Influence of treated sewage sludge applications on temporal variations of plant nutrients and heavy metals in a Typic Xerofluvent soil

2008 ◽  
Vol 83 (3) ◽  
pp. 249-257 ◽  
Author(s):  
S. Delibacak ◽  
B. Okur ◽  
A. R. Ongun
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Temporal Variations ◽  
Plant Nutrients ◽  
Treated Sewage

Potentials of using nanofiltration to recover phosphorus from sewage sludge

2008 ◽  
Vol 57 (5) ◽  
pp. 707-714 ◽  
Author(s):  
C. Niewersch ◽  
C. N. Koh ◽  
T. Wintgens ◽  
T. Melin ◽  
C. Schaum ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Product Recovery ◽  
Phosphorus Recovery ◽  
Nanofiltration Membranes ◽  
Sewage Sludge Ash ◽  
Model Solutions ◽  
Treated Sewage ◽  
Increasing Demand ◽  
Sludge Ash

Due to the depletion of mineral phosphorus resources there is an increasing demand for efficient phosphorus recovery technologies. In this study the potential of nanofiltration to recover phosphorus from pre-treated sewage sludge is investigated. The efficiency of three commercial nanofiltration membranes (Desal 5DK, NP030; MPF34) was tested using model solutions. Desal 5DK showed the best selectivity for phosphorus. A pH of lower than 1.5 was found to be most suitable. Desal 5DK was used on four different sewage sludge ash eluates and on one sewage sludge. In these experiments it was shown that a separation of phosphorus from undesired components such as heavy metals was possible with significant variations in the efficiency for the different ash and sludge types. Additionally the achievable product recovery was investigated with model solutions. A product recovery of 57.1% was attained for pH 1 and 41.4% for pH 1.5.

scholarly journals Leaching Characteristics of Heavy Metals and Plant Nutrients in the Sewage Sludge Immobilized by Composite Phosphorus-Bearing Materials

2019 ◽  
Vol 16 (24) ◽  
pp. 5159 ◽  
Author(s):  
Shihe Li ◽  
Baihui Fang ◽  
Dongfang Wang ◽  
Xianqing Wang ◽  
Xiaobing Man ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Dynamic Models ◽  
Land Application ◽  
Plant Nutrients ◽  
National Standard ◽  
Limit Values ◽  
First Order ◽  
Leaching Characteristics ◽  
Bearing Materials

In order to evaluate the environmental risk caused by land application of sewage sludge, leaching characteristics of heavy metals and plant nutrients in the sewage sludge immobilized by composite phosphorus-bearing materials were investigated. Their cumulative release characteristics were confirmed. Furthermore, the first-order kinetics equation, modified Elovich equation, double-constant equation, and parabolic equation were used to explore dynamic models of release. Results showed that sewage sludge addition significantly increased electricity conductivity (EC) in leachates, and the concentrations of heavy metals (Cu, Cr, Zn) and plant nutrients (N, P, K) were also obviously increased. The highest concentrations of Cu, Cr, and Zn in the leachates were all below the limit values of the fourth level in the Chinese national standard for groundwater quality (GB/T14848-2017). The immobilization of composite phosphorus-bearing materials reduced the release of Cu and Cr, while increased that of Zn. The fitting results of modified Elovich model and double-constant model were in good agreement with the leaching process of heavy metals and plant nutrients, indicating their release process in soil under simulated leaching conditions was not a simple first-order reaction, but a complex heterogeneous diffusion process controlled by multifactor.

Processing dewatered sewage sludge using electrokinetic technology

2004 ◽  
Vol 50 (9) ◽  
pp. 205-211 ◽  
Author(s):  
J.Y. Wang ◽  
D.S. Zhang ◽  
O. Stabnikova ◽  
J.H. Tay
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Heterotrophic Bacteria ◽  
Land Application ◽  
Fecal Coliforms ◽  
Treated Sewage ◽  
Carbon Dioxide Evolution Rate ◽  
Removal Of Heavy Metals ◽  
Minor Losses ◽  
Dewatered Sewage Sludge

High content of heavy metals and presence of pathogens in the dewatered sewage sludge have been the main obstacles for land application of sewage sludge-made fertilizer. The aim of this study was to xamine the effects of the innovative electrokinetic (EK) technology on removal of heavy metals from sewage sludge, on the reduction of pathogens, and on sludge chemical characteristics. The results showed that the removal efficiencies for Zn, Cu, Ni, Cr, As and Pb were 94.9%, 95.4%, 89.7%, 67.8%, 31.2% and 18.7%, respectively. Acidification pretreatment of the dewatered sludge for 29 h decreased the content of heterotrophic bacteria from 1.5 × 108 c.f.u./g of wet sludge to 1.1 × 104 c.f.u./g of wet sludge. Although the initial content of total coliforms and fecal coliforms in sewage sludge were 5.8 × 105 c.f.u./g of wet sludge and 4.0 × 105 c.f.u./g of wet sludge, respectively, no viable cells were detected. Minor losses of K and N were detected, but the loss of P was found to be significant in EK treated sewage sludge. The treated sludge has technically considered as very stable based on the carbon dioxide evolution rate.

scholarly journals Effects of Solid Content and Substrate Concentration on Bioleaching of Heavy Metals from Sewage Sludge Using Aspergillus niger

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 994 ◽  
Author(s):  
Shen-Yi Chen ◽  
Sheng-Ying Wang
Keyword(s):  
Heavy Metals ◽  
Aspergillus Niger ◽  
Sewage Sludge ◽  
Metal Removal ◽  
Sucrose Concentration ◽  
Land Application ◽  
Solid Content ◽  
Maximum Efficiency ◽  
Metal Leaching ◽  
Treated Sewage

The presence of heavy metals in sewage sludge not only affects the performance of sludge anaerobic digestion process but also restricts the land application of treated sewage sludge. Therefore, a fungi-mediated bioleaching process for simultaneous metal leaching and sludge digestion by Aspergillus niger was developed to treat the sewage sludge containing heavy metals in this study. The effects of two important parameters, sludge solid content and substrate (sucrose) concentration, on the performance of fungal bioleaching were investigated in this study. The results showed that the rate of pH reduction increased with increasing sludge solid contents and sucrose concentrations. In this study, the efficiency of metal removal decreases in the order of Mn > Zn > Ni > Pb. The efficiencies of metal leaching and solid degradation (SS and VSS) were found to be decreased with an increase of sludge solid content and a decrease of sucrose concentration. At 2 days of reaction time, the maximum efficiency of metal solubilization was 95, 56, 21 and 13% for Mn, Zn, Ni and Pb, respectively.

scholarly journals Effects of Sewage Sludge at different pH Levels on Ipomoea Aquatica

2012 ◽  
Vol 47 (1) ◽  
pp. 47-54
Author(s):  
A Nessa ◽  
Shafiqur Rahmana ◽  
MTA Chowdhury ◽  
Z Parveen
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Soil Ph ◽  
Plant Nutrients ◽  
Alkaline Ph ◽  
Culture Experiment ◽  
Ipomoea Aquatica ◽  
Incubation Study ◽  
Plant Culture ◽  
Selection Of

An experiment was conducted to study the effects of sewage sludge on the response of Ipomoea aquatica to plant nutrients and heavy metals  in soil at different soil pH. An incubation study was done for the selection of four individual pH levels, viz., 4.7, 5.7, 6.6 and 7.8 to be  used for the plant culture experiment. Yield of Ipomoea aquatica and concentration and uptake of N, P, K, Ca, Mg, Cd, Cu, Fe, Mn and Zn  in the plant were evaluated. Application of sewage sludge in soil increased the concentration and uptake of the elements in Ipomoea. Slightly  acidic to slightly alkaline pH was found to be better for amendment of soil with sewage sludgeDOI: http://dx.doi.org/10.3329/bjsir.v47i1.10721 Bangladesh J. Sci. Ind. Res. 47(1), 47-54, 2012

scholarly journals Heavy metals partition between leachate and solids in the course of municipal sewage treatment

2019 ◽  
pp. 367-377
Author(s):  
Hanna Obarska-Pempkowiak ◽  
Wieslaw Butajlo ◽  
Janusz Pempkowiak
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Agricultural Land ◽  
Sewage Treatment ◽  
Municipal Sewage ◽  
Soil Fertilization ◽  
Second Stage ◽  
Secondary Sludge ◽  
Treated Sewage ◽  
Two Stages

Measurements of heavy metals contents (Cu, Zn, Pb, Cd) were carried out in liquid and solid fractions of sewage and sewage sludge after stabilization as well as dewatering. Investigation was carried out in municipal WWTP ,,Wschod" in Gdansk. The flow of sewage was equal to 88 000 m3 /d. The treatment consists of two stages: the first stage - mechanical (4screens, 2 sandtraps, 4 primary sedimentation tanks) and the second stage - advanced biological MUCT system (6 reactors - each incorporating the following chambers: dephosphatation, pre-denitrification, denitrification and nitrification followed by 2 secondary sedimentation tanks) modified by introduction of an additional chamber which secures dioxidation of sewage recirculated between nitrification and denitrification chambers. Sewage sludge (primary and secondary) is stabilized by fermentation. The last step of sludge utilization is mechanical dewatering. Samples of sewage were collected at the following points of the WWTP: at the beginning - raw sewage, mechanically treated sewage and biologically treated sewage. Samples of reject waters after thickening and after mechanical dewatering of sludge were collected too. The following types of sewage sludge were investigated: primary, secondary, thickened (on the Klein press), digested and mechanically dewatered (Noxon centrifuges). In the sampling points samples were collected twice per month during the 6 months period in the years 2000-2001. Inflowing sewage carried the following loads of heavy metals: Zn - 27.2 kg/d, Cu - 5.4 kg/d, Pb - 1.3 kg/d and Cd - 0.4 kg/d.  Basing on balances of heavy metals loads it was proved that 87.0% Zn and 83.0% Cu were kept in sludge. Among analysed sewage sludge samples, the highest contents of heavy metals was found in sludge after mechanical dewatering and in the mixture of primary and secondary sludge (Zn - 780.4 mg/kg d.m., Cu - 144.6 mg/kg d.m., Pb - 5.4 mg/kg d.m. and Cd - 2.4 mg/kg d.m. The contents of heavy metals in examined sludge were compared with Polish admissible loads of metals applied with sludge to soil fertilization. Basing on the findings, admissible loads of sewage sludge to agricultural land were not exceeded.

scholarly journals Content of Heavy Metals in Soil and in Pineapple Fertilized With Sewage Sludge

2019 ◽  
Vol 11 (9) ◽  
pp. 281
Author(s):  
Geraldo R. Zuba Junio ◽  
Regynaldo A. Sampaio ◽  
Luiz A. Fernandes ◽  
Rodinei F. Pegoraro ◽  
Victor M. Maia ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Block Design ◽  
Stabilization Process ◽  
Sludge Stabilization ◽  
Treated Sewage ◽  
Randomized Complete Block Design ◽  
Pineapple Fruit ◽  
Favorable Conditions ◽  
Composted Sludge

The usage of sewage sludge in agriculture can increase the levels of heavy metals in the soil, compromising their use as fertilizer. The objective of this study was to evaluate the contamination of soil and pineapple by heavy metals after the application of treated sewage sludge by different forms in three orders of soils under greenhouse conditions. The treatments, in a factorial scheme 7 × 3 were distributed in a randomized complete block design with three replications, corresponding to seven fertilization management: soil without fertilization, chemical fertilization, fertilization with composted sludge sewage, fertilization with vermicompost sewage sludge, fertilization with solarized sewage sludge, fertilization as sewage sludge dried in a Bruthus-Albrecht rotary sludge dryer and fertilization with limed sludge sewage, combined with three orders of soils: Cambisol, Nitisol and Acrisol. The Zn, Cu, Cr, Pb, Ba, Cd, Ni, As and Se contents were analyzed in the soil, in the leaf of greater length (D leaf) and in the fruit pulp of the pineapple. The Acrisol provided more favorable conditions to the increase in the availability and absorption of Pb and As by D leaf and fruit of the pineapple. Fertilization with composted, vermicompost and solarized sewage sludge provided high levels of Pb, As, Zn in leaf D and in the pineapple fruit, relating the interference of sludge stabilization process with the absorption of metals by pineapple fruits.

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