HJ 2043-2014Technical specificaions of starch industry wastewater treatment (English PDF)

3.1 Starch wastewater starch industry wastewater

Wastewater refers to corn, wheat, or potato starch as raw material to produce starch sugar produced during each step sum.

3.2 Starch sugar wastewater

Starch as raw material, the sum of the waste water through the catalyst (enzyme or acid) and water to produce sugar produced during each step.

3.3 Starch Wastewater modified starch wasterwater

Starch as raw material, through physical and chemical processes with varying degrees of change in their physical and chemical properties of the preparation of modified starch production process Total waste water generated in each step.

3.4 Corn steep water corn steepwater

Means wastewater contains large amounts of soluble proteins, organic phosphorus and other substances in the production process of corn starch corn soaking process produced.

3.5 Conveying washing wastewater conveying and cleaning wastewater

It refers to potato starch production process of raw materials, cleaning, transporting step that contains a large amount of sediment, suspended solids and other contaminants Wastewater.

4 of pollutants and pollution load

4.1 Wastewater origin and category

4.1.1 corn starch as raw materials, mainly from corn steep water, germ separation and washing detergent fiber, flotation concentrate, Drainage protein filter press etc. Section protein recovered after evaporation and condensation produced when corn soaking water recycling.

4.1.2 In the production of potato starch as raw materials, mainly from wastewater off juice, separation, dehydration and drainage station proteins recovered, as well as the original Conveying washing wastewater.

4.1.3 wheat starch as raw materials, waste water consists of two parts. the settlement produced after centrifugation and the supernatant pond yellow Whey.

4.1.4 starch as raw materials to produce starch sugar, waste water mainly from the ion exchange column water wash, rinse water and wash water of various devices, Liquefaction and saccharification process cooling water.

4.1.5 The main pollutants starch wastewater suspended solids (SS), chemical oxygen demand (COD), biochemical oxygen demand (BOD), ammonia (NH3-N), Total Nitrogen (TN) and total phosphorus (TP).

4.2 Water Wastewater

4.2.1 Starch wastewater emissions of existing enterprises can determine by measuring, but also the actual conduct of tests to determine the water balance based on production. Wastewater discharge when the measurement, respond to the various production processes of wastewater discharged one by one measure, and the total discharge port when the factory production facilities for integrated waste Total water discharge actual measurement as the checking; measure should be consistent with HJ/T 91 technical requirements.

4.2.2 The new starch wastewater treatment project, the analogy discharge water similar to conventional production scale and the same kind of production process to determine the starch factory Wastewater emissions.

4.2.3 When there is no measured data and reference materials similar enterprises refer to Table 1.

Table 1 Typical starch industry wastewater production per unit of product

Type of starch, corn starch, potato starch tapioca starch, wheat starch sugar starch wastewater Advanced <=3 <=4 <=4 <=3 <=2.5 the average <=4 <=8 <=8 <=4 <=3 the amount of wastewater generated (M3/t starch) Usually <=5 <=12 <=12 <=5 <=3.5 the product of the coefficient of variation and diurnal variation coefficient 4.2.4 Wastewater variation coefficient equal to the amount of water, when the variation coefficient of 1.3 to 1.6, diurnal variation system Number of 1.1 to 1.3.

4.3 Water Wastewater

4.3.1 Quality of starch wastewater existing enterprise can be determined by assay sample can also be determined based on the actual production material balance. Sampling Tests when the deal with the various production processes of wastewater discharged individually sampled and the total opening of the plant wastewater discharge as comprehensive wastewater sampling check;

Sample tests shall comply with HJ/T 91 technical requirements.

4.3.2 The new starch wastewater treatment project, the same analogy existing scale of production and the same kind of production process of starch production plant pollution data to determine Wastewater quality.

4.3.3 When there is no measured data and reference materials similar enterprises can refer to Table 3.

Table 3 Typical water quality starch wastewater

raw material

Cod

CODCr

(Mg/L)

BOD

BOD5

(Mg/L)

Suspension

(Mg/L)

(Mg/L)

Ammonia

NH3-N

(Mg/L)

(Mg/L)

pH value

Maize 150002400 6000 ~ 5000300 ~ 60001000 ~ ~ ~ 15 010 ~ 40 070 ~ 5 803 Potato 10000 ~ 250001500 600010000 ~ 55000400 ~ ~ ~ 600 200 300 5 general requirements

5.1 General provisions

5.1.1 Starch Wastewater Treatment should follow the "three simultaneous" system, carry out the whole process of thought control, the implementation of cleaner production, from the production process Sources reduce emissions, improve resource and energy efficiency, control and reduce emissions of pollutants.

5.1.2 Starch wastewater should conform GB 25461, EIA approval document and total control requirements.

5.1.3 Starch wastewater treatment engineering solution should be based on business production and development plan as the basis, to implement the national industrial policy and industrial pollution Transfection control technology policy, combined with different climate and other environmental factors, overall centralization and decentralization, existing and new (expanded, changed) to build relationships, After determining technical and economic feasibility.

5.1.4 Starch Wastewater Treatment should give priority to high-efficiency, energy saving, investment saving treatment process, to ensure that wastewater treatment is provided Shi stable, reliable, safe operation and easy operation and maintenance, reduce operating costs.

5.1.5 Starch Wastewater Treatment should take measures to prevent secondary pollution, ensure the treatment and disposal of solid waste and stench were in line with GB 14554 and GB 18599 requirements, and shall conform to the EIA approval document; treatment plant (station) bounded noise shall comply GB 3096 and GB 12348 the provisions of the building interior noise source control facility shall comply with the relevant provisions of 87 GB J.

5.1.6 Starch Wastewater Treatment should be in accordance with the provisions of "pollution automatic monitoring and management approach" to install pollutant online monitoring system.

5.1.7 should be according to "the sewage outfall remediation technical requirements" (trial) Construction of waste water discharge.

5.2 Construction Scale

5.2.1 Construction scale starch wastewater treatment project, the scale of production should be based on business accounting, and according to wastewater treatment engineering services within the scope Available water, water quality and expected changes in the Integral; existing corporate governance project should be based on measured data, the new (expanded, changed) Construction Enterprise governance project should analogy or material balance method to determine.

5.2.2 Starch wastewater collection system should be unified planning and construction of industrial enterprises based on starch, into the waste water treatment station should conduit section size Press the maximum daily planned maximum flow design.

5.2.3 Construction scale wastewater treatment plant starch processing systems each addition to meeting the relevant design requirements, it must also meet the following requirements.

a) adjusting the wastewater treatment tank in front of the pool by the maximum daily maximum flow calculation;

b) adjusting tank and waste water treatment tank by the maximum daily flow calculation;

c) sludge treatment and disposal systems according to the average daily flow calculation;

d) back to the water treatment system is determined according to the reuse water quality and quantity.

5.3 Project constitutes a

5.3.1 Starch wastewater treatment plant (station) of the project consists of the main project, supporting the engineering, production management and service facilities.

5.3.2 The main project includes wastewater treatment system, recycled water systems, sludge treatment and disposal system, odor treatment systems, biogas Lee Use the system.

a) wastewater treatment system includes pretreatment, biological treatment and deep processing;

b) recycled water back to the water system include the storage, distribution and monitoring;

c) sludge treatment and disposal system includes a recycling anaerobic sludge and aerobic sludge homogenization, concentration, digestion, dehydration and final Disposal;

d) stench processing system including the collection and processing of the stench;

e) biogas utilization system including the reservoir, as well as pre-treatment before use and biogas utilization of biogas.

5.3.3 supporting the automation project, including electrical, plumbing and fire protection, heating, ventilation and air conditioning, building structure, monitoring and metrology laboratory setting CONSTRUCTION.

5.3.4 Production management and service facilities including office space, and so on duty.

5.3.5 Wastewater treatment plants (stations) should be set standardized outfall accordance with relevant state and local.

5.4 Plant (station) Location

5.4.1 Starch Wastewater Treatment Project site selection should include starch production enterprises overall planning, environmental impact assessment and meet the approval of the file to begging.

5.4.2 residential area or site planning and health protection from public buildings should perform the EIA approval document.

5.4.3 The site should be located as far as possible in the region below the factory production and living area in summer the prevailing wind direction.

5.4.4 If the enterprise starch factory area sloping terrain, sewage treatment plant (station) should be located in the lower reaches of the slope, the sewage can have gravity can.

5.4.5 site selection should consider flood threat from flooding, and should comply with the relevant provisions of GB 50016 in fireproof.

5.5 General layout

5.5.1 treatment plant (station) should be based on the overall arrangement of the various structures and functions processing requirements, combined with the terrain, climate and geological conditions Factors determined after technical and economic comparison, and should facilitate the construction, maintenance and management.

5.5.2 Each processing unit layout should seek compact and reasonable, to meet the construction, equipment installation, all types of pipeline connection is simple, maintenance management Ease of use requirements, and leave room for development and equipment replacement.

5.5.3 The design should be routed beyond pipelines, storage and maintenance of the accident venting facilities, and to ensure that substandard water or sludge to give vent properly Good treatment and disposal.

5.5.4 treatment plants (stations) may need to set the storage materials, pharmaceutical, sludge, waste and other places may not be open dumps, sludge and storage yard waste should be treated and disposed sludge seepage reflux to adjust exudate collection line pool.

Vertical Design 5.5.5 processing unit should fully consider the use of existing topography and elevation, as possible earthwork balance, gravity drainage, reduce Energy requirements.

5.5.6 When the treatment plant (station) construction staging, treatment plant (station) area shall be reserved for the size of the overall processing site, and overall Arrangement. Pipeline network and underground structures should be built first.

5.5.7 treatment plant (station) should be set to produce an auxiliary building, and meet the treatment process and daily management needs, the area should be based on treatment plant Binding (station) scale, process technology, management system and so determine the actual situation.

5.5.8 centralized treatment plant (station) is set depending on the specific needs to determine the wall, the wall height of not less than 2m.

5.5.9 centralized treatment plant (station) door size should meet the needs of the largest out of the device, and set up waste, chemicals Sinotrans side door.

6.1 General provisions

6.1.1 In the process design before, water quality, water quantity and variation response wastewater conduct a full investigation, and make the ne...