scholarly journals The cellulose of Boehmeria nivea as natural flocculants: synthesis, modification, and flocculation analysis

2021 ◽  
Vol 896 (1) ◽  
pp. 012056
Author(s):  
D Fauzani ◽  
S Notodarmojo ◽  
M Handajani ◽  
Q Helmy ◽  
T Kardiansyah
Keyword(s):  
Wastewater Treatment ◽  
Surface Modification ◽  
Removal Efficiency ◽  
Synthetic Wastewater ◽  
Water And Wastewater Treatment ◽  
Turbidity Removal ◽  
Kaolin Suspension ◽  
Boehmeria Nivea ◽  
Water And Wastewater

Abstract Due to their non-toxicity and biodegradability, natural polymeric flocculants have gained popularity in water and wastewater treatment in recent years. Because of its broad availability, renewability, sustainability, and surface modification potential, cellulose, the most common polymer on the planet, is regarded as one of the foundation polymers for flocculant production and modification. The following article consists of a review of the latest developments regarding biopolymers, in particular, cellulose as a natural flocculant. One of the plants that can be developed in Indonesia is Boehmeria nivea, or what is known as Ramie, which contains cellulose that is still not utilized optimally. There is a method of isolation of alpha-cellulose derived from Boehmeria nivea and its application as a flocculant in synthetic wastewater presented in this paper. The alpha-cellulose of Boehmeria nivea was used as a flocculant in jar testing using kaolin suspension (5 g/L). The study shows that adding alpha-cellulose as an aid to PAC slightly increased the turbidity removal efficiency, and further modification of alpha-cellulose by cationic grafts into cationic cellulose is needed.

Electrocoagulation of azo dye containing synthetic wastewater using monopolar iron electrodes and the characterization of the sludge

2019 ◽  
Vol 14 (3) ◽  
pp. 587-597 ◽  
Author(s):  
A. Suresh ◽  
S. Sathish ◽  
G. Narendrakumar
Keyword(s):  
Wastewater Treatment ◽  
Congo Red ◽  
Operating Time ◽  
Synthetic Wastewater ◽  
Water And Wastewater Treatment ◽  
Plant Materials ◽  
Suitable Alternative ◽  
Natural Coagulant ◽  
Iron Electrodes ◽  
Water And Wastewater

Abstract In this study, the decolourisation of Congo red dye is studied using the natural coagulant Maize Seed Powder (MSP); a suitable alternative for chemical coagulants in electro coagulation (EC) using iron electrodes. The effects of various parameters such as initial dye concentration, pH, applied voltage and time on the decolourisation of dye were studied. The cost of water treatment is increasing due to suspended and colloidal particle load. The coagulation process can be used as a primary step for water and wastewater treatment processes. Among plant materials that have been tested, the seeds of maize have been shown to be one of the most effective primary coagulants in water and wastewater treatment. The removal efficiency of the dye with and without the presence of MSP as a coagulant aid was determined. In the EC process maximum Congo red removal was achieved by using the natural coagulant MSP. Congo red (CR) decolourisation efficiency is 95.23% at a coagulant dosage of 50 mg/lit, pH of 5, operating time of 15 minutes, and a power of 40 volts with iron electrodes. In the absence of coagulant MSP, Congo red decolourisation efficiency was found to be 80.31% at pH of 5, operating time of 15 minutes, and a power of 40 volts with iron electrodes.

Synthesis, Characterization and Floculating Properties of Coply(AM-DAC) in Water and Wastewater Treatment

2011 ◽  
Vol 396-398 ◽  
pp. 1369-1374 ◽  
Author(s):  
Wein Min Sun ◽  
Guang Cheng Zhang ◽  
Meng Meng Su ◽  
He Lin Li ◽  
Xia Lei
Keyword(s):  
Wastewater Treatment ◽  
Fourier Transform ◽  
Sodium Sulfite ◽  
Ammonium Persulfate ◽  
Solution Polymerization ◽  
Water And Wastewater Treatment ◽  
Turbidity Removal ◽  
Initiation System ◽  
Water And Wastewater ◽  
Clay Suspensions

A cationic polymeric flocculant was synthesized through solution polymerization. The polymerization was initiated by acrylamide and Aacryloxyethyltrimethyl Ammonium Chloride(DAC) monomers, and ammonium persulfate and sodium sulfite as redox initiation system. The copolymer obtained was characterized by Fourier-transform infrared (FTIR) spectroscopy. Its flocculating properties were evaluated by turbidity removal with clay suspensions, turbidity and COD removal with sewage using standard jar tests. The results demonstrate that the copolymer can be used as a kind of cationic polymeric flocculant in water and wastewater treatment.

On the use of crushed shells of apricot stones as the upper layer in dual media filters

2004 ◽  
Vol 48 (11-12) ◽  
pp. 497-503 ◽  
Author(s):  
S. Aksoğan ◽  
A. Baştürk ◽  
E. Yüksel ◽  
Ö Akgiray
Keyword(s):  
Wastewater Treatment ◽  
Silica Sand ◽  
Water And Wastewater Treatment ◽  
Turbidity Removal ◽  
Small Water ◽  
Anthracite Coal ◽  
The World ◽  
Water And Wastewater ◽  
Removal Efficiencies ◽  
Wastewater Treatment Systems

The use of crushed shells of apricot stones instead of anthracite coal in dual-media filters is investigated. Turbidity removal efficiencies were measured for several filtration rates in dual media filters composed of shells of apricot stones above silica sand and anthracite coal above silica sand. Backwash (fluidization) experiments were carried out using sieved fractions of crushed shells of apricot stones to establish curves of expansion versus backwash velocity at 25°C. Such curves can be used in the design of filters employing this material. It is believed that the use of such a locally available and cheaper alternative filter medium would be of interest in many small water and wastewater treatment systems around the world.

Chemical Water and Wastewater Treatment VIII

2015 ◽  
Vol 4 (0) ◽  
pp. 9781780402840-9781780402840
Author(s):  
H. Hahn ◽  
E. Hoffman ◽  
H. Odegaard
Keyword(s):  
Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Water And Wastewater ◽  
Chemical Water

Water and Wastewater Treatment for a Small Island Resort

1989 ◽  
Vol 21 (2) ◽  
pp. 189-193 ◽  
Author(s):  
B. Rigden
Keyword(s):  
Wastewater Treatment ◽  
Reverse Osmosis ◽  
Small Island ◽  
Rotating Biological Contactor ◽  
Water And Wastewater Treatment ◽  
Water And Wastewater ◽  
Operational Data ◽  
Reverse Osmosis Desalination

The design of a reverse osmosis desalination unit and a rotating biological contactor for water and wastewater treatment for a small island resort is described. Some operational data are presented and recommendations for design flows and loadings are made.

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