Retention of selected heavy metals: Cd, Cu, Pb in a hybrid wetland system

2001 ◽  
Vol 44 (11-12) ◽  
pp. 463-468 ◽  
Author(s):  
H. Obarska-Pempkowiak
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Treatment Plant ◽  
Dissolved Metals ◽  
Metals Removal ◽  
Dissolved Heavy Metals ◽  
Wetland System ◽  
Cascade Filter ◽  
The Hill ◽  
Vegetated Submerged Bed

The budget of heavy metals was investigated in a constructed wetland in a hybrid wetland system near Gdan«sk. It is a pilot wastewater treatment plant (WWTP) designed for 150 PE (person equivalent). The system consists of two sections: a vegetated submerged bed (VSB) with horizontal flow of sewage and a cascade filter situated on a slope of a hill. Total area of the constructed wetland is about 870 m2. Domestic sewage, after a conventional pretreatment (consisting of an Imhoff tank and a trickling filter) is pumped to the VSB filter located on the top of the hill and then flows through subsequent segments of the constructed wetland. In the period 1995-98 the measurements of several heavy metals (Cd, Cu, Pb) were carried out in sewage inflowing, outflowing and collected from the in between sections of the system. Moreover analysis of sediment collected in ditches of the cascade filter, VSB filter and reed were carried out. The content of heavy metals in suspended solids decreased along the course of treatment, starting from VSB filter, through the first ditch to the last ditch. Measurable concentrations of dissolved heavy metals were found in sewage collected from several subsequent ditches. Sorption was deemed the main mechanism of dissolved metals removal in subsequent ditches.

scholarly journals Distribution of heavy metals in various compartments of the constructed wetland system in Przywidz

2019 ◽  
pp. 297-305
Author(s):  
Hanna Obarska-Pempkowiak ◽  
Katarzyna Klimkowska
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Treatment Plant ◽  
Domestic Sewage ◽  
Point Of View ◽  
Filling Material ◽  
Toxic Heavy Metals ◽  
Wetland System ◽  
Cascade Filter ◽  
The Hill

In the last decade constructed wetlands have become a very popular technology for removal of contaminants from domestic sewage. They are also assesed from the point of view of their capacity for removal of toxic heavy metals and organic substances resistant to degradation. Constructed wetland in Przywidz localized about 60 km from Gdansk is a pilot wastewater treatment plant (WWTP) designed for 150 PE (person equivalent). The system consists of two sections: vegetated submerged bed (VSB) with horizontal flow of sewage and a cascade filter situated on a slope of a hill. Domestic sewage after a conventional pretreatment ( consists of an Imhoff tank and a trickling filter) is pumped to the VSB filter located on slope of the hill. Total area of constructed wetland is about 870 m2. In the period 1995-98 the measurments of several heavy metals (Cd, Cu, Pb) were carried out. These measurments were carried out in inflowing and outflowing sewage and as well in samples collected from each section of constructed wetland system. In particular analysis of sediment collected in ditches of the cascade filter, filling material of the dykes, VSB filter and plants were carried out. It was found out that content of heavy metals in suspended soil decreased along the course of treatment, starting from VSB filter, through the first ditch to the last ditch. Measurable concentration of dissolved heavy metals were found in sewage collected from several subsequent ditches. The main mechanism of removal on particular matter in subsequent ditches was sorption.

Performance of constructed wetland for selenium, nutrient and heavy metals removal from mine effluents

Chemosphere ◽  
2021 ◽  
pp. 130921
Author(s):  
Selma Etteieb ◽  
Mehdi Zolfaghari ◽  
Sara Magdouli ◽  
Kamalpreet Kaur Brar ◽  
Satinder Kaur Brar
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Heavy Metals Removal ◽  
Metals Removal

Wastewater treatment in tsunami affected areas of Thailand by constructed wetlands

2007 ◽  
Vol 56 (3) ◽  
pp. 69-74 ◽  
Author(s):  
H. Brix ◽  
T. Koottatep ◽  
C.H. Laugesen
Keyword(s):  
Constructed Wetland ◽  
Subsurface Flow ◽  
Treatment Plant ◽  
System Capacity ◽  
Treated Wastewater ◽  
Polluted Water ◽  
Wastewater Management ◽  
Grey Water ◽  
Septic Tanks ◽  
Wetland System

The tsunami of December 2004 destroyed infrastructure in many coastal areas in South-East Asia. In January 2005, the Danish Government gave a tsunami relief grant to Thailand to re-establish the wastewater management services in some of the areas affected by the tsunami. This paper describes the systems which have been built at three locations: (a) Baan Pru Teau: A newly-built township for tsunami victims which was constructed with the contribution of the Thai Red Cross. Conventional septic tanks were installed for the treatment of blackwater from each household and its effluent and grey water (40 m3/day) are collected and treated at a 220 m2 subsurface flow constructed wetland. (b) Koh Phi Phi Don island: A wastewater collection system for the main business and hotel area of the island, a pumping station and a pressure pipe to the treatment facility, a multi-stage constructed wetland system and a system for reuse of treated wastewater. The constructed wetland system (capacity 400 m3/day) consists of vertical flow, horizontal subsurface flow, free water surface flow and pond units. Because the treatment plant is surrounded by resorts, restaurants and shops, the constructed wetland systems are designed with terrains as scenic landscaping. (c) Patong: A 5,000 m2 constructed wetland system has been established to treat polluted water from drainage canals which collect overflow from septic tanks and grey water from residential areas. It is envisaged that these three systems will serve as prototype demonstration systems for appropriate wastewater management in Thailand and other tropical countries.

scholarly journals Stabilization of Al-Rustamiya Waste Water Treatment Plant Sludge Using Lime

2020 ◽  
Vol 26 (9) ◽  
pp. 165-172
Author(s):  
Noor Ali Jasim ◽  
Jathwa Abdul Kareem Ibrahim
Keyword(s):  
Heavy Metals ◽  
Environmental Protection Agency ◽  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Waste Water Treatment Plant ◽  
Metals Removal ◽  
The Us ◽  
Two Parameters ◽  
Water Treatment Plant Sludge

A study was performed to evaluate heavy metals removal from sewage sludge using lime. The processes of stabilization using alkaline chemicals operating on a simple principle of raising pH to 12 or higher, with sufficient mixing and suitable contact time to ensure that immobilization can reduce heavy metals. A 0.157 m3 tank was designed to treat Al-Rustemeyia wastewater treatment plant sludge. Characteristics of raw sludge were examined through two parameters: pH and heavy metal analysis. Different lime doses of (0- 25) g CaO/100 g sludge were mixed manually with raw sludge in a rotating drum. The samples were analyzed two hours after mixing. pH and heavy metals results were compared with EPA and National Iraqi Standard (NIS). Results showed as lime was added, the concentration of heavy metals decreases the higher the dose, the less heavy metals concentrations in the sludge. Although the concentration of heavy metals in the sludge was among the determinants according to the US Environmental Protection Agency, the results showed that 750 g of lime per 3 kg of sludge had reduced the concentration of heavy metals zinc from (662.934) mg/kg sludge to (452.998) mg/kg sludge, copper from (113.101) mg/kg sludge to (64.981) mg/kg sludge, lead from (91.215) mg/kg sludge to (53.307) mg/kg sludge, nickel from 107.257 mg/kg sludge to (50.478) mg/kg sludge, molybdenum from (13.743) mg/kg sludge to (8.724) mg/kg sludge). At the same time, the dose of 450 g lime per 3 kg of sludge had reduced the concentration of chromium from (110.577) mg/kg sludge to (0) mg/kg sludge.

Technology Research for the Removal of Heavy Metals from Municipal Sludge

2013 ◽  
Vol 295-298 ◽  
pp. 1353-1358 ◽  
Author(s):  
He Ming Wang ◽  
Liang Shen ◽  
He Li Wang
Keyword(s):  
Heavy Metals ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Municipal Sewage ◽  
Chemical Extraction ◽  
Metals Removal ◽  
Removal Of Heavy Metals ◽  
Agricultural Use ◽  
Future Direction

Heavy metal pollution is one of the main obstacles of municipal sewage treatment plant sludge for agricultural use. This paper gives an overview of four kinds of commonly used techniques for heavy metals removal in sewage sludge: chemical extraction, bioleaching, electrokinetic technology and solidification - stabilization, also analyzed the future direction of development.

Zero-discharge of nutrients and water in a willow dominated constructed wetland

2001 ◽  
Vol 44 (11-12) ◽  
pp. 407-412 ◽  
Author(s):  
P. Gregersen ◽  
H. Brix
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
High Density Polyethylene ◽  
Salix Viminalis ◽  
Annual Rainfall ◽  
Soil Infiltration ◽  
Annual Basis ◽  
Zero Discharge ◽  
Wetland System

A novel constructed wetland system has been developed to treat sewage, evaporate water and recycle nutrients from single households at sites where effluent standards are stringent and soil infiltration is not possible. Main attributes of the willow wastewater cleaning facilities are that the systems have zero discharge, the willows evapotranspire the water, and nutrients can be recycled via the willow biomass produced in the system. The willow wastewater cleaning facilities generally consist of c. 1.5 m deep high-density polyethylene-lined basins filled with soil and planted with clones of willow (Salix viminalis L.). The surface area of the systems depends on the amount and quality of the sewage to be treated and the local annual rainfall. For a single household the area needed typically is between 200-300 m2. Settled sewage is dispersed underground into the bed under pressure. When correctly dimensioned, the willow will - on an annual basis - evapotranspire all water from the sewage and rain falling onto the system, and take up all nutrients and heavy metals from the sewage. The stems of the willows are harvested on a regular basis to remove nutrients and heavy metals and to stimulate the growth of the willows. Initial experiences from full-scale systems in Denmark show promising results.

scholarly journals Phytoremediation of Heavy Metals From Mixed Domestic Sewage Through Vertical- Flow Constructed Wetland Planted with Canna Indica and Acorus Calamus

2020 ◽  
Vol 15 (3) ◽  
pp. 430-440
Author(s):  
Mahesh Prasad Barya ◽  
Deepak Gupta ◽  
Reetika Shukla ◽  
Tarun Kumar Thakur ◽  
Virendra Kumar Mishra
Keyword(s):  
Heavy Metals ◽  
Constructed Wetland ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Acorus Calamus ◽  
Vertical Flow ◽  
Canna Indica ◽  
Treated Sewage ◽  
Wide Range ◽  
Vertical Flow Constructed Wetland

The removal of contaminants from sewage wastewater through constructed wetlands is becoming increasingly popular worldwide. Constructed wetland (CW) is a man-made structure for wastewater treatment that uses natural processes associated with wetland vegetation, soils, and their associated microbial combinations. This study investigated the performance of experimental vertical flow constructed wetland (VFCW) cells to remove heavy metals (HMs) from primary treated sewage. The primary treated sewage was collected from the sewage treatment plant (STP) in the campus of Indira Gandhi National Tribal University, Amarkantak, India. Sewage wastewater samples were collected from all cells of the experimental VFCW and analyzed for four heavy metals (Zn, Fe, Cu, and Cr). The plant species results show that the removal efficiency of the Canna indica L. for Zn, Fe, Cu, and Cr was 95%, 92%, 96%, and 93 % and Acorus calamus L.were 89 %, 80 %, 91 %, and 47 % respectively. These macrophytes with the substrate (gravel and sand) have presented a wide range of tolerance to all the selected metals and therefore can be used for field-scale constructed wetland removal of heavy metals from sewage wastewater.

Sign in / Sign up

Export Citation Format

Share Document