The applicability of the Sludge Biotic Index in a facility treating sugar refinery effluents and municipal wastewater

2020 ◽  
Author(s):  
Mirjana Kepec ◽  
Renata Matoničkin Kepčija ◽  
Barbara Vlaičević ◽  
Slavko Kepec ◽  
Vesna Gulin
Keyword(s):  
Municipal Wastewater ◽  
Biotic Index ◽  
Sugar Refinery

scholarly journals Discharge quality from municipal wastewater treatment plants and the Sludge Biotic Index for activated sludge: integrative assessment

2017 ◽  
Vol 12 (4) ◽  
pp. 857-870
Author(s):  
M. Ostoich ◽  
F. Serena ◽  
C. Zacchello ◽  
L. Falletti ◽  
M. Zambon ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Ecological Status ◽  
Biotic Index ◽  
Aeration Tank ◽  
Microbiological Analysis ◽  
Limit Values ◽  
Integrative Assessment

Abstract Wastewater treatment plants (WWTPs) are scrutinized by Environmental Authorities particularly regarding the compliance to discharge limit values fixed by national and local regulations. An integrated approach is necessary to achieve the objectives established with Directive 2000/60/EC (WFD) considering the ecological status of the receiving water body and the quality of the discharge. Specifically, documentary, technical, management and analytical controls should be developed. Moreover, integrative information on the behaviour of the activated sludge in the aeration tank can be useful for plant managers as well as for the regulating Authorities. The study presents the experience concerning WWTP regulation considering the analytic assessment of the discharge as well the monitoring of the Sludge Biotic Index (SBI) for activated sludge. Data from monitoring during the period 2008–14 on SBI values and chemical and microbiological data on the discharges of a sample of 35 WWTPs in the province of Venice (north-east Italy, Veneto region) are presented and discussed. Together with chemical and microbiological analysis, the SBI appears to be a highly useful index for the integrative assessment of plant functionality, in particular when monitoring and identifying critical situations that can determine the exceedance of discharge limit values. The SBI method, in an integrated control approach, can be used for small and medium sized WWTPs that only treat domestic wastewaters. In a case by case assessment this may even substitute part of the analytical monitoring carried out in the WWTPs' control process.

STUDIES REGARDING THE PERFORMANCES OF MUNICIPAL WASTEWATER TREATMENT PROCESSES

2006 ◽  
Vol 5 (4) ◽  
pp. 685-692
Author(s):  
Elisabeta Chirila ◽  
Ionela Carazeanu Popovici ◽  
Techin Ibadula ◽  
Alice Iordache
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Municipal Wastewater Treatment ◽  
Treatment Processes

COMPARISON OF CONVENTIONAL AND Vibrio fischeri BIOASSAYS FOR THE ASSESSMENT OF MUNICIPAL WASTEWATER TOXICITY

2012 ◽  
Vol 11 (11) ◽  
pp. 2073-2076 ◽  
Author(s):  
Nora Kovats ◽  
Maha Refaey ◽  
Bettina Varanka ◽  
Karoly Reich ◽  
Arpad Ferincz ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Vibrio Fischeri

Extra colour removal in a refinery

2011 ◽  
pp. 718-725 ◽  
Author(s):  
Laura Diego ◽  
Fernando Martín ◽  
Marta G de Quevedo ◽  
Jaime Sagristá
Keyword(s):  
Refining Process ◽  
Ion Exchange Resins ◽  
Colour Removal ◽  
Precipitated Calcium Carbonate ◽  
Sodium Bisulphite ◽  
Powdered Carbon ◽  
Raw Sugar ◽  
Sugar Refinery ◽  
Exchange Resins ◽  
Main Factor

The main factor affecting the raw sugar refining process is certainly “colour”. The higher colour removal, the higher is the obtained sugar yield. Therefore, colour removal is the main goal throughout the process. In a conventional sugar refinery colour is removed in the purification and decolorisation steps – the second one is normally done using ion-exchange resins – but there are some other ways of colour removal such as adding some colour removing agents (powdered carbon, sodium bisulphite, PCC [precipitated calcium carbonate]). In this article the pilot plant results of experiments of increasing colour removal in the refining process are described, such as PCC addition, 3rd carbonatation (re-purification), hydrogen peroxide addition, powdered carbon addition, sodium bisulphite addition and crystallization improvements. The good results achieved in some of these trials led to perform some industrial trials, the results of wich are summarized in this article as well.

GREEN refining technology

2015 ◽  
pp. 508-514 ◽  
Author(s):  
Craig Jensen ◽  
David Love
Keyword(s):  
Environmentally Friendly ◽  
Step Change ◽  
Energy Usage ◽  
Capital Equipment ◽  
Green Is ◽  
Cooling Crystallization ◽  
Sugar Refinery

The objective of this paper is to describe a “step-change” in refining technology being proposed by Tongaat Hulett. This patented technology is termed “GREEN” Refining Technology, where “GREEN” is an acronym for “Greatly Reduced Energy and Equipment Needs”. The name attempts to encapsulate the “environmentally friendly” benefits of reduced energy usage whilst also emphasising the major savings in both energy and capital equipment requirements of the technology. GREEN refining technology aims to substantially (and ultimately totally) replace evaporating crystallization with cooling crystallization in a sugar refinery.

Membrane Bioreactors for Municipal Wastewater Treatment

2015 ◽  
Vol 4 (0) ◽  
pp. 9781780402925-9781780402925
Author(s):  
H. van der Roest ◽  
D. Lawrence ◽  
A. van Bentem
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Membrane Bioreactors ◽  
Municipal Wastewater Treatment
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