Study on Operation Effect of Two-Stage MSL System for Rural Decentralized Sewage Treatment DOI Open Access

Qingtao Hu,

Anhong Bao,

Zenan Niu

et al.

Water, Journal Year: 2024, Volume and Issue: 16(22), P. 3204 - 3204

Published: Nov. 8, 2024

To improve the removal efficiency of rural domestic sewage, a two-stage multi-soil-layer sewage treatment system with an “aeration section + non-aeration section” was designed, and its performance observed under different influent loads aeration intensities. The experiment ran for total 150 days, results showed that (MSL) could effectively reduce effluent concentration to meet discharge standards. Under operating conditions hydraulic load 1000 L·m−2·d−1 air–water ratio 4:1, final average concentrations COD, NH3-N, TN, TP were 106.5 mg·L−1, 7.4 13.9 0.12 18.6 respectively, rates 85.3%, 82%, 72.5%, 96%, 85%. A longer retention time ideal anoxic ensured by designing certain height in system. Adding allowed synchronous nitrification–denitrification reaction reasonable loads, ultimately enabling

Language: Английский

Impact of four hydroponic nutrient solutions and regrowth on yield, safety and essential oil profile of basil (Ocimum basilicum L.) cultivated in soilless culture systems DOI Creative Commons
Saeid Hazrati, Giuseppe Pignata, Manuela Casale

et al.

Folia Horticulturae, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

ABSTRACT Herb production in soilless culture systems (SCSs) requires precise composition of hydroponic nutrient solutions (HNSs) to optimise growth, yield and quality. This study aimed investigate the effect four having different ion concentrations on yield, quality safety basil grown a New Growing System (NGS ® ) at two harvest times. The results showed that as concentration increased, leaf fresh weight decreased, while total dry matter varied with time. Lower levels phosphorus potassium HNS increased nitrate leaves, higher nitrogen specifically increasing levels, second highest N12P2K6 (nitrogen: 12 mmol · L −1 ; phosphorus: 2 potassium: 6 treatment. SCS was successful reducing growth microbial contamination, lowest mould yeast contamination detected containing N6P4K12. affected contents essential oil compounds such linalool (the amount concentration) (E)-α-bergamotene concentration). In conclusion, quantity, microbiological NGS depend used harvesting

Language: Английский

Citations

0
Integration of synchronous nitrification-denitrification in a single-stage biofilm reactor for phosphorus removal and enrichment DOI
Zhen Bi, Ye Yuan,

Ruolin Ding

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 117260 - 117260

Published: May 1, 2025

Language: Английский

Citations

0
Study on Operation Effect of Two-Stage MSL System for Rural Decentralized Sewage Treatment DOI Open Access

Qingtao Hu,

Anhong Bao,

Zenan Niu

et al.

Water, Journal Year: 2024, Volume and Issue: 16(22), P. 3204 - 3204

Published: Nov. 8, 2024

To improve the removal efficiency of rural domestic sewage, a two-stage multi-soil-layer sewage treatment system with an “aeration section + non-aeration section” was designed, and its performance observed under different influent loads aeration intensities. The experiment ran for total 150 days, results showed that (MSL) could effectively reduce effluent concentration to meet discharge standards. Under operating conditions hydraulic load 1000 L·m−2·d−1 air–water ratio 4:1, final average concentrations COD, NH3-N, TN, TP were 106.5 mg·L−1, 7.4 13.9 0.12 18.6 respectively, rates 85.3%, 82%, 72.5%, 96%, 85%. A longer retention time ideal anoxic ensured by designing certain height in system. Adding allowed synchronous nitrification–denitrification reaction reasonable loads, ultimately enabling

Language: Английский

Citations

1