Treatment of a slaughterhouse wastewater: effect of internal recycle rate on chemical oxygen demand, total Kjeldahl nitrogen and total phosphorus removal

2011 ◽  
Vol 32 (15) ◽  
pp. 1755-1759 ◽  
Author(s):  
P. Fongsatitkul ◽  
D. G. Wareham ◽  
P. Elefsiniotis ◽  
P. Charoensuk
Keyword(s):  
Chemical Oxygen Demand ◽  
Total Phosphorus ◽  
Phosphorus Removal ◽  
Oxygen Demand ◽  
Total Kjeldahl Nitrogen ◽  
Slaughterhouse Wastewater ◽  
Recycle Rate ◽  
Kjeldahl Nitrogen

scholarly journals Bioremediation of Parboiled Rice Effluent Supplemented with Biodiesel-Derived Glycerol UsingPichia pastorisX-33

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Diego Gil de los Santos ◽  
Carlos Gil Turnes ◽  
Fabricio Rochedo Conceição
Keyword(s):  
Pichia Pastoris ◽  
Carbon Source ◽  
Chemical Oxygen Demand ◽  
Biomass Production ◽  
Biomass Yield ◽  
Oxygen Demand ◽  
Total Kjeldahl Nitrogen ◽  
Parboiled Rice ◽  
Kjeldahl Nitrogen ◽  
Biodiesel Industry

This paper describes the use ofPichia pastorisX-33 as a bioremediator to reduce the chemical oxygen demand (COD), total Kjeldahl nitrogen (TKN), and phosphorus (P-), after culture in parboiled rice effluent supplemented with p.a. glycerol or a glycerol by-product of the biodiesel industry. The greatest reduction in the COD (55%), TKN (45%), and P- (52%) of the effluent was observed in cultures ofP. pastorisX-33 supplemented with 15 g ·L−1of biodiesel-derived glycerol. Furthermore, the overall biomass yield was 2.1 g ·L−1. These data suggest that biodiesel-derived glycerol is an efficient carbon source for the bioremediation of parboiled rice effluent and biomass production.

scholarly journals Effect of hydraulic retention time on chemical oxygen demand and total nitrogen removal in intermittently aerated constructed wetlands

2020 ◽  
Vol 15 (3) ◽  
pp. 1 ◽  
Author(s):  
Isabela Pires da Silva ◽  
Gabriela Barbosa da Costa ◽  
João Gabriel Thomaz Queluz ◽  
Marcelo Loureiro Garcia
Keyword(s):  
Chemical Oxygen Demand ◽  
Constructed Wetlands ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Constructed Wetland ◽  
Retention Time ◽  
Hydraulic Retention Time ◽  
Subsurface Flow ◽  
Oxygen Demand ◽  
Intermittent Aeration

   This study evaluated the effect of hydraulic retention time on chemical oxygen demand (COD) and total nitrogen (TN) removal in an intermittently aerated constructed wetlands. Two horizontal subsurface-flow constructed wetlands were used: one without aeration and the other aerated intermittently (1 hour with aeration/7 hours without aeration). Both systems were evaluated treating domestic wastewater produced synthetically. The flow rate into the two CWs was 8.6 L day-1 having a hydraulic retention time of 3 days. The results show that the intermittently aerated constructed wetland were highly efficient in removing COD (98.25%), TN (83.60%) and total phosphorus (78.10%), while the non-aerated constructed wetland showed lower efficiencies in the removal of COD (93.89%), TN (48.60%) and total phosphorus (58.66). These results indicate, therefore, that intermittent aeration allows the simultaneous occurrence of nitrification and denitrification processes, improving the removal of TN in horizontal subsurface-flow constructed wetlands. In addition, the use of intermittent aeration also improves the performance of constructed wetlands in removing COD and total phosphorus.

Treatment of slaughterhouse plant wastewater by using a membrane bioreactor

2011 ◽  
Vol 64 (1) ◽  
pp. 214-219 ◽  
Author(s):  
Levent Gürel ◽  
Hanife Büyükgüngör
Keyword(s):  
Organic Carbon ◽  
Chemical Oxygen Demand ◽  
Membrane Bioreactor ◽  
Nitrate Nitrogen ◽  
Oxygen Demand ◽  
Organic Substances ◽  
Slaughterhouse Wastewater ◽  
Treated Effluent ◽  
Nitrogen Concentrations ◽  
Removal Efficiencies

The use of a membrane bioreactor (MBR) for removal of organic substances and nutrients from slaughterhouse plant wastewater was investigated. The chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) concentrations of slaughterhouse wastewater were found to be approximately 571 mg O2/L, 102.5 mg/L, and 16.25 mg PO4-P/L, respectively. A submerged type membrane was used in the bioreactor. The removal efficiencies for COD, total organic carbon (TOC), TP and TN were found to be 97, 96, 65, 44% respectively. The COD value of wastewater was decreased to 16 mg/L (COD discharge standard for slaughterhouse plant wastewaters is 160 mg/L). TOC was decreased to 9 mg/L (TOC discharge standard for slaughterhouse plant wastewaters is 20 mg/L). Ammonium, and nitrate nitrogen concentrations of treated effluent were 0.100 mg NH4-N/L, and 80.521 mg NO3-N/L, respectively. Slaughterhouse wastewater was successfully treated with the MBR process.

Quantitative Eco-Compensation Criterion in Taihu Lake Area of Jiangsu Province, China

2013 ◽  
Vol 726-731 ◽  
pp. 4095-4100
Author(s):  
Rong Rong Xie ◽  
Yong Pang
Keyword(s):  
Chemical Oxygen Demand ◽  
Total Phosphorus ◽  
Taihu Lake ◽  
Census Data ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Pollution Source ◽  
Jiangsu Province ◽  
Lake Area ◽  
Chinese Yuan

To redress the deteriorating environment, policies regarding river eco-compensation have been issued in China since 2008. Due to the high cost, eco-compensation has not been well implemented in the Taihu pilot region. Therefore, how to determine the compensation criterion is already a priority. In this paper, a compensation criterion model based on the treatment costs of sewage was introduced. Using the pollution source census data covering 2007, 2009, 2010 and 2011 in the Taihu lake area of Jiangsu province, the average eco-compensation criterion for chemical oxygen demand (COD) is 2,000 Chinese Yuan (CNY) ± 325 CNY per ton and ammonia nitrogen (NH4-N) and total phosphorus (TP) are 8,000 CNY ± 1,300 CNY and 80,000 CNY ± 13,000 CNY per ton, respectively. The new method can provide an important template for managers when drafting river eco-compensation schemes.

scholarly journals Eco-Friendly Soaking Process Using Tannic Acid as an Alternative Bactericide

2014 ◽  
Vol 40 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Arife Candaş Adigüzel Zengin ◽  
Selime Menteş Çolak ◽  
Gökhan Zengin ◽  
Eylem Kiliç
Keyword(s):  
Natural Products ◽  
Tannic Acid ◽  
Bacterial Load ◽  
Oxygen Demand ◽  
Hazardous Substances ◽  
Total Kjeldahl Nitrogen ◽  
Leather Industry ◽  
Tannery Effluents ◽  
High Concentrations ◽  
Kjeldahl Nitrogen

Abstract Eco-friendly leather processes based on the usage of natural products have become a potentially attractive issue for leather industry during the last few decades. Synthetic protective chemicals like bactericides used in most soaking process are known as hazardous substances and cause tannery effluents with high concentrations of Chemical Oxygen Demand (COD). In the present study, the effect of tannic acid on microorganisms, skin, wool and effluent were investigated in order to demonstrate the applicability of tannic acid in soaking process instead of commonly used bactericides. The bacterial load (cfu/ml), COD and Nitrogen Content (N) of the soaking effluents and Total Kjeldahl Nitrogen (TKN) content of skins and wools were investigated. Application of 0.5 and 1 wt% tannic acid concentrations was more effective than commercial bactericide, while comparable results were achieved by 0.1 and 0.3 wt% tannic acid. The application of tannic acid for soaking process resulted in lower COD and N values of effluents. The results show that tannic acid has the potential to be an alternative, eco-friendly bactericide for leather industry by reducing the pollution of leather soaking process.

scholarly journals Bio-tower Application for Wastewater Treatment

2020 ◽  
pp. 1-7
Author(s):  
Klaus Doelle ◽  
Yue Qin ◽  
Qian Wang
Keyword(s):  
Wastewater Treatment ◽  
Chemical Oxygen Demand ◽  
Total Phosphorus ◽  
Municipal Wastewater ◽  
Oxygen Demand ◽  
Growth Media ◽  
Performance Tests ◽  
Flow Rates ◽  
Batch Type ◽  
Phosphorus Reduction

The study tested the performance of a batch-type recirculating laboratory scale bio-tower for the treatment of municipal wastewater. Performance tests were done with a HACH DR-1900 spectrophotometer include chemical oxygen demand, total phosphorus and nitrogen ammonia. This study showed that the recirculated laboratory type bio-tower containing 0.276 ft3 (0.008 m3) of polypropylene growth media with a surface area of 6.624 ft2 (0.615 m2) can reduce the chemical oxygen demand between 70% to 87%. NH3-N reduction was found to be between 94% to 96%, and total phosphorus reduction was between 69% and 87% for flow rates of 0.6 l/min to 1.5 l/min.

scholarly journals A model for cost estimation of system for piggery wastes treatment ponds: a case study

2003 ◽  
Vol 23 (3) ◽  
pp. 463-473
Author(s):  
Waldir Medri ◽  
Rejane Helena Ribeiro da Costa
Keyword(s):  
Total Phosphorus ◽  
Cost Estimation ◽  
Water Hyacinth ◽  
Treatment System ◽  
Fecal Coliforms ◽  
Design Parameters ◽  
Total Kjeldahl Nitrogen ◽  
System A ◽  
Kjeldahl Nitrogen

This article presents the results from the monitoring of a system of ponds for the treatment of piggery wastes, carried out during a 20 months period, with the objective to determine design parameters for the optimization of the treatment system. A series composed of two anaerobic ponds, one facultative pond and one water hyacinth pond, gave an efficiency of 97% in the removal of BOD5, 93% for total phosphorus, 91% for total Kjeldahl nitrogen and a removal of 7 log units for fecal coliforms. A model of the optimization incurred in the treatment of these wastes was developed, within economic concepts.

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