Comparing Nutrient Removal from Membrane Filtered and Unfiltered Domestic Wastewater Using Chlorella vulgaris

Domestic wastewater contains chemical compounds that can be used as nutrients for microalgae. Removing these chemical compounds from wastewater by microalgae might help in reducing the operation cost of wastewater management while minimizing the cultivation cost for large-scale microalgae metabolite production. In this study, domestic wastewater collected from Indah Water Konsortium (IWK), Kuala Lumpur, Malaysia, was assessed as growth media for two types of microalgae, namely Chlorella vulgaris and Haematococcus pluvialis. The biomass growth and nutrient removal efficiency of total nitrogen (TN), total phosphorus (TP), and total ammonia (TAN) in different concentrations of diluted wastewater were measured. The results showed that biomass concentration (0.227 g/L), biomass productivity (0.029 g/L/day), and specific growth rate (0,284 d-1) yielded by C. vulgaris in 14 days of 80% wastewater were comparable to those microalgae grew in standard Bold’s Basal medium (BBM). Besides, C. vulgaris grew in 50% wastewater to remove TN, TP, and TAN with the highest removal efficiency (>88%). For H. pluvialis, the biomass concentration in all wastewater concentrations was lower than BBM. The removal efficiencies of TN and TP were lower than 55%, but more than 80% for removal efficiency of TAN in 50% and 80% wastewater. Hence, C. vulgaris has better growth performance and nutrient removal efficiency than H. pluvialis. These findings indicated that IWK domestic wastewater could be used as growth media for microalgae, especially C. vulgaris.

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Organic and nutrient removal for domestic wastewater treatment using bench-scale sequencing batch reactor

10.1063/5.0045224 ◽

2021 ◽

Author(s):

J. Y. Ng ◽

D. L. Wong ◽

S. R. M. Kutty ◽

A. H. Jagaba

Keyword(s):

Wastewater Treatment ◽

Nutrient Removal ◽

Sequencing Batch Reactor ◽

Batch Reactor ◽

Domestic Wastewater ◽

Bench Scale ◽

Domestic Wastewater Treatment

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Comparison and Evaluation of Three Aquatic Plants for Determining the Efficiency of Nutrient Removal in Domestic Wastewater Treatment

Young Research Forum ◽

10.1515/9783868598858-008 ◽

2021 ◽

pp. 111-112

Author(s):

Zarela Garcia Trujillo

Keyword(s):

Wastewater Treatment ◽

Aquatic Plants ◽

Nutrient Removal ◽

Domestic Wastewater ◽

Domestic Wastewater Treatment

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Removal of Ammonia Nitrogen from Domestic Wastewater Using Vertical Aerated Limestone Filter

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.752-753.232 ◽

2015 ◽

Vol 752-753 ◽

pp. 232-237

Author(s):

Rafidah binti Hamdan ◽

Izzati Izwani Ibrahim ◽

Ain Nabila Abdul Talib

Keyword(s):

Dissolved Oxygen ◽

Water Body ◽

Nutrient Removal ◽

Domestic Wastewater ◽

Ammonia Nitrogen ◽

Maintenance Cost ◽

Effluent Quality ◽

Filter System ◽

Nitrification Process ◽

Final Effluent

Nitrogen is a naturally occurring element that is essential for growth and reproduction in both plants and animals. Excessive concentrations in the water body can cause excessive growth of algae and other plants, leading to accelerate eutrophication of lakes, and occasional depletion of dissolved oxygen. To remove nitrogen conventionally from domestic wastewater requires a high cost technology due to consumption of chemicals, high operational and maintenance cost. Therefore, an alternative low cost treatment technology particularly for nutrient removal including nitrogen removal system has been developed to improve the final effluent quality that is an aerated rock filter system. However, the optimization study under warm climate has not yet been developed. Hence, the present study was carried out to investigate the removal of ammonia nitrogen (AN) from domestic wastewater through nitrification process using a lab-scale vertical aerated limestone filter. Domestic wastewater sample used in this study was collected from Taman Bukit Perdana Wastewater Treatment Plant (WWTP), Batu Pahat, Johor owned by IWK. The experiment has been carried out for 10 weeks. The influent and effluent of the vertical aerated limestone filter system have been sampled and analyzed on biweekly basis for selected parameters including AN, Total Kjedhal Nitrogen (TKN), pH, alkalinity, temperature and dissolved oxygen to monitor the effectiveness of the filter. Results from this study show that nitrification process has took place within the aerated limestone filter as the results from laboratory experiments show that AN in wastewater was oxidized to nitrate and efficiently removed as the removal of AN was ranged from 85 % to 92 % and the removal percentage of TKN was ranged from 83.52 % - 91.67 %. The temperature was in the average of 26.3oC±0.75, pH value average of , DO was from 6.64 mg/L to 7.75 mg/L , and the alkalinity was from 15 to 110 mg / l as CaCO3 . Therefore, from this study it can be concluded that aerated rock filter system has high potential in removing AN and TKN. It is also able to produce a good final effluent quality which is comply with the effluent requirement for nutrient removal in wastewater under the Environmental Quality Act (Sewage) Regulations, 2009 that is safe to be released to the water body.

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