Requirements for the composition and properties of wastewater

Annex 1 mandatory

General requirements for the composition and
water properties of water bodies
in control points and places of drinking, household and
recreational water use

№	Indicators	Categories water use
For drinking and household water supply, as well as for water supply of food enterprises	For recreational water use, as well as within the boundaries of populated areas
1	2	3	4
1	weighted substances*	At wastewater discharge, work at a water body and in the coastal zone the content of suspended solids in the control point (point) should not increase in comparison with natural conditions by more than
0.25 mg/dm3	0.75 mg/dm3
For water bodies containing more than 30 mg/dm3 of natural suspended solids, it is allowed to increase their content in water within 5 %. suspension with a fallout rate of more than 0.4 mm/s for flowing water bodies and more than 0.2 mm/s for reservoirs it is forbidden to launch
2	floating impurities	On the films of oil products, oils, fats should not be detected on the surface of the water and accumulation of other impurities
3	Coloring	Should not appear in a column
20 cm	10 cm
4	Smells	Water should not acquire odors with an intensity of more than 2 points found:
directly or in subsequent chlorination or other treatments	directly
5	Temperature	Summer the temperature of the water as a result of the discharge of sewage should not rise by more than than 3 °C compared to the average monthly water temperature of the hottest months of the year for the last 10 years
6	Hydrogen indicator (pH)	Should not go beyond 6.5-8.5
7	Mineralization water	Not more than 1000 mg/dm3, including: chlorides - 350; sulfates - 500 mg/dm3
8	Dissolved oxygen	Should not be less than 4 mg/dm3 in any period years, in a sample taken before 12 noon.
9	Biochemical oxygen consumption (BOD5)	Should not exceed at a temperature of 20 ° C
2 mg 02/dm3	4 mg 02/dm3
10	Chemical oxygen consumption (bichromate oxidizability), COD	Should not exceed:
15 mg O2/dm3	30 mg 02/dm3
11	Chemical substances	Not should be contained in the water of water bodies in concentrations exceeding the MPC or ODE
12	pathogens intestinal infections	Water should not contain pathogens of intestinal infections
13	Viable helminth eggs (ascaris, whipworm, toxocar, fasciol), oncospheres teniid and viable cysts of pathogenic intestinal protozoa	Should not be contained in 25 liters of water
14	thermotolerant coliform bacteria**	Not more than 100CFU/100ml**	Not more than 100 cfu/100ml
15	Are common coliform bacteria **	No more
1000 cfu/100 ml**	500 cfu/100 ml
16	coliphages **	No more
10PFU/100ml**	10PFU/100ml
17	Total volumetric activity of radionuclides in the joint presence***

Notes.

* The content of suspended solids in water of non-natural
origin (flakes of metal hydroxides formed during the treatment of waste
water, particles of asbestos, fiberglass, basalt, nylon, lavsan, etc.) do not
allowed.

** For centralized water supply; at
decentralized drinking water supply, water is subject to disinfection.

*** In case of exceeding the specified levels of radioactive
contamination of controlled water is carried out additional control
radionuclide contamination in accordance with the current standards of radiation
security;

AI-
specific activity of the 1st radionuclide in water;

YBi-
the corresponding intervention level for the 1st radionuclide (Appendix P-2 NRB-99).

Water supply and sewerage security zone

City water supply and sewerage facilities are objects of particular importance in the life support of the city. For network facilities of water supply and sewerage on street driveways, etc.

open territories, as well as subscribers located in the territories, the following security zone is established:

For network facilities of water supply and sewerage on street passages and other open areas, as well as subscribers located on the territories, the following security zone is established:

• for networks with a diameter of less than 600 mm - a 10-meter zone, 5 m each on both sides of the outer wall of the pipelines or from the protruding parts of the building, structure;
• for lines with a diameter of more than 1000 mm - a 20-50-meter zone on both sides of the pipeline wall or from the protruding parts of the building, structure, depending on the soil and the purpose of the pipeline. The water supply must run outside the facility at a distance of at least 5 m from the fence.

1 Calculation of concentrations of normatively permissible wastewater VAT discharge.

Concentration calculation
VAT and the choice of technological scheme
carried out taking into account the state
wastewater receiver - reservoir. In this
course project considers two
possible drainage schemes
industrial enterprises:

1. wastewater
   industrial plants are cleaned
   and discharged into a water body
   domestic wastewater is directed
   into the city sewerage networks and cleaned
   together with city drains;

2. if the quality
   industrial wastewater matches
   with the quality of domestic wastewater (according to weighted
   substances, BOD, nitrogen and others), in this
   case, the drains are combined and jointly
   sent to treatment facilities
   industrial enterprises, after which they are dumped
   into the reservoir.

Average concentrations
wastewater for treatment, and
necessary data on the water body
are in the task.

1. Permissible
   concentration weighted
   substances v
   wastewater discharged into the water
   an object:

, mg/l
(3.2)

where

R
– allowable increase in weighted
substances in a water body, after discharge
waste water is 0.25 or 0.75 mg/l
depending on the category of the reservoir;

b
– content of suspended solids in water
water body before wastewater discharge
(background concentration by weighted
substances), mg/l;

γ
– coefficient
mixing, determined by ;

q–
wastewater consumption, m3/day;

Q–
river flow at 95% supply,
m3/day

1. Permissible
   concentration on
   BOD_full
   in wastewater discharged into water
   an object:

, mg/l
(3.3)

where k–
average value of the coefficient
non-conservative organic
substances that cause BOD_full
background and wastewater, 1/day; for BOD_full
should be taken according to Appendix A;

L_MPC–
maximum allowable
BOD concentration_full
in the water of a water body, mg/l;

L_cm– BOD_full,
caused by organic matter
atmospheric
precipitation from the catchment area on the site
path in front of the checkpoint length
0.5 daily run, mg/l:

- for flat
rivers flowing through the territory, soil
which is not too rich in organic
substances - 1.7 - 2 mg / l;

- for swamp rivers
supply or flowing through the territory
with which an increased amount is washed off
organic substances - 2.3 -2.5 mg / l;

- if the distance
from wastewater outlet to control
alignment less than 0.5 daily run -
is taken equal to zero.

L_f– background
BOD concentration_full
in the water of a water body, mg/l (by order);

t– time
runaway from the place of wastewater discharge
to the settlement point, days;

n– multiplicity
total dilution in the watercourse, determined by
on .

1. Permissible
   concentration on
   petroleum products, surfactants, nitrogen and others
   substances
   in wastewater discharged into water
   object is determined by the formula:

, mg/l (3.4)

where
— non-conservative coefficient
given substance, showing the speed
oxygen consumption, depending on
nature of organic substances, 1/day;
accepted depending on the substance
(Appendix A).

WITH_MPC–
maximum allowable
the concentration of a given substance in water
water body, mg/l;

WITH_f– background
the concentration of a given substance in water
water body, mg/l (by order);

1. Permissible
   concentration on
   various pollution v
   wastewater, excluding coefficients
   nonconservative, determined by
   formula:

(3.5)

According to the results
calculation it is necessary to fill in the table,
an example is table 3.1, where C_in
– average concentration of pollution
after the averaging in the incoming
wastewater treatment, and_exit
- estimated maximum allowable
concentration at their outlet after purification.

Table 3.1 - Example
calculation of allowable concentrations
pollutants

Indicator	WITHin	WITHf	WITHMPC	WITHVAT (max)	WITHexit
weighted substances	300	10	10,25	45	15*
Oil products	50	0,01	0,05	11,5	0,05**
Copper	4,5	0,002	0,001	-108	0,001***
Iron (II)	28	0,2	0,5	0,8	0,8****

* By weighted
substances of concentration C_VAT
turned out to be much more than
WITH_MPC
and C_f
, so we can take the calculated
concentration C_exit
at the exit
from VOC equal to 15 mg/l, which corresponds to
the level of technological
process.

** For oil products
WITH_VAT
also far exceeds C_MPC
and C_f
, so C_exit
can be taken equal to_MPC
or in
compliance with the effects of the adopted
technologies.

*** By copper ions
background concentration C_f
already exceeds
WITH_MPC,
those. the reservoir is polluted, in this case on
output accept C_exit=C_MPC.

**** By iron ions
take the output concentration equal to
VAT concentration: C_exit=C_VAT.

Desired Effects
cleaning for any kind of pollution
for VOC are determined by the formula:

(3.5)

Desired effect
cleaning for any kind of pollution
for a separate building is considered
similarly, taking into account the concentrations on
entering and exiting the building
(indicative effect values ​​according to
various substances in tables B.4. and
B.5., Appendix B).