Corrigendum to “Removal of chromium (VI) from aqueous solution using vesicular basalt: A potential low cost wastewater treatment system” [Heliyon 4(7) (July 2018), Article e00682]

In the present day context of urban areas in Indian climate, looking at the statistics of the operating efficiency of existing mechanically operated water treatment plants run by local governing bodies and even when huge costs are incurred in their maintenance, it is necessitated that an efficient wastewater treatment system suitable in Indian climatic conditions and that too efficient, self-operating with minimum interference and at a low-cost construction, operating and maintenance cost. Decentralized onsite and naturally operating treatment methods are much efficient, cost-effective and feasible for Indian context. In current research, Effective positioning and modeling of the non-mechanised, gravity-based wastewater treatment system is carried out at refuge floor which is coined to be proposed as “environmental floor” for G+32 storeyed residential building. Comparative analytical study for structural and seismic response of both the structures (with and without environmental floors) is performed to check feasibility of the treatment system and quantify the benefits arising from it. It is observed form obtained results that the system can be adopted as an ultimate sustainable solution for wastewater treatment in cities where otherwise a lot of unhygienic conditions prevail if centralized treatment plants are not efficiently working.

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Treatment of Nitrogen and Phosphorus by a Constructed Upland-Wetland Wastewater Treatment System

Water Science & Technology ◽

10.2166/wst.1994.0185 ◽

1994 ◽

Vol 29 (4) ◽

pp. 177-184 ◽

Cited By ~ 18

Author(s):

C. H. House ◽

S. W. Broome ◽

M. T. Hoover

Keyword(s):

Wastewater Treatment ◽

Total Phosphorus ◽

Treatment Effectiveness ◽

Low Cost ◽

Treatment System ◽

Phosphorus Concentration ◽

Single Family ◽

Nitrogen And Phosphorus ◽

Wastewater Treatment System ◽

Wetland Cell

An Upland-Wetland wastewater treatment system was installed in Pamlico County, North Carolina in September 1989 to test its effectiveness in wastewater treatment for a single family home. Treatment effectiveness was evaluated from March 1990 to September 1991. The mound provided an aerobic environment that resulted in complete nitrification and reduction of phosphorus. Concentration of total nitrogen (TN) was lowered 64%, from 44.4 mg/L to 16.0 mg/L by the mound component. Nitrogen in the wastewater dosed into the mound was in the ammonium (NH4N) and organic forms, while essentially all the nitrogen present in water that had passed through the mound was in the nitrate (NO3N) form. The mound lowered total phosphorus (TP) concentration 86%, from 4.4 mg/L to 0.6 mg/L. The wetland cell planted with Phragmites australis was more effective than both the implanted cell and the cell planted with Typha angustifolia. Concentrations of (TN), primarily NO3N, were lowered from 16.0 mg/L to 11.1 mg/L or of that entering the cell. Total phosphorus was lowered 31%, from 0.6 mg/L to 0.3 mg/L. The Upland-Wetland Wastewater Treatment System has provided low cost, low maintenance and effective wastewater treatment.

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