Ammonium nitrogen removal in batch cultures treating digested piggery wastewater with microalgae Oedogonium sp.

2013 ◽  
Vol 68 (2) ◽  
pp. 269-275 ◽  
Author(s):  
Haiping Wang ◽  
Zhiquan Hu ◽  
Bo Xiao ◽  
Qunpeng Cheng ◽  
Fanghua Li
Keyword(s):  
Removal Efficiency ◽  
Nutrient Removal ◽  
Scenedesmus Obliquus ◽  
Ammonium Nitrogen ◽  
High Concentration ◽  
Piggery Wastewater ◽  
Batch Tests ◽  
N Removal ◽  
Performance Reduction ◽  
Digested Piggery Wastewater

Due to the nutrient characteristics of the high concentration of available ammonium in digested piggery wastewater (DPW), microalgae can be used to treat DPW before its final discharge. Four green microalgae (Hydrodictyaceae reticulatum Lag, Scenedesmus obliquus, Oedogonium sp. and Chlorella pyrenoidosa) and three blue-green algae (Anabaena flos-aquae, Oscillatoria amoena Gom and Spirulina platensis) were used to remove the nutrients (N, P, C), especially ammonium nitrogen (NH4+-N), from diluted DPW with 300 mg/L algae density in batch tests. The microalgae with the best NH4+-N nutrient removal was then selected for further optimization of the variables to improve NH4+-N removal efficiency using a central composite design (CCD) experiment. Taking into account the nutrient removal efficiency, Oedogonium sp. showed the best performance (reduction of 95.9% NH4+-N, 92.9% total phosphorus (TP) and 62.5% chemical oxygen demand (COD)) based on the results of the batch tests. The CCD results suggested that the optimal values of variables were initial Oedogonium sp. density of 399.2 mg/L and DPW diluted by 16.3, while the predicted value of NH4+-N removal efficiency obtained was 97.0%.

The Removal Efficiency of SBR on High Concentration Ammonium Nitrogen Wastewater

2016 ◽  
Author(s):  
Yuan Ren ◽  
Yu Liu ◽  
Run-Qing Yang ◽  
Yan-Ran Zhao ◽  
Ru-Ya Chen ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Ammonium Nitrogen ◽  
High Concentration

Influence of important operational parameters on performance of a membrane biological reactor

2000 ◽  
Vol 41 (10-11) ◽  
pp. 235-242 ◽  
Author(s):  
S-H. Yoon ◽  
H-S. Kim ◽  
J-K. Park ◽  
H. Kim ◽  
J-Y. Sung
Keyword(s):  
Removal Efficiency ◽  
Feeding Rate ◽  
Peristaltic Pump ◽  
Operational Parameters ◽  
High Concentration ◽  
Entire Process ◽  
Bench Scale ◽  
N Removal ◽  
Series Of Experiments ◽  
Bod Removal

In order to elucidate optimum operational parameters, five series of experiments with bench scale “A/O and MBR (membrane biological reactor)” devices were carried out. The HRTs of each anoxic and oxic bioreactor were maintained for 2˜6 h and for 3˜6 h, respectively. The internal recycle ratios were also changed from 100% to 300% of the influent feeding rate by peristaltic pump. There were no recognizable differences in the values of BOD removal efficiency, being around 99%, in the series of experiments. The same was true for T–N removal efficiency, which ranged about 60%. The similarity of the serial experiments for each parameter indicates that the extraordinarily high concentration of microorganisms in the bioreactor, i.e. 10,000–15,000 mg/l, strongly controls the entire process regardless of any moderate changes of the operational parameters.

Study on Treatment of Ammonium Nitrogen in Desulfurization and Denitrification Wastewater with Sodium Hypochlorite

2013 ◽  
Vol 864-867 ◽  
pp. 438-441
Author(s):  
Zhen Zhou ◽  
Da Long Hu ◽  
Chu Qiao Zhang ◽  
Xue Lian Shen ◽  
Chun Hua Wu ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Sodium Hypochlorite ◽  
Ph Value ◽  
Ammonium Nitrogen ◽  
Molar Ratio ◽  
Distillation Method ◽  
Good Reliability ◽  
Initial Concentration ◽  
N Removal ◽  
Effects Of Ph

Based on the investigation of measurement method of ammonium nitrogen (NH4-N) desulfurization and denitrification wastewater (DDW) by distillation method, effects of pH, Cl/N and the initial concentration of NH4-N on the removal of NH4-N in DDW by sodium hypochlorite were studied. Results of parallel test and standard recovery test demonstrated good reliability and accuracy of the distillation method for the measurement of NH4-N in DDW. The NH4-N removal efficiency increased with pH from 5.0 and 8.0, and then decreased with pH higher than 8.0. Therefore, the optimum pH value was 8.0 with NH4-N removal efficiency of 74.7%. NH4-N removal efficiency was increased from 16.9% to 84.1% with Cl/N molar ratio rose from 1 to 5. The initial concentration of NH4-N showed insignificant effect on the removal amount of NH4-N, and the removed NH4-N was about 12~13mg/L with the addition of 4.86mmol/L sodium hypochlorite.

Evaluation of Sequencing Batch Biofilm Reactor for Biological Nutrient Removal from Simulated Domestic Wastewater

2012 ◽  
Vol 209-211 ◽  
pp. 2049-2052
Author(s):  
Chang Hang Wu ◽  
Wei Jun Zhang
Keyword(s):  
Removal Efficiency ◽  
Nutrient Removal ◽  
Domestic Wastewater ◽  
Biofilm Reactor ◽  
Biological Nutrient Removal ◽  
Sequencing Batch Biofilm Reactor ◽  
N Removal ◽  
Nitrification Process ◽  
Nitrification And Denitrification ◽  
Denitrification Process

A lab-scale sequencing batch biofilm reactor (SBBR) was developed to treat domestic wastewater. After one year’s operation, the results were obtained as follows: when the reaction carried out in 3 h, COD removal efficiency approached or reached the maximal value, up to 90%. The nitrification process of NH3-N needed 4 h, and NH3-N removal efficiency reached the maximal value. Moreover, according to the variation of TN , NO3--N and NO2--N concentration in the nitrification and denitrification process, when NH3-N degraded to zero or the minimal value, just two cycles ending, it means that the SBBR system completed the nitrification and denitrification process.

scholarly journals A novel growth method for diatom algae in aquaculture waste water for natural food development and nutrient removal

2017 ◽  
Vol 75 (12) ◽  
pp. 2777-2783 ◽  
Author(s):  
Xiao-li Li ◽  
Thomas Kiran Marella ◽  
Ling Tao ◽  
Liang Peng ◽  
Chao-feng Song ◽  
...  
Keyword(s):  
Waste Water ◽  
Removal Efficiency ◽  
Nutrient Removal ◽  
Phosphate Removal ◽  
Control Group ◽  
Natural Food ◽  
Diatom Algae ◽  
Factors Influencing ◽  
N Removal ◽  
Aquaculture Waste

Diatom algae are known to play an important role as primary producers in many diverse ecosystems, including artificial aquaculture ponds where they also aid in maintaining water quality by consuming excess nutrients. But factors influencing their growth are still poorly understood. In the present study the effect of micronutrients, N:P ratio and silica concentration on benthic diatom Synedra sp. grown in fish pond waste water was studied along with nutrient removal efficiency. We have studied nine different treatments, of which addition of micronutrient mixture Nualgi along with adjusted N:P to 6:1 resulted in highest cell density, followed by silicate enrichment, whereas only N:P adjustment and Nualgi addition had no significant effect on diatom growth. At the end of the growth experiment, the N removal efficiencies of treatment groups (50.23%–65.44%) were significantly higher (P < 0.05) than that of the control group (43.56%), whereas phosphate removal efficiency was significantly higher (P < 0.05) with Nualgi and N:P adjustment (53.37%–68.98%). The silicate consumption was significantly higher in the control group, at 63.87%, than in other experimental groups. These results will give us a new insight into important factors influencing beneficial algae growth and simultaneous nutrient removal from aquaculture waste water.

Effectiveness Research of UASB Treatment Piggery Wastewater

2011 ◽  
Vol 183-185 ◽  
pp. 188-192
Author(s):  
Li Long Yan ◽  
Ying Zhang ◽  
Chuan Ju Li ◽  
Xue Han
Keyword(s):  
Removal Rate ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Swine Wastewater ◽  
Anaerobic Sludge ◽  
High Concentration ◽  
Piggery Wastewater ◽  
Efficient Treatment ◽  
Pig Farm ◽  
Anoxic Environment

In order to efficient treatment swine wastewater of chemical oxygen demand(COD) of high concentration, ammonium nitrogen (NH4+-N) of high concentration and high suspended solids (SS) , Up-flow Anaerobic Sludge Bed (UASB) were fed with piggery wastewater and investigated removal effect of COD, SS, NH4+-N, TP. The results showed that, UASB can effectively remove COD and SS in the pig farm wastewater. The corresponding removal rate was respectively 82.36% and 70%. UASB was poor on removal effect of NH4+-N and total phosphate (TP), due to the lack of anaerobic, anoxic environment. UASB is able to treatment COD and SS of piggery wastewater, but TN and TP removal efficiency need to further study.

Cultivation of an Arthrospira platensis with digested piggery wastewater

2015 ◽  
Vol 72 (10) ◽  
pp. 1774-1779 ◽  
Author(s):  
Rui Liu ◽  
Qingqing Guo ◽  
Wei Zheng ◽  
Lüjun Chen ◽  
Jinfei Luo
Keyword(s):  
Protein Content ◽  
Crude Protein ◽  
Biomass Yield ◽  
Nitrate Nitrogen ◽  
Animal Feed ◽  
Continuous Cultivation ◽  
Arthrospira Platensis ◽  
Ammonium Nitrogen ◽  
Piggery Wastewater ◽  
Digested Piggery Wastewater

An Arthrospira platensis strain ZJWST-S1 was isolated in Jiaxing City, China, which proved able to proliferate quickly in undiluted digested piggery wastewater (DPW), and the protein content in the algal biomass was high. Single factor experiments showed that the strain was able to quickly grow in a Zarrouk medium as the dosage of sodium bicarbonate, nitrate-nitrogen and phosphate-phosphorus was not less than 4.0 mg·L–1, 40 mg·L–1 and 10 mg·L–1, respectively. No growth inhibition was observed when the culturing medium contained nitrite nitrogen of 0–120 mg·L–1 and ammonium nitrogen of below 20 mg·L–1. Five runs of semi-continuous cultivation with DPW as the culturing medium in a 250 L raceway pond showed that the biomass yield in a 9-day semi-continuous culturing was up to 45.2–64.7 g·m–2·d–1, higher than the yields obtained by other researchers, and the crude protein content in biomass was over 50%, meeting the national animal feed grade standard. Total nitrogen (TN) and total phosphorus (TP) were removed from DPW at a rate of 10.9–14.0 mg·L–1·d–1 and 1.3–1.8 mg·L–1·d–1, respectively. The mass balance revealed that 80–93% of TN and 84–98% of TP reduced from DPW were converted to A. platensis biomass.

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