Removal of nitrogen and phosphorus from cattle farming wastewater using constructed wetland system

Abstract

The confined dairy cattle system employs the most modern production techniques with respect to the genetic standards of the herds. The success found in these systems promoted an increase in the number of confined animals and, consequently, an increase in the produced volume of waste, causing the waste from dairy cattle farming to be one of the largest problems in intensive management systems. This effluent has high amount of phosphorus and nitrogen, and the accumulation of these nutrients in surface waters can cause eutrophication of water courses deteriorating their quality. This study is aimed to evaluate the efficiency of a constructed wetland system, cultivated with vetiver grass (Vetiveria zizanioides) in the removal of important environmental pollutants nitrogen (N) and phosphorus (P) from dairy cattle farming wastewater. The effluent received pre-treatment and before passing through the constructed wetland system which was built in a trapezoidal shape. The wastewater from dairy cattle farming, at the inlet and outlet of the constructed wetland system, was biweekly analyzed for different forms of N (ammonia, total Kjeldahl N, nitrate and nitrite) and P. The constructed wetland system proposed cultivated with vetiver grass showed good removal pollutants with greater mean efficiency in the removal of nitrite (43.6%), the total Kjeldahl nitrogen (32.0%) and ammonia (31.0%). Vetiver grass cultivation showed good adaptation to the constructed wetland system, with satisfactory development and no visual symptoms of nutrients deficiency.

Evaluation of the Implementation Integrated Biological System Industrial Wastewater Treatment Plant: Pollutant Removal, Operational Maintenance, Estimation of Carbon Emission

“…Most wetland units degrade nutrient-type pollutants such as ammonia, phosphorus, and residual organic substances from previous processing (Geovana et al, 2016;Moenir et al, 2014;Marlena et al, 2018;Setianingsih et al, 2021). However, the high concentration of oil & grease pollutants and MBAS will be more effectively degraded under aerobic conditions (Primasari et al, 2011).…”

Pengolahan Limbah Industri Pengolahan Ikan Dengan Teknologi Gabungan Upflow Anaerobic Sludge Blanket (UASB)-Wetland

“…Unit Wetland digunakan untuk mereduksi kadar nitrogen organik didalam air limbah. Lahan basah buatan (constructed wetland) adalah sistem yang dirancang dan dibangun dengan memanfaatkan proses alami yang melibatkan vegetasi lahan basah, tanah, dan mikroba untuk membantu pengolahan air limbah (7) . Kemampuan penurunan Nitrogen industri pengolahan lele di unit wetland telah dibahas tersendiri secara spesifik di mana kemampuan penurunan ammonia di wetland mencapai 87,34% (8) , Kemampuan wetland dalam menurunkan ammonia, nitrat dan nitrit di beberapa industry juga telah dibahas dalam paper yang ditulis oleh Lamchaturapatr dan Vymazal (9; 10) .…”

Removal Efficiency of Heavy Metals Such as Lead and Cadmium by Different Substrates in Constructed Wetlands

“…Existing studies have found that CWs are mainly used in the treatment of organic wastewater such as landfill leachate [5], rural sewage [6], and aquaculture wastewater [7]. The main treatment indexes include chemical oxygen demand (COD), ammonia nitrogen (NH4-N) [8], total nitrogen (TN) [9], total phosphorus (TP) [10], and other pollutants, while there are relatively few studies on heavy metal wastewater [11]. It is speculated that the main reason is the poor removal of heavy metals by CWs, the less adsorption of substrates, the slow enrichment effect of plants, and the long treatment period, resulting in the limited application of CWs in the purification of heavy metal wastewater [12].…”