scholarly journals Development of a Short-Cut Combined Magnetic Coagulation–Sequence Batch Membrane Bioreactor for Swine Wastewater Treatment

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 83
Author(s):  
Yanlin Chen ◽  
Qianwen Sui ◽  
Dawei Yu ◽  
Libing Zheng ◽  
Meixue Chen ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
High Throughput Sequencing ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Aluminium Chloride ◽  
Swine Wastewater ◽  
Ammonia Oxidizing Bacteria ◽  
Sequencing Analysis ◽  
High Concentration ◽  
Pre Treatment

A high concentration of suspended solids (SS) in swine wastewater reduces the efficiency of the biological treatment process. The current study developed a short-cut combined magnetic coagulation (MC)–sequence batch membrane bioreactor (SMBR) process to treat swine wastewater. Compared with the single SMBR process, the combined process successfully achieved similarly high removal efficiencies of chemical oxygen demand (COD), total nitrogen (TN), ammonium nitrogen (NH4+-N), and total phosphorous (TP) of 96.0%, 97.6%, 99.0%, and 69.1%, respectively, at dosages of 0.5 g/L of poly aluminium chloride (PAC), 2 mg/L of polyacrylamide (PAM), and 1 g/L of magnetic seeds in Stage II, and concentrations of TN, COD, and NH4+-N in effluent can meet the discharge standards for pollutants for livestock and poultry breeding (GB18596-2001, China). The nitrogen removal loading (NRL) was increased from 0.21 to 0.28 kg/(m3·d), and the hydraulic retention time (HRT) was shortened from 5.0 days to 4.3 days. High-throughput sequencing analysis was carried out to investigate microbial community evolution, and the results showed that the relative abundance of ammonia-oxidizing bacteria (AOB) in the SMBR increased from 0.1% without pre-treatment to 1.78% with the pre-treatment of MC.

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.

Effect of Ultrasonic Pretreatment for the Anaerobic Digestion of Sewage Sludge

2012 ◽  
Vol 531 ◽  
pp. 528-531 ◽  
Author(s):  
Na Wei
Keyword(s):  
Anaerobic Digestion ◽  
Sewage Sludge ◽  
Volatile Fatty Acids ◽  
Biogas Production ◽  
Oxygen Demand ◽  
High Concentration ◽  
Ultrasonic Pretreatment ◽  
Soluble Chemical Oxygen Demand ◽  
Pre Treatment ◽  
Settling Characteristics

Anaerobic digestion is an economic and environmentally friendly technology for treating the biomass material-sewage sludge, but has some limitations, such as the low efficient biogass production. In this paper ultrasound was proposed as pre-treatment for effective sludge anaerobic digestion. Sludge anaerobic digestion experiments with ultrasonic pretreatment was investigated. It can be seen that this treatment effectively leaded to the increase of soluble chemical oxygen demand(SCOD) and volatile fatty acids(VFA)concentration. High concentration of VFA leaded to a increase in biogas production. Besides, the SV of sludge was reduced and the settling characteristics of sludge was improved after ultrasonic pretreatment. It can be concluded that sludge anaerobic digestion with ultrasonic pretreatment is an effective method for biomass material transformation.

scholarly journals Compost leachate treatment using polyaluminium chloride and nanofiltration

2017 ◽  
Vol 15 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Marjana Simonič
Keyword(s):  
Zeta Potential ◽  
Isoelectric Point ◽  
Oxygen Demand ◽  
Treatment Method ◽  
Aluminium Chloride ◽  
Leachate Treatment ◽  
Physico Chemical ◽  
Pre Treatment ◽  
Ph Range ◽  
Compost Leachate

AbstractLaboratory scale filtration tests utilizing leachate were conducted to investigate fouling and filtration performance of nanofiltration membranes. The work presented in this study is conducted on real samples rather than model water. Physico-chemical analyses showed that the leachate contained a lot of organic substances, exceeding 20000 mg/L O2 expressed as chemical oxygen demand. Proper pre-treatment method must be chosen in order to reduce fouling index. Coagulation pre-treatment using poly-aluminium chloride was chosen. Two thin film polysulfone membranes were used, purchased by Osmonic Desal. The focus of this research is to assess the influence of the particle size and zeta-potential of the colloidal fraction in leachate on nanofiltration performance. The isoelectric point of both membranes was 4.7 and 4.3, respectively. The fouled membranes were negatively charged over the pH range with isoelectric point shifting to the left (lower pH) indicating the foulant material mainly not charged. It was confirmed by its zeta-potential, measured at -2 mV.

scholarly journals A New Green Model for the Bioremediation and Resource Utilization of Livestock Wastewater

2021 ◽  
Vol 18 (16) ◽  
pp. 8634
Author(s):  
Linhe Sun ◽  
Huijun Zhao ◽  
Jixiang Liu ◽  
Bei Li ◽  
Yajun Chang ◽  
...  
Keyword(s):  
Rapid Growth ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Swine Wastewater ◽  
Human Consumption ◽  
Nitrogen Accumulation ◽  
Livestock Wastewater ◽  
Water Dropwort

The rapid growth of the livestock and poultry industries has resulted in the production of a large amount of wastewater, and the treatment of this wastewater requires sustainable and environmentally friendly approaches such as phytoremediation. A substrate-free floating wetland planted with water dropwort (Oenanthe javanica), a common vegetable in Southeast China, was constructed to purify a lagoon with anaerobically and aerobically treated swine wastewater in Suqian, China. The average removal rates of total nitrogen, ammonium nitrogen, nitrite nitrogen, and chemical oxygen demand were 79.96%, 95.04%, 86.14%, and 59.91%, respectively, after 40 days of treatment. A total of 98.18 g∙m−2 nitrogen and 19.84 g∙m−2 phosphorus were absorbed into plants per harvest through the rapid growth of water dropwort biomass, and the nitrogen accumulation ability was similar to that observed of other plants, such as water hyacinth. In addition, the edible part of water dropwort was shown to comply with the Chinese National Food Sanitation Standards and be safe for human consumption. Its low soluble sugar content also makes it a suitable addition to the daily diet. Overall, substrate-free floating constructed wetlands planted with water dropwort could be more widely used for livestock wastewater purification and could be integrated with plant–livestock production in China because of its high removal efficiency and recycling utilization of water dropwort biomass.

Ammonium nitrogen removal from slurry-type swine wastewater by pretreatment using struvite crystallization for nitrogen control of anaerobic digestion

2004 ◽  
Vol 49 (5-6) ◽  
pp. 215-222 ◽  
Author(s):  
B.U. Kim ◽  
W.H. Lee ◽  
H.J. Lee ◽  
J.M. Rim
Keyword(s):  
Phosphoric Acid ◽  
Magnesium Oxide ◽  
Nitrogen Removal ◽  
High Capacity ◽  
Ammonium Nitrogen ◽  
Swine Wastewater ◽  
Molar Ratio ◽  
High Concentration ◽  
Nitrogen And Phosphorus ◽  
Struvite Crystallization

Precipitation of ammonium together with phosphate and magnesium is a possible alternative for lowering the nitrogen content of wastewater. In this study we examine the removal of ammonium nitrogen and phosphorus from slurry-type swine wastewater containing high concentrations of nutrients by the addition of phosphoric acid along with either calcium oxide or magnesium oxide, which leads to the crystallization of insoluble salts such as hydroxyapatite and struvite. The struvite crystallization method showed a high capacity for the removal of nitrogen when magnesium oxide and phosphoric acid were used as the magnesium and phosphate sources, respectively. When it was applied to swine wastewater containing a high concentration of nitrogen, the injection molar ratio of Mg2+:NH4+:PO43- that gave maximum ammonium nitrogen removal was 3.0:1.0:1.5.

Bioelectrochemically-assisted nitrogen removal in osmotic membrane bioreactor

2020 ◽  
Author(s):  
You Wu ◽  
Yun Cai ◽  
Yu-Xiang Lu ◽  
Li-Min Zhang ◽  
Xiao-Li Yang ◽  
...  
Keyword(s):  
Microbial Community ◽  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Operation Mode ◽  
Oxygen Demand ◽  
Denitrifying Bacteria ◽  
Future Research ◽  
Ammonia Oxidizing Bacteria ◽  
Nitrite Oxidizing Bacteria

Abstract Nitrogen removal in osmosis membrane bioreactor (OMBR) is important to its applications but remains a challenge. In this study, a bioelectrochemically-assisted (BEA) operation was integrated into the feed side of OMBRs to enhance nitrogen removal, and sodium acetate was served as a draw solute and supplementary carbon source for the growth of denitrifying bacteria due to reversed-solute. The effects of operation mode and influent ammonium (NH4+) concentration were systematically examined. Compared to a conventional OMBR, the integrated BEA-OMBR achieved higher total nitrogen removal efficiency of 98.13%, and chemical oxygen demand removal efficiency of 95.83% with the influent NH4+-N concentration of 39 mg L−1. The sequencing analyses revealed that ammonia-oxidizing bacteria (0–0.04%), nitrite-oxidizing bacteria (0–0.16%), and denitrifying bacteria (1.98–8.65%) were in abundance of the microbial community in the feed/anode side of integrated BEA-OMBR, and thus BEA operation increased the diversity of the microbial community in OMBR. Future research will focus on improving nitrogen removal from a high ammonium strength wastewater by looping anolyte effluent to the cathode. These findings have demonstrated that BEA operation can be an effective approach to improve nitrogen removal in OMBRs toward sustainable wastewater treatment.

The removal of residual organic matter from biologically treated swine wastewater using membrane bioreactor process with powdered activated carbon

2004 ◽  
Vol 49 (5-6) ◽  
pp. 451-457 ◽  
Author(s):  
G.D. Whang ◽  
Y.M. Cho ◽  
H. Park ◽  
J.G. Jang
Keyword(s):  
Activated Carbon ◽  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Membrane Separation ◽  
Oxygen Demand ◽  
Optimal Operation ◽  
Powdered Activated Carbon ◽  
Swine Wastewater ◽  
Residual Organic Matter ◽  
Bioreactor Process

The objective of this study was to characterize the mechanisms of the COD removal in the membrane bioreactor (MBR) process with powdered activated carbon (PAC) addition and to determine its optimal operation, for the removal of residual organic matters (ROM) from biologically treated swine wastewater. The MBR process with PAC showed higher removal efficiency of chemical oxygen demand (CODMn) than that without PAC. When the average CODMn concentration of the influent was 217 mg/L, the average CODMn concentration of the permeate from the MBR with PAC was about 41.5 mg/L, indicating an approximate removal efficiency of 81%. On the other hand, the average CODMn concentration of the permeate from the MBR without PAC was 172 mg/L. The PAC dosage estimated to obtain the above removal efficiency was about 0.74 g per litre of influent. Among the total residual organics removed by PAC-added MBR, 46.5% was removed by PAC adsorption, 20.8% by biodegradation, 4.4% by membrane separation, and 9.3% by enhanced microorganism activity. From these results, the MBR process with PAC was considered as a very useful treatment process for the reduction of CODMn in biologically treated swine wastewater.

scholarly journals Kinetics of the Organic Compounds and Ammonium Nitrogen Electrochemical Oxidation in Landfill Leachates at Boron-Doped Diamond Anodes

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4971
Author(s):  
Barbara Krystyna Wilk ◽  
Małgorzata Szopińska ◽  
Aneta Luczkiewicz ◽  
Michał Sobaszek ◽  
Ewa Siedlecka ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
Organic Compounds ◽  
Oxygen Demand ◽  
Ammonium Nitrogen ◽  
Cod Removal ◽  
High Concentration ◽  
Landfill Leachates ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Energy Consuming

Electrochemical oxidation (EO) of organic compounds and ammonium in the complex matrix of landfill leachates (LLs) was investigated using three different boron-doped diamond electrodes produced on silicon substrate (BDD/Si)(levels of boron doping [B]/[C] = 500, 10,000, and 15,000 ppm—0.5 k; 10 k, and 15 k, respectively) during 8-h tests. The LLs were collected from an old landfill in the Pomerania region (Northern Poland) and were characterized by a high concentration of N-NH4+ (2069 ± 103 mg·L−1), chemical oxygen demand (COD) (3608 ± 123 mg·L−1), high salinity (2690 ± 70 mg Cl−·L−1, 1353 ± 70 mg SO42−·L−1), and poor biodegradability. The experiments revealed that electrochemical oxidation of LLs using BDD 0.5 k and current density (j) = 100 mA·cm−2 was the most effective amongst those tested (C8h/C0: COD = 0.09 ± 0.14 mg·L−1, N-NH4+ = 0.39 ± 0.05 mg·L−1). COD removal fits the model of pseudo-first-order reactions and N-NH4+ removal in most cases follows second-order kinetics. The double increase in biodegradability index—to 0.22 ± 0.05 (BDD 0.5 k, j = 50 mA·cm−2) shows the potential application of EO prior biological treatment. Despite EO still being an energy consuming process, optimum conditions (COD removal > 70%) might be achieved after 4 h of treatment with an energy consumption of 200 kW·m−3 (BDD 0.5 k, j = 100 mA·cm−2).

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