Control of Bulking Sludge in Agro-Industrial Treatment Plants

1990 ◽  
Vol 22 (9) ◽  
pp. 101-111 ◽  
Author(s):  
J. R. Rensink ◽  
H J. G. W. Donker
Keyword(s):  
Pilot Plant ◽  
Industrial Waste ◽  
Large Scale ◽  
Flow System ◽  
Plug Flow ◽  
Domestic Sewage ◽  
Waste Waters ◽  
Activated Sludge System ◽  
Mixed Systems ◽  
Feed Pattern

Bulking sludge has been studied on laboratory, pilot plant and large scale circumstances. Special attention has been paid to different kinds of agro-industrial waste waters and domestic sewage. It has been clearly shown that besides a deficiency of nutrients and oxygen, the feed pattern of the plant plays a very important role in the field of bulking sludge control. Different experiments have obviously demonstrated that a completely mixed activated sludge system leads much more to bulking sludge than a plug-flow system. Also a contact tank (selector ahead of the plant) is positive for depressing bulking sludge in completely mixed systems.

Sludge Disposal to Sea in South Africa

1982 ◽  
Vol 14 (3) ◽  
pp. 93-107 ◽  
Author(s):  
D C Macleod
Keyword(s):  
Public Health ◽  
South Africa ◽  
Marine Environment ◽  
Industrial Waste ◽  
Domestic Sewage ◽  
Monitoring Programme ◽  
Environment And Public Health ◽  
Research Project ◽  
Sludge Disposal ◽  
Sea Outfalls

The performance of two sea outfalls that have been in operation off the coast of Durban for over 10 years has been monitored for effects on the marine environment and public health. The discharge has been a mixture of domestic sewage and industrial waste from which a large proportion of the sludge has been removed but a 2-year research project, in which the balance of the sludge is also being discharged, has commenced. Performance of the outfalls and details of the monitoring programme are reviewed.

Tertiary nitrification in pilot-plant plug-flow fixed-film reactors with long-term ammonium deficiency

1994 ◽  
Vol 29 (10-11) ◽  
pp. 61-67 ◽  
Author(s):  
M. Fruhen ◽  
K. Böcker ◽  
S. Eidens ◽  
D. Haaf ◽  
M. Liebeskind ◽  
...  
Keyword(s):  
Pilot Plant ◽  
Effective Means ◽  
Plug Flow ◽  
Nitrification Rate ◽  
Industrial Project ◽  
Transfer Processes ◽  
Fixed Film ◽  
Film Reactor ◽  
Observation Period

The objective of this study is to investigate to what extent the nitrification capacity of a pilot-plant fixed-film reactor changes during extensive periods of nutrient supply deficiency. The examined pilot-plant was an upflow reactor filled with swelling clay of medium grain size (6 to 8 mm). The experiments revealed that the maximum nitrification rate remained practically constant during the first weeks after the onset of unregulated ammonium supply. The capacity declined slowly, dropping to approximately 66% of the initial capacity after about ten weeks. Still ammonium peaks of up to 8 mg/l were readily nitrified throughout the entire period of the experiment. The reduction in nitrification capacity during the observation period did not result from decay processes of biomass but from the reactor becoming blocked and thus hampering transfer processes. It could be observed that the detached organisms attached again further up. This semi-industrial project demonstrated that a plug-flow fixed-film reactor can be used as effective means of tertiary nitrification.

Biogas Production Using Anaerobic Digestion of Industrial Waste

2016 ◽  
Vol 832 ◽  
pp. 55-62
Author(s):  
Ján Gaduš ◽  
Tomáš Giertl ◽  
Viera Kažimírová
Keyword(s):  
Anaerobic Digestion ◽  
Industrial Waste ◽  
Large Scale ◽  
Biogas Production ◽  
Biogas Plant ◽  
Parallel Operation ◽  
Paper Production ◽  
Biochemical Conversion ◽  
Mixed Biomass ◽  
Economic Balance

In the paper experiments and theory of biogas production using industrial waste from paper production as a co-substrate are described. The main aim of the experiments was to evaluate the sensitivity and applicability of the biochemical conversion using the anaerobic digestion of the mixed biomass in the pilot fermentor (5 m3), where the mesophillic temperature was maintained. It was in parallel operation with a large scale fermentor (100 m3). The research was carried out at the biogas plant in Kolíňany, which is a demonstration facility of the Slovak University of Agriculture in Nitra. The experiments proved that the waste arising from the paper production can be used in case of its appropriate dosing as an input substrate for biogas production, and thus it can improve the economic balance of the biogas plant.

Impact of Lockdown on Health of the Yamuna river at Delhi Stretch, India

2021 ◽  
Vol 27 (1) ◽  
Author(s):  
MANOJ KUMAR SHUKLA
Keyword(s):  
Water Quality ◽  
Industrial Waste ◽  
Quality Parameters ◽  
Domestic Sewage ◽  
Pollution Monitoring ◽  
Yamuna River ◽  
Industrial Pollutants ◽  
The Impact ◽  
Positive Effect

Present study points out the impact of Lockdown on the health of the Yamuna river at Delhi stretch by comparing prelockdown and Post-lockdown period by studying the reports of pollution monitoring agencies. Delhi segment of the Yamuna is highly polluted, where alongwith domestic sewage a huge quantity of industrial waste is being discharged continuously without proper treatment. Pre lockdown (March 2020) water quality parameters at three sampling stations named as Palla, Nizammuddin Bridge and Okhla barrage U/s in Delhi were, pH were 8.7, 7.3 and 7.2, DO were 17.1 mg/L, not detected in later two sites, BOD were 7.9 mg/L, 57 mg/L and 27 mg/L and COD were 28 mg/L, 90 mg/L and 95 mg/L respectively and postlockdown period (April 2020) the pH was 7.8, 7.2 and 7.1, DO was 8.3 mg/L, 2.4 mg/L and 1.2 mg/L BOD was 2 mg/L, 5.6 mg/ L and 6.1 mg/L and COD were 6 mg/L, 16 mg/L and 18 mg/L respectively. The study of these parameters at three sampling stations reveals that the lack of industrial pollutants discharging due to nationwide lockdown for COVID-19 pandemic had positive effect on water quality of this river. Water quality could be maintained by planned establishment of industries and setup of ETP with without gap between generation and treatment.

Peat as Sorbent for Cu2+ and Cr3+ Ions

2011 ◽  
Vol 50 (1-2) ◽  
pp. 149-158 ◽  
Author(s):  
A. Robalds ◽  
M. Klavins ◽  
A. Zicmanis
Keyword(s):  
Trace Elements ◽  
Industrial Waste ◽  
Metal Removal ◽  
Waste Waters ◽  
Natural Sorbent ◽  
High Sorption Capacity ◽  
Terrestrial Life ◽  
High Sorption ◽  
The Common ◽  
Insoluble Compounds

Peat as Sorbent for Cu2+ and Cr3+ Ions Heavy metals as trace elements can often be found in industrial waste waters, and their discharge to the environment is a significant threat due to their acute toxicity to the aquatic and terrestrial life. The common methods used for removal of toxic metals and trace elements from the municipal and industrial waste waters are based on their adsorption onto insoluble compounds - sorbents. Synthetic sorbents usually are quite expensive; therefore, as a prospective approach to the metal removal, the use of a natural sorbent - peat - was tested. Peat as sorbent was proved to have a relatively high sorption capacity in respect to the studied metal ions, it can be used batchwise and in a dynamic regime and is a relatively robust and reliable sorbent regarding pH, the ionic strength, and the amounts of sorbed metal.

Recovery of Lake Jyväsjärvi after pollution by municipal and industrial waste waters

2005 ◽  
Vol 29 (2) ◽  
pp. 619-622 ◽  
Author(s):  
Kalevi Salonen ◽  
Juha Karjalainen ◽  
Pia Högmander ◽  
Tapio Keskinen ◽  
Timo Huttula ◽  
...  
Keyword(s):  
Industrial Waste ◽  
Waste Waters
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