAS process were 91–291 mg/L, 10.6–28.7 mg/L and 18.9–48.6 mg/L, stably meeting the indirect discharge standards and demonstrating the advantages of IFFAS in dyestuff wastewater treatment.

Study on De-Nitrification of Improved Step-Feed Progress

2014 ◽  
Vol 703 ◽  
pp. 171-174
Author(s):  
Bing Wang ◽  
Yi Xiao ◽  
Shou Hui Tong ◽  
Lan Fang ◽  
Da Hai You ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Operating Conditions ◽  
Removal Mechanism ◽  
Aerobic Zone

Improved step-feed de-nitrification progress combined with biological fluidized bed was introduced in this study. The progress had good performance and capacity of de-nitrification and organic matter. The experiment result showed that the de-nitrification efficiency of the improved biological fluidized bed with step-feed process was higher than the fluidized bed A/O process under the same water quality and the operating conditions. When the influent proportion of each segment was equal, the system showed good nitrogen removal efficiency with the change of influent C/N ratio, HRT and sludge return ratio. The removal rate of TN reached up to 88.2%. It showed that the simultaneous nitrification and de-nitrification phenomenon happened in the aerobic zone. The nitrogen removal mechanism was also studied.

scholarly journals Research on Water Environment Regulation of Artificial Playground Lake Interconnected Yangtze River

2018 ◽  
Vol 15 (10) ◽  
pp. 2110 ◽  
Author(s):  
Weiwei Song ◽  
Xingqian Fu ◽  
Yong Pang ◽  
Dahao Song ◽  
Qing Xu ◽  
...  
Keyword(s):  
Water Quality ◽  
Water Level ◽  
Yangtze River ◽  
Flood Control ◽  
Numerical Models ◽  
Rapid Development ◽  
Control Level ◽  
Water Environment ◽  
Water Diversion ◽  
Coupled Models

With the rapid development of China, water pollution is still a serious problem despite implementation of control measures. Reasonable water environment management measures are very important for improving water quality and controlling eutrophication. In this study, the coupled models of hydrodynamics, water quality, and eutrophication were used to predict artificial Playground Lake water quality in the Zhenjiang, China. Recommended “unilateral” and “bilateral” river numerical models were constructed to simulate the water quality in the Playground Lake without or with water diversion by pump, sluice and push pump. Under “unilateral” and “bilateral” river layouts, total nitrogen and total phosphorus meet the landscape water requirement through water diversion. Tourist season in spring and summer and its suitable temperature result in heavier eutrophication, while winter is lighter. Under pumping condition, water quality and eutrophication of “unilateral” river is better than “bilateral” rivers. Under sluice diversion, the central landscape lake of “unilateral river” is not smooth, and water quality and eutrophication is inferior to the “bilateral”. When the water level exceeds the flood control level (4.1 m), priority 1 is launched to discharge water from the Playground Lake. During operation of playground, when water level is less than the minimum level (3.3 m), priority 2 is turned on for pumping diversion or sluice diversion to Playground Lake. After opening the Yangtze river diversion channel sluice, priority 3 is launched for sluice diversion to the Playground Lake. When the temperature is less than 15 °C, from 15 °C to 25 °C and higher than 25 °C, the water quality can be maintained for 15 days, 10 days and 7 days, respectively. Corresponding to the conditions of different priority levels, reasonable choices of scheduling measures under different conditions to improve the water quality and control eutrophication of the Playground Lake. This article is relevant for the environmental management of the artificial Playground Lake, and similar lakes elsewhere.

Combined organic carbon and complete nitrogen removal using anaerobic and aerobic upflow filters

1994 ◽  
Vol 30 (12) ◽  
pp. 297-306 ◽  
Author(s):  
Joseph Akunna ◽  
Claude Bizeau ◽  
René Moletta ◽  
Nicolas Bernet ◽  
Alain Héduit
Keyword(s):  
Organic Carbon ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Nitrogen Loss ◽  
Ammonia Nitrogen ◽  
Cod Removal ◽  
Cod Removal Efficiency ◽  
Treated Effluent ◽  
Treated Effluents ◽  
Aerobic And Anaerobic

Two laboratory upflow aerobic and anaerobic filters fed with synthetic wastewaters were used to study firstly the effects of aeration rate on the nitrification of anaerobically pre-treated effluents and secondly the effects of recycle-to-influent ratios on methane production rate, denitrification and nitrification performances of a combined aerobic and anaerobic wastewater treatment process. Nitrification of anaerobically pre-treated effluent was accompanied by aerobic post-treatment for residual COD removal. A comparison of nitrification performances using autotrophic medium and anaerobically pre-treated effluents (containing 1203 mg COD 1−1) with the same ammonia nitrogen concentration of about 300 mg NH4-N 1−1 showed that 3% of added ammonia nitrogen was assimilated by autotrophic nitrifiers during nitrification of the autotrophic medium while up to 30% was assimilated by both nitrifiers and heterotrophs during organic carbon removal and nitrification of anaerobically pre-treated effluent. Furthermore, it was suspected that significant nitrogen loss through denitrification occured in the aerobic filter especially at low aeration rates. In the study of the combined aerobic-anaerobic system, maximum ammonia nitrogen removal of 70% through denitrification was obtained at recycle-to-influent ratios of 4 and 5. COD removal efficiency in the anaerobic filter decreased from 77 to 60% for recycle-to-influent ratios of zero to 5. Overall COD removal efficiency of the entire system was constant at about 99% due to heterotrophic COD removal in the aerobic filter.

Experiment and Practice on the Wastewater Treatment in Tunnel Construction Processing

2013 ◽  
Vol 664 ◽  
pp. 13-18
Author(s):  
Rong Gui Fan ◽  
Hui Chuan Wang ◽  
Xian Li
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Removal Efficiency ◽  
Preliminary Test ◽  
Treatment Method ◽  
Suspended Solid ◽  
Tunnel Construction ◽  
Rotational Flow ◽  
Wastewater Discharge ◽  
Sedimentation Tank

The concentration of suspended solid (SS) was confirmed as the main pollutants in wastewater from the tunnel construction processing through wastewater source and water quality in the tunnel construction processing being analyzed. The rapid wastewater treatment device was designed which combined with rotational flow sedimentation tank and flocculation reaction pool that the cement was used as flocculants. The results showed at the preliminary test that the removal efficiency of SS was above 94%. The effluent can meet the wastewater discharge standard. It was the fact that the treatment method was fast and convenient processing.

Development of Air Supply Control Technology in Sidestream MLE Process by Measuring Conductivity

2020 ◽  
Vol 42 (3) ◽  
pp. 97-109
Author(s):  
Shinyo Chang ◽  
Pung Shik Shin ◽  
Yeon-Koo Jeong ◽  
Young June Choi
Keyword(s):  
Water Quality ◽  
Removal Efficiency ◽  
Biological Treatment ◽  
Inorganic Nitrogen ◽  
Ammonia Nitrogen ◽  
Control Technology ◽  
Treatment Efficiency ◽  
Air Supply ◽  
Total Inorganic Nitrogen ◽  
Nitrogen Treatment

Objectives : This study aimed to achieve improved process performance and energy saving by developing a technology to control the air supply of an aerobic basin by measuring the conductivity in the anoxic basin.Methods : To verify whether conductivity can be used as an operation indicator of biological treatment, the correlation analysis between water quality factor and conductivity of each process was conducted by dividing into summer (methanol input), winter and autumn periods. An empirical formula was presented by briefly arranging the required air quantity formula, and a quick reference was prepared by putting air supply in the conductivity range sequentially. The performance evaluation was judged based on the removal efficiency of ammonia nitrogen and total inorganic nitrogen, SNR and SDNR, the change of air supply, the stability of the process against inflow change.Results and Discussion : The seasonal correlation coefficients of conductivity and water quality items were calculated in the order of ammonia nitrogen, total inorganic nitrogen, DOC, and phosphate in the range of 0.5267 ~ 0.9115. It was found that the conductivity could be used as an operation indicator of the biological treatment process with a correlation coefficient of 0.5 or more. The regression equations for the conductivity and ammonia nitrogen are secured by season, so it is possible to estimate the ammonia nitrogen through the conductivity. At the end of the aerobic basin DO was 3.4 mg/L, the nitrogen treatment efficiency in winter was the best. The aerobic basin DO can be controlled by the air supply, and it can be seen that it is possible to control the air supply and improve the nitrogen treatment efficiency by directly measuring the conductivity having a high correlation with nitrogen. An empirical formula for estimating the required air volume through conductivity and inflow is presented. A' and (B' + X') are 0.0589 (m<sup>3</sup>-air/h)/(m<sup>3</sup>/h)/(μS/cm) and –77.562 (m<sup>3</sup>-air/h)/(m<sup>3</sup>/h). The result of automatic control of air supply according to the measured conductivity of anoxic tank during winter season showed that total inorganic nitrogen removal efficiency and SDNR were 8.3% and 0.007 g-N/g-MLSS/d higher than the actual plant conditions, respectively. During the automatic control period, the air supply/inflow average ratio was 36 (m<sup>3</sup>-air/h)/(m<sup>3</sup>/h), which could reduce the air supply by 21.7% compared to the actual plant conditions.Conclusions : The air supply can be estimated from the flow rate and conductivity. The air supply control technology of the conductivity-based MLE process will be able to simultaneously improve nitrogen removal efficiency and reduce energy consumption.

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